2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
28 #include <linux/cpufreq.h>
29 #include <drm/drm_plane_helper.h>
31 #include "intel_drv.h"
32 #include "../../../platform/x86/intel_ips.h"
33 #include <linux/module.h>
34 #include <drm/drm_atomic_helper.h>
39 * RC6 is a special power stage which allows the GPU to enter an very
40 * low-voltage mode when idle, using down to 0V while at this stage. This
41 * stage is entered automatically when the GPU is idle when RC6 support is
42 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
44 * There are different RC6 modes available in Intel GPU, which differentiate
45 * among each other with the latency required to enter and leave RC6 and
46 * voltage consumed by the GPU in different states.
48 * The combination of the following flags define which states GPU is allowed
49 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
50 * RC6pp is deepest RC6. Their support by hardware varies according to the
51 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
52 * which brings the most power savings; deeper states save more power, but
53 * require higher latency to switch to and wake up.
55 #define INTEL_RC6_ENABLE (1<<0)
56 #define INTEL_RC6p_ENABLE (1<<1)
57 #define INTEL_RC6pp_ENABLE (1<<2)
59 static void gen9_init_clock_gating(struct drm_i915_private *dev_priv)
61 /* See Bspec note for PSR2_CTL bit 31, Wa#828:skl,bxt,kbl */
62 I915_WRITE(CHICKEN_PAR1_1,
63 I915_READ(CHICKEN_PAR1_1) | SKL_EDP_PSR_FIX_RDWRAP);
65 I915_WRITE(GEN8_CONFIG0,
66 I915_READ(GEN8_CONFIG0) | GEN9_DEFAULT_FIXES);
68 /* WaEnableChickenDCPR:skl,bxt,kbl,glk */
69 I915_WRITE(GEN8_CHICKEN_DCPR_1,
70 I915_READ(GEN8_CHICKEN_DCPR_1) | MASK_WAKEMEM);
72 /* WaFbcTurnOffFbcWatermark:skl,bxt,kbl */
73 /* WaFbcWakeMemOn:skl,bxt,kbl,glk */
74 I915_WRITE(DISP_ARB_CTL, I915_READ(DISP_ARB_CTL) |
76 DISP_FBC_MEMORY_WAKE);
78 /* WaFbcHighMemBwCorruptionAvoidance:skl,bxt,kbl */
79 I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) |
80 ILK_DPFC_DISABLE_DUMMY0);
83 static void bxt_init_clock_gating(struct drm_i915_private *dev_priv)
85 gen9_init_clock_gating(dev_priv);
87 /* WaDisableSDEUnitClockGating:bxt */
88 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
89 GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
93 * GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ applies on 3x6 GT SKUs only.
95 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
96 GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ);
99 * Wa: Backlight PWM may stop in the asserted state, causing backlight
102 I915_WRITE(GEN9_CLKGATE_DIS_0, I915_READ(GEN9_CLKGATE_DIS_0) |
103 PWM1_GATING_DIS | PWM2_GATING_DIS);
106 static void glk_init_clock_gating(struct drm_i915_private *dev_priv)
108 gen9_init_clock_gating(dev_priv);
111 * WaDisablePWMClockGating:glk
112 * Backlight PWM may stop in the asserted state, causing backlight
115 I915_WRITE(GEN9_CLKGATE_DIS_0, I915_READ(GEN9_CLKGATE_DIS_0) |
116 PWM1_GATING_DIS | PWM2_GATING_DIS);
118 /* WaDDIIOTimeout:glk */
119 if (IS_GLK_REVID(dev_priv, 0, GLK_REVID_A1)) {
120 u32 val = I915_READ(CHICKEN_MISC_2);
121 val &= ~(GLK_CL0_PWR_DOWN |
124 I915_WRITE(CHICKEN_MISC_2, val);
129 static void i915_pineview_get_mem_freq(struct drm_i915_private *dev_priv)
133 tmp = I915_READ(CLKCFG);
135 switch (tmp & CLKCFG_FSB_MASK) {
137 dev_priv->fsb_freq = 533; /* 133*4 */
140 dev_priv->fsb_freq = 800; /* 200*4 */
143 dev_priv->fsb_freq = 667; /* 167*4 */
146 dev_priv->fsb_freq = 400; /* 100*4 */
150 switch (tmp & CLKCFG_MEM_MASK) {
152 dev_priv->mem_freq = 533;
155 dev_priv->mem_freq = 667;
158 dev_priv->mem_freq = 800;
162 /* detect pineview DDR3 setting */
163 tmp = I915_READ(CSHRDDR3CTL);
164 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
167 static void i915_ironlake_get_mem_freq(struct drm_i915_private *dev_priv)
171 ddrpll = I915_READ16(DDRMPLL1);
172 csipll = I915_READ16(CSIPLL0);
174 switch (ddrpll & 0xff) {
176 dev_priv->mem_freq = 800;
179 dev_priv->mem_freq = 1066;
182 dev_priv->mem_freq = 1333;
185 dev_priv->mem_freq = 1600;
188 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
190 dev_priv->mem_freq = 0;
194 dev_priv->ips.r_t = dev_priv->mem_freq;
196 switch (csipll & 0x3ff) {
198 dev_priv->fsb_freq = 3200;
201 dev_priv->fsb_freq = 3733;
204 dev_priv->fsb_freq = 4266;
207 dev_priv->fsb_freq = 4800;
210 dev_priv->fsb_freq = 5333;
213 dev_priv->fsb_freq = 5866;
216 dev_priv->fsb_freq = 6400;
219 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
221 dev_priv->fsb_freq = 0;
225 if (dev_priv->fsb_freq == 3200) {
226 dev_priv->ips.c_m = 0;
227 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
228 dev_priv->ips.c_m = 1;
230 dev_priv->ips.c_m = 2;
234 static const struct cxsr_latency cxsr_latency_table[] = {
235 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
236 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
237 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
238 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
239 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
241 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
242 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
243 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
244 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
245 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
247 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
248 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
249 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
250 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
251 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
253 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
254 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
255 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
256 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
257 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
259 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
260 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
261 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
262 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
263 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
265 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
266 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
267 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
268 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
269 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
272 static const struct cxsr_latency *intel_get_cxsr_latency(bool is_desktop,
277 const struct cxsr_latency *latency;
280 if (fsb == 0 || mem == 0)
283 for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
284 latency = &cxsr_latency_table[i];
285 if (is_desktop == latency->is_desktop &&
286 is_ddr3 == latency->is_ddr3 &&
287 fsb == latency->fsb_freq && mem == latency->mem_freq)
291 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
296 static void chv_set_memory_dvfs(struct drm_i915_private *dev_priv, bool enable)
300 mutex_lock(&dev_priv->rps.hw_lock);
302 val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
304 val &= ~FORCE_DDR_HIGH_FREQ;
306 val |= FORCE_DDR_HIGH_FREQ;
307 val &= ~FORCE_DDR_LOW_FREQ;
308 val |= FORCE_DDR_FREQ_REQ_ACK;
309 vlv_punit_write(dev_priv, PUNIT_REG_DDR_SETUP2, val);
311 if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2) &
312 FORCE_DDR_FREQ_REQ_ACK) == 0, 3))
313 DRM_ERROR("timed out waiting for Punit DDR DVFS request\n");
315 mutex_unlock(&dev_priv->rps.hw_lock);
318 static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable)
322 mutex_lock(&dev_priv->rps.hw_lock);
324 val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
326 val |= DSP_MAXFIFO_PM5_ENABLE;
328 val &= ~DSP_MAXFIFO_PM5_ENABLE;
329 vlv_punit_write(dev_priv, PUNIT_REG_DSPFREQ, val);
331 mutex_unlock(&dev_priv->rps.hw_lock);
334 #define FW_WM(value, plane) \
335 (((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK)
337 static bool _intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable)
342 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
343 was_enabled = I915_READ(FW_BLC_SELF_VLV) & FW_CSPWRDWNEN;
344 I915_WRITE(FW_BLC_SELF_VLV, enable ? FW_CSPWRDWNEN : 0);
345 POSTING_READ(FW_BLC_SELF_VLV);
346 } else if (IS_G4X(dev_priv) || IS_I965GM(dev_priv)) {
347 was_enabled = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;
348 I915_WRITE(FW_BLC_SELF, enable ? FW_BLC_SELF_EN : 0);
349 POSTING_READ(FW_BLC_SELF);
350 } else if (IS_PINEVIEW(dev_priv)) {
351 val = I915_READ(DSPFW3);
352 was_enabled = val & PINEVIEW_SELF_REFRESH_EN;
354 val |= PINEVIEW_SELF_REFRESH_EN;
356 val &= ~PINEVIEW_SELF_REFRESH_EN;
357 I915_WRITE(DSPFW3, val);
358 POSTING_READ(DSPFW3);
359 } else if (IS_I945G(dev_priv) || IS_I945GM(dev_priv)) {
360 was_enabled = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;
361 val = enable ? _MASKED_BIT_ENABLE(FW_BLC_SELF_EN) :
362 _MASKED_BIT_DISABLE(FW_BLC_SELF_EN);
363 I915_WRITE(FW_BLC_SELF, val);
364 POSTING_READ(FW_BLC_SELF);
365 } else if (IS_I915GM(dev_priv)) {
367 * FIXME can't find a bit like this for 915G, and
368 * and yet it does have the related watermark in
369 * FW_BLC_SELF. What's going on?
371 was_enabled = I915_READ(INSTPM) & INSTPM_SELF_EN;
372 val = enable ? _MASKED_BIT_ENABLE(INSTPM_SELF_EN) :
373 _MASKED_BIT_DISABLE(INSTPM_SELF_EN);
374 I915_WRITE(INSTPM, val);
375 POSTING_READ(INSTPM);
380 trace_intel_memory_cxsr(dev_priv, was_enabled, enable);
382 DRM_DEBUG_KMS("memory self-refresh is %s (was %s)\n",
383 enableddisabled(enable),
384 enableddisabled(was_enabled));
389 bool intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable)
393 mutex_lock(&dev_priv->wm.wm_mutex);
394 ret = _intel_set_memory_cxsr(dev_priv, enable);
395 dev_priv->wm.vlv.cxsr = enable;
396 mutex_unlock(&dev_priv->wm.wm_mutex);
402 * Latency for FIFO fetches is dependent on several factors:
403 * - memory configuration (speed, channels)
405 * - current MCH state
406 * It can be fairly high in some situations, so here we assume a fairly
407 * pessimal value. It's a tradeoff between extra memory fetches (if we
408 * set this value too high, the FIFO will fetch frequently to stay full)
409 * and power consumption (set it too low to save power and we might see
410 * FIFO underruns and display "flicker").
412 * A value of 5us seems to be a good balance; safe for very low end
413 * platforms but not overly aggressive on lower latency configs.
415 static const int pessimal_latency_ns = 5000;
417 #define VLV_FIFO_START(dsparb, dsparb2, lo_shift, hi_shift) \
418 ((((dsparb) >> (lo_shift)) & 0xff) | ((((dsparb2) >> (hi_shift)) & 0x1) << 8))
420 static void vlv_get_fifo_size(struct intel_crtc_state *crtc_state)
422 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
423 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
424 struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state;
425 enum pipe pipe = crtc->pipe;
426 int sprite0_start, sprite1_start;
429 uint32_t dsparb, dsparb2, dsparb3;
431 dsparb = I915_READ(DSPARB);
432 dsparb2 = I915_READ(DSPARB2);
433 sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 0, 0);
434 sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 8, 4);
437 dsparb = I915_READ(DSPARB);
438 dsparb2 = I915_READ(DSPARB2);
439 sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 16, 8);
440 sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 24, 12);
443 dsparb2 = I915_READ(DSPARB2);
444 dsparb3 = I915_READ(DSPARB3);
445 sprite0_start = VLV_FIFO_START(dsparb3, dsparb2, 0, 16);
446 sprite1_start = VLV_FIFO_START(dsparb3, dsparb2, 8, 20);
453 fifo_state->plane[PLANE_PRIMARY] = sprite0_start;
454 fifo_state->plane[PLANE_SPRITE0] = sprite1_start - sprite0_start;
455 fifo_state->plane[PLANE_SPRITE1] = 511 - sprite1_start;
456 fifo_state->plane[PLANE_CURSOR] = 63;
458 DRM_DEBUG_KMS("Pipe %c FIFO size: %d/%d/%d/%d\n",
460 fifo_state->plane[PLANE_PRIMARY],
461 fifo_state->plane[PLANE_SPRITE0],
462 fifo_state->plane[PLANE_SPRITE1],
463 fifo_state->plane[PLANE_CURSOR]);
466 static int i9xx_get_fifo_size(struct drm_i915_private *dev_priv, int plane)
468 uint32_t dsparb = I915_READ(DSPARB);
471 size = dsparb & 0x7f;
473 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
475 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
476 plane ? "B" : "A", size);
481 static int i830_get_fifo_size(struct drm_i915_private *dev_priv, int plane)
483 uint32_t dsparb = I915_READ(DSPARB);
486 size = dsparb & 0x1ff;
488 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
489 size >>= 1; /* Convert to cachelines */
491 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
492 plane ? "B" : "A", size);
497 static int i845_get_fifo_size(struct drm_i915_private *dev_priv, int plane)
499 uint32_t dsparb = I915_READ(DSPARB);
502 size = dsparb & 0x7f;
503 size >>= 2; /* Convert to cachelines */
505 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
512 /* Pineview has different values for various configs */
513 static const struct intel_watermark_params pineview_display_wm = {
514 .fifo_size = PINEVIEW_DISPLAY_FIFO,
515 .max_wm = PINEVIEW_MAX_WM,
516 .default_wm = PINEVIEW_DFT_WM,
517 .guard_size = PINEVIEW_GUARD_WM,
518 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
520 static const struct intel_watermark_params pineview_display_hplloff_wm = {
521 .fifo_size = PINEVIEW_DISPLAY_FIFO,
522 .max_wm = PINEVIEW_MAX_WM,
523 .default_wm = PINEVIEW_DFT_HPLLOFF_WM,
524 .guard_size = PINEVIEW_GUARD_WM,
525 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
527 static const struct intel_watermark_params pineview_cursor_wm = {
528 .fifo_size = PINEVIEW_CURSOR_FIFO,
529 .max_wm = PINEVIEW_CURSOR_MAX_WM,
530 .default_wm = PINEVIEW_CURSOR_DFT_WM,
531 .guard_size = PINEVIEW_CURSOR_GUARD_WM,
532 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
534 static const struct intel_watermark_params pineview_cursor_hplloff_wm = {
535 .fifo_size = PINEVIEW_CURSOR_FIFO,
536 .max_wm = PINEVIEW_CURSOR_MAX_WM,
537 .default_wm = PINEVIEW_CURSOR_DFT_WM,
538 .guard_size = PINEVIEW_CURSOR_GUARD_WM,
539 .cacheline_size = PINEVIEW_FIFO_LINE_SIZE,
541 static const struct intel_watermark_params g4x_wm_info = {
542 .fifo_size = G4X_FIFO_SIZE,
543 .max_wm = G4X_MAX_WM,
544 .default_wm = G4X_MAX_WM,
546 .cacheline_size = G4X_FIFO_LINE_SIZE,
548 static const struct intel_watermark_params g4x_cursor_wm_info = {
549 .fifo_size = I965_CURSOR_FIFO,
550 .max_wm = I965_CURSOR_MAX_WM,
551 .default_wm = I965_CURSOR_DFT_WM,
553 .cacheline_size = G4X_FIFO_LINE_SIZE,
555 static const struct intel_watermark_params i965_cursor_wm_info = {
556 .fifo_size = I965_CURSOR_FIFO,
557 .max_wm = I965_CURSOR_MAX_WM,
558 .default_wm = I965_CURSOR_DFT_WM,
560 .cacheline_size = I915_FIFO_LINE_SIZE,
562 static const struct intel_watermark_params i945_wm_info = {
563 .fifo_size = I945_FIFO_SIZE,
564 .max_wm = I915_MAX_WM,
567 .cacheline_size = I915_FIFO_LINE_SIZE,
569 static const struct intel_watermark_params i915_wm_info = {
570 .fifo_size = I915_FIFO_SIZE,
571 .max_wm = I915_MAX_WM,
574 .cacheline_size = I915_FIFO_LINE_SIZE,
576 static const struct intel_watermark_params i830_a_wm_info = {
577 .fifo_size = I855GM_FIFO_SIZE,
578 .max_wm = I915_MAX_WM,
581 .cacheline_size = I830_FIFO_LINE_SIZE,
583 static const struct intel_watermark_params i830_bc_wm_info = {
584 .fifo_size = I855GM_FIFO_SIZE,
585 .max_wm = I915_MAX_WM/2,
588 .cacheline_size = I830_FIFO_LINE_SIZE,
590 static const struct intel_watermark_params i845_wm_info = {
591 .fifo_size = I830_FIFO_SIZE,
592 .max_wm = I915_MAX_WM,
595 .cacheline_size = I830_FIFO_LINE_SIZE,
599 * intel_calculate_wm - calculate watermark level
600 * @clock_in_khz: pixel clock
601 * @wm: chip FIFO params
602 * @cpp: bytes per pixel
603 * @latency_ns: memory latency for the platform
605 * Calculate the watermark level (the level at which the display plane will
606 * start fetching from memory again). Each chip has a different display
607 * FIFO size and allocation, so the caller needs to figure that out and pass
608 * in the correct intel_watermark_params structure.
610 * As the pixel clock runs, the FIFO will be drained at a rate that depends
611 * on the pixel size. When it reaches the watermark level, it'll start
612 * fetching FIFO line sized based chunks from memory until the FIFO fills
613 * past the watermark point. If the FIFO drains completely, a FIFO underrun
614 * will occur, and a display engine hang could result.
616 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
617 const struct intel_watermark_params *wm,
618 int fifo_size, int cpp,
619 unsigned long latency_ns)
621 long entries_required, wm_size;
624 * Note: we need to make sure we don't overflow for various clock &
626 * clocks go from a few thousand to several hundred thousand.
627 * latency is usually a few thousand
629 entries_required = ((clock_in_khz / 1000) * cpp * latency_ns) /
631 entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
633 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
635 wm_size = fifo_size - (entries_required + wm->guard_size);
637 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
639 /* Don't promote wm_size to unsigned... */
640 if (wm_size > (long)wm->max_wm)
641 wm_size = wm->max_wm;
643 wm_size = wm->default_wm;
646 * Bspec seems to indicate that the value shouldn't be lower than
647 * 'burst size + 1'. Certainly 830 is quite unhappy with low values.
648 * Lets go for 8 which is the burst size since certain platforms
649 * already use a hardcoded 8 (which is what the spec says should be
658 static bool intel_wm_plane_visible(const struct intel_crtc_state *crtc_state,
659 const struct intel_plane_state *plane_state)
661 struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
663 /* FIXME check the 'enable' instead */
664 if (!crtc_state->base.active)
668 * Treat cursor with fb as always visible since cursor updates
669 * can happen faster than the vrefresh rate, and the current
670 * watermark code doesn't handle that correctly. Cursor updates
671 * which set/clear the fb or change the cursor size are going
672 * to get throttled by intel_legacy_cursor_update() to work
673 * around this problem with the watermark code.
675 if (plane->id == PLANE_CURSOR)
676 return plane_state->base.fb != NULL;
678 return plane_state->base.visible;
681 static struct intel_crtc *single_enabled_crtc(struct drm_i915_private *dev_priv)
683 struct intel_crtc *crtc, *enabled = NULL;
685 for_each_intel_crtc(&dev_priv->drm, crtc) {
686 if (intel_crtc_active(crtc)) {
696 static void pineview_update_wm(struct intel_crtc *unused_crtc)
698 struct drm_i915_private *dev_priv = to_i915(unused_crtc->base.dev);
699 struct intel_crtc *crtc;
700 const struct cxsr_latency *latency;
704 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev_priv),
709 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
710 intel_set_memory_cxsr(dev_priv, false);
714 crtc = single_enabled_crtc(dev_priv);
716 const struct drm_display_mode *adjusted_mode =
717 &crtc->config->base.adjusted_mode;
718 const struct drm_framebuffer *fb =
719 crtc->base.primary->state->fb;
720 int cpp = fb->format->cpp[0];
721 int clock = adjusted_mode->crtc_clock;
724 wm = intel_calculate_wm(clock, &pineview_display_wm,
725 pineview_display_wm.fifo_size,
726 cpp, latency->display_sr);
727 reg = I915_READ(DSPFW1);
728 reg &= ~DSPFW_SR_MASK;
729 reg |= FW_WM(wm, SR);
730 I915_WRITE(DSPFW1, reg);
731 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
734 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
735 pineview_display_wm.fifo_size,
736 cpp, latency->cursor_sr);
737 reg = I915_READ(DSPFW3);
738 reg &= ~DSPFW_CURSOR_SR_MASK;
739 reg |= FW_WM(wm, CURSOR_SR);
740 I915_WRITE(DSPFW3, reg);
742 /* Display HPLL off SR */
743 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
744 pineview_display_hplloff_wm.fifo_size,
745 cpp, latency->display_hpll_disable);
746 reg = I915_READ(DSPFW3);
747 reg &= ~DSPFW_HPLL_SR_MASK;
748 reg |= FW_WM(wm, HPLL_SR);
749 I915_WRITE(DSPFW3, reg);
751 /* cursor HPLL off SR */
752 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
753 pineview_display_hplloff_wm.fifo_size,
754 cpp, latency->cursor_hpll_disable);
755 reg = I915_READ(DSPFW3);
756 reg &= ~DSPFW_HPLL_CURSOR_MASK;
757 reg |= FW_WM(wm, HPLL_CURSOR);
758 I915_WRITE(DSPFW3, reg);
759 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
761 intel_set_memory_cxsr(dev_priv, true);
763 intel_set_memory_cxsr(dev_priv, false);
767 static bool g4x_compute_wm0(struct drm_i915_private *dev_priv,
769 const struct intel_watermark_params *display,
770 int display_latency_ns,
771 const struct intel_watermark_params *cursor,
772 int cursor_latency_ns,
776 struct intel_crtc *crtc;
777 const struct drm_display_mode *adjusted_mode;
778 const struct drm_framebuffer *fb;
779 int htotal, hdisplay, clock, cpp;
780 int line_time_us, line_count;
781 int entries, tlb_miss;
783 crtc = intel_get_crtc_for_plane(dev_priv, plane);
784 if (!intel_crtc_active(crtc)) {
785 *cursor_wm = cursor->guard_size;
786 *plane_wm = display->guard_size;
790 adjusted_mode = &crtc->config->base.adjusted_mode;
791 fb = crtc->base.primary->state->fb;
792 clock = adjusted_mode->crtc_clock;
793 htotal = adjusted_mode->crtc_htotal;
794 hdisplay = crtc->config->pipe_src_w;
795 cpp = fb->format->cpp[0];
797 /* Use the small buffer method to calculate plane watermark */
798 entries = ((clock * cpp / 1000) * display_latency_ns) / 1000;
799 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
802 entries = DIV_ROUND_UP(entries, display->cacheline_size);
803 *plane_wm = entries + display->guard_size;
804 if (*plane_wm > (int)display->max_wm)
805 *plane_wm = display->max_wm;
807 /* Use the large buffer method to calculate cursor watermark */
808 line_time_us = max(htotal * 1000 / clock, 1);
809 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
810 entries = line_count * crtc->base.cursor->state->crtc_w * cpp;
811 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
814 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
815 *cursor_wm = entries + cursor->guard_size;
816 if (*cursor_wm > (int)cursor->max_wm)
817 *cursor_wm = (int)cursor->max_wm;
823 * Check the wm result.
825 * If any calculated watermark values is larger than the maximum value that
826 * can be programmed into the associated watermark register, that watermark
829 static bool g4x_check_srwm(struct drm_i915_private *dev_priv,
830 int display_wm, int cursor_wm,
831 const struct intel_watermark_params *display,
832 const struct intel_watermark_params *cursor)
834 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
835 display_wm, cursor_wm);
837 if (display_wm > display->max_wm) {
838 DRM_DEBUG_KMS("display watermark is too large(%d/%u), disabling\n",
839 display_wm, display->max_wm);
843 if (cursor_wm > cursor->max_wm) {
844 DRM_DEBUG_KMS("cursor watermark is too large(%d/%u), disabling\n",
845 cursor_wm, cursor->max_wm);
849 if (!(display_wm || cursor_wm)) {
850 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
857 static bool g4x_compute_srwm(struct drm_i915_private *dev_priv,
860 const struct intel_watermark_params *display,
861 const struct intel_watermark_params *cursor,
862 int *display_wm, int *cursor_wm)
864 struct intel_crtc *crtc;
865 const struct drm_display_mode *adjusted_mode;
866 const struct drm_framebuffer *fb;
867 int hdisplay, htotal, cpp, clock;
868 unsigned long line_time_us;
869 int line_count, line_size;
874 *display_wm = *cursor_wm = 0;
878 crtc = intel_get_crtc_for_plane(dev_priv, plane);
879 adjusted_mode = &crtc->config->base.adjusted_mode;
880 fb = crtc->base.primary->state->fb;
881 clock = adjusted_mode->crtc_clock;
882 htotal = adjusted_mode->crtc_htotal;
883 hdisplay = crtc->config->pipe_src_w;
884 cpp = fb->format->cpp[0];
886 line_time_us = max(htotal * 1000 / clock, 1);
887 line_count = (latency_ns / line_time_us + 1000) / 1000;
888 line_size = hdisplay * cpp;
890 /* Use the minimum of the small and large buffer method for primary */
891 small = ((clock * cpp / 1000) * latency_ns) / 1000;
892 large = line_count * line_size;
894 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
895 *display_wm = entries + display->guard_size;
897 /* calculate the self-refresh watermark for display cursor */
898 entries = line_count * cpp * crtc->base.cursor->state->crtc_w;
899 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
900 *cursor_wm = entries + cursor->guard_size;
902 return g4x_check_srwm(dev_priv,
903 *display_wm, *cursor_wm,
907 #define FW_WM_VLV(value, plane) \
908 (((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK_VLV)
910 static void vlv_write_wm_values(struct drm_i915_private *dev_priv,
911 const struct vlv_wm_values *wm)
915 for_each_pipe(dev_priv, pipe) {
916 trace_vlv_wm(intel_get_crtc_for_pipe(dev_priv, pipe), wm);
918 I915_WRITE(VLV_DDL(pipe),
919 (wm->ddl[pipe].plane[PLANE_CURSOR] << DDL_CURSOR_SHIFT) |
920 (wm->ddl[pipe].plane[PLANE_SPRITE1] << DDL_SPRITE_SHIFT(1)) |
921 (wm->ddl[pipe].plane[PLANE_SPRITE0] << DDL_SPRITE_SHIFT(0)) |
922 (wm->ddl[pipe].plane[PLANE_PRIMARY] << DDL_PLANE_SHIFT));
926 * Zero the (unused) WM1 watermarks, and also clear all the
927 * high order bits so that there are no out of bounds values
928 * present in the registers during the reprogramming.
930 I915_WRITE(DSPHOWM, 0);
931 I915_WRITE(DSPHOWM1, 0);
932 I915_WRITE(DSPFW4, 0);
933 I915_WRITE(DSPFW5, 0);
934 I915_WRITE(DSPFW6, 0);
937 FW_WM(wm->sr.plane, SR) |
938 FW_WM(wm->pipe[PIPE_B].plane[PLANE_CURSOR], CURSORB) |
939 FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_PRIMARY], PLANEB) |
940 FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_PRIMARY], PLANEA));
942 FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_SPRITE1], SPRITEB) |
943 FW_WM(wm->pipe[PIPE_A].plane[PLANE_CURSOR], CURSORA) |
944 FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_SPRITE0], SPRITEA));
946 FW_WM(wm->sr.cursor, CURSOR_SR));
948 if (IS_CHERRYVIEW(dev_priv)) {
949 I915_WRITE(DSPFW7_CHV,
950 FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE1], SPRITED) |
951 FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEC));
952 I915_WRITE(DSPFW8_CHV,
953 FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_SPRITE1], SPRITEF) |
954 FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_SPRITE0], SPRITEE));
955 I915_WRITE(DSPFW9_CHV,
956 FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_PRIMARY], PLANEC) |
957 FW_WM(wm->pipe[PIPE_C].plane[PLANE_CURSOR], CURSORC));
959 FW_WM(wm->sr.plane >> 9, SR_HI) |
960 FW_WM(wm->pipe[PIPE_C].plane[PLANE_SPRITE1] >> 8, SPRITEF_HI) |
961 FW_WM(wm->pipe[PIPE_C].plane[PLANE_SPRITE0] >> 8, SPRITEE_HI) |
962 FW_WM(wm->pipe[PIPE_C].plane[PLANE_PRIMARY] >> 8, PLANEC_HI) |
963 FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE1] >> 8, SPRITED_HI) |
964 FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0] >> 8, SPRITEC_HI) |
965 FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY] >> 8, PLANEB_HI) |
966 FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE1] >> 8, SPRITEB_HI) |
967 FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0] >> 8, SPRITEA_HI) |
968 FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY] >> 8, PLANEA_HI));
971 FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE1], SPRITED) |
972 FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEC));
974 FW_WM(wm->sr.plane >> 9, SR_HI) |
975 FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE1] >> 8, SPRITED_HI) |
976 FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0] >> 8, SPRITEC_HI) |
977 FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY] >> 8, PLANEB_HI) |
978 FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE1] >> 8, SPRITEB_HI) |
979 FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0] >> 8, SPRITEA_HI) |
980 FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY] >> 8, PLANEA_HI));
983 POSTING_READ(DSPFW1);
988 /* latency must be in 0.1us units. */
989 static unsigned int vlv_wm_method2(unsigned int pixel_rate,
990 unsigned int pipe_htotal,
991 unsigned int horiz_pixels,
993 unsigned int latency)
997 ret = (latency * pixel_rate) / (pipe_htotal * 10000);
998 ret = (ret + 1) * horiz_pixels * cpp;
999 ret = DIV_ROUND_UP(ret, 64);
1004 static void vlv_setup_wm_latency(struct drm_i915_private *dev_priv)
1006 /* all latencies in usec */
1007 dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM2] = 3;
1009 dev_priv->wm.max_level = VLV_WM_LEVEL_PM2;
1011 if (IS_CHERRYVIEW(dev_priv)) {
1012 dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM5] = 12;
1013 dev_priv->wm.pri_latency[VLV_WM_LEVEL_DDR_DVFS] = 33;
1015 dev_priv->wm.max_level = VLV_WM_LEVEL_DDR_DVFS;
1019 static uint16_t vlv_compute_wm_level(const struct intel_crtc_state *crtc_state,
1020 const struct intel_plane_state *plane_state,
1023 struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
1024 struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
1025 const struct drm_display_mode *adjusted_mode =
1026 &crtc_state->base.adjusted_mode;
1027 int clock, htotal, cpp, width, wm;
1029 if (dev_priv->wm.pri_latency[level] == 0)
1032 if (!plane_state->base.visible)
1035 cpp = plane_state->base.fb->format->cpp[0];
1036 clock = adjusted_mode->crtc_clock;
1037 htotal = adjusted_mode->crtc_htotal;
1038 width = crtc_state->pipe_src_w;
1039 if (WARN_ON(htotal == 0))
1042 if (plane->base.type == DRM_PLANE_TYPE_CURSOR) {
1044 * FIXME the formula gives values that are
1045 * too big for the cursor FIFO, and hence we
1046 * would never be able to use cursors. For
1047 * now just hardcode the watermark.
1051 wm = vlv_wm_method2(clock, htotal, width, cpp,
1052 dev_priv->wm.pri_latency[level] * 10);
1055 return min_t(int, wm, USHRT_MAX);
1058 static bool vlv_need_sprite0_fifo_workaround(unsigned int active_planes)
1060 return (active_planes & (BIT(PLANE_SPRITE0) |
1061 BIT(PLANE_SPRITE1))) == BIT(PLANE_SPRITE1);
1064 static int vlv_compute_fifo(struct intel_crtc_state *crtc_state)
1066 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1067 const struct vlv_pipe_wm *raw =
1068 &crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM2];
1069 struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state;
1070 unsigned int active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR);
1071 int num_active_planes = hweight32(active_planes);
1072 const int fifo_size = 511;
1073 int fifo_extra, fifo_left = fifo_size;
1074 int sprite0_fifo_extra = 0;
1075 unsigned int total_rate;
1076 enum plane_id plane_id;
1079 * When enabling sprite0 after sprite1 has already been enabled
1080 * we tend to get an underrun unless sprite0 already has some
1081 * FIFO space allcoated. Hence we always allocate at least one
1082 * cacheline for sprite0 whenever sprite1 is enabled.
1084 * All other plane enable sequences appear immune to this problem.
1086 if (vlv_need_sprite0_fifo_workaround(active_planes))
1087 sprite0_fifo_extra = 1;
1089 total_rate = raw->plane[PLANE_PRIMARY] +
1090 raw->plane[PLANE_SPRITE0] +
1091 raw->plane[PLANE_SPRITE1] +
1094 if (total_rate > fifo_size)
1097 if (total_rate == 0)
1100 for_each_plane_id_on_crtc(crtc, plane_id) {
1103 if ((active_planes & BIT(plane_id)) == 0) {
1104 fifo_state->plane[plane_id] = 0;
1108 rate = raw->plane[plane_id];
1109 fifo_state->plane[plane_id] = fifo_size * rate / total_rate;
1110 fifo_left -= fifo_state->plane[plane_id];
1113 fifo_state->plane[PLANE_SPRITE0] += sprite0_fifo_extra;
1114 fifo_left -= sprite0_fifo_extra;
1116 fifo_state->plane[PLANE_CURSOR] = 63;
1118 fifo_extra = DIV_ROUND_UP(fifo_left, num_active_planes ?: 1);
1120 /* spread the remainder evenly */
1121 for_each_plane_id_on_crtc(crtc, plane_id) {
1127 if ((active_planes & BIT(plane_id)) == 0)
1130 plane_extra = min(fifo_extra, fifo_left);
1131 fifo_state->plane[plane_id] += plane_extra;
1132 fifo_left -= plane_extra;
1135 WARN_ON(active_planes != 0 && fifo_left != 0);
1137 /* give it all to the first plane if none are active */
1138 if (active_planes == 0) {
1139 WARN_ON(fifo_left != fifo_size);
1140 fifo_state->plane[PLANE_PRIMARY] = fifo_left;
1146 static int vlv_num_wm_levels(struct drm_i915_private *dev_priv)
1148 return dev_priv->wm.max_level + 1;
1151 /* mark all levels starting from 'level' as invalid */
1152 static void vlv_invalidate_wms(struct intel_crtc *crtc,
1153 struct vlv_wm_state *wm_state, int level)
1155 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1157 for (; level < vlv_num_wm_levels(dev_priv); level++) {
1158 enum plane_id plane_id;
1160 for_each_plane_id_on_crtc(crtc, plane_id)
1161 wm_state->wm[level].plane[plane_id] = USHRT_MAX;
1163 wm_state->sr[level].cursor = USHRT_MAX;
1164 wm_state->sr[level].plane = USHRT_MAX;
1168 static u16 vlv_invert_wm_value(u16 wm, u16 fifo_size)
1173 return fifo_size - wm;
1177 * Starting from 'level' set all higher
1178 * levels to 'value' in the "raw" watermarks.
1180 static bool vlv_raw_plane_wm_set(struct intel_crtc_state *crtc_state,
1181 int level, enum plane_id plane_id, u16 value)
1183 struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
1184 int num_levels = vlv_num_wm_levels(dev_priv);
1187 for (; level < num_levels; level++) {
1188 struct vlv_pipe_wm *raw = &crtc_state->wm.vlv.raw[level];
1190 dirty |= raw->plane[plane_id] != value;
1191 raw->plane[plane_id] = value;
1197 static bool vlv_plane_wm_compute(struct intel_crtc_state *crtc_state,
1198 const struct intel_plane_state *plane_state)
1200 struct intel_plane *plane = to_intel_plane(plane_state->base.plane);
1201 enum plane_id plane_id = plane->id;
1202 int num_levels = vlv_num_wm_levels(to_i915(plane->base.dev));
1206 if (!plane_state->base.visible) {
1207 dirty |= vlv_raw_plane_wm_set(crtc_state, 0, plane_id, 0);
1211 for (level = 0; level < num_levels; level++) {
1212 struct vlv_pipe_wm *raw = &crtc_state->wm.vlv.raw[level];
1213 int wm = vlv_compute_wm_level(crtc_state, plane_state, level);
1214 int max_wm = plane_id == PLANE_CURSOR ? 63 : 511;
1219 dirty |= raw->plane[plane_id] != wm;
1220 raw->plane[plane_id] = wm;
1223 /* mark all higher levels as invalid */
1224 dirty |= vlv_raw_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX);
1228 DRM_DEBUG_KMS("%s wms: [0]=%d,[1]=%d,[2]=%d\n",
1230 crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM2].plane[plane_id],
1231 crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM5].plane[plane_id],
1232 crtc_state->wm.vlv.raw[VLV_WM_LEVEL_DDR_DVFS].plane[plane_id]);
1237 static bool vlv_plane_wm_is_valid(const struct intel_crtc_state *crtc_state,
1238 enum plane_id plane_id, int level)
1240 const struct vlv_pipe_wm *raw =
1241 &crtc_state->wm.vlv.raw[level];
1242 const struct vlv_fifo_state *fifo_state =
1243 &crtc_state->wm.vlv.fifo_state;
1245 return raw->plane[plane_id] <= fifo_state->plane[plane_id];
1248 static bool vlv_crtc_wm_is_valid(const struct intel_crtc_state *crtc_state, int level)
1250 return vlv_plane_wm_is_valid(crtc_state, PLANE_PRIMARY, level) &&
1251 vlv_plane_wm_is_valid(crtc_state, PLANE_SPRITE0, level) &&
1252 vlv_plane_wm_is_valid(crtc_state, PLANE_SPRITE1, level) &&
1253 vlv_plane_wm_is_valid(crtc_state, PLANE_CURSOR, level);
1256 static int vlv_compute_pipe_wm(struct intel_crtc_state *crtc_state)
1258 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1259 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1260 struct intel_atomic_state *state =
1261 to_intel_atomic_state(crtc_state->base.state);
1262 struct vlv_wm_state *wm_state = &crtc_state->wm.vlv.optimal;
1263 const struct vlv_fifo_state *fifo_state =
1264 &crtc_state->wm.vlv.fifo_state;
1265 int num_active_planes = hweight32(crtc_state->active_planes &
1266 ~BIT(PLANE_CURSOR));
1267 bool needs_modeset = drm_atomic_crtc_needs_modeset(&crtc_state->base);
1268 struct intel_plane_state *plane_state;
1269 struct intel_plane *plane;
1270 enum plane_id plane_id;
1272 unsigned int dirty = 0;
1274 for_each_intel_plane_in_state(state, plane, plane_state, i) {
1275 const struct intel_plane_state *old_plane_state =
1276 to_intel_plane_state(plane->base.state);
1278 if (plane_state->base.crtc != &crtc->base &&
1279 old_plane_state->base.crtc != &crtc->base)
1282 if (vlv_plane_wm_compute(crtc_state, plane_state))
1283 dirty |= BIT(plane->id);
1287 * DSPARB registers may have been reset due to the
1288 * power well being turned off. Make sure we restore
1289 * them to a consistent state even if no primary/sprite
1290 * planes are initially active.
1293 crtc_state->fifo_changed = true;
1298 /* cursor changes don't warrant a FIFO recompute */
1299 if (dirty & ~BIT(PLANE_CURSOR)) {
1300 const struct intel_crtc_state *old_crtc_state =
1301 to_intel_crtc_state(crtc->base.state);
1302 const struct vlv_fifo_state *old_fifo_state =
1303 &old_crtc_state->wm.vlv.fifo_state;
1305 ret = vlv_compute_fifo(crtc_state);
1309 if (needs_modeset ||
1310 memcmp(old_fifo_state, fifo_state,
1311 sizeof(*fifo_state)) != 0)
1312 crtc_state->fifo_changed = true;
1315 /* initially allow all levels */
1316 wm_state->num_levels = vlv_num_wm_levels(dev_priv);
1318 * Note that enabling cxsr with no primary/sprite planes
1319 * enabled can wedge the pipe. Hence we only allow cxsr
1320 * with exactly one enabled primary/sprite plane.
1322 wm_state->cxsr = crtc->pipe != PIPE_C && num_active_planes == 1;
1324 for (level = 0; level < wm_state->num_levels; level++) {
1325 const struct vlv_pipe_wm *raw = &crtc_state->wm.vlv.raw[level];
1326 const int sr_fifo_size = INTEL_INFO(dev_priv)->num_pipes * 512 - 1;
1328 if (!vlv_crtc_wm_is_valid(crtc_state, level))
1331 for_each_plane_id_on_crtc(crtc, plane_id) {
1332 wm_state->wm[level].plane[plane_id] =
1333 vlv_invert_wm_value(raw->plane[plane_id],
1334 fifo_state->plane[plane_id]);
1337 wm_state->sr[level].plane =
1338 vlv_invert_wm_value(max3(raw->plane[PLANE_PRIMARY],
1339 raw->plane[PLANE_SPRITE0],
1340 raw->plane[PLANE_SPRITE1]),
1343 wm_state->sr[level].cursor =
1344 vlv_invert_wm_value(raw->plane[PLANE_CURSOR],
1351 /* limit to only levels we can actually handle */
1352 wm_state->num_levels = level;
1354 /* invalidate the higher levels */
1355 vlv_invalidate_wms(crtc, wm_state, level);
1360 #define VLV_FIFO(plane, value) \
1361 (((value) << DSPARB_ ## plane ## _SHIFT_VLV) & DSPARB_ ## plane ## _MASK_VLV)
1363 static void vlv_atomic_update_fifo(struct intel_atomic_state *state,
1364 struct intel_crtc_state *crtc_state)
1366 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1367 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1368 const struct vlv_fifo_state *fifo_state =
1369 &crtc_state->wm.vlv.fifo_state;
1370 int sprite0_start, sprite1_start, fifo_size;
1372 if (!crtc_state->fifo_changed)
1375 sprite0_start = fifo_state->plane[PLANE_PRIMARY];
1376 sprite1_start = fifo_state->plane[PLANE_SPRITE0] + sprite0_start;
1377 fifo_size = fifo_state->plane[PLANE_SPRITE1] + sprite1_start;
1379 WARN_ON(fifo_state->plane[PLANE_CURSOR] != 63);
1380 WARN_ON(fifo_size != 511);
1382 trace_vlv_fifo_size(crtc, sprite0_start, sprite1_start, fifo_size);
1385 * uncore.lock serves a double purpose here. It allows us to
1386 * use the less expensive I915_{READ,WRITE}_FW() functions, and
1387 * it protects the DSPARB registers from getting clobbered by
1388 * parallel updates from multiple pipes.
1390 * intel_pipe_update_start() has already disabled interrupts
1391 * for us, so a plain spin_lock() is sufficient here.
1393 spin_lock(&dev_priv->uncore.lock);
1395 switch (crtc->pipe) {
1396 uint32_t dsparb, dsparb2, dsparb3;
1398 dsparb = I915_READ_FW(DSPARB);
1399 dsparb2 = I915_READ_FW(DSPARB2);
1401 dsparb &= ~(VLV_FIFO(SPRITEA, 0xff) |
1402 VLV_FIFO(SPRITEB, 0xff));
1403 dsparb |= (VLV_FIFO(SPRITEA, sprite0_start) |
1404 VLV_FIFO(SPRITEB, sprite1_start));
1406 dsparb2 &= ~(VLV_FIFO(SPRITEA_HI, 0x1) |
1407 VLV_FIFO(SPRITEB_HI, 0x1));
1408 dsparb2 |= (VLV_FIFO(SPRITEA_HI, sprite0_start >> 8) |
1409 VLV_FIFO(SPRITEB_HI, sprite1_start >> 8));
1411 I915_WRITE_FW(DSPARB, dsparb);
1412 I915_WRITE_FW(DSPARB2, dsparb2);
1415 dsparb = I915_READ_FW(DSPARB);
1416 dsparb2 = I915_READ_FW(DSPARB2);
1418 dsparb &= ~(VLV_FIFO(SPRITEC, 0xff) |
1419 VLV_FIFO(SPRITED, 0xff));
1420 dsparb |= (VLV_FIFO(SPRITEC, sprite0_start) |
1421 VLV_FIFO(SPRITED, sprite1_start));
1423 dsparb2 &= ~(VLV_FIFO(SPRITEC_HI, 0xff) |
1424 VLV_FIFO(SPRITED_HI, 0xff));
1425 dsparb2 |= (VLV_FIFO(SPRITEC_HI, sprite0_start >> 8) |
1426 VLV_FIFO(SPRITED_HI, sprite1_start >> 8));
1428 I915_WRITE_FW(DSPARB, dsparb);
1429 I915_WRITE_FW(DSPARB2, dsparb2);
1432 dsparb3 = I915_READ_FW(DSPARB3);
1433 dsparb2 = I915_READ_FW(DSPARB2);
1435 dsparb3 &= ~(VLV_FIFO(SPRITEE, 0xff) |
1436 VLV_FIFO(SPRITEF, 0xff));
1437 dsparb3 |= (VLV_FIFO(SPRITEE, sprite0_start) |
1438 VLV_FIFO(SPRITEF, sprite1_start));
1440 dsparb2 &= ~(VLV_FIFO(SPRITEE_HI, 0xff) |
1441 VLV_FIFO(SPRITEF_HI, 0xff));
1442 dsparb2 |= (VLV_FIFO(SPRITEE_HI, sprite0_start >> 8) |
1443 VLV_FIFO(SPRITEF_HI, sprite1_start >> 8));
1445 I915_WRITE_FW(DSPARB3, dsparb3);
1446 I915_WRITE_FW(DSPARB2, dsparb2);
1452 POSTING_READ_FW(DSPARB);
1454 spin_unlock(&dev_priv->uncore.lock);
1459 static int vlv_compute_intermediate_wm(struct drm_device *dev,
1460 struct intel_crtc *crtc,
1461 struct intel_crtc_state *crtc_state)
1463 struct vlv_wm_state *intermediate = &crtc_state->wm.vlv.intermediate;
1464 const struct vlv_wm_state *optimal = &crtc_state->wm.vlv.optimal;
1465 const struct vlv_wm_state *active = &crtc->wm.active.vlv;
1468 intermediate->num_levels = min(optimal->num_levels, active->num_levels);
1469 intermediate->cxsr = optimal->cxsr && active->cxsr &&
1470 !crtc_state->disable_cxsr;
1472 for (level = 0; level < intermediate->num_levels; level++) {
1473 enum plane_id plane_id;
1475 for_each_plane_id_on_crtc(crtc, plane_id) {
1476 intermediate->wm[level].plane[plane_id] =
1477 min(optimal->wm[level].plane[plane_id],
1478 active->wm[level].plane[plane_id]);
1481 intermediate->sr[level].plane = min(optimal->sr[level].plane,
1482 active->sr[level].plane);
1483 intermediate->sr[level].cursor = min(optimal->sr[level].cursor,
1484 active->sr[level].cursor);
1487 vlv_invalidate_wms(crtc, intermediate, level);
1490 * If our intermediate WM are identical to the final WM, then we can
1491 * omit the post-vblank programming; only update if it's different.
1493 if (memcmp(intermediate, optimal, sizeof(*intermediate)) != 0)
1494 crtc_state->wm.need_postvbl_update = true;
1499 static void vlv_merge_wm(struct drm_i915_private *dev_priv,
1500 struct vlv_wm_values *wm)
1502 struct intel_crtc *crtc;
1503 int num_active_crtcs = 0;
1505 wm->level = dev_priv->wm.max_level;
1508 for_each_intel_crtc(&dev_priv->drm, crtc) {
1509 const struct vlv_wm_state *wm_state = &crtc->wm.active.vlv;
1514 if (!wm_state->cxsr)
1518 wm->level = min_t(int, wm->level, wm_state->num_levels - 1);
1521 if (num_active_crtcs != 1)
1524 if (num_active_crtcs > 1)
1525 wm->level = VLV_WM_LEVEL_PM2;
1527 for_each_intel_crtc(&dev_priv->drm, crtc) {
1528 const struct vlv_wm_state *wm_state = &crtc->wm.active.vlv;
1529 enum pipe pipe = crtc->pipe;
1531 wm->pipe[pipe] = wm_state->wm[wm->level];
1532 if (crtc->active && wm->cxsr)
1533 wm->sr = wm_state->sr[wm->level];
1535 wm->ddl[pipe].plane[PLANE_PRIMARY] = DDL_PRECISION_HIGH | 2;
1536 wm->ddl[pipe].plane[PLANE_SPRITE0] = DDL_PRECISION_HIGH | 2;
1537 wm->ddl[pipe].plane[PLANE_SPRITE1] = DDL_PRECISION_HIGH | 2;
1538 wm->ddl[pipe].plane[PLANE_CURSOR] = DDL_PRECISION_HIGH | 2;
1542 static bool is_disabling(int old, int new, int threshold)
1544 return old >= threshold && new < threshold;
1547 static bool is_enabling(int old, int new, int threshold)
1549 return old < threshold && new >= threshold;
1552 static void vlv_program_watermarks(struct drm_i915_private *dev_priv)
1554 struct vlv_wm_values *old_wm = &dev_priv->wm.vlv;
1555 struct vlv_wm_values new_wm = {};
1557 vlv_merge_wm(dev_priv, &new_wm);
1559 if (memcmp(old_wm, &new_wm, sizeof(new_wm)) == 0)
1562 if (is_disabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_DDR_DVFS))
1563 chv_set_memory_dvfs(dev_priv, false);
1565 if (is_disabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_PM5))
1566 chv_set_memory_pm5(dev_priv, false);
1568 if (is_disabling(old_wm->cxsr, new_wm.cxsr, true))
1569 _intel_set_memory_cxsr(dev_priv, false);
1571 vlv_write_wm_values(dev_priv, &new_wm);
1573 if (is_enabling(old_wm->cxsr, new_wm.cxsr, true))
1574 _intel_set_memory_cxsr(dev_priv, true);
1576 if (is_enabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_PM5))
1577 chv_set_memory_pm5(dev_priv, true);
1579 if (is_enabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_DDR_DVFS))
1580 chv_set_memory_dvfs(dev_priv, true);
1585 static void vlv_initial_watermarks(struct intel_atomic_state *state,
1586 struct intel_crtc_state *crtc_state)
1588 struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
1589 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
1591 mutex_lock(&dev_priv->wm.wm_mutex);
1592 crtc->wm.active.vlv = crtc_state->wm.vlv.intermediate;
1593 vlv_program_watermarks(dev_priv);
1594 mutex_unlock(&dev_priv->wm.wm_mutex);
1597 static void vlv_optimize_watermarks(struct intel_atomic_state *state,
1598 struct intel_crtc_state *crtc_state)
1600 struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
1601 struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
1603 if (!crtc_state->wm.need_postvbl_update)
1606 mutex_lock(&dev_priv->wm.wm_mutex);
1607 intel_crtc->wm.active.vlv = crtc_state->wm.vlv.optimal;
1608 vlv_program_watermarks(dev_priv);
1609 mutex_unlock(&dev_priv->wm.wm_mutex);
1612 #define single_plane_enabled(mask) is_power_of_2(mask)
1614 static void g4x_update_wm(struct intel_crtc *crtc)
1616 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
1617 static const int sr_latency_ns = 12000;
1618 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1619 int plane_sr, cursor_sr;
1620 unsigned int enabled = 0;
1623 if (g4x_compute_wm0(dev_priv, PIPE_A,
1624 &g4x_wm_info, pessimal_latency_ns,
1625 &g4x_cursor_wm_info, pessimal_latency_ns,
1626 &planea_wm, &cursora_wm))
1627 enabled |= 1 << PIPE_A;
1629 if (g4x_compute_wm0(dev_priv, PIPE_B,
1630 &g4x_wm_info, pessimal_latency_ns,
1631 &g4x_cursor_wm_info, pessimal_latency_ns,
1632 &planeb_wm, &cursorb_wm))
1633 enabled |= 1 << PIPE_B;
1635 if (single_plane_enabled(enabled) &&
1636 g4x_compute_srwm(dev_priv, ffs(enabled) - 1,
1639 &g4x_cursor_wm_info,
1640 &plane_sr, &cursor_sr)) {
1641 cxsr_enabled = true;
1643 cxsr_enabled = false;
1644 intel_set_memory_cxsr(dev_priv, false);
1645 plane_sr = cursor_sr = 0;
1648 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, "
1649 "B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1650 planea_wm, cursora_wm,
1651 planeb_wm, cursorb_wm,
1652 plane_sr, cursor_sr);
1655 FW_WM(plane_sr, SR) |
1656 FW_WM(cursorb_wm, CURSORB) |
1657 FW_WM(planeb_wm, PLANEB) |
1658 FW_WM(planea_wm, PLANEA));
1660 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1661 FW_WM(cursora_wm, CURSORA));
1662 /* HPLL off in SR has some issues on G4x... disable it */
1664 (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) |
1665 FW_WM(cursor_sr, CURSOR_SR));
1668 intel_set_memory_cxsr(dev_priv, true);
1671 static void i965_update_wm(struct intel_crtc *unused_crtc)
1673 struct drm_i915_private *dev_priv = to_i915(unused_crtc->base.dev);
1674 struct intel_crtc *crtc;
1679 /* Calc sr entries for one plane configs */
1680 crtc = single_enabled_crtc(dev_priv);
1682 /* self-refresh has much higher latency */
1683 static const int sr_latency_ns = 12000;
1684 const struct drm_display_mode *adjusted_mode =
1685 &crtc->config->base.adjusted_mode;
1686 const struct drm_framebuffer *fb =
1687 crtc->base.primary->state->fb;
1688 int clock = adjusted_mode->crtc_clock;
1689 int htotal = adjusted_mode->crtc_htotal;
1690 int hdisplay = crtc->config->pipe_src_w;
1691 int cpp = fb->format->cpp[0];
1692 unsigned long line_time_us;
1695 line_time_us = max(htotal * 1000 / clock, 1);
1697 /* Use ns/us then divide to preserve precision */
1698 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1700 entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
1701 srwm = I965_FIFO_SIZE - entries;
1705 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1708 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1709 cpp * crtc->base.cursor->state->crtc_w;
1710 entries = DIV_ROUND_UP(entries,
1711 i965_cursor_wm_info.cacheline_size);
1712 cursor_sr = i965_cursor_wm_info.fifo_size -
1713 (entries + i965_cursor_wm_info.guard_size);
1715 if (cursor_sr > i965_cursor_wm_info.max_wm)
1716 cursor_sr = i965_cursor_wm_info.max_wm;
1718 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1719 "cursor %d\n", srwm, cursor_sr);
1721 cxsr_enabled = true;
1723 cxsr_enabled = false;
1724 /* Turn off self refresh if both pipes are enabled */
1725 intel_set_memory_cxsr(dev_priv, false);
1728 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1731 /* 965 has limitations... */
1732 I915_WRITE(DSPFW1, FW_WM(srwm, SR) |
1736 I915_WRITE(DSPFW2, FW_WM(8, CURSORA) |
1737 FW_WM(8, PLANEC_OLD));
1738 /* update cursor SR watermark */
1739 I915_WRITE(DSPFW3, FW_WM(cursor_sr, CURSOR_SR));
1742 intel_set_memory_cxsr(dev_priv, true);
1747 static void i9xx_update_wm(struct intel_crtc *unused_crtc)
1749 struct drm_i915_private *dev_priv = to_i915(unused_crtc->base.dev);
1750 const struct intel_watermark_params *wm_info;
1755 int planea_wm, planeb_wm;
1756 struct intel_crtc *crtc, *enabled = NULL;
1758 if (IS_I945GM(dev_priv))
1759 wm_info = &i945_wm_info;
1760 else if (!IS_GEN2(dev_priv))
1761 wm_info = &i915_wm_info;
1763 wm_info = &i830_a_wm_info;
1765 fifo_size = dev_priv->display.get_fifo_size(dev_priv, 0);
1766 crtc = intel_get_crtc_for_plane(dev_priv, 0);
1767 if (intel_crtc_active(crtc)) {
1768 const struct drm_display_mode *adjusted_mode =
1769 &crtc->config->base.adjusted_mode;
1770 const struct drm_framebuffer *fb =
1771 crtc->base.primary->state->fb;
1774 if (IS_GEN2(dev_priv))
1777 cpp = fb->format->cpp[0];
1779 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1780 wm_info, fifo_size, cpp,
1781 pessimal_latency_ns);
1784 planea_wm = fifo_size - wm_info->guard_size;
1785 if (planea_wm > (long)wm_info->max_wm)
1786 planea_wm = wm_info->max_wm;
1789 if (IS_GEN2(dev_priv))
1790 wm_info = &i830_bc_wm_info;
1792 fifo_size = dev_priv->display.get_fifo_size(dev_priv, 1);
1793 crtc = intel_get_crtc_for_plane(dev_priv, 1);
1794 if (intel_crtc_active(crtc)) {
1795 const struct drm_display_mode *adjusted_mode =
1796 &crtc->config->base.adjusted_mode;
1797 const struct drm_framebuffer *fb =
1798 crtc->base.primary->state->fb;
1801 if (IS_GEN2(dev_priv))
1804 cpp = fb->format->cpp[0];
1806 planeb_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1807 wm_info, fifo_size, cpp,
1808 pessimal_latency_ns);
1809 if (enabled == NULL)
1814 planeb_wm = fifo_size - wm_info->guard_size;
1815 if (planeb_wm > (long)wm_info->max_wm)
1816 planeb_wm = wm_info->max_wm;
1819 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
1821 if (IS_I915GM(dev_priv) && enabled) {
1822 struct drm_i915_gem_object *obj;
1824 obj = intel_fb_obj(enabled->base.primary->state->fb);
1826 /* self-refresh seems busted with untiled */
1827 if (!i915_gem_object_is_tiled(obj))
1832 * Overlay gets an aggressive default since video jitter is bad.
1836 /* Play safe and disable self-refresh before adjusting watermarks. */
1837 intel_set_memory_cxsr(dev_priv, false);
1839 /* Calc sr entries for one plane configs */
1840 if (HAS_FW_BLC(dev_priv) && enabled) {
1841 /* self-refresh has much higher latency */
1842 static const int sr_latency_ns = 6000;
1843 const struct drm_display_mode *adjusted_mode =
1844 &enabled->config->base.adjusted_mode;
1845 const struct drm_framebuffer *fb =
1846 enabled->base.primary->state->fb;
1847 int clock = adjusted_mode->crtc_clock;
1848 int htotal = adjusted_mode->crtc_htotal;
1849 int hdisplay = enabled->config->pipe_src_w;
1851 unsigned long line_time_us;
1854 if (IS_I915GM(dev_priv) || IS_I945GM(dev_priv))
1857 cpp = fb->format->cpp[0];
1859 line_time_us = max(htotal * 1000 / clock, 1);
1861 /* Use ns/us then divide to preserve precision */
1862 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1864 entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
1865 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
1866 srwm = wm_info->fifo_size - entries;
1870 if (IS_I945G(dev_priv) || IS_I945GM(dev_priv))
1871 I915_WRITE(FW_BLC_SELF,
1872 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
1874 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
1877 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1878 planea_wm, planeb_wm, cwm, srwm);
1880 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
1881 fwater_hi = (cwm & 0x1f);
1883 /* Set request length to 8 cachelines per fetch */
1884 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
1885 fwater_hi = fwater_hi | (1 << 8);
1887 I915_WRITE(FW_BLC, fwater_lo);
1888 I915_WRITE(FW_BLC2, fwater_hi);
1891 intel_set_memory_cxsr(dev_priv, true);
1894 static void i845_update_wm(struct intel_crtc *unused_crtc)
1896 struct drm_i915_private *dev_priv = to_i915(unused_crtc->base.dev);
1897 struct intel_crtc *crtc;
1898 const struct drm_display_mode *adjusted_mode;
1902 crtc = single_enabled_crtc(dev_priv);
1906 adjusted_mode = &crtc->config->base.adjusted_mode;
1907 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1909 dev_priv->display.get_fifo_size(dev_priv, 0),
1910 4, pessimal_latency_ns);
1911 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
1912 fwater_lo |= (3<<8) | planea_wm;
1914 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
1916 I915_WRITE(FW_BLC, fwater_lo);
1919 /* latency must be in 0.1us units. */
1920 static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t cpp, uint32_t latency)
1924 if (WARN(latency == 0, "Latency value missing\n"))
1927 ret = (uint64_t) pixel_rate * cpp * latency;
1928 ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2;
1933 /* latency must be in 0.1us units. */
1934 static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
1935 uint32_t horiz_pixels, uint8_t cpp,
1940 if (WARN(latency == 0, "Latency value missing\n"))
1942 if (WARN_ON(!pipe_htotal))
1945 ret = (latency * pixel_rate) / (pipe_htotal * 10000);
1946 ret = (ret + 1) * horiz_pixels * cpp;
1947 ret = DIV_ROUND_UP(ret, 64) + 2;
1951 static uint32_t ilk_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels,
1955 * Neither of these should be possible since this function shouldn't be
1956 * called if the CRTC is off or the plane is invisible. But let's be
1957 * extra paranoid to avoid a potential divide-by-zero if we screw up
1958 * elsewhere in the driver.
1962 if (WARN_ON(!horiz_pixels))
1965 return DIV_ROUND_UP(pri_val * 64, horiz_pixels * cpp) + 2;
1968 struct ilk_wm_maximums {
1976 * For both WM_PIPE and WM_LP.
1977 * mem_value must be in 0.1us units.
1979 static uint32_t ilk_compute_pri_wm(const struct intel_crtc_state *cstate,
1980 const struct intel_plane_state *pstate,
1984 uint32_t method1, method2;
1987 if (!intel_wm_plane_visible(cstate, pstate))
1990 cpp = pstate->base.fb->format->cpp[0];
1992 method1 = ilk_wm_method1(cstate->pixel_rate, cpp, mem_value);
1997 method2 = ilk_wm_method2(cstate->pixel_rate,
1998 cstate->base.adjusted_mode.crtc_htotal,
1999 drm_rect_width(&pstate->base.dst),
2002 return min(method1, method2);
2006 * For both WM_PIPE and WM_LP.
2007 * mem_value must be in 0.1us units.
2009 static uint32_t ilk_compute_spr_wm(const struct intel_crtc_state *cstate,
2010 const struct intel_plane_state *pstate,
2013 uint32_t method1, method2;
2016 if (!intel_wm_plane_visible(cstate, pstate))
2019 cpp = pstate->base.fb->format->cpp[0];
2021 method1 = ilk_wm_method1(cstate->pixel_rate, cpp, mem_value);
2022 method2 = ilk_wm_method2(cstate->pixel_rate,
2023 cstate->base.adjusted_mode.crtc_htotal,
2024 drm_rect_width(&pstate->base.dst),
2026 return min(method1, method2);
2030 * For both WM_PIPE and WM_LP.
2031 * mem_value must be in 0.1us units.
2033 static uint32_t ilk_compute_cur_wm(const struct intel_crtc_state *cstate,
2034 const struct intel_plane_state *pstate,
2039 if (!intel_wm_plane_visible(cstate, pstate))
2042 cpp = pstate->base.fb->format->cpp[0];
2044 return ilk_wm_method2(cstate->pixel_rate,
2045 cstate->base.adjusted_mode.crtc_htotal,
2046 pstate->base.crtc_w, cpp, mem_value);
2049 /* Only for WM_LP. */
2050 static uint32_t ilk_compute_fbc_wm(const struct intel_crtc_state *cstate,
2051 const struct intel_plane_state *pstate,
2056 if (!intel_wm_plane_visible(cstate, pstate))
2059 cpp = pstate->base.fb->format->cpp[0];
2061 return ilk_wm_fbc(pri_val, drm_rect_width(&pstate->base.dst), cpp);
2065 ilk_display_fifo_size(const struct drm_i915_private *dev_priv)
2067 if (INTEL_GEN(dev_priv) >= 8)
2069 else if (INTEL_GEN(dev_priv) >= 7)
2076 ilk_plane_wm_reg_max(const struct drm_i915_private *dev_priv,
2077 int level, bool is_sprite)
2079 if (INTEL_GEN(dev_priv) >= 8)
2080 /* BDW primary/sprite plane watermarks */
2081 return level == 0 ? 255 : 2047;
2082 else if (INTEL_GEN(dev_priv) >= 7)
2083 /* IVB/HSW primary/sprite plane watermarks */
2084 return level == 0 ? 127 : 1023;
2085 else if (!is_sprite)
2086 /* ILK/SNB primary plane watermarks */
2087 return level == 0 ? 127 : 511;
2089 /* ILK/SNB sprite plane watermarks */
2090 return level == 0 ? 63 : 255;
2094 ilk_cursor_wm_reg_max(const struct drm_i915_private *dev_priv, int level)
2096 if (INTEL_GEN(dev_priv) >= 7)
2097 return level == 0 ? 63 : 255;
2099 return level == 0 ? 31 : 63;
2102 static unsigned int ilk_fbc_wm_reg_max(const struct drm_i915_private *dev_priv)
2104 if (INTEL_GEN(dev_priv) >= 8)
2110 /* Calculate the maximum primary/sprite plane watermark */
2111 static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
2113 const struct intel_wm_config *config,
2114 enum intel_ddb_partitioning ddb_partitioning,
2117 struct drm_i915_private *dev_priv = to_i915(dev);
2118 unsigned int fifo_size = ilk_display_fifo_size(dev_priv);
2120 /* if sprites aren't enabled, sprites get nothing */
2121 if (is_sprite && !config->sprites_enabled)
2124 /* HSW allows LP1+ watermarks even with multiple pipes */
2125 if (level == 0 || config->num_pipes_active > 1) {
2126 fifo_size /= INTEL_INFO(dev_priv)->num_pipes;
2129 * For some reason the non self refresh
2130 * FIFO size is only half of the self
2131 * refresh FIFO size on ILK/SNB.
2133 if (INTEL_GEN(dev_priv) <= 6)
2137 if (config->sprites_enabled) {
2138 /* level 0 is always calculated with 1:1 split */
2139 if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) {
2148 /* clamp to max that the registers can hold */
2149 return min(fifo_size, ilk_plane_wm_reg_max(dev_priv, level, is_sprite));
2152 /* Calculate the maximum cursor plane watermark */
2153 static unsigned int ilk_cursor_wm_max(const struct drm_device *dev,
2155 const struct intel_wm_config *config)
2157 /* HSW LP1+ watermarks w/ multiple pipes */
2158 if (level > 0 && config->num_pipes_active > 1)
2161 /* otherwise just report max that registers can hold */
2162 return ilk_cursor_wm_reg_max(to_i915(dev), level);
2165 static void ilk_compute_wm_maximums(const struct drm_device *dev,
2167 const struct intel_wm_config *config,
2168 enum intel_ddb_partitioning ddb_partitioning,
2169 struct ilk_wm_maximums *max)
2171 max->pri = ilk_plane_wm_max(dev, level, config, ddb_partitioning, false);
2172 max->spr = ilk_plane_wm_max(dev, level, config, ddb_partitioning, true);
2173 max->cur = ilk_cursor_wm_max(dev, level, config);
2174 max->fbc = ilk_fbc_wm_reg_max(to_i915(dev));
2177 static void ilk_compute_wm_reg_maximums(const struct drm_i915_private *dev_priv,
2179 struct ilk_wm_maximums *max)
2181 max->pri = ilk_plane_wm_reg_max(dev_priv, level, false);
2182 max->spr = ilk_plane_wm_reg_max(dev_priv, level, true);
2183 max->cur = ilk_cursor_wm_reg_max(dev_priv, level);
2184 max->fbc = ilk_fbc_wm_reg_max(dev_priv);
2187 static bool ilk_validate_wm_level(int level,
2188 const struct ilk_wm_maximums *max,
2189 struct intel_wm_level *result)
2193 /* already determined to be invalid? */
2194 if (!result->enable)
2197 result->enable = result->pri_val <= max->pri &&
2198 result->spr_val <= max->spr &&
2199 result->cur_val <= max->cur;
2201 ret = result->enable;
2204 * HACK until we can pre-compute everything,
2205 * and thus fail gracefully if LP0 watermarks
2208 if (level == 0 && !result->enable) {
2209 if (result->pri_val > max->pri)
2210 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
2211 level, result->pri_val, max->pri);
2212 if (result->spr_val > max->spr)
2213 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
2214 level, result->spr_val, max->spr);
2215 if (result->cur_val > max->cur)
2216 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
2217 level, result->cur_val, max->cur);
2219 result->pri_val = min_t(uint32_t, result->pri_val, max->pri);
2220 result->spr_val = min_t(uint32_t, result->spr_val, max->spr);
2221 result->cur_val = min_t(uint32_t, result->cur_val, max->cur);
2222 result->enable = true;
2228 static void ilk_compute_wm_level(const struct drm_i915_private *dev_priv,
2229 const struct intel_crtc *intel_crtc,
2231 struct intel_crtc_state *cstate,
2232 struct intel_plane_state *pristate,
2233 struct intel_plane_state *sprstate,
2234 struct intel_plane_state *curstate,
2235 struct intel_wm_level *result)
2237 uint16_t pri_latency = dev_priv->wm.pri_latency[level];
2238 uint16_t spr_latency = dev_priv->wm.spr_latency[level];
2239 uint16_t cur_latency = dev_priv->wm.cur_latency[level];
2241 /* WM1+ latency values stored in 0.5us units */
2249 result->pri_val = ilk_compute_pri_wm(cstate, pristate,
2250 pri_latency, level);
2251 result->fbc_val = ilk_compute_fbc_wm(cstate, pristate, result->pri_val);
2255 result->spr_val = ilk_compute_spr_wm(cstate, sprstate, spr_latency);
2258 result->cur_val = ilk_compute_cur_wm(cstate, curstate, cur_latency);
2260 result->enable = true;
2264 hsw_compute_linetime_wm(const struct intel_crtc_state *cstate)
2266 const struct intel_atomic_state *intel_state =
2267 to_intel_atomic_state(cstate->base.state);
2268 const struct drm_display_mode *adjusted_mode =
2269 &cstate->base.adjusted_mode;
2270 u32 linetime, ips_linetime;
2272 if (!cstate->base.active)
2274 if (WARN_ON(adjusted_mode->crtc_clock == 0))
2276 if (WARN_ON(intel_state->cdclk.logical.cdclk == 0))
2279 /* The WM are computed with base on how long it takes to fill a single
2280 * row at the given clock rate, multiplied by 8.
2282 linetime = DIV_ROUND_CLOSEST(adjusted_mode->crtc_htotal * 1000 * 8,
2283 adjusted_mode->crtc_clock);
2284 ips_linetime = DIV_ROUND_CLOSEST(adjusted_mode->crtc_htotal * 1000 * 8,
2285 intel_state->cdclk.logical.cdclk);
2287 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
2288 PIPE_WM_LINETIME_TIME(linetime);
2291 static void intel_read_wm_latency(struct drm_i915_private *dev_priv,
2294 if (IS_GEN9(dev_priv)) {
2297 int level, max_level = ilk_wm_max_level(dev_priv);
2299 /* read the first set of memory latencies[0:3] */
2300 val = 0; /* data0 to be programmed to 0 for first set */
2301 mutex_lock(&dev_priv->rps.hw_lock);
2302 ret = sandybridge_pcode_read(dev_priv,
2303 GEN9_PCODE_READ_MEM_LATENCY,
2305 mutex_unlock(&dev_priv->rps.hw_lock);
2308 DRM_ERROR("SKL Mailbox read error = %d\n", ret);
2312 wm[0] = val & GEN9_MEM_LATENCY_LEVEL_MASK;
2313 wm[1] = (val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) &
2314 GEN9_MEM_LATENCY_LEVEL_MASK;
2315 wm[2] = (val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) &
2316 GEN9_MEM_LATENCY_LEVEL_MASK;
2317 wm[3] = (val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) &
2318 GEN9_MEM_LATENCY_LEVEL_MASK;
2320 /* read the second set of memory latencies[4:7] */
2321 val = 1; /* data0 to be programmed to 1 for second set */
2322 mutex_lock(&dev_priv->rps.hw_lock);
2323 ret = sandybridge_pcode_read(dev_priv,
2324 GEN9_PCODE_READ_MEM_LATENCY,
2326 mutex_unlock(&dev_priv->rps.hw_lock);
2328 DRM_ERROR("SKL Mailbox read error = %d\n", ret);
2332 wm[4] = val & GEN9_MEM_LATENCY_LEVEL_MASK;
2333 wm[5] = (val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) &
2334 GEN9_MEM_LATENCY_LEVEL_MASK;
2335 wm[6] = (val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) &
2336 GEN9_MEM_LATENCY_LEVEL_MASK;
2337 wm[7] = (val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) &
2338 GEN9_MEM_LATENCY_LEVEL_MASK;
2341 * If a level n (n > 1) has a 0us latency, all levels m (m >= n)
2342 * need to be disabled. We make sure to sanitize the values out
2343 * of the punit to satisfy this requirement.
2345 for (level = 1; level <= max_level; level++) {
2346 if (wm[level] == 0) {
2347 for (i = level + 1; i <= max_level; i++)
2354 * WaWmMemoryReadLatency:skl,glk
2356 * punit doesn't take into account the read latency so we need
2357 * to add 2us to the various latency levels we retrieve from the
2358 * punit when level 0 response data us 0us.
2362 for (level = 1; level <= max_level; level++) {
2369 } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2370 uint64_t sskpd = I915_READ64(MCH_SSKPD);
2372 wm[0] = (sskpd >> 56) & 0xFF;
2374 wm[0] = sskpd & 0xF;
2375 wm[1] = (sskpd >> 4) & 0xFF;
2376 wm[2] = (sskpd >> 12) & 0xFF;
2377 wm[3] = (sskpd >> 20) & 0x1FF;
2378 wm[4] = (sskpd >> 32) & 0x1FF;
2379 } else if (INTEL_GEN(dev_priv) >= 6) {
2380 uint32_t sskpd = I915_READ(MCH_SSKPD);
2382 wm[0] = (sskpd >> SSKPD_WM0_SHIFT) & SSKPD_WM_MASK;
2383 wm[1] = (sskpd >> SSKPD_WM1_SHIFT) & SSKPD_WM_MASK;
2384 wm[2] = (sskpd >> SSKPD_WM2_SHIFT) & SSKPD_WM_MASK;
2385 wm[3] = (sskpd >> SSKPD_WM3_SHIFT) & SSKPD_WM_MASK;
2386 } else if (INTEL_GEN(dev_priv) >= 5) {
2387 uint32_t mltr = I915_READ(MLTR_ILK);
2389 /* ILK primary LP0 latency is 700 ns */
2391 wm[1] = (mltr >> MLTR_WM1_SHIFT) & ILK_SRLT_MASK;
2392 wm[2] = (mltr >> MLTR_WM2_SHIFT) & ILK_SRLT_MASK;
2396 static void intel_fixup_spr_wm_latency(struct drm_i915_private *dev_priv,
2399 /* ILK sprite LP0 latency is 1300 ns */
2400 if (IS_GEN5(dev_priv))
2404 static void intel_fixup_cur_wm_latency(struct drm_i915_private *dev_priv,
2407 /* ILK cursor LP0 latency is 1300 ns */
2408 if (IS_GEN5(dev_priv))
2411 /* WaDoubleCursorLP3Latency:ivb */
2412 if (IS_IVYBRIDGE(dev_priv))
2416 int ilk_wm_max_level(const struct drm_i915_private *dev_priv)
2418 /* how many WM levels are we expecting */
2419 if (INTEL_GEN(dev_priv) >= 9)
2421 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
2423 else if (INTEL_GEN(dev_priv) >= 6)
2429 static void intel_print_wm_latency(struct drm_i915_private *dev_priv,
2431 const uint16_t wm[8])
2433 int level, max_level = ilk_wm_max_level(dev_priv);
2435 for (level = 0; level <= max_level; level++) {
2436 unsigned int latency = wm[level];
2439 DRM_ERROR("%s WM%d latency not provided\n",
2445 * - latencies are in us on gen9.
2446 * - before then, WM1+ latency values are in 0.5us units
2448 if (IS_GEN9(dev_priv))
2453 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2454 name, level, wm[level],
2455 latency / 10, latency % 10);
2459 static bool ilk_increase_wm_latency(struct drm_i915_private *dev_priv,
2460 uint16_t wm[5], uint16_t min)
2462 int level, max_level = ilk_wm_max_level(dev_priv);
2467 wm[0] = max(wm[0], min);
2468 for (level = 1; level <= max_level; level++)
2469 wm[level] = max_t(uint16_t, wm[level], DIV_ROUND_UP(min, 5));
2474 static void snb_wm_latency_quirk(struct drm_i915_private *dev_priv)
2479 * The BIOS provided WM memory latency values are often
2480 * inadequate for high resolution displays. Adjust them.
2482 changed = ilk_increase_wm_latency(dev_priv, dev_priv->wm.pri_latency, 12) |
2483 ilk_increase_wm_latency(dev_priv, dev_priv->wm.spr_latency, 12) |
2484 ilk_increase_wm_latency(dev_priv, dev_priv->wm.cur_latency, 12);
2489 DRM_DEBUG_KMS("WM latency values increased to avoid potential underruns\n");
2490 intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency);
2491 intel_print_wm_latency(dev_priv, "Sprite", dev_priv->wm.spr_latency);
2492 intel_print_wm_latency(dev_priv, "Cursor", dev_priv->wm.cur_latency);
2495 static void ilk_setup_wm_latency(struct drm_i915_private *dev_priv)
2497 intel_read_wm_latency(dev_priv, dev_priv->wm.pri_latency);
2499 memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency,
2500 sizeof(dev_priv->wm.pri_latency));
2501 memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency,
2502 sizeof(dev_priv->wm.pri_latency));
2504 intel_fixup_spr_wm_latency(dev_priv, dev_priv->wm.spr_latency);
2505 intel_fixup_cur_wm_latency(dev_priv, dev_priv->wm.cur_latency);
2507 intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency);
2508 intel_print_wm_latency(dev_priv, "Sprite", dev_priv->wm.spr_latency);
2509 intel_print_wm_latency(dev_priv, "Cursor", dev_priv->wm.cur_latency);
2511 if (IS_GEN6(dev_priv))
2512 snb_wm_latency_quirk(dev_priv);
2515 static void skl_setup_wm_latency(struct drm_i915_private *dev_priv)
2517 intel_read_wm_latency(dev_priv, dev_priv->wm.skl_latency);
2518 intel_print_wm_latency(dev_priv, "Gen9 Plane", dev_priv->wm.skl_latency);
2521 static bool ilk_validate_pipe_wm(struct drm_device *dev,
2522 struct intel_pipe_wm *pipe_wm)
2524 /* LP0 watermark maximums depend on this pipe alone */
2525 const struct intel_wm_config config = {
2526 .num_pipes_active = 1,
2527 .sprites_enabled = pipe_wm->sprites_enabled,
2528 .sprites_scaled = pipe_wm->sprites_scaled,
2530 struct ilk_wm_maximums max;
2532 /* LP0 watermarks always use 1/2 DDB partitioning */
2533 ilk_compute_wm_maximums(dev, 0, &config, INTEL_DDB_PART_1_2, &max);
2535 /* At least LP0 must be valid */
2536 if (!ilk_validate_wm_level(0, &max, &pipe_wm->wm[0])) {
2537 DRM_DEBUG_KMS("LP0 watermark invalid\n");
2544 /* Compute new watermarks for the pipe */
2545 static int ilk_compute_pipe_wm(struct intel_crtc_state *cstate)
2547 struct drm_atomic_state *state = cstate->base.state;
2548 struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
2549 struct intel_pipe_wm *pipe_wm;
2550 struct drm_device *dev = state->dev;
2551 const struct drm_i915_private *dev_priv = to_i915(dev);
2552 struct intel_plane *intel_plane;
2553 struct intel_plane_state *pristate = NULL;
2554 struct intel_plane_state *sprstate = NULL;
2555 struct intel_plane_state *curstate = NULL;
2556 int level, max_level = ilk_wm_max_level(dev_priv), usable_level;
2557 struct ilk_wm_maximums max;
2559 pipe_wm = &cstate->wm.ilk.optimal;
2561 for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
2562 struct intel_plane_state *ps;
2564 ps = intel_atomic_get_existing_plane_state(state,
2569 if (intel_plane->base.type == DRM_PLANE_TYPE_PRIMARY)
2571 else if (intel_plane->base.type == DRM_PLANE_TYPE_OVERLAY)
2573 else if (intel_plane->base.type == DRM_PLANE_TYPE_CURSOR)
2577 pipe_wm->pipe_enabled = cstate->base.active;
2579 pipe_wm->sprites_enabled = sprstate->base.visible;
2580 pipe_wm->sprites_scaled = sprstate->base.visible &&
2581 (drm_rect_width(&sprstate->base.dst) != drm_rect_width(&sprstate->base.src) >> 16 ||
2582 drm_rect_height(&sprstate->base.dst) != drm_rect_height(&sprstate->base.src) >> 16);
2585 usable_level = max_level;
2587 /* ILK/SNB: LP2+ watermarks only w/o sprites */
2588 if (INTEL_GEN(dev_priv) <= 6 && pipe_wm->sprites_enabled)
2591 /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */
2592 if (pipe_wm->sprites_scaled)
2595 ilk_compute_wm_level(dev_priv, intel_crtc, 0, cstate,
2596 pristate, sprstate, curstate, &pipe_wm->raw_wm[0]);
2598 memset(&pipe_wm->wm, 0, sizeof(pipe_wm->wm));
2599 pipe_wm->wm[0] = pipe_wm->raw_wm[0];
2601 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
2602 pipe_wm->linetime = hsw_compute_linetime_wm(cstate);
2604 if (!ilk_validate_pipe_wm(dev, pipe_wm))
2607 ilk_compute_wm_reg_maximums(dev_priv, 1, &max);
2609 for (level = 1; level <= max_level; level++) {
2610 struct intel_wm_level *wm = &pipe_wm->raw_wm[level];
2612 ilk_compute_wm_level(dev_priv, intel_crtc, level, cstate,
2613 pristate, sprstate, curstate, wm);
2616 * Disable any watermark level that exceeds the
2617 * register maximums since such watermarks are
2620 if (level > usable_level)
2623 if (ilk_validate_wm_level(level, &max, wm))
2624 pipe_wm->wm[level] = *wm;
2626 usable_level = level;
2633 * Build a set of 'intermediate' watermark values that satisfy both the old
2634 * state and the new state. These can be programmed to the hardware
2637 static int ilk_compute_intermediate_wm(struct drm_device *dev,
2638 struct intel_crtc *intel_crtc,
2639 struct intel_crtc_state *newstate)
2641 struct intel_pipe_wm *a = &newstate->wm.ilk.intermediate;
2642 struct intel_pipe_wm *b = &intel_crtc->wm.active.ilk;
2643 int level, max_level = ilk_wm_max_level(to_i915(dev));
2646 * Start with the final, target watermarks, then combine with the
2647 * currently active watermarks to get values that are safe both before
2648 * and after the vblank.
2650 *a = newstate->wm.ilk.optimal;
2651 a->pipe_enabled |= b->pipe_enabled;
2652 a->sprites_enabled |= b->sprites_enabled;
2653 a->sprites_scaled |= b->sprites_scaled;
2655 for (level = 0; level <= max_level; level++) {
2656 struct intel_wm_level *a_wm = &a->wm[level];
2657 const struct intel_wm_level *b_wm = &b->wm[level];
2659 a_wm->enable &= b_wm->enable;
2660 a_wm->pri_val = max(a_wm->pri_val, b_wm->pri_val);
2661 a_wm->spr_val = max(a_wm->spr_val, b_wm->spr_val);
2662 a_wm->cur_val = max(a_wm->cur_val, b_wm->cur_val);
2663 a_wm->fbc_val = max(a_wm->fbc_val, b_wm->fbc_val);
2667 * We need to make sure that these merged watermark values are
2668 * actually a valid configuration themselves. If they're not,
2669 * there's no safe way to transition from the old state to
2670 * the new state, so we need to fail the atomic transaction.
2672 if (!ilk_validate_pipe_wm(dev, a))
2676 * If our intermediate WM are identical to the final WM, then we can
2677 * omit the post-vblank programming; only update if it's different.
2679 if (memcmp(a, &newstate->wm.ilk.optimal, sizeof(*a)) != 0)
2680 newstate->wm.need_postvbl_update = true;
2686 * Merge the watermarks from all active pipes for a specific level.
2688 static void ilk_merge_wm_level(struct drm_device *dev,
2690 struct intel_wm_level *ret_wm)
2692 const struct intel_crtc *intel_crtc;
2694 ret_wm->enable = true;
2696 for_each_intel_crtc(dev, intel_crtc) {
2697 const struct intel_pipe_wm *active = &intel_crtc->wm.active.ilk;
2698 const struct intel_wm_level *wm = &active->wm[level];
2700 if (!active->pipe_enabled)
2704 * The watermark values may have been used in the past,
2705 * so we must maintain them in the registers for some
2706 * time even if the level is now disabled.
2709 ret_wm->enable = false;
2711 ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val);
2712 ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val);
2713 ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val);
2714 ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val);
2719 * Merge all low power watermarks for all active pipes.
2721 static void ilk_wm_merge(struct drm_device *dev,
2722 const struct intel_wm_config *config,
2723 const struct ilk_wm_maximums *max,
2724 struct intel_pipe_wm *merged)
2726 struct drm_i915_private *dev_priv = to_i915(dev);
2727 int level, max_level = ilk_wm_max_level(dev_priv);
2728 int last_enabled_level = max_level;
2730 /* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */
2731 if ((INTEL_GEN(dev_priv) <= 6 || IS_IVYBRIDGE(dev_priv)) &&
2732 config->num_pipes_active > 1)
2733 last_enabled_level = 0;
2735 /* ILK: FBC WM must be disabled always */
2736 merged->fbc_wm_enabled = INTEL_GEN(dev_priv) >= 6;
2738 /* merge each WM1+ level */
2739 for (level = 1; level <= max_level; level++) {
2740 struct intel_wm_level *wm = &merged->wm[level];
2742 ilk_merge_wm_level(dev, level, wm);
2744 if (level > last_enabled_level)
2746 else if (!ilk_validate_wm_level(level, max, wm))
2747 /* make sure all following levels get disabled */
2748 last_enabled_level = level - 1;
2751 * The spec says it is preferred to disable
2752 * FBC WMs instead of disabling a WM level.
2754 if (wm->fbc_val > max->fbc) {
2756 merged->fbc_wm_enabled = false;
2761 /* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */
2763 * FIXME this is racy. FBC might get enabled later.
2764 * What we should check here is whether FBC can be
2765 * enabled sometime later.
2767 if (IS_GEN5(dev_priv) && !merged->fbc_wm_enabled &&
2768 intel_fbc_is_active(dev_priv)) {
2769 for (level = 2; level <= max_level; level++) {
2770 struct intel_wm_level *wm = &merged->wm[level];
2777 static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm)
2779 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2780 return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable);
2783 /* The value we need to program into the WM_LPx latency field */
2784 static unsigned int ilk_wm_lp_latency(struct drm_device *dev, int level)
2786 struct drm_i915_private *dev_priv = to_i915(dev);
2788 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
2791 return dev_priv->wm.pri_latency[level];
2794 static void ilk_compute_wm_results(struct drm_device *dev,
2795 const struct intel_pipe_wm *merged,
2796 enum intel_ddb_partitioning partitioning,
2797 struct ilk_wm_values *results)
2799 struct drm_i915_private *dev_priv = to_i915(dev);
2800 struct intel_crtc *intel_crtc;
2803 results->enable_fbc_wm = merged->fbc_wm_enabled;
2804 results->partitioning = partitioning;
2806 /* LP1+ register values */
2807 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2808 const struct intel_wm_level *r;
2810 level = ilk_wm_lp_to_level(wm_lp, merged);
2812 r = &merged->wm[level];
2815 * Maintain the watermark values even if the level is
2816 * disabled. Doing otherwise could cause underruns.
2818 results->wm_lp[wm_lp - 1] =
2819 (ilk_wm_lp_latency(dev, level) << WM1_LP_LATENCY_SHIFT) |
2820 (r->pri_val << WM1_LP_SR_SHIFT) |
2824 results->wm_lp[wm_lp - 1] |= WM1_LP_SR_EN;
2826 if (INTEL_GEN(dev_priv) >= 8)
2827 results->wm_lp[wm_lp - 1] |=
2828 r->fbc_val << WM1_LP_FBC_SHIFT_BDW;
2830 results->wm_lp[wm_lp - 1] |=
2831 r->fbc_val << WM1_LP_FBC_SHIFT;
2834 * Always set WM1S_LP_EN when spr_val != 0, even if the
2835 * level is disabled. Doing otherwise could cause underruns.
2837 if (INTEL_GEN(dev_priv) <= 6 && r->spr_val) {
2838 WARN_ON(wm_lp != 1);
2839 results->wm_lp_spr[wm_lp - 1] = WM1S_LP_EN | r->spr_val;
2841 results->wm_lp_spr[wm_lp - 1] = r->spr_val;
2844 /* LP0 register values */
2845 for_each_intel_crtc(dev, intel_crtc) {
2846 enum pipe pipe = intel_crtc->pipe;
2847 const struct intel_wm_level *r =
2848 &intel_crtc->wm.active.ilk.wm[0];
2850 if (WARN_ON(!r->enable))
2853 results->wm_linetime[pipe] = intel_crtc->wm.active.ilk.linetime;
2855 results->wm_pipe[pipe] =
2856 (r->pri_val << WM0_PIPE_PLANE_SHIFT) |
2857 (r->spr_val << WM0_PIPE_SPRITE_SHIFT) |
2862 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2863 * case both are at the same level. Prefer r1 in case they're the same. */
2864 static struct intel_pipe_wm *ilk_find_best_result(struct drm_device *dev,
2865 struct intel_pipe_wm *r1,
2866 struct intel_pipe_wm *r2)
2868 int level, max_level = ilk_wm_max_level(to_i915(dev));
2869 int level1 = 0, level2 = 0;
2871 for (level = 1; level <= max_level; level++) {
2872 if (r1->wm[level].enable)
2874 if (r2->wm[level].enable)
2878 if (level1 == level2) {
2879 if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled)
2883 } else if (level1 > level2) {
2890 /* dirty bits used to track which watermarks need changes */
2891 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2892 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2893 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2894 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2895 #define WM_DIRTY_FBC (1 << 24)
2896 #define WM_DIRTY_DDB (1 << 25)
2898 static unsigned int ilk_compute_wm_dirty(struct drm_i915_private *dev_priv,
2899 const struct ilk_wm_values *old,
2900 const struct ilk_wm_values *new)
2902 unsigned int dirty = 0;
2906 for_each_pipe(dev_priv, pipe) {
2907 if (old->wm_linetime[pipe] != new->wm_linetime[pipe]) {
2908 dirty |= WM_DIRTY_LINETIME(pipe);
2909 /* Must disable LP1+ watermarks too */
2910 dirty |= WM_DIRTY_LP_ALL;
2913 if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) {
2914 dirty |= WM_DIRTY_PIPE(pipe);
2915 /* Must disable LP1+ watermarks too */
2916 dirty |= WM_DIRTY_LP_ALL;
2920 if (old->enable_fbc_wm != new->enable_fbc_wm) {
2921 dirty |= WM_DIRTY_FBC;
2922 /* Must disable LP1+ watermarks too */
2923 dirty |= WM_DIRTY_LP_ALL;
2926 if (old->partitioning != new->partitioning) {
2927 dirty |= WM_DIRTY_DDB;
2928 /* Must disable LP1+ watermarks too */
2929 dirty |= WM_DIRTY_LP_ALL;
2932 /* LP1+ watermarks already deemed dirty, no need to continue */
2933 if (dirty & WM_DIRTY_LP_ALL)
2936 /* Find the lowest numbered LP1+ watermark in need of an update... */
2937 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2938 if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] ||
2939 old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1])
2943 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2944 for (; wm_lp <= 3; wm_lp++)
2945 dirty |= WM_DIRTY_LP(wm_lp);
2950 static bool _ilk_disable_lp_wm(struct drm_i915_private *dev_priv,
2953 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2954 bool changed = false;
2956 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] & WM1_LP_SR_EN) {
2957 previous->wm_lp[2] &= ~WM1_LP_SR_EN;
2958 I915_WRITE(WM3_LP_ILK, previous->wm_lp[2]);
2961 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] & WM1_LP_SR_EN) {
2962 previous->wm_lp[1] &= ~WM1_LP_SR_EN;
2963 I915_WRITE(WM2_LP_ILK, previous->wm_lp[1]);
2966 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] & WM1_LP_SR_EN) {
2967 previous->wm_lp[0] &= ~WM1_LP_SR_EN;
2968 I915_WRITE(WM1_LP_ILK, previous->wm_lp[0]);
2973 * Don't touch WM1S_LP_EN here.
2974 * Doing so could cause underruns.
2981 * The spec says we shouldn't write when we don't need, because every write
2982 * causes WMs to be re-evaluated, expending some power.
2984 static void ilk_write_wm_values(struct drm_i915_private *dev_priv,
2985 struct ilk_wm_values *results)
2987 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2991 dirty = ilk_compute_wm_dirty(dev_priv, previous, results);
2995 _ilk_disable_lp_wm(dev_priv, dirty);
2997 if (dirty & WM_DIRTY_PIPE(PIPE_A))
2998 I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]);
2999 if (dirty & WM_DIRTY_PIPE(PIPE_B))
3000 I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]);
3001 if (dirty & WM_DIRTY_PIPE(PIPE_C))
3002 I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]);
3004 if (dirty & WM_DIRTY_LINETIME(PIPE_A))
3005 I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]);
3006 if (dirty & WM_DIRTY_LINETIME(PIPE_B))
3007 I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]);
3008 if (dirty & WM_DIRTY_LINETIME(PIPE_C))
3009 I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]);
3011 if (dirty & WM_DIRTY_DDB) {
3012 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
3013 val = I915_READ(WM_MISC);
3014 if (results->partitioning == INTEL_DDB_PART_1_2)
3015 val &= ~WM_MISC_DATA_PARTITION_5_6;
3017 val |= WM_MISC_DATA_PARTITION_5_6;
3018 I915_WRITE(WM_MISC, val);
3020 val = I915_READ(DISP_ARB_CTL2);
3021 if (results->partitioning == INTEL_DDB_PART_1_2)
3022 val &= ~DISP_DATA_PARTITION_5_6;
3024 val |= DISP_DATA_PARTITION_5_6;
3025 I915_WRITE(DISP_ARB_CTL2, val);
3029 if (dirty & WM_DIRTY_FBC) {
3030 val = I915_READ(DISP_ARB_CTL);
3031 if (results->enable_fbc_wm)
3032 val &= ~DISP_FBC_WM_DIS;
3034 val |= DISP_FBC_WM_DIS;
3035 I915_WRITE(DISP_ARB_CTL, val);
3038 if (dirty & WM_DIRTY_LP(1) &&
3039 previous->wm_lp_spr[0] != results->wm_lp_spr[0])
3040 I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]);
3042 if (INTEL_GEN(dev_priv) >= 7) {
3043 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1])
3044 I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]);
3045 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2])
3046 I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]);
3049 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != results->wm_lp[0])
3050 I915_WRITE(WM1_LP_ILK, results->wm_lp[0]);
3051 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != results->wm_lp[1])
3052 I915_WRITE(WM2_LP_ILK, results->wm_lp[1]);
3053 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != results->wm_lp[2])
3054 I915_WRITE(WM3_LP_ILK, results->wm_lp[2]);
3056 dev_priv->wm.hw = *results;
3059 bool ilk_disable_lp_wm(struct drm_device *dev)
3061 struct drm_i915_private *dev_priv = to_i915(dev);
3063 return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
3066 #define SKL_SAGV_BLOCK_TIME 30 /* µs */
3069 * FIXME: We still don't have the proper code detect if we need to apply the WA,
3070 * so assume we'll always need it in order to avoid underruns.
3072 static bool skl_needs_memory_bw_wa(struct intel_atomic_state *state)
3074 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
3076 if (IS_GEN9_BC(dev_priv) || IS_BROXTON(dev_priv))
3083 intel_has_sagv(struct drm_i915_private *dev_priv)
3085 if (IS_KABYLAKE(dev_priv))
3088 if (IS_SKYLAKE(dev_priv) &&
3089 dev_priv->sagv_status != I915_SAGV_NOT_CONTROLLED)
3096 * SAGV dynamically adjusts the system agent voltage and clock frequencies
3097 * depending on power and performance requirements. The display engine access
3098 * to system memory is blocked during the adjustment time. Because of the
3099 * blocking time, having this enabled can cause full system hangs and/or pipe
3100 * underruns if we don't meet all of the following requirements:
3102 * - <= 1 pipe enabled
3103 * - All planes can enable watermarks for latencies >= SAGV engine block time
3104 * - We're not using an interlaced display configuration
3107 intel_enable_sagv(struct drm_i915_private *dev_priv)
3111 if (!intel_has_sagv(dev_priv))
3114 if (dev_priv->sagv_status == I915_SAGV_ENABLED)
3117 DRM_DEBUG_KMS("Enabling the SAGV\n");
3118 mutex_lock(&dev_priv->rps.hw_lock);
3120 ret = sandybridge_pcode_write(dev_priv, GEN9_PCODE_SAGV_CONTROL,
3123 /* We don't need to wait for the SAGV when enabling */
3124 mutex_unlock(&dev_priv->rps.hw_lock);
3127 * Some skl systems, pre-release machines in particular,
3128 * don't actually have an SAGV.
3130 if (IS_SKYLAKE(dev_priv) && ret == -ENXIO) {
3131 DRM_DEBUG_DRIVER("No SAGV found on system, ignoring\n");
3132 dev_priv->sagv_status = I915_SAGV_NOT_CONTROLLED;
3134 } else if (ret < 0) {
3135 DRM_ERROR("Failed to enable the SAGV\n");
3139 dev_priv->sagv_status = I915_SAGV_ENABLED;
3144 intel_disable_sagv(struct drm_i915_private *dev_priv)
3148 if (!intel_has_sagv(dev_priv))
3151 if (dev_priv->sagv_status == I915_SAGV_DISABLED)
3154 DRM_DEBUG_KMS("Disabling the SAGV\n");
3155 mutex_lock(&dev_priv->rps.hw_lock);
3157 /* bspec says to keep retrying for at least 1 ms */
3158 ret = skl_pcode_request(dev_priv, GEN9_PCODE_SAGV_CONTROL,
3160 GEN9_SAGV_IS_DISABLED, GEN9_SAGV_IS_DISABLED,
3162 mutex_unlock(&dev_priv->rps.hw_lock);
3165 * Some skl systems, pre-release machines in particular,
3166 * don't actually have an SAGV.
3168 if (IS_SKYLAKE(dev_priv) && ret == -ENXIO) {
3169 DRM_DEBUG_DRIVER("No SAGV found on system, ignoring\n");
3170 dev_priv->sagv_status = I915_SAGV_NOT_CONTROLLED;
3172 } else if (ret < 0) {
3173 DRM_ERROR("Failed to disable the SAGV (%d)\n", ret);
3177 dev_priv->sagv_status = I915_SAGV_DISABLED;
3181 bool intel_can_enable_sagv(struct drm_atomic_state *state)
3183 struct drm_device *dev = state->dev;
3184 struct drm_i915_private *dev_priv = to_i915(dev);
3185 struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
3186 struct intel_crtc *crtc;
3187 struct intel_plane *plane;
3188 struct intel_crtc_state *cstate;
3192 if (!intel_has_sagv(dev_priv))
3196 * SKL workaround: bspec recommends we disable the SAGV when we have
3197 * more then one pipe enabled
3199 * If there are no active CRTCs, no additional checks need be performed
3201 if (hweight32(intel_state->active_crtcs) == 0)
3203 else if (hweight32(intel_state->active_crtcs) > 1)
3206 /* Since we're now guaranteed to only have one active CRTC... */
3207 pipe = ffs(intel_state->active_crtcs) - 1;
3208 crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
3209 cstate = to_intel_crtc_state(crtc->base.state);
3211 if (crtc->base.state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
3214 for_each_intel_plane_on_crtc(dev, crtc, plane) {
3215 struct skl_plane_wm *wm =
3216 &cstate->wm.skl.optimal.planes[plane->id];
3218 /* Skip this plane if it's not enabled */
3219 if (!wm->wm[0].plane_en)
3222 /* Find the highest enabled wm level for this plane */
3223 for (level = ilk_wm_max_level(dev_priv);
3224 !wm->wm[level].plane_en; --level)
3227 latency = dev_priv->wm.skl_latency[level];
3229 if (skl_needs_memory_bw_wa(intel_state) &&
3230 plane->base.state->fb->modifier ==
3231 I915_FORMAT_MOD_X_TILED)
3235 * If any of the planes on this pipe don't enable wm levels
3236 * that incur memory latencies higher then 30µs we can't enable
3239 if (latency < SKL_SAGV_BLOCK_TIME)
3247 skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
3248 const struct intel_crtc_state *cstate,
3249 struct skl_ddb_entry *alloc, /* out */
3250 int *num_active /* out */)
3252 struct drm_atomic_state *state = cstate->base.state;
3253 struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
3254 struct drm_i915_private *dev_priv = to_i915(dev);
3255 struct drm_crtc *for_crtc = cstate->base.crtc;
3256 unsigned int pipe_size, ddb_size;
3257 int nth_active_pipe;
3259 if (WARN_ON(!state) || !cstate->base.active) {
3262 *num_active = hweight32(dev_priv->active_crtcs);
3266 if (intel_state->active_pipe_changes)
3267 *num_active = hweight32(intel_state->active_crtcs);
3269 *num_active = hweight32(dev_priv->active_crtcs);
3271 ddb_size = INTEL_INFO(dev_priv)->ddb_size;
3272 WARN_ON(ddb_size == 0);
3274 ddb_size -= 4; /* 4 blocks for bypass path allocation */
3277 * If the state doesn't change the active CRTC's, then there's
3278 * no need to recalculate; the existing pipe allocation limits
3279 * should remain unchanged. Note that we're safe from racing
3280 * commits since any racing commit that changes the active CRTC
3281 * list would need to grab _all_ crtc locks, including the one
3282 * we currently hold.
3284 if (!intel_state->active_pipe_changes) {
3286 * alloc may be cleared by clear_intel_crtc_state,
3287 * copy from old state to be sure
3289 *alloc = to_intel_crtc_state(for_crtc->state)->wm.skl.ddb;
3293 nth_active_pipe = hweight32(intel_state->active_crtcs &
3294 (drm_crtc_mask(for_crtc) - 1));
3295 pipe_size = ddb_size / hweight32(intel_state->active_crtcs);
3296 alloc->start = nth_active_pipe * ddb_size / *num_active;
3297 alloc->end = alloc->start + pipe_size;
3300 static unsigned int skl_cursor_allocation(int num_active)
3302 if (num_active == 1)
3308 static void skl_ddb_entry_init_from_hw(struct skl_ddb_entry *entry, u32 reg)
3310 entry->start = reg & 0x3ff;
3311 entry->end = (reg >> 16) & 0x3ff;
3316 void skl_ddb_get_hw_state(struct drm_i915_private *dev_priv,
3317 struct skl_ddb_allocation *ddb /* out */)
3319 struct intel_crtc *crtc;
3321 memset(ddb, 0, sizeof(*ddb));
3323 for_each_intel_crtc(&dev_priv->drm, crtc) {
3324 enum intel_display_power_domain power_domain;
3325 enum plane_id plane_id;
3326 enum pipe pipe = crtc->pipe;
3328 power_domain = POWER_DOMAIN_PIPE(pipe);
3329 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
3332 for_each_plane_id_on_crtc(crtc, plane_id) {
3335 if (plane_id != PLANE_CURSOR)
3336 val = I915_READ(PLANE_BUF_CFG(pipe, plane_id));
3338 val = I915_READ(CUR_BUF_CFG(pipe));
3340 skl_ddb_entry_init_from_hw(&ddb->plane[pipe][plane_id], val);
3343 intel_display_power_put(dev_priv, power_domain);
3348 * Determines the downscale amount of a plane for the purposes of watermark calculations.
3349 * The bspec defines downscale amount as:
3352 * Horizontal down scale amount = maximum[1, Horizontal source size /
3353 * Horizontal destination size]
3354 * Vertical down scale amount = maximum[1, Vertical source size /
3355 * Vertical destination size]
3356 * Total down scale amount = Horizontal down scale amount *
3357 * Vertical down scale amount
3360 * Return value is provided in 16.16 fixed point form to retain fractional part.
3361 * Caller should take care of dividing & rounding off the value.
3364 skl_plane_downscale_amount(const struct intel_crtc_state *cstate,
3365 const struct intel_plane_state *pstate)
3367 struct intel_plane *plane = to_intel_plane(pstate->base.plane);
3368 uint32_t downscale_h, downscale_w;
3369 uint32_t src_w, src_h, dst_w, dst_h;
3371 if (WARN_ON(!intel_wm_plane_visible(cstate, pstate)))
3372 return DRM_PLANE_HELPER_NO_SCALING;
3374 /* n.b., src is 16.16 fixed point, dst is whole integer */
3375 if (plane->id == PLANE_CURSOR) {
3376 src_w = pstate->base.src_w;
3377 src_h = pstate->base.src_h;
3378 dst_w = pstate->base.crtc_w;
3379 dst_h = pstate->base.crtc_h;
3381 src_w = drm_rect_width(&pstate->base.src);
3382 src_h = drm_rect_height(&pstate->base.src);
3383 dst_w = drm_rect_width(&pstate->base.dst);
3384 dst_h = drm_rect_height(&pstate->base.dst);
3387 if (drm_rotation_90_or_270(pstate->base.rotation))
3390 downscale_h = max(src_h / dst_h, (uint32_t)DRM_PLANE_HELPER_NO_SCALING);
3391 downscale_w = max(src_w / dst_w, (uint32_t)DRM_PLANE_HELPER_NO_SCALING);
3393 /* Provide result in 16.16 fixed point */
3394 return (uint64_t)downscale_w * downscale_h >> 16;
3398 skl_plane_relative_data_rate(const struct intel_crtc_state *cstate,
3399 const struct drm_plane_state *pstate,
3402 struct intel_plane *plane = to_intel_plane(pstate->plane);
3403 struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate);
3404 uint32_t down_scale_amount, data_rate;
3405 uint32_t width = 0, height = 0;
3406 struct drm_framebuffer *fb;
3409 if (!intel_pstate->base.visible)
3413 format = fb->format->format;
3415 if (plane->id == PLANE_CURSOR)
3417 if (y && format != DRM_FORMAT_NV12)
3420 width = drm_rect_width(&intel_pstate->base.src) >> 16;
3421 height = drm_rect_height(&intel_pstate->base.src) >> 16;
3423 if (drm_rotation_90_or_270(pstate->rotation))
3424 swap(width, height);
3426 /* for planar format */
3427 if (format == DRM_FORMAT_NV12) {
3428 if (y) /* y-plane data rate */
3429 data_rate = width * height *
3431 else /* uv-plane data rate */
3432 data_rate = (width / 2) * (height / 2) *
3435 /* for packed formats */
3436 data_rate = width * height * fb->format->cpp[0];
3439 down_scale_amount = skl_plane_downscale_amount(cstate, intel_pstate);
3441 return (uint64_t)data_rate * down_scale_amount >> 16;
3445 * We don't overflow 32 bits. Worst case is 3 planes enabled, each fetching
3446 * a 8192x4096@32bpp framebuffer:
3447 * 3 * 4096 * 8192 * 4 < 2^32
3450 skl_get_total_relative_data_rate(struct intel_crtc_state *intel_cstate,
3451 unsigned *plane_data_rate,
3452 unsigned *plane_y_data_rate)
3454 struct drm_crtc_state *cstate = &intel_cstate->base;
3455 struct drm_atomic_state *state = cstate->state;
3456 struct drm_plane *plane;
3457 const struct drm_plane_state *pstate;
3458 unsigned int total_data_rate = 0;
3460 if (WARN_ON(!state))
3463 /* Calculate and cache data rate for each plane */
3464 drm_atomic_crtc_state_for_each_plane_state(plane, pstate, cstate) {
3465 enum plane_id plane_id = to_intel_plane(plane)->id;
3469 rate = skl_plane_relative_data_rate(intel_cstate,
3471 plane_data_rate[plane_id] = rate;
3473 total_data_rate += rate;
3476 rate = skl_plane_relative_data_rate(intel_cstate,
3478 plane_y_data_rate[plane_id] = rate;
3480 total_data_rate += rate;
3483 return total_data_rate;
3487 skl_ddb_min_alloc(const struct drm_plane_state *pstate,
3490 struct drm_framebuffer *fb = pstate->fb;
3491 struct intel_plane_state *intel_pstate = to_intel_plane_state(pstate);
3492 uint32_t src_w, src_h;
3493 uint32_t min_scanlines = 8;
3499 /* For packed formats, no y-plane, return 0 */
3500 if (y && fb->format->format != DRM_FORMAT_NV12)
3503 /* For Non Y-tile return 8-blocks */
3504 if (fb->modifier != I915_FORMAT_MOD_Y_TILED &&
3505 fb->modifier != I915_FORMAT_MOD_Yf_TILED)
3508 src_w = drm_rect_width(&intel_pstate->base.src) >> 16;
3509 src_h = drm_rect_height(&intel_pstate->base.src) >> 16;
3511 if (drm_rotation_90_or_270(pstate->rotation))
3514 /* Halve UV plane width and height for NV12 */
3515 if (fb->format->format == DRM_FORMAT_NV12 && !y) {
3520 if (fb->format->format == DRM_FORMAT_NV12 && !y)
3521 plane_bpp = fb->format->cpp[1];
3523 plane_bpp = fb->format->cpp[0];
3525 if (drm_rotation_90_or_270(pstate->rotation)) {
3526 switch (plane_bpp) {
3540 WARN(1, "Unsupported pixel depth %u for rotation",
3546 return DIV_ROUND_UP((4 * src_w * plane_bpp), 512) * min_scanlines/4 + 3;
3550 skl_ddb_calc_min(const struct intel_crtc_state *cstate, int num_active,
3551 uint16_t *minimum, uint16_t *y_minimum)
3553 const struct drm_plane_state *pstate;
3554 struct drm_plane *plane;
3556 drm_atomic_crtc_state_for_each_plane_state(plane, pstate, &cstate->base) {
3557 enum plane_id plane_id = to_intel_plane(plane)->id;
3559 if (plane_id == PLANE_CURSOR)
3562 if (!pstate->visible)
3565 minimum[plane_id] = skl_ddb_min_alloc(pstate, 0);
3566 y_minimum[plane_id] = skl_ddb_min_alloc(pstate, 1);
3569 minimum[PLANE_CURSOR] = skl_cursor_allocation(num_active);
3573 skl_allocate_pipe_ddb(struct intel_crtc_state *cstate,
3574 struct skl_ddb_allocation *ddb /* out */)
3576 struct drm_atomic_state *state = cstate->base.state;
3577 struct drm_crtc *crtc = cstate->base.crtc;
3578 struct drm_device *dev = crtc->dev;
3579 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3580 enum pipe pipe = intel_crtc->pipe;
3581 struct skl_ddb_entry *alloc = &cstate->wm.skl.ddb;
3582 uint16_t alloc_size, start;
3583 uint16_t minimum[I915_MAX_PLANES] = {};
3584 uint16_t y_minimum[I915_MAX_PLANES] = {};
3585 unsigned int total_data_rate;
3586 enum plane_id plane_id;
3588 unsigned plane_data_rate[I915_MAX_PLANES] = {};
3589 unsigned plane_y_data_rate[I915_MAX_PLANES] = {};
3591 /* Clear the partitioning for disabled planes. */
3592 memset(ddb->plane[pipe], 0, sizeof(ddb->plane[pipe]));
3593 memset(ddb->y_plane[pipe], 0, sizeof(ddb->y_plane[pipe]));
3595 if (WARN_ON(!state))
3598 if (!cstate->base.active) {
3599 alloc->start = alloc->end = 0;
3603 skl_ddb_get_pipe_allocation_limits(dev, cstate, alloc, &num_active);
3604 alloc_size = skl_ddb_entry_size(alloc);
3605 if (alloc_size == 0) {
3606 memset(ddb->plane[pipe], 0, sizeof(ddb->plane[pipe]));
3610 skl_ddb_calc_min(cstate, num_active, minimum, y_minimum);
3613 * 1. Allocate the mininum required blocks for each active plane
3614 * and allocate the cursor, it doesn't require extra allocation
3615 * proportional to the data rate.
3618 for_each_plane_id_on_crtc(intel_crtc, plane_id) {
3619 alloc_size -= minimum[plane_id];
3620 alloc_size -= y_minimum[plane_id];
3623 ddb->plane[pipe][PLANE_CURSOR].start = alloc->end - minimum[PLANE_CURSOR];
3624 ddb->plane[pipe][PLANE_CURSOR].end = alloc->end;
3627 * 2. Distribute the remaining space in proportion to the amount of
3628 * data each plane needs to fetch from memory.
3630 * FIXME: we may not allocate every single block here.
3632 total_data_rate = skl_get_total_relative_data_rate(cstate,
3635 if (total_data_rate == 0)
3638 start = alloc->start;
3639 for_each_plane_id_on_crtc(intel_crtc, plane_id) {
3640 unsigned int data_rate, y_data_rate;
3641 uint16_t plane_blocks, y_plane_blocks = 0;
3643 if (plane_id == PLANE_CURSOR)
3646 data_rate = plane_data_rate[plane_id];
3649 * allocation for (packed formats) or (uv-plane part of planar format):
3650 * promote the expression to 64 bits to avoid overflowing, the
3651 * result is < available as data_rate / total_data_rate < 1
3653 plane_blocks = minimum[plane_id];
3654 plane_blocks += div_u64((uint64_t)alloc_size * data_rate,
3657 /* Leave disabled planes at (0,0) */
3659 ddb->plane[pipe][plane_id].start = start;
3660 ddb->plane[pipe][plane_id].end = start + plane_blocks;
3663 start += plane_blocks;
3666 * allocation for y_plane part of planar format:
3668 y_data_rate = plane_y_data_rate[plane_id];
3670 y_plane_blocks = y_minimum[plane_id];
3671 y_plane_blocks += div_u64((uint64_t)alloc_size * y_data_rate,
3675 ddb->y_plane[pipe][plane_id].start = start;
3676 ddb->y_plane[pipe][plane_id].end = start + y_plane_blocks;
3679 start += y_plane_blocks;
3686 * The max latency should be 257 (max the punit can code is 255 and we add 2us
3687 * for the read latency) and cpp should always be <= 8, so that
3688 * should allow pixel_rate up to ~2 GHz which seems sufficient since max
3689 * 2xcdclk is 1350 MHz and the pixel rate should never exceed that.
3691 static uint_fixed_16_16_t skl_wm_method1(uint32_t pixel_rate, uint8_t cpp,
3694 uint32_t wm_intermediate_val;
3695 uint_fixed_16_16_t ret;
3698 return FP_16_16_MAX;
3700 wm_intermediate_val = latency * pixel_rate * cpp;
3701 ret = fixed_16_16_div_round_up_u64(wm_intermediate_val, 1000 * 512);
3705 static uint_fixed_16_16_t skl_wm_method2(uint32_t pixel_rate,
3706 uint32_t pipe_htotal,
3708 uint_fixed_16_16_t plane_blocks_per_line)
3710 uint32_t wm_intermediate_val;
3711 uint_fixed_16_16_t ret;
3714 return FP_16_16_MAX;
3716 wm_intermediate_val = latency * pixel_rate;
3717 wm_intermediate_val = DIV_ROUND_UP(wm_intermediate_val,
3718 pipe_htotal * 1000);
3719 ret = mul_u32_fixed_16_16(wm_intermediate_val, plane_blocks_per_line);
3723 static uint32_t skl_adjusted_plane_pixel_rate(const struct intel_crtc_state *cstate,
3724 struct intel_plane_state *pstate)
3726 uint64_t adjusted_pixel_rate;
3727 uint64_t downscale_amount;
3728 uint64_t pixel_rate;
3730 /* Shouldn't reach here on disabled planes... */
3731 if (WARN_ON(!intel_wm_plane_visible(cstate, pstate)))
3735 * Adjusted plane pixel rate is just the pipe's adjusted pixel rate
3736 * with additional adjustments for plane-specific scaling.
3738 adjusted_pixel_rate = cstate->pixel_rate;
3739 downscale_amount = skl_plane_downscale_amount(cstate, pstate);
3741 pixel_rate = adjusted_pixel_rate * downscale_amount >> 16;
3742 WARN_ON(pixel_rate != clamp_t(uint32_t, pixel_rate, 0, ~0));
3747 static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
3748 struct intel_crtc_state *cstate,
3749 struct intel_plane_state *intel_pstate,
3750 uint16_t ddb_allocation,
3752 uint16_t *out_blocks, /* out */
3753 uint8_t *out_lines, /* out */
3754 bool *enabled /* out */)
3756 struct intel_plane *plane = to_intel_plane(intel_pstate->base.plane);
3757 struct drm_plane_state *pstate = &intel_pstate->base;
3758 struct drm_framebuffer *fb = pstate->fb;
3759 uint32_t latency = dev_priv->wm.skl_latency[level];
3760 uint_fixed_16_16_t method1, method2;
3761 uint_fixed_16_16_t plane_blocks_per_line;
3762 uint_fixed_16_16_t selected_result;
3763 uint32_t interm_pbpl;
3764 uint32_t plane_bytes_per_line;
3765 uint32_t res_blocks, res_lines;
3767 uint32_t width = 0, height = 0;
3768 uint32_t plane_pixel_rate;
3769 uint_fixed_16_16_t y_tile_minimum;
3770 uint32_t y_min_scanlines;
3771 struct intel_atomic_state *state =
3772 to_intel_atomic_state(cstate->base.state);
3773 bool apply_memory_bw_wa = skl_needs_memory_bw_wa(state);
3774 bool y_tiled, x_tiled;
3777 !intel_wm_plane_visible(cstate, intel_pstate)) {
3782 y_tiled = fb->modifier == I915_FORMAT_MOD_Y_TILED ||
3783 fb->modifier == I915_FORMAT_MOD_Yf_TILED;
3784 x_tiled = fb->modifier == I915_FORMAT_MOD_X_TILED;
3786 /* Display WA #1141: kbl. */
3787 if (IS_KABYLAKE(dev_priv) && dev_priv->ipc_enabled)
3790 if (apply_memory_bw_wa && x_tiled)
3793 if (plane->id == PLANE_CURSOR) {
3794 width = intel_pstate->base.crtc_w;
3795 height = intel_pstate->base.crtc_h;
3797 width = drm_rect_width(&intel_pstate->base.src) >> 16;
3798 height = drm_rect_height(&intel_pstate->base.src) >> 16;
3801 if (drm_rotation_90_or_270(pstate->rotation))
3802 swap(width, height);
3804 cpp = fb->format->cpp[0];
3805 plane_pixel_rate = skl_adjusted_plane_pixel_rate(cstate, intel_pstate);
3807 if (drm_rotation_90_or_270(pstate->rotation)) {
3808 int cpp = (fb->format->format == DRM_FORMAT_NV12) ?
3809 fb->format->cpp[1] :
3814 y_min_scanlines = 16;
3817 y_min_scanlines = 8;
3820 y_min_scanlines = 4;
3827 y_min_scanlines = 4;
3830 if (apply_memory_bw_wa)
3831 y_min_scanlines *= 2;
3833 plane_bytes_per_line = width * cpp;
3835 interm_pbpl = DIV_ROUND_UP(plane_bytes_per_line *
3836 y_min_scanlines, 512);
3837 plane_blocks_per_line =
3838 fixed_16_16_div_round_up(interm_pbpl, y_min_scanlines);
3839 } else if (x_tiled) {
3840 interm_pbpl = DIV_ROUND_UP(plane_bytes_per_line, 512);
3841 plane_blocks_per_line = u32_to_fixed_16_16(interm_pbpl);
3843 interm_pbpl = DIV_ROUND_UP(plane_bytes_per_line, 512) + 1;
3844 plane_blocks_per_line = u32_to_fixed_16_16(interm_pbpl);
3847 method1 = skl_wm_method1(plane_pixel_rate, cpp, latency);
3848 method2 = skl_wm_method2(plane_pixel_rate,
3849 cstate->base.adjusted_mode.crtc_htotal,
3851 plane_blocks_per_line);
3853 y_tile_minimum = mul_u32_fixed_16_16(y_min_scanlines,
3854 plane_blocks_per_line);
3857 selected_result = max_fixed_16_16(method2, y_tile_minimum);
3859 if ((cpp * cstate->base.adjusted_mode.crtc_htotal / 512 < 1) &&
3860 (plane_bytes_per_line / 512 < 1))
3861 selected_result = method2;
3862 else if ((ddb_allocation /
3863 fixed_16_16_to_u32_round_up(plane_blocks_per_line)) >= 1)
3864 selected_result = min_fixed_16_16(method1, method2);
3866 selected_result = method1;
3869 res_blocks = fixed_16_16_to_u32_round_up(selected_result) + 1;
3870 res_lines = DIV_ROUND_UP(selected_result.val,
3871 plane_blocks_per_line.val);
3873 if (level >= 1 && level <= 7) {
3875 res_blocks += fixed_16_16_to_u32_round_up(y_tile_minimum);
3876 res_lines += y_min_scanlines;
3882 if (res_blocks >= ddb_allocation || res_lines > 31) {
3886 * If there are no valid level 0 watermarks, then we can't
3887 * support this display configuration.
3892 struct drm_plane *plane = pstate->plane;
3894 DRM_DEBUG_KMS("Requested display configuration exceeds system watermark limitations\n");
3895 DRM_DEBUG_KMS("[PLANE:%d:%s] blocks required = %u/%u, lines required = %u/31\n",
3896 plane->base.id, plane->name,
3897 res_blocks, ddb_allocation, res_lines);
3902 *out_blocks = res_blocks;
3903 *out_lines = res_lines;
3910 skl_compute_wm_level(const struct drm_i915_private *dev_priv,
3911 struct skl_ddb_allocation *ddb,
3912 struct intel_crtc_state *cstate,
3913 struct intel_plane *intel_plane,
3915 struct skl_wm_level *result)
3917 struct drm_atomic_state *state = cstate->base.state;
3918 struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
3919 struct drm_plane *plane = &intel_plane->base;
3920 struct intel_plane_state *intel_pstate = NULL;
3921 uint16_t ddb_blocks;
3922 enum pipe pipe = intel_crtc->pipe;
3927 intel_atomic_get_existing_plane_state(state,
3931 * Note: If we start supporting multiple pending atomic commits against
3932 * the same planes/CRTC's in the future, plane->state will no longer be
3933 * the correct pre-state to use for the calculations here and we'll
3934 * need to change where we get the 'unchanged' plane data from.
3936 * For now this is fine because we only allow one queued commit against
3937 * a CRTC. Even if the plane isn't modified by this transaction and we
3938 * don't have a plane lock, we still have the CRTC's lock, so we know
3939 * that no other transactions are racing with us to update it.
3942 intel_pstate = to_intel_plane_state(plane->state);
3944 WARN_ON(!intel_pstate->base.fb);
3946 ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][intel_plane->id]);
3948 ret = skl_compute_plane_wm(dev_priv,
3953 &result->plane_res_b,
3954 &result->plane_res_l,
3963 skl_compute_linetime_wm(struct intel_crtc_state *cstate)
3965 struct drm_atomic_state *state = cstate->base.state;
3966 struct drm_i915_private *dev_priv = to_i915(state->dev);
3967 uint32_t pixel_rate;
3968 uint32_t linetime_wm;
3970 if (!cstate->base.active)
3973 pixel_rate = cstate->pixel_rate;
3975 if (WARN_ON(pixel_rate == 0))
3978 linetime_wm = DIV_ROUND_UP(8 * cstate->base.adjusted_mode.crtc_htotal *
3981 /* Display WA #1135: bxt. */
3982 if (IS_BROXTON(dev_priv) && dev_priv->ipc_enabled)
3983 linetime_wm = DIV_ROUND_UP(linetime_wm, 2);
3988 static void skl_compute_transition_wm(struct intel_crtc_state *cstate,
3989 struct skl_wm_level *trans_wm /* out */)
3991 if (!cstate->base.active)
3994 /* Until we know more, just disable transition WMs */
3995 trans_wm->plane_en = false;
3998 static int skl_build_pipe_wm(struct intel_crtc_state *cstate,
3999 struct skl_ddb_allocation *ddb,
4000 struct skl_pipe_wm *pipe_wm)
4002 struct drm_device *dev = cstate->base.crtc->dev;
4003 const struct drm_i915_private *dev_priv = to_i915(dev);
4004 struct intel_plane *intel_plane;
4005 struct skl_plane_wm *wm;
4006 int level, max_level = ilk_wm_max_level(dev_priv);
4010 * We'll only calculate watermarks for planes that are actually
4011 * enabled, so make sure all other planes are set as disabled.
4013 memset(pipe_wm->planes, 0, sizeof(pipe_wm->planes));
4015 for_each_intel_plane_mask(&dev_priv->drm,
4017 cstate->base.plane_mask) {
4018 wm = &pipe_wm->planes[intel_plane->id];
4020 for (level = 0; level <= max_level; level++) {
4021 ret = skl_compute_wm_level(dev_priv, ddb, cstate,
4027 skl_compute_transition_wm(cstate, &wm->trans_wm);
4029 pipe_wm->linetime = skl_compute_linetime_wm(cstate);
4034 static void skl_ddb_entry_write(struct drm_i915_private *dev_priv,
4036 const struct skl_ddb_entry *entry)
4039 I915_WRITE(reg, (entry->end - 1) << 16 | entry->start);
4044 static void skl_write_wm_level(struct drm_i915_private *dev_priv,
4046 const struct skl_wm_level *level)
4050 if (level->plane_en) {
4052 val |= level->plane_res_b;
4053 val |= level->plane_res_l << PLANE_WM_LINES_SHIFT;
4056 I915_WRITE(reg, val);
4059 static void skl_write_plane_wm(struct intel_crtc *intel_crtc,
4060 const struct skl_plane_wm *wm,
4061 const struct skl_ddb_allocation *ddb,
4062 enum plane_id plane_id)
4064 struct drm_crtc *crtc = &intel_crtc->base;
4065 struct drm_device *dev = crtc->dev;
4066 struct drm_i915_private *dev_priv = to_i915(dev);
4067 int level, max_level = ilk_wm_max_level(dev_priv);
4068 enum pipe pipe = intel_crtc->pipe;
4070 for (level = 0; level <= max_level; level++) {
4071 skl_write_wm_level(dev_priv, PLANE_WM(pipe, plane_id, level),
4074 skl_write_wm_level(dev_priv, PLANE_WM_TRANS(pipe, plane_id),
4077 skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane_id),
4078 &ddb->plane[pipe][plane_id]);
4079 skl_ddb_entry_write(dev_priv, PLANE_NV12_BUF_CFG(pipe, plane_id),
4080 &ddb->y_plane[pipe][plane_id]);
4083 static void skl_write_cursor_wm(struct intel_crtc *intel_crtc,
4084 const struct skl_plane_wm *wm,
4085 const struct skl_ddb_allocation *ddb)
4087 struct drm_crtc *crtc = &intel_crtc->base;
4088 struct drm_device *dev = crtc->dev;
4089 struct drm_i915_private *dev_priv = to_i915(dev);
4090 int level, max_level = ilk_wm_max_level(dev_priv);
4091 enum pipe pipe = intel_crtc->pipe;
4093 for (level = 0; level <= max_level; level++) {
4094 skl_write_wm_level(dev_priv, CUR_WM(pipe, level),
4097 skl_write_wm_level(dev_priv, CUR_WM_TRANS(pipe), &wm->trans_wm);
4099 skl_ddb_entry_write(dev_priv, CUR_BUF_CFG(pipe),
4100 &ddb->plane[pipe][PLANE_CURSOR]);
4103 bool skl_wm_level_equals(const struct skl_wm_level *l1,
4104 const struct skl_wm_level *l2)
4106 if (l1->plane_en != l2->plane_en)
4109 /* If both planes aren't enabled, the rest shouldn't matter */
4113 return (l1->plane_res_l == l2->plane_res_l &&
4114 l1->plane_res_b == l2->plane_res_b);
4117 static inline bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,
4118 const struct skl_ddb_entry *b)
4120 return a->start < b->end && b->start < a->end;
4123 bool skl_ddb_allocation_overlaps(const struct skl_ddb_entry **entries,
4124 const struct skl_ddb_entry *ddb,
4129 for (i = 0; i < I915_MAX_PIPES; i++)
4130 if (i != ignore && entries[i] &&
4131 skl_ddb_entries_overlap(ddb, entries[i]))
4137 static int skl_update_pipe_wm(struct drm_crtc_state *cstate,
4138 const struct skl_pipe_wm *old_pipe_wm,
4139 struct skl_pipe_wm *pipe_wm, /* out */
4140 struct skl_ddb_allocation *ddb, /* out */
4141 bool *changed /* out */)
4143 struct intel_crtc_state *intel_cstate = to_intel_crtc_state(cstate);
4146 ret = skl_build_pipe_wm(intel_cstate, ddb, pipe_wm);
4150 if (!memcmp(old_pipe_wm, pipe_wm, sizeof(*pipe_wm)))
4159 pipes_modified(struct drm_atomic_state *state)
4161 struct drm_crtc *crtc;
4162 struct drm_crtc_state *cstate;
4163 uint32_t i, ret = 0;
4165 for_each_new_crtc_in_state(state, crtc, cstate, i)
4166 ret |= drm_crtc_mask(crtc);
4172 skl_ddb_add_affected_planes(struct intel_crtc_state *cstate)
4174 struct drm_atomic_state *state = cstate->base.state;
4175 struct drm_device *dev = state->dev;
4176 struct drm_crtc *crtc = cstate->base.crtc;
4177 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4178 struct drm_i915_private *dev_priv = to_i915(dev);
4179 struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
4180 struct skl_ddb_allocation *new_ddb = &intel_state->wm_results.ddb;
4181 struct skl_ddb_allocation *cur_ddb = &dev_priv->wm.skl_hw.ddb;
4182 struct drm_plane_state *plane_state;
4183 struct drm_plane *plane;
4184 enum pipe pipe = intel_crtc->pipe;
4186 WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc));
4188 drm_for_each_plane_mask(plane, dev, cstate->base.plane_mask) {
4189 enum plane_id plane_id = to_intel_plane(plane)->id;
4191 if (skl_ddb_entry_equal(&cur_ddb->plane[pipe][plane_id],
4192 &new_ddb->plane[pipe][plane_id]) &&
4193 skl_ddb_entry_equal(&cur_ddb->y_plane[pipe][plane_id],
4194 &new_ddb->y_plane[pipe][plane_id]))
4197 plane_state = drm_atomic_get_plane_state(state, plane);
4198 if (IS_ERR(plane_state))
4199 return PTR_ERR(plane_state);
4206 skl_compute_ddb(struct drm_atomic_state *state)
4208 struct drm_device *dev = state->dev;
4209 struct drm_i915_private *dev_priv = to_i915(dev);
4210 struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
4211 struct intel_crtc *intel_crtc;
4212 struct skl_ddb_allocation *ddb = &intel_state->wm_results.ddb;
4213 uint32_t realloc_pipes = pipes_modified(state);
4217 * If this is our first atomic update following hardware readout,
4218 * we can't trust the DDB that the BIOS programmed for us. Let's
4219 * pretend that all pipes switched active status so that we'll
4220 * ensure a full DDB recompute.
4222 if (dev_priv->wm.distrust_bios_wm) {
4223 ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
4224 state->acquire_ctx);
4228 intel_state->active_pipe_changes = ~0;
4231 * We usually only initialize intel_state->active_crtcs if we
4232 * we're doing a modeset; make sure this field is always
4233 * initialized during the sanitization process that happens
4234 * on the first commit too.
4236 if (!intel_state->modeset)
4237 intel_state->active_crtcs = dev_priv->active_crtcs;
4241 * If the modeset changes which CRTC's are active, we need to
4242 * recompute the DDB allocation for *all* active pipes, even
4243 * those that weren't otherwise being modified in any way by this
4244 * atomic commit. Due to the shrinking of the per-pipe allocations
4245 * when new active CRTC's are added, it's possible for a pipe that
4246 * we were already using and aren't changing at all here to suddenly
4247 * become invalid if its DDB needs exceeds its new allocation.
4249 * Note that if we wind up doing a full DDB recompute, we can't let
4250 * any other display updates race with this transaction, so we need
4251 * to grab the lock on *all* CRTC's.
4253 if (intel_state->active_pipe_changes) {
4255 intel_state->wm_results.dirty_pipes = ~0;
4259 * We're not recomputing for the pipes not included in the commit, so
4260 * make sure we start with the current state.
4262 memcpy(ddb, &dev_priv->wm.skl_hw.ddb, sizeof(*ddb));
4264 for_each_intel_crtc_mask(dev, intel_crtc, realloc_pipes) {
4265 struct intel_crtc_state *cstate;
4267 cstate = intel_atomic_get_crtc_state(state, intel_crtc);
4269 return PTR_ERR(cstate);
4271 ret = skl_allocate_pipe_ddb(cstate, ddb);
4275 ret = skl_ddb_add_affected_planes(cstate);
4284 skl_copy_wm_for_pipe(struct skl_wm_values *dst,
4285 struct skl_wm_values *src,
4288 memcpy(dst->ddb.y_plane[pipe], src->ddb.y_plane[pipe],
4289 sizeof(dst->ddb.y_plane[pipe]));
4290 memcpy(dst->ddb.plane[pipe], src->ddb.plane[pipe],
4291 sizeof(dst->ddb.plane[pipe]));
4295 skl_print_wm_changes(const struct drm_atomic_state *state)
4297 const struct drm_device *dev = state->dev;
4298 const struct drm_i915_private *dev_priv = to_i915(dev);
4299 const struct intel_atomic_state *intel_state =
4300 to_intel_atomic_state(state);
4301 const struct drm_crtc *crtc;
4302 const struct drm_crtc_state *cstate;
4303 const struct intel_plane *intel_plane;
4304 const struct skl_ddb_allocation *old_ddb = &dev_priv->wm.skl_hw.ddb;
4305 const struct skl_ddb_allocation *new_ddb = &intel_state->wm_results.ddb;
4308 for_each_new_crtc_in_state(state, crtc, cstate, i) {
4309 const struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4310 enum pipe pipe = intel_crtc->pipe;
4312 for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
4313 enum plane_id plane_id = intel_plane->id;
4314 const struct skl_ddb_entry *old, *new;
4316 old = &old_ddb->plane[pipe][plane_id];
4317 new = &new_ddb->plane[pipe][plane_id];
4319 if (skl_ddb_entry_equal(old, new))
4322 DRM_DEBUG_ATOMIC("[PLANE:%d:%s] ddb (%d - %d) -> (%d - %d)\n",
4323 intel_plane->base.base.id,
4324 intel_plane->base.name,
4325 old->start, old->end,
4326 new->start, new->end);
4332 skl_compute_wm(struct drm_atomic_state *state)
4334 struct drm_crtc *crtc;
4335 struct drm_crtc_state *cstate;
4336 struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
4337 struct skl_wm_values *results = &intel_state->wm_results;
4338 struct drm_device *dev = state->dev;
4339 struct skl_pipe_wm *pipe_wm;
4340 bool changed = false;
4344 * When we distrust bios wm we always need to recompute to set the
4345 * expected DDB allocations for each CRTC.
4347 if (to_i915(dev)->wm.distrust_bios_wm)
4351 * If this transaction isn't actually touching any CRTC's, don't
4352 * bother with watermark calculation. Note that if we pass this
4353 * test, we're guaranteed to hold at least one CRTC state mutex,
4354 * which means we can safely use values like dev_priv->active_crtcs
4355 * since any racing commits that want to update them would need to
4356 * hold _all_ CRTC state mutexes.
4358 for_each_new_crtc_in_state(state, crtc, cstate, i)
4364 /* Clear all dirty flags */
4365 results->dirty_pipes = 0;
4367 ret = skl_compute_ddb(state);
4372 * Calculate WM's for all pipes that are part of this transaction.
4373 * Note that the DDB allocation above may have added more CRTC's that
4374 * weren't otherwise being modified (and set bits in dirty_pipes) if
4375 * pipe allocations had to change.
4377 * FIXME: Now that we're doing this in the atomic check phase, we
4378 * should allow skl_update_pipe_wm() to return failure in cases where
4379 * no suitable watermark values can be found.
4381 for_each_new_crtc_in_state(state, crtc, cstate, i) {
4382 struct intel_crtc_state *intel_cstate =
4383 to_intel_crtc_state(cstate);
4384 const struct skl_pipe_wm *old_pipe_wm =
4385 &to_intel_crtc_state(crtc->state)->wm.skl.optimal;
4387 pipe_wm = &intel_cstate->wm.skl.optimal;
4388 ret = skl_update_pipe_wm(cstate, old_pipe_wm, pipe_wm,
4389 &results->ddb, &changed);
4394 results->dirty_pipes |= drm_crtc_mask(crtc);
4396 if ((results->dirty_pipes & drm_crtc_mask(crtc)) == 0)
4397 /* This pipe's WM's did not change */
4400 intel_cstate->update_wm_pre = true;
4403 skl_print_wm_changes(state);
4408 static void skl_atomic_update_crtc_wm(struct intel_atomic_state *state,
4409 struct intel_crtc_state *cstate)
4411 struct intel_crtc *crtc = to_intel_crtc(cstate->base.crtc);
4412 struct drm_i915_private *dev_priv = to_i915(state->base.dev);
4413 struct skl_pipe_wm *pipe_wm = &cstate->wm.skl.optimal;
4414 const struct skl_ddb_allocation *ddb = &state->wm_results.ddb;
4415 enum pipe pipe = crtc->pipe;
4416 enum plane_id plane_id;
4418 if (!(state->wm_results.dirty_pipes & drm_crtc_mask(&crtc->base)))
4421 I915_WRITE(PIPE_WM_LINETIME(pipe), pipe_wm->linetime);
4423 for_each_plane_id_on_crtc(crtc, plane_id) {
4424 if (plane_id != PLANE_CURSOR)
4425 skl_write_plane_wm(crtc, &pipe_wm->planes[plane_id],
4428 skl_write_cursor_wm(crtc, &pipe_wm->planes[plane_id],
4433 static void skl_initial_wm(struct intel_atomic_state *state,
4434 struct intel_crtc_state *cstate)
4436 struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
4437 struct drm_device *dev = intel_crtc->base.dev;
4438 struct drm_i915_private *dev_priv = to_i915(dev);
4439 struct skl_wm_values *results = &state->wm_results;
4440 struct skl_wm_values *hw_vals = &dev_priv->wm.skl_hw;
4441 enum pipe pipe = intel_crtc->pipe;
4443 if ((results->dirty_pipes & drm_crtc_mask(&intel_crtc->base)) == 0)
4446 mutex_lock(&dev_priv->wm.wm_mutex);
4448 if (cstate->base.active_changed)
4449 skl_atomic_update_crtc_wm(state, cstate);
4451 skl_copy_wm_for_pipe(hw_vals, results, pipe);
4453 mutex_unlock(&dev_priv->wm.wm_mutex);
4456 static void ilk_compute_wm_config(struct drm_device *dev,
4457 struct intel_wm_config *config)
4459 struct intel_crtc *crtc;
4461 /* Compute the currently _active_ config */
4462 for_each_intel_crtc(dev, crtc) {
4463 const struct intel_pipe_wm *wm = &crtc->wm.active.ilk;
4465 if (!wm->pipe_enabled)
4468 config->sprites_enabled |= wm->sprites_enabled;
4469 config->sprites_scaled |= wm->sprites_scaled;
4470 config->num_pipes_active++;
4474 static void ilk_program_watermarks(struct drm_i915_private *dev_priv)
4476 struct drm_device *dev = &dev_priv->drm;
4477 struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
4478 struct ilk_wm_maximums max;
4479 struct intel_wm_config config = {};
4480 struct ilk_wm_values results = {};
4481 enum intel_ddb_partitioning partitioning;
4483 ilk_compute_wm_config(dev, &config);
4485 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_1_2, &max);
4486 ilk_wm_merge(dev, &config, &max, &lp_wm_1_2);
4488 /* 5/6 split only in single pipe config on IVB+ */
4489 if (INTEL_GEN(dev_priv) >= 7 &&
4490 config.num_pipes_active == 1 && config.sprites_enabled) {
4491 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
4492 ilk_wm_merge(dev, &config, &max, &lp_wm_5_6);
4494 best_lp_wm = ilk_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6);
4496 best_lp_wm = &lp_wm_1_2;
4499 partitioning = (best_lp_wm == &lp_wm_1_2) ?
4500 INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
4502 ilk_compute_wm_results(dev, best_lp_wm, partitioning, &results);
4504 ilk_write_wm_values(dev_priv, &results);
4507 static void ilk_initial_watermarks(struct intel_atomic_state *state,
4508 struct intel_crtc_state *cstate)
4510 struct drm_i915_private *dev_priv = to_i915(cstate->base.crtc->dev);
4511 struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
4513 mutex_lock(&dev_priv->wm.wm_mutex);
4514 intel_crtc->wm.active.ilk = cstate->wm.ilk.intermediate;
4515 ilk_program_watermarks(dev_priv);
4516 mutex_unlock(&dev_priv->wm.wm_mutex);
4519 static void ilk_optimize_watermarks(struct intel_atomic_state *state,
4520 struct intel_crtc_state *cstate)
4522 struct drm_i915_private *dev_priv = to_i915(cstate->base.crtc->dev);
4523 struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc);
4525 mutex_lock(&dev_priv->wm.wm_mutex);
4526 if (cstate->wm.need_postvbl_update) {
4527 intel_crtc->wm.active.ilk = cstate->wm.ilk.optimal;
4528 ilk_program_watermarks(dev_priv);
4530 mutex_unlock(&dev_priv->wm.wm_mutex);
4533 static inline void skl_wm_level_from_reg_val(uint32_t val,
4534 struct skl_wm_level *level)
4536 level->plane_en = val & PLANE_WM_EN;
4537 level->plane_res_b = val & PLANE_WM_BLOCKS_MASK;
4538 level->plane_res_l = (val >> PLANE_WM_LINES_SHIFT) &
4539 PLANE_WM_LINES_MASK;
4542 void skl_pipe_wm_get_hw_state(struct drm_crtc *crtc,
4543 struct skl_pipe_wm *out)
4545 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
4546 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4547 enum pipe pipe = intel_crtc->pipe;
4548 int level, max_level;
4549 enum plane_id plane_id;
4552 max_level = ilk_wm_max_level(dev_priv);
4554 for_each_plane_id_on_crtc(intel_crtc, plane_id) {
4555 struct skl_plane_wm *wm = &out->planes[plane_id];
4557 for (level = 0; level <= max_level; level++) {
4558 if (plane_id != PLANE_CURSOR)
4559 val = I915_READ(PLANE_WM(pipe, plane_id, level));
4561 val = I915_READ(CUR_WM(pipe, level));
4563 skl_wm_level_from_reg_val(val, &wm->wm[level]);
4566 if (plane_id != PLANE_CURSOR)
4567 val = I915_READ(PLANE_WM_TRANS(pipe, plane_id));
4569 val = I915_READ(CUR_WM_TRANS(pipe));
4571 skl_wm_level_from_reg_val(val, &wm->trans_wm);
4574 if (!intel_crtc->active)
4577 out->linetime = I915_READ(PIPE_WM_LINETIME(pipe));
4580 void skl_wm_get_hw_state(struct drm_device *dev)
4582 struct drm_i915_private *dev_priv = to_i915(dev);
4583 struct skl_wm_values *hw = &dev_priv->wm.skl_hw;
4584 struct skl_ddb_allocation *ddb = &dev_priv->wm.skl_hw.ddb;
4585 struct drm_crtc *crtc;
4586 struct intel_crtc *intel_crtc;
4587 struct intel_crtc_state *cstate;
4589 skl_ddb_get_hw_state(dev_priv, ddb);
4590 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
4591 intel_crtc = to_intel_crtc(crtc);
4592 cstate = to_intel_crtc_state(crtc->state);
4594 skl_pipe_wm_get_hw_state(crtc, &cstate->wm.skl.optimal);
4596 if (intel_crtc->active)
4597 hw->dirty_pipes |= drm_crtc_mask(crtc);
4600 if (dev_priv->active_crtcs) {
4601 /* Fully recompute DDB on first atomic commit */
4602 dev_priv->wm.distrust_bios_wm = true;
4604 /* Easy/common case; just sanitize DDB now if everything off */
4605 memset(ddb, 0, sizeof(*ddb));
4609 static void ilk_pipe_wm_get_hw_state(struct drm_crtc *crtc)
4611 struct drm_device *dev = crtc->dev;
4612 struct drm_i915_private *dev_priv = to_i915(dev);
4613 struct ilk_wm_values *hw = &dev_priv->wm.hw;
4614 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
4615 struct intel_crtc_state *cstate = to_intel_crtc_state(crtc->state);
4616 struct intel_pipe_wm *active = &cstate->wm.ilk.optimal;
4617 enum pipe pipe = intel_crtc->pipe;
4618 static const i915_reg_t wm0_pipe_reg[] = {
4619 [PIPE_A] = WM0_PIPEA_ILK,
4620 [PIPE_B] = WM0_PIPEB_ILK,
4621 [PIPE_C] = WM0_PIPEC_IVB,
4624 hw->wm_pipe[pipe] = I915_READ(wm0_pipe_reg[pipe]);
4625 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
4626 hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe));
4628 memset(active, 0, sizeof(*active));
4630 active->pipe_enabled = intel_crtc->active;
4632 if (active->pipe_enabled) {
4633 u32 tmp = hw->wm_pipe[pipe];
4636 * For active pipes LP0 watermark is marked as
4637 * enabled, and LP1+ watermaks as disabled since
4638 * we can't really reverse compute them in case
4639 * multiple pipes are active.
4641 active->wm[0].enable = true;
4642 active->wm[0].pri_val = (tmp & WM0_PIPE_PLANE_MASK) >> WM0_PIPE_PLANE_SHIFT;
4643 active->wm[0].spr_val = (tmp & WM0_PIPE_SPRITE_MASK) >> WM0_PIPE_SPRITE_SHIFT;
4644 active->wm[0].cur_val = tmp & WM0_PIPE_CURSOR_MASK;
4645 active->linetime = hw->wm_linetime[pipe];
4647 int level, max_level = ilk_wm_max_level(dev_priv);
4650 * For inactive pipes, all watermark levels
4651 * should be marked as enabled but zeroed,
4652 * which is what we'd compute them to.
4654 for (level = 0; level <= max_level; level++)
4655 active->wm[level].enable = true;
4658 intel_crtc->wm.active.ilk = *active;
4661 #define _FW_WM(value, plane) \
4662 (((value) & DSPFW_ ## plane ## _MASK) >> DSPFW_ ## plane ## _SHIFT)
4663 #define _FW_WM_VLV(value, plane) \
4664 (((value) & DSPFW_ ## plane ## _MASK_VLV) >> DSPFW_ ## plane ## _SHIFT)
4666 static void vlv_read_wm_values(struct drm_i915_private *dev_priv,
4667 struct vlv_wm_values *wm)
4672 for_each_pipe(dev_priv, pipe) {
4673 tmp = I915_READ(VLV_DDL(pipe));
4675 wm->ddl[pipe].plane[PLANE_PRIMARY] =
4676 (tmp >> DDL_PLANE_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
4677 wm->ddl[pipe].plane[PLANE_CURSOR] =
4678 (tmp >> DDL_CURSOR_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
4679 wm->ddl[pipe].plane[PLANE_SPRITE0] =
4680 (tmp >> DDL_SPRITE_SHIFT(0)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
4681 wm->ddl[pipe].plane[PLANE_SPRITE1] =
4682 (tmp >> DDL_SPRITE_SHIFT(1)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK);
4685 tmp = I915_READ(DSPFW1);
4686 wm->sr.plane = _FW_WM(tmp, SR);
4687 wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB);
4688 wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEB);
4689 wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEA);
4691 tmp = I915_READ(DSPFW2);
4692 wm->pipe[PIPE_A].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEB);
4693 wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA);
4694 wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEA);
4696 tmp = I915_READ(DSPFW3);
4697 wm->sr.cursor = _FW_WM(tmp, CURSOR_SR);
4699 if (IS_CHERRYVIEW(dev_priv)) {
4700 tmp = I915_READ(DSPFW7_CHV);
4701 wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED);
4702 wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC);
4704 tmp = I915_READ(DSPFW8_CHV);
4705 wm->pipe[PIPE_C].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEF);
4706 wm->pipe[PIPE_C].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEE);
4708 tmp = I915_READ(DSPFW9_CHV);
4709 wm->pipe[PIPE_C].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEC);
4710 wm->pipe[PIPE_C].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORC);
4712 tmp = I915_READ(DSPHOWM);
4713 wm->sr.plane |= _FW_WM(tmp, SR_HI) << 9;
4714 wm->pipe[PIPE_C].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEF_HI) << 8;
4715 wm->pipe[PIPE_C].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEE_HI) << 8;
4716 wm->pipe[PIPE_C].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEC_HI) << 8;
4717 wm->pipe[PIPE_B].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITED_HI) << 8;
4718 wm->pipe[PIPE_B].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEC_HI) << 8;
4719 wm->pipe[PIPE_B].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEB_HI) << 8;
4720 wm->pipe[PIPE_A].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEB_HI) << 8;
4721 wm->pipe[PIPE_A].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEA_HI) << 8;
4722 wm->pipe[PIPE_A].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEA_HI) << 8;
4724 tmp = I915_READ(DSPFW7);
4725 wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED);
4726 wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC);
4728 tmp = I915_READ(DSPHOWM);
4729 wm->sr.plane |= _FW_WM(tmp, SR_HI) << 9;
4730 wm->pipe[PIPE_B].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITED_HI) << 8;
4731 wm->pipe[PIPE_B].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEC_HI) << 8;
4732 wm->pipe[PIPE_B].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEB_HI) << 8;
4733 wm->pipe[PIPE_A].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEB_HI) << 8;
4734 wm->pipe[PIPE_A].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEA_HI) << 8;
4735 wm->pipe[PIPE_A].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEA_HI) << 8;
4742 void vlv_wm_get_hw_state(struct drm_device *dev)
4744 struct drm_i915_private *dev_priv = to_i915(dev);
4745 struct vlv_wm_values *wm = &dev_priv->wm.vlv;
4746 struct intel_crtc *crtc;
4749 vlv_read_wm_values(dev_priv, wm);
4751 wm->cxsr = I915_READ(FW_BLC_SELF_VLV) & FW_CSPWRDWNEN;
4752 wm->level = VLV_WM_LEVEL_PM2;
4754 if (IS_CHERRYVIEW(dev_priv)) {
4755 mutex_lock(&dev_priv->rps.hw_lock);
4757 val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
4758 if (val & DSP_MAXFIFO_PM5_ENABLE)
4759 wm->level = VLV_WM_LEVEL_PM5;
4762 * If DDR DVFS is disabled in the BIOS, Punit
4763 * will never ack the request. So if that happens
4764 * assume we don't have to enable/disable DDR DVFS
4765 * dynamically. To test that just set the REQ_ACK
4766 * bit to poke the Punit, but don't change the
4767 * HIGH/LOW bits so that we don't actually change
4768 * the current state.
4770 val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
4771 val |= FORCE_DDR_FREQ_REQ_ACK;
4772 vlv_punit_write(dev_priv, PUNIT_REG_DDR_SETUP2, val);
4774 if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2) &
4775 FORCE_DDR_FREQ_REQ_ACK) == 0, 3)) {
4776 DRM_DEBUG_KMS("Punit not acking DDR DVFS request, "
4777 "assuming DDR DVFS is disabled\n");
4778 dev_priv->wm.max_level = VLV_WM_LEVEL_PM5;
4780 val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2);
4781 if ((val & FORCE_DDR_HIGH_FREQ) == 0)
4782 wm->level = VLV_WM_LEVEL_DDR_DVFS;
4785 mutex_unlock(&dev_priv->rps.hw_lock);
4788 for_each_intel_crtc(dev, crtc) {
4789 struct intel_crtc_state *crtc_state =
4790 to_intel_crtc_state(crtc->base.state);
4791 struct vlv_wm_state *active = &crtc->wm.active.vlv;
4792 const struct vlv_fifo_state *fifo_state =
4793 &crtc_state->wm.vlv.fifo_state;
4794 enum pipe pipe = crtc->pipe;
4795 enum plane_id plane_id;
4798 vlv_get_fifo_size(crtc_state);
4800 active->num_levels = wm->level + 1;
4801 active->cxsr = wm->cxsr;
4803 for (level = 0; level < active->num_levels; level++) {
4804 struct vlv_pipe_wm *raw =
4805 &crtc_state->wm.vlv.raw[level];
4807 active->sr[level].plane = wm->sr.plane;
4808 active->sr[level].cursor = wm->sr.cursor;
4810 for_each_plane_id_on_crtc(crtc, plane_id) {
4811 active->wm[level].plane[plane_id] =
4812 wm->pipe[pipe].plane[plane_id];
4814 raw->plane[plane_id] =
4815 vlv_invert_wm_value(active->wm[level].plane[plane_id],
4816 fifo_state->plane[plane_id]);
4820 for_each_plane_id_on_crtc(crtc, plane_id)
4821 vlv_raw_plane_wm_set(crtc_state, level,
4822 plane_id, USHRT_MAX);
4823 vlv_invalidate_wms(crtc, active, level);
4825 crtc_state->wm.vlv.optimal = *active;
4826 crtc_state->wm.vlv.intermediate = *active;
4828 DRM_DEBUG_KMS("Initial watermarks: pipe %c, plane=%d, cursor=%d, sprite0=%d, sprite1=%d\n",
4830 wm->pipe[pipe].plane[PLANE_PRIMARY],
4831 wm->pipe[pipe].plane[PLANE_CURSOR],
4832 wm->pipe[pipe].plane[PLANE_SPRITE0],
4833 wm->pipe[pipe].plane[PLANE_SPRITE1]);
4836 DRM_DEBUG_KMS("Initial watermarks: SR plane=%d, SR cursor=%d level=%d cxsr=%d\n",
4837 wm->sr.plane, wm->sr.cursor, wm->level, wm->cxsr);
4840 void vlv_wm_sanitize(struct drm_i915_private *dev_priv)
4842 struct intel_plane *plane;
4843 struct intel_crtc *crtc;
4845 mutex_lock(&dev_priv->wm.wm_mutex);
4847 for_each_intel_plane(&dev_priv->drm, plane) {
4848 struct intel_crtc *crtc =
4849 intel_get_crtc_for_pipe(dev_priv, plane->pipe);
4850 struct intel_crtc_state *crtc_state =
4851 to_intel_crtc_state(crtc->base.state);
4852 struct intel_plane_state *plane_state =
4853 to_intel_plane_state(plane->base.state);
4854 struct vlv_wm_state *wm_state = &crtc_state->wm.vlv.optimal;
4855 const struct vlv_fifo_state *fifo_state =
4856 &crtc_state->wm.vlv.fifo_state;
4857 enum plane_id plane_id = plane->id;
4860 if (plane_state->base.visible)
4863 for (level = 0; level < wm_state->num_levels; level++) {
4864 struct vlv_pipe_wm *raw =
4865 &crtc_state->wm.vlv.raw[level];
4867 raw->plane[plane_id] = 0;
4869 wm_state->wm[level].plane[plane_id] =
4870 vlv_invert_wm_value(raw->plane[plane_id],
4871 fifo_state->plane[plane_id]);
4875 for_each_intel_crtc(&dev_priv->drm, crtc) {
4876 struct intel_crtc_state *crtc_state =
4877 to_intel_crtc_state(crtc->base.state);
4879 crtc_state->wm.vlv.intermediate =
4880 crtc_state->wm.vlv.optimal;
4881 crtc->wm.active.vlv = crtc_state->wm.vlv.optimal;
4884 vlv_program_watermarks(dev_priv);
4886 mutex_unlock(&dev_priv->wm.wm_mutex);
4889 void ilk_wm_get_hw_state(struct drm_device *dev)
4891 struct drm_i915_private *dev_priv = to_i915(dev);
4892 struct ilk_wm_values *hw = &dev_priv->wm.hw;
4893 struct drm_crtc *crtc;
4895 for_each_crtc(dev, crtc)
4896 ilk_pipe_wm_get_hw_state(crtc);
4898 hw->wm_lp[0] = I915_READ(WM1_LP_ILK);
4899 hw->wm_lp[1] = I915_READ(WM2_LP_ILK);
4900 hw->wm_lp[2] = I915_READ(WM3_LP_ILK);
4902 hw->wm_lp_spr[0] = I915_READ(WM1S_LP_ILK);
4903 if (INTEL_GEN(dev_priv) >= 7) {
4904 hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
4905 hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
4908 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
4909 hw->partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ?
4910 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
4911 else if (IS_IVYBRIDGE(dev_priv))
4912 hw->partitioning = (I915_READ(DISP_ARB_CTL2) & DISP_DATA_PARTITION_5_6) ?
4913 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
4916 !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS);
4920 * intel_update_watermarks - update FIFO watermark values based on current modes
4922 * Calculate watermark values for the various WM regs based on current mode
4923 * and plane configuration.
4925 * There are several cases to deal with here:
4926 * - normal (i.e. non-self-refresh)
4927 * - self-refresh (SR) mode
4928 * - lines are large relative to FIFO size (buffer can hold up to 2)
4929 * - lines are small relative to FIFO size (buffer can hold more than 2
4930 * lines), so need to account for TLB latency
4932 * The normal calculation is:
4933 * watermark = dotclock * bytes per pixel * latency
4934 * where latency is platform & configuration dependent (we assume pessimal
4937 * The SR calculation is:
4938 * watermark = (trunc(latency/line time)+1) * surface width *
4941 * line time = htotal / dotclock
4942 * surface width = hdisplay for normal plane and 64 for cursor
4943 * and latency is assumed to be high, as above.
4945 * The final value programmed to the register should always be rounded up,
4946 * and include an extra 2 entries to account for clock crossings.
4948 * We don't use the sprite, so we can ignore that. And on Crestline we have
4949 * to set the non-SR watermarks to 8.
4951 void intel_update_watermarks(struct intel_crtc *crtc)
4953 struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
4955 if (dev_priv->display.update_wm)
4956 dev_priv->display.update_wm(crtc);
4960 * Lock protecting IPS related data structures
4962 DEFINE_SPINLOCK(mchdev_lock);
4964 /* Global for IPS driver to get at the current i915 device. Protected by
4966 static struct drm_i915_private *i915_mch_dev;
4968 bool ironlake_set_drps(struct drm_i915_private *dev_priv, u8 val)
4972 lockdep_assert_held(&mchdev_lock);
4974 rgvswctl = I915_READ16(MEMSWCTL);
4975 if (rgvswctl & MEMCTL_CMD_STS) {
4976 DRM_DEBUG("gpu busy, RCS change rejected\n");
4977 return false; /* still busy with another command */
4980 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
4981 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
4982 I915_WRITE16(MEMSWCTL, rgvswctl);
4983 POSTING_READ16(MEMSWCTL);
4985 rgvswctl |= MEMCTL_CMD_STS;
4986 I915_WRITE16(MEMSWCTL, rgvswctl);
4991 static void ironlake_enable_drps(struct drm_i915_private *dev_priv)
4994 u8 fmax, fmin, fstart, vstart;
4996 spin_lock_irq(&mchdev_lock);
4998 rgvmodectl = I915_READ(MEMMODECTL);
5000 /* Enable temp reporting */
5001 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
5002 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
5004 /* 100ms RC evaluation intervals */
5005 I915_WRITE(RCUPEI, 100000);
5006 I915_WRITE(RCDNEI, 100000);
5008 /* Set max/min thresholds to 90ms and 80ms respectively */
5009 I915_WRITE(RCBMAXAVG, 90000);
5010 I915_WRITE(RCBMINAVG, 80000);
5012 I915_WRITE(MEMIHYST, 1);
5014 /* Set up min, max, and cur for interrupt handling */
5015 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
5016 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
5017 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
5018 MEMMODE_FSTART_SHIFT;
5020 vstart = (I915_READ(PXVFREQ(fstart)) & PXVFREQ_PX_MASK) >>
5023 dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
5024 dev_priv->ips.fstart = fstart;
5026 dev_priv->ips.max_delay = fstart;
5027 dev_priv->ips.min_delay = fmin;
5028 dev_priv->ips.cur_delay = fstart;
5030 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
5031 fmax, fmin, fstart);
5033 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
5036 * Interrupts will be enabled in ironlake_irq_postinstall
5039 I915_WRITE(VIDSTART, vstart);
5040 POSTING_READ(VIDSTART);
5042 rgvmodectl |= MEMMODE_SWMODE_EN;
5043 I915_WRITE(MEMMODECTL, rgvmodectl);
5045 if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
5046 DRM_ERROR("stuck trying to change perf mode\n");
5049 ironlake_set_drps(dev_priv, fstart);
5051 dev_priv->ips.last_count1 = I915_READ(DMIEC) +
5052 I915_READ(DDREC) + I915_READ(CSIEC);
5053 dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
5054 dev_priv->ips.last_count2 = I915_READ(GFXEC);
5055 dev_priv->ips.last_time2 = ktime_get_raw_ns();
5057 spin_unlock_irq(&mchdev_lock);
5060 static void ironlake_disable_drps(struct drm_i915_private *dev_priv)
5064 spin_lock_irq(&mchdev_lock);
5066 rgvswctl = I915_READ16(MEMSWCTL);
5068 /* Ack interrupts, disable EFC interrupt */
5069 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
5070 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
5071 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
5072 I915_WRITE(DEIIR, DE_PCU_EVENT);
5073 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
5075 /* Go back to the starting frequency */
5076 ironlake_set_drps(dev_priv, dev_priv->ips.fstart);
5078 rgvswctl |= MEMCTL_CMD_STS;
5079 I915_WRITE(MEMSWCTL, rgvswctl);
5082 spin_unlock_irq(&mchdev_lock);
5085 /* There's a funny hw issue where the hw returns all 0 when reading from
5086 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
5087 * ourselves, instead of doing a rmw cycle (which might result in us clearing
5088 * all limits and the gpu stuck at whatever frequency it is at atm).
5090 static u32 intel_rps_limits(struct drm_i915_private *dev_priv, u8 val)
5094 /* Only set the down limit when we've reached the lowest level to avoid
5095 * getting more interrupts, otherwise leave this clear. This prevents a
5096 * race in the hw when coming out of rc6: There's a tiny window where
5097 * the hw runs at the minimal clock before selecting the desired
5098 * frequency, if the down threshold expires in that window we will not
5099 * receive a down interrupt. */
5100 if (IS_GEN9(dev_priv)) {
5101 limits = (dev_priv->rps.max_freq_softlimit) << 23;
5102 if (val <= dev_priv->rps.min_freq_softlimit)
5103 limits |= (dev_priv->rps.min_freq_softlimit) << 14;
5105 limits = dev_priv->rps.max_freq_softlimit << 24;
5106 if (val <= dev_priv->rps.min_freq_softlimit)
5107 limits |= dev_priv->rps.min_freq_softlimit << 16;
5113 static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
5116 u32 threshold_up = 0, threshold_down = 0; /* in % */
5117 u32 ei_up = 0, ei_down = 0;
5119 new_power = dev_priv->rps.power;
5120 switch (dev_priv->rps.power) {
5122 if (val > dev_priv->rps.efficient_freq + 1 &&
5123 val > dev_priv->rps.cur_freq)
5124 new_power = BETWEEN;
5128 if (val <= dev_priv->rps.efficient_freq &&
5129 val < dev_priv->rps.cur_freq)
5130 new_power = LOW_POWER;
5131 else if (val >= dev_priv->rps.rp0_freq &&
5132 val > dev_priv->rps.cur_freq)
5133 new_power = HIGH_POWER;
5137 if (val < (dev_priv->rps.rp1_freq + dev_priv->rps.rp0_freq) >> 1 &&
5138 val < dev_priv->rps.cur_freq)
5139 new_power = BETWEEN;
5142 /* Max/min bins are special */
5143 if (val <= dev_priv->rps.min_freq_softlimit)
5144 new_power = LOW_POWER;
5145 if (val >= dev_priv->rps.max_freq_softlimit)
5146 new_power = HIGH_POWER;
5147 if (new_power == dev_priv->rps.power)
5150 /* Note the units here are not exactly 1us, but 1280ns. */
5151 switch (new_power) {
5153 /* Upclock if more than 95% busy over 16ms */
5157 /* Downclock if less than 85% busy over 32ms */
5159 threshold_down = 85;
5163 /* Upclock if more than 90% busy over 13ms */
5167 /* Downclock if less than 75% busy over 32ms */
5169 threshold_down = 75;
5173 /* Upclock if more than 85% busy over 10ms */
5177 /* Downclock if less than 60% busy over 32ms */
5179 threshold_down = 60;
5183 /* When byt can survive without system hang with dynamic
5184 * sw freq adjustments, this restriction can be lifted.
5186 if (IS_VALLEYVIEW(dev_priv))
5189 I915_WRITE(GEN6_RP_UP_EI,
5190 GT_INTERVAL_FROM_US(dev_priv, ei_up));
5191 I915_WRITE(GEN6_RP_UP_THRESHOLD,
5192 GT_INTERVAL_FROM_US(dev_priv,
5193 ei_up * threshold_up / 100));
5195 I915_WRITE(GEN6_RP_DOWN_EI,
5196 GT_INTERVAL_FROM_US(dev_priv, ei_down));
5197 I915_WRITE(GEN6_RP_DOWN_THRESHOLD,
5198 GT_INTERVAL_FROM_US(dev_priv,
5199 ei_down * threshold_down / 100));
5201 I915_WRITE(GEN6_RP_CONTROL,
5202 GEN6_RP_MEDIA_TURBO |
5203 GEN6_RP_MEDIA_HW_NORMAL_MODE |
5204 GEN6_RP_MEDIA_IS_GFX |
5206 GEN6_RP_UP_BUSY_AVG |
5207 GEN6_RP_DOWN_IDLE_AVG);
5210 dev_priv->rps.power = new_power;
5211 dev_priv->rps.up_threshold = threshold_up;
5212 dev_priv->rps.down_threshold = threshold_down;
5213 dev_priv->rps.last_adj = 0;
5216 static u32 gen6_rps_pm_mask(struct drm_i915_private *dev_priv, u8 val)
5220 /* We use UP_EI_EXPIRED interupts for both up/down in manual mode */
5221 if (val > dev_priv->rps.min_freq_softlimit)
5222 mask |= GEN6_PM_RP_UP_EI_EXPIRED | GEN6_PM_RP_DOWN_THRESHOLD | GEN6_PM_RP_DOWN_TIMEOUT;
5223 if (val < dev_priv->rps.max_freq_softlimit)
5224 mask |= GEN6_PM_RP_UP_EI_EXPIRED | GEN6_PM_RP_UP_THRESHOLD;
5226 mask &= dev_priv->pm_rps_events;
5228 return gen6_sanitize_rps_pm_mask(dev_priv, ~mask);
5231 /* gen6_set_rps is called to update the frequency request, but should also be
5232 * called when the range (min_delay and max_delay) is modified so that we can
5233 * update the GEN6_RP_INTERRUPT_LIMITS register accordingly. */
5234 static int gen6_set_rps(struct drm_i915_private *dev_priv, u8 val)
5236 /* min/max delay may still have been modified so be sure to
5237 * write the limits value.
5239 if (val != dev_priv->rps.cur_freq) {
5240 gen6_set_rps_thresholds(dev_priv, val);
5242 if (IS_GEN9(dev_priv))
5243 I915_WRITE(GEN6_RPNSWREQ,
5244 GEN9_FREQUENCY(val));
5245 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
5246 I915_WRITE(GEN6_RPNSWREQ,
5247 HSW_FREQUENCY(val));
5249 I915_WRITE(GEN6_RPNSWREQ,
5250 GEN6_FREQUENCY(val) |
5252 GEN6_AGGRESSIVE_TURBO);
5255 /* Make sure we continue to get interrupts
5256 * until we hit the minimum or maximum frequencies.
5258 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, intel_rps_limits(dev_priv, val));
5259 I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
5261 dev_priv->rps.cur_freq = val;
5262 trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
5267 static int valleyview_set_rps(struct drm_i915_private *dev_priv, u8 val)
5271 if (WARN_ONCE(IS_CHERRYVIEW(dev_priv) && (val & 1),
5272 "Odd GPU freq value\n"))
5275 I915_WRITE(GEN6_PMINTRMSK, gen6_rps_pm_mask(dev_priv, val));
5277 if (val != dev_priv->rps.cur_freq) {
5278 err = vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
5282 gen6_set_rps_thresholds(dev_priv, val);
5285 dev_priv->rps.cur_freq = val;
5286 trace_intel_gpu_freq_change(intel_gpu_freq(dev_priv, val));
5291 /* vlv_set_rps_idle: Set the frequency to idle, if Gfx clocks are down
5293 * * If Gfx is Idle, then
5294 * 1. Forcewake Media well.
5295 * 2. Request idle freq.
5296 * 3. Release Forcewake of Media well.
5298 static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
5300 u32 val = dev_priv->rps.idle_freq;
5303 if (dev_priv->rps.cur_freq <= val)
5306 /* The punit delays the write of the frequency and voltage until it
5307 * determines the GPU is awake. During normal usage we don't want to
5308 * waste power changing the frequency if the GPU is sleeping (rc6).
5309 * However, the GPU and driver is now idle and we do not want to delay
5310 * switching to minimum voltage (reducing power whilst idle) as we do
5311 * not expect to be woken in the near future and so must flush the
5312 * change by waking the device.
5314 * We choose to take the media powerwell (either would do to trick the
5315 * punit into committing the voltage change) as that takes a lot less
5316 * power than the render powerwell.
5318 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_MEDIA);
5319 err = valleyview_set_rps(dev_priv, val);
5320 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_MEDIA);
5323 DRM_ERROR("Failed to set RPS for idle\n");
5326 void gen6_rps_busy(struct drm_i915_private *dev_priv)
5328 mutex_lock(&dev_priv->rps.hw_lock);
5329 if (dev_priv->rps.enabled) {
5332 if (dev_priv->pm_rps_events & GEN6_PM_RP_UP_EI_EXPIRED)
5333 gen6_rps_reset_ei(dev_priv);
5334 I915_WRITE(GEN6_PMINTRMSK,
5335 gen6_rps_pm_mask(dev_priv, dev_priv->rps.cur_freq));
5337 gen6_enable_rps_interrupts(dev_priv);
5339 /* Use the user's desired frequency as a guide, but for better
5340 * performance, jump directly to RPe as our starting frequency.
5342 freq = max(dev_priv->rps.cur_freq,
5343 dev_priv->rps.efficient_freq);
5345 if (intel_set_rps(dev_priv,
5347 dev_priv->rps.min_freq_softlimit,
5348 dev_priv->rps.max_freq_softlimit)))
5349 DRM_DEBUG_DRIVER("Failed to set idle frequency\n");
5351 mutex_unlock(&dev_priv->rps.hw_lock);
5354 void gen6_rps_idle(struct drm_i915_private *dev_priv)
5356 /* Flush our bottom-half so that it does not race with us
5357 * setting the idle frequency and so that it is bounded by
5358 * our rpm wakeref. And then disable the interrupts to stop any
5359 * futher RPS reclocking whilst we are asleep.
5361 gen6_disable_rps_interrupts(dev_priv);
5363 mutex_lock(&dev_priv->rps.hw_lock);
5364 if (dev_priv->rps.enabled) {
5365 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
5366 vlv_set_rps_idle(dev_priv);
5368 gen6_set_rps(dev_priv, dev_priv->rps.idle_freq);
5369 dev_priv->rps.last_adj = 0;
5370 I915_WRITE(GEN6_PMINTRMSK,
5371 gen6_sanitize_rps_pm_mask(dev_priv, ~0));
5373 mutex_unlock(&dev_priv->rps.hw_lock);
5375 spin_lock(&dev_priv->rps.client_lock);
5376 while (!list_empty(&dev_priv->rps.clients))
5377 list_del_init(dev_priv->rps.clients.next);
5378 spin_unlock(&dev_priv->rps.client_lock);
5381 void gen6_rps_boost(struct drm_i915_private *dev_priv,
5382 struct intel_rps_client *rps,
5383 unsigned long submitted)
5385 /* This is intentionally racy! We peek at the state here, then
5386 * validate inside the RPS worker.
5388 if (!(dev_priv->gt.awake &&
5389 dev_priv->rps.enabled &&
5390 dev_priv->rps.cur_freq < dev_priv->rps.boost_freq))
5393 /* Force a RPS boost (and don't count it against the client) if
5394 * the GPU is severely congested.
5396 if (rps && time_after(jiffies, submitted + DRM_I915_THROTTLE_JIFFIES))
5399 spin_lock(&dev_priv->rps.client_lock);
5400 if (rps == NULL || list_empty(&rps->link)) {
5401 spin_lock_irq(&dev_priv->irq_lock);
5402 if (dev_priv->rps.interrupts_enabled) {
5403 dev_priv->rps.client_boost = true;
5404 schedule_work(&dev_priv->rps.work);
5406 spin_unlock_irq(&dev_priv->irq_lock);
5409 list_add(&rps->link, &dev_priv->rps.clients);
5412 dev_priv->rps.boosts++;
5414 spin_unlock(&dev_priv->rps.client_lock);
5417 int intel_set_rps(struct drm_i915_private *dev_priv, u8 val)
5421 lockdep_assert_held(&dev_priv->rps.hw_lock);
5422 GEM_BUG_ON(val > dev_priv->rps.max_freq);
5423 GEM_BUG_ON(val < dev_priv->rps.min_freq);
5425 if (!dev_priv->rps.enabled) {
5426 dev_priv->rps.cur_freq = val;
5430 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
5431 err = valleyview_set_rps(dev_priv, val);
5433 err = gen6_set_rps(dev_priv, val);
5438 static void gen9_disable_rc6(struct drm_i915_private *dev_priv)
5440 I915_WRITE(GEN6_RC_CONTROL, 0);
5441 I915_WRITE(GEN9_PG_ENABLE, 0);
5444 static void gen9_disable_rps(struct drm_i915_private *dev_priv)
5446 I915_WRITE(GEN6_RP_CONTROL, 0);
5449 static void gen6_disable_rps(struct drm_i915_private *dev_priv)
5451 I915_WRITE(GEN6_RC_CONTROL, 0);
5452 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
5453 I915_WRITE(GEN6_RP_CONTROL, 0);
5456 static void cherryview_disable_rps(struct drm_i915_private *dev_priv)
5458 I915_WRITE(GEN6_RC_CONTROL, 0);
5461 static void valleyview_disable_rps(struct drm_i915_private *dev_priv)
5463 /* we're doing forcewake before Disabling RC6,
5464 * This what the BIOS expects when going into suspend */
5465 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
5467 I915_WRITE(GEN6_RC_CONTROL, 0);
5469 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
5472 static void intel_print_rc6_info(struct drm_i915_private *dev_priv, u32 mode)
5474 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
5475 if (mode & (GEN7_RC_CTL_TO_MODE | GEN6_RC_CTL_EI_MODE(1)))
5476 mode = GEN6_RC_CTL_RC6_ENABLE;
5480 if (HAS_RC6p(dev_priv))
5481 DRM_DEBUG_DRIVER("Enabling RC6 states: "
5482 "RC6 %s RC6p %s RC6pp %s\n",
5483 onoff(mode & GEN6_RC_CTL_RC6_ENABLE),
5484 onoff(mode & GEN6_RC_CTL_RC6p_ENABLE),
5485 onoff(mode & GEN6_RC_CTL_RC6pp_ENABLE));
5488 DRM_DEBUG_DRIVER("Enabling RC6 states: RC6 %s\n",
5489 onoff(mode & GEN6_RC_CTL_RC6_ENABLE));
5492 static bool bxt_check_bios_rc6_setup(struct drm_i915_private *dev_priv)
5494 struct i915_ggtt *ggtt = &dev_priv->ggtt;
5495 bool enable_rc6 = true;
5496 unsigned long rc6_ctx_base;
5500 rc_ctl = I915_READ(GEN6_RC_CONTROL);
5501 rc_sw_target = (I915_READ(GEN6_RC_STATE) & RC_SW_TARGET_STATE_MASK) >>
5502 RC_SW_TARGET_STATE_SHIFT;
5503 DRM_DEBUG_DRIVER("BIOS enabled RC states: "
5504 "HW_CTRL %s HW_RC6 %s SW_TARGET_STATE %x\n",
5505 onoff(rc_ctl & GEN6_RC_CTL_HW_ENABLE),
5506 onoff(rc_ctl & GEN6_RC_CTL_RC6_ENABLE),
5509 if (!(I915_READ(RC6_LOCATION) & RC6_CTX_IN_DRAM)) {
5510 DRM_DEBUG_DRIVER("RC6 Base location not set properly.\n");
5515 * The exact context size is not known for BXT, so assume a page size
5518 rc6_ctx_base = I915_READ(RC6_CTX_BASE) & RC6_CTX_BASE_MASK;
5519 if (!((rc6_ctx_base >= ggtt->stolen_reserved_base) &&
5520 (rc6_ctx_base + PAGE_SIZE <= ggtt->stolen_reserved_base +
5521 ggtt->stolen_reserved_size))) {
5522 DRM_DEBUG_DRIVER("RC6 Base address not as expected.\n");
5526 if (!(((I915_READ(PWRCTX_MAXCNT_RCSUNIT) & IDLE_TIME_MASK) > 1) &&
5527 ((I915_READ(PWRCTX_MAXCNT_VCSUNIT0) & IDLE_TIME_MASK) > 1) &&
5528 ((I915_READ(PWRCTX_MAXCNT_BCSUNIT) & IDLE_TIME_MASK) > 1) &&
5529 ((I915_READ(PWRCTX_MAXCNT_VECSUNIT) & IDLE_TIME_MASK) > 1))) {
5530 DRM_DEBUG_DRIVER("Engine Idle wait time not set properly.\n");
5534 if (!I915_READ(GEN8_PUSHBUS_CONTROL) ||
5535 !I915_READ(GEN8_PUSHBUS_ENABLE) ||
5536 !I915_READ(GEN8_PUSHBUS_SHIFT)) {
5537 DRM_DEBUG_DRIVER("Pushbus not setup properly.\n");
5541 if (!I915_READ(GEN6_GFXPAUSE)) {
5542 DRM_DEBUG_DRIVER("GFX pause not setup properly.\n");
5546 if (!I915_READ(GEN8_MISC_CTRL0)) {
5547 DRM_DEBUG_DRIVER("GPM control not setup properly.\n");
5554 int sanitize_rc6_option(struct drm_i915_private *dev_priv, int enable_rc6)
5556 /* No RC6 before Ironlake and code is gone for ilk. */
5557 if (INTEL_INFO(dev_priv)->gen < 6)
5563 if (IS_GEN9_LP(dev_priv) && !bxt_check_bios_rc6_setup(dev_priv)) {
5564 DRM_INFO("RC6 disabled by BIOS\n");
5568 /* Respect the kernel parameter if it is set */
5569 if (enable_rc6 >= 0) {
5572 if (HAS_RC6p(dev_priv))
5573 mask = INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE |
5576 mask = INTEL_RC6_ENABLE;
5578 if ((enable_rc6 & mask) != enable_rc6)
5579 DRM_DEBUG_DRIVER("Adjusting RC6 mask to %d "
5580 "(requested %d, valid %d)\n",
5581 enable_rc6 & mask, enable_rc6, mask);
5583 return enable_rc6 & mask;
5586 if (IS_IVYBRIDGE(dev_priv))
5587 return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE);
5589 return INTEL_RC6_ENABLE;
5592 static void gen6_init_rps_frequencies(struct drm_i915_private *dev_priv)
5594 /* All of these values are in units of 50MHz */
5596 /* static values from HW: RP0 > RP1 > RPn (min_freq) */
5597 if (IS_GEN9_LP(dev_priv)) {
5598 u32 rp_state_cap = I915_READ(BXT_RP_STATE_CAP);
5599 dev_priv->rps.rp0_freq = (rp_state_cap >> 16) & 0xff;
5600 dev_priv->rps.rp1_freq = (rp_state_cap >> 8) & 0xff;
5601 dev_priv->rps.min_freq = (rp_state_cap >> 0) & 0xff;
5603 u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
5604 dev_priv->rps.rp0_freq = (rp_state_cap >> 0) & 0xff;
5605 dev_priv->rps.rp1_freq = (rp_state_cap >> 8) & 0xff;
5606 dev_priv->rps.min_freq = (rp_state_cap >> 16) & 0xff;
5608 /* hw_max = RP0 until we check for overclocking */
5609 dev_priv->rps.max_freq = dev_priv->rps.rp0_freq;
5611 dev_priv->rps.efficient_freq = dev_priv->rps.rp1_freq;
5612 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv) ||
5613 IS_GEN9_BC(dev_priv)) {
5614 u32 ddcc_status = 0;
5616 if (sandybridge_pcode_read(dev_priv,
5617 HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL,
5619 dev_priv->rps.efficient_freq =
5621 ((ddcc_status >> 8) & 0xff),
5622 dev_priv->rps.min_freq,
5623 dev_priv->rps.max_freq);
5626 if (IS_GEN9_BC(dev_priv)) {
5627 /* Store the frequency values in 16.66 MHZ units, which is
5628 * the natural hardware unit for SKL
5630 dev_priv->rps.rp0_freq *= GEN9_FREQ_SCALER;
5631 dev_priv->rps.rp1_freq *= GEN9_FREQ_SCALER;
5632 dev_priv->rps.min_freq *= GEN9_FREQ_SCALER;
5633 dev_priv->rps.max_freq *= GEN9_FREQ_SCALER;
5634 dev_priv->rps.efficient_freq *= GEN9_FREQ_SCALER;
5638 static void reset_rps(struct drm_i915_private *dev_priv,
5639 int (*set)(struct drm_i915_private *, u8))
5641 u8 freq = dev_priv->rps.cur_freq;
5644 dev_priv->rps.power = -1;
5645 dev_priv->rps.cur_freq = -1;
5647 if (set(dev_priv, freq))
5648 DRM_ERROR("Failed to reset RPS to initial values\n");
5651 /* See the Gen9_GT_PM_Programming_Guide doc for the below */
5652 static void gen9_enable_rps(struct drm_i915_private *dev_priv)
5654 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
5656 /* Program defaults and thresholds for RPS*/
5657 I915_WRITE(GEN6_RC_VIDEO_FREQ,
5658 GEN9_FREQUENCY(dev_priv->rps.rp1_freq));
5660 /* 1 second timeout*/
5661 I915_WRITE(GEN6_RP_DOWN_TIMEOUT,
5662 GT_INTERVAL_FROM_US(dev_priv, 1000000));
5664 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 0xa);
5666 /* Leaning on the below call to gen6_set_rps to program/setup the
5667 * Up/Down EI & threshold registers, as well as the RP_CONTROL,
5668 * RP_INTERRUPT_LIMITS & RPNSWREQ registers */
5669 reset_rps(dev_priv, gen6_set_rps);
5671 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
5674 static void gen9_enable_rc6(struct drm_i915_private *dev_priv)
5676 struct intel_engine_cs *engine;
5677 enum intel_engine_id id;
5678 uint32_t rc6_mask = 0;
5680 /* 1a: Software RC state - RC0 */
5681 I915_WRITE(GEN6_RC_STATE, 0);
5683 /* 1b: Get forcewake during program sequence. Although the driver
5684 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
5685 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
5687 /* 2a: Disable RC states. */
5688 I915_WRITE(GEN6_RC_CONTROL, 0);
5690 /* 2b: Program RC6 thresholds.*/
5692 /* WaRsDoubleRc6WrlWithCoarsePowerGating: Doubling WRL only when CPG is enabled */
5693 if (IS_SKYLAKE(dev_priv))
5694 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 108 << 16);
5696 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 54 << 16);
5697 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
5698 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
5699 for_each_engine(engine, dev_priv, id)
5700 I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
5702 if (HAS_GUC(dev_priv))
5703 I915_WRITE(GUC_MAX_IDLE_COUNT, 0xA);
5705 I915_WRITE(GEN6_RC_SLEEP, 0);
5707 /* 2c: Program Coarse Power Gating Policies. */
5708 I915_WRITE(GEN9_MEDIA_PG_IDLE_HYSTERESIS, 25);
5709 I915_WRITE(GEN9_RENDER_PG_IDLE_HYSTERESIS, 25);
5711 /* 3a: Enable RC6 */
5712 if (intel_enable_rc6() & INTEL_RC6_ENABLE)
5713 rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
5714 DRM_INFO("RC6 %s\n", onoff(rc6_mask & GEN6_RC_CTL_RC6_ENABLE));
5715 I915_WRITE(GEN6_RC6_THRESHOLD, 37500); /* 37.5/125ms per EI */
5716 I915_WRITE(GEN6_RC_CONTROL,
5717 GEN6_RC_CTL_HW_ENABLE | GEN6_RC_CTL_EI_MODE(1) | rc6_mask);
5720 * 3b: Enable Coarse Power Gating only when RC6 is enabled.
5721 * WaRsDisableCoarsePowerGating:skl,bxt - Render/Media PG need to be disabled with RC6.
5723 if (NEEDS_WaRsDisableCoarsePowerGating(dev_priv))
5724 I915_WRITE(GEN9_PG_ENABLE, 0);
5726 I915_WRITE(GEN9_PG_ENABLE, (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ?
5727 (GEN9_RENDER_PG_ENABLE | GEN9_MEDIA_PG_ENABLE) : 0);
5729 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
5732 static void gen8_enable_rps(struct drm_i915_private *dev_priv)
5734 struct intel_engine_cs *engine;
5735 enum intel_engine_id id;
5736 uint32_t rc6_mask = 0;
5738 /* 1a: Software RC state - RC0 */
5739 I915_WRITE(GEN6_RC_STATE, 0);
5741 /* 1c & 1d: Get forcewake during program sequence. Although the driver
5742 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
5743 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
5745 /* 2a: Disable RC states. */
5746 I915_WRITE(GEN6_RC_CONTROL, 0);
5748 /* 2b: Program RC6 thresholds.*/
5749 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
5750 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
5751 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
5752 for_each_engine(engine, dev_priv, id)
5753 I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
5754 I915_WRITE(GEN6_RC_SLEEP, 0);
5755 if (IS_BROADWELL(dev_priv))
5756 I915_WRITE(GEN6_RC6_THRESHOLD, 625); /* 800us/1.28 for TO */
5758 I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */
5761 if (intel_enable_rc6() & INTEL_RC6_ENABLE)
5762 rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
5763 intel_print_rc6_info(dev_priv, rc6_mask);
5764 if (IS_BROADWELL(dev_priv))
5765 I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
5766 GEN7_RC_CTL_TO_MODE |
5769 I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
5770 GEN6_RC_CTL_EI_MODE(1) |
5773 /* 4 Program defaults and thresholds for RPS*/
5774 I915_WRITE(GEN6_RPNSWREQ,
5775 HSW_FREQUENCY(dev_priv->rps.rp1_freq));
5776 I915_WRITE(GEN6_RC_VIDEO_FREQ,
5777 HSW_FREQUENCY(dev_priv->rps.rp1_freq));
5778 /* NB: Docs say 1s, and 1000000 - which aren't equivalent */
5779 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */
5781 /* Docs recommend 900MHz, and 300 MHz respectively */
5782 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
5783 dev_priv->rps.max_freq_softlimit << 24 |
5784 dev_priv->rps.min_freq_softlimit << 16);
5786 I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */
5787 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/
5788 I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */
5789 I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */
5791 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
5794 I915_WRITE(GEN6_RP_CONTROL,
5795 GEN6_RP_MEDIA_TURBO |
5796 GEN6_RP_MEDIA_HW_NORMAL_MODE |
5797 GEN6_RP_MEDIA_IS_GFX |
5799 GEN6_RP_UP_BUSY_AVG |
5800 GEN6_RP_DOWN_IDLE_AVG);
5802 /* 6: Ring frequency + overclocking (our driver does this later */
5804 reset_rps(dev_priv, gen6_set_rps);
5806 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
5809 static void gen6_enable_rps(struct drm_i915_private *dev_priv)
5811 struct intel_engine_cs *engine;
5812 enum intel_engine_id id;
5813 u32 rc6vids, rc6_mask = 0;
5818 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5820 /* Here begins a magic sequence of register writes to enable
5821 * auto-downclocking.
5823 * Perhaps there might be some value in exposing these to
5826 I915_WRITE(GEN6_RC_STATE, 0);
5828 /* Clear the DBG now so we don't confuse earlier errors */
5829 gtfifodbg = I915_READ(GTFIFODBG);
5831 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
5832 I915_WRITE(GTFIFODBG, gtfifodbg);
5835 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
5837 /* disable the counters and set deterministic thresholds */
5838 I915_WRITE(GEN6_RC_CONTROL, 0);
5840 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
5841 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
5842 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
5843 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
5844 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
5846 for_each_engine(engine, dev_priv, id)
5847 I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
5849 I915_WRITE(GEN6_RC_SLEEP, 0);
5850 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
5851 if (IS_IVYBRIDGE(dev_priv))
5852 I915_WRITE(GEN6_RC6_THRESHOLD, 125000);
5854 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
5855 I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
5856 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
5858 /* Check if we are enabling RC6 */
5859 rc6_mode = intel_enable_rc6();
5860 if (rc6_mode & INTEL_RC6_ENABLE)
5861 rc6_mask |= GEN6_RC_CTL_RC6_ENABLE;
5863 /* We don't use those on Haswell */
5864 if (!IS_HASWELL(dev_priv)) {
5865 if (rc6_mode & INTEL_RC6p_ENABLE)
5866 rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
5868 if (rc6_mode & INTEL_RC6pp_ENABLE)
5869 rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
5872 intel_print_rc6_info(dev_priv, rc6_mask);
5874 I915_WRITE(GEN6_RC_CONTROL,
5876 GEN6_RC_CTL_EI_MODE(1) |
5877 GEN6_RC_CTL_HW_ENABLE);
5879 /* Power down if completely idle for over 50ms */
5880 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
5881 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
5883 reset_rps(dev_priv, gen6_set_rps);
5886 ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
5887 if (IS_GEN6(dev_priv) && ret) {
5888 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
5889 } else if (IS_GEN6(dev_priv) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
5890 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
5891 GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
5892 rc6vids &= 0xffff00;
5893 rc6vids |= GEN6_ENCODE_RC6_VID(450);
5894 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
5896 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
5899 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
5902 static void gen6_update_ring_freq(struct drm_i915_private *dev_priv)
5905 unsigned int gpu_freq;
5906 unsigned int max_ia_freq, min_ring_freq;
5907 unsigned int max_gpu_freq, min_gpu_freq;
5908 int scaling_factor = 180;
5909 struct cpufreq_policy *policy;
5911 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5913 policy = cpufreq_cpu_get(0);
5915 max_ia_freq = policy->cpuinfo.max_freq;
5916 cpufreq_cpu_put(policy);
5919 * Default to measured freq if none found, PCU will ensure we
5922 max_ia_freq = tsc_khz;
5925 /* Convert from kHz to MHz */
5926 max_ia_freq /= 1000;
5928 min_ring_freq = I915_READ(DCLK) & 0xf;
5929 /* convert DDR frequency from units of 266.6MHz to bandwidth */
5930 min_ring_freq = mult_frac(min_ring_freq, 8, 3);
5932 if (IS_GEN9_BC(dev_priv)) {
5933 /* Convert GT frequency to 50 HZ units */
5934 min_gpu_freq = dev_priv->rps.min_freq / GEN9_FREQ_SCALER;
5935 max_gpu_freq = dev_priv->rps.max_freq / GEN9_FREQ_SCALER;
5937 min_gpu_freq = dev_priv->rps.min_freq;
5938 max_gpu_freq = dev_priv->rps.max_freq;
5942 * For each potential GPU frequency, load a ring frequency we'd like
5943 * to use for memory access. We do this by specifying the IA frequency
5944 * the PCU should use as a reference to determine the ring frequency.
5946 for (gpu_freq = max_gpu_freq; gpu_freq >= min_gpu_freq; gpu_freq--) {
5947 int diff = max_gpu_freq - gpu_freq;
5948 unsigned int ia_freq = 0, ring_freq = 0;
5950 if (IS_GEN9_BC(dev_priv)) {
5952 * ring_freq = 2 * GT. ring_freq is in 100MHz units
5953 * No floor required for ring frequency on SKL.
5955 ring_freq = gpu_freq;
5956 } else if (INTEL_INFO(dev_priv)->gen >= 8) {
5957 /* max(2 * GT, DDR). NB: GT is 50MHz units */
5958 ring_freq = max(min_ring_freq, gpu_freq);
5959 } else if (IS_HASWELL(dev_priv)) {
5960 ring_freq = mult_frac(gpu_freq, 5, 4);
5961 ring_freq = max(min_ring_freq, ring_freq);
5962 /* leave ia_freq as the default, chosen by cpufreq */
5964 /* On older processors, there is no separate ring
5965 * clock domain, so in order to boost the bandwidth
5966 * of the ring, we need to upclock the CPU (ia_freq).
5968 * For GPU frequencies less than 750MHz,
5969 * just use the lowest ring freq.
5971 if (gpu_freq < min_freq)
5974 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
5975 ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
5978 sandybridge_pcode_write(dev_priv,
5979 GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
5980 ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
5981 ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
5986 static int cherryview_rps_max_freq(struct drm_i915_private *dev_priv)
5990 val = vlv_punit_read(dev_priv, FB_GFX_FMAX_AT_VMAX_FUSE);
5992 switch (INTEL_INFO(dev_priv)->sseu.eu_total) {
5994 /* (2 * 4) config */
5995 rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS4EU_FUSE_SHIFT);
5998 /* (2 * 6) config */
5999 rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS6EU_FUSE_SHIFT);
6002 /* (2 * 8) config */
6004 /* Setting (2 * 8) Min RP0 for any other combination */
6005 rp0 = (val >> FB_GFX_FMAX_AT_VMAX_2SS8EU_FUSE_SHIFT);
6009 rp0 = (rp0 & FB_GFX_FREQ_FUSE_MASK);
6014 static int cherryview_rps_rpe_freq(struct drm_i915_private *dev_priv)
6018 val = vlv_punit_read(dev_priv, PUNIT_GPU_DUTYCYCLE_REG);
6019 rpe = (val >> PUNIT_GPU_DUTYCYCLE_RPE_FREQ_SHIFT) & PUNIT_GPU_DUTYCYCLE_RPE_FREQ_MASK;
6024 static int cherryview_rps_guar_freq(struct drm_i915_private *dev_priv)
6028 val = vlv_punit_read(dev_priv, FB_GFX_FMAX_AT_VMAX_FUSE);
6029 rp1 = (val & FB_GFX_FREQ_FUSE_MASK);
6034 static u32 cherryview_rps_min_freq(struct drm_i915_private *dev_priv)
6038 val = vlv_punit_read(dev_priv, FB_GFX_FMIN_AT_VMIN_FUSE);
6039 rpn = ((val >> FB_GFX_FMIN_AT_VMIN_FUSE_SHIFT) &
6040 FB_GFX_FREQ_FUSE_MASK);
6045 static int valleyview_rps_guar_freq(struct drm_i915_private *dev_priv)
6049 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
6051 rp1 = (val & FB_GFX_FGUARANTEED_FREQ_FUSE_MASK) >> FB_GFX_FGUARANTEED_FREQ_FUSE_SHIFT;
6056 static int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
6060 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
6062 rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
6064 rp0 = min_t(u32, rp0, 0xea);
6069 static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
6073 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
6074 rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
6075 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
6076 rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
6081 static int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
6085 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
6087 * According to the BYT Punit GPU turbo HAS 1.1.6.3 the minimum value
6088 * for the minimum frequency in GPLL mode is 0xc1. Contrary to this on
6089 * a BYT-M B0 the above register contains 0xbf. Moreover when setting
6090 * a frequency Punit will not allow values below 0xc0. Clamp it 0xc0
6091 * to make sure it matches what Punit accepts.
6093 return max_t(u32, val, 0xc0);
6096 /* Check that the pctx buffer wasn't move under us. */
6097 static void valleyview_check_pctx(struct drm_i915_private *dev_priv)
6099 unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
6101 WARN_ON(pctx_addr != dev_priv->mm.stolen_base +
6102 dev_priv->vlv_pctx->stolen->start);
6106 /* Check that the pcbr address is not empty. */
6107 static void cherryview_check_pctx(struct drm_i915_private *dev_priv)
6109 unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
6111 WARN_ON((pctx_addr >> VLV_PCBR_ADDR_SHIFT) == 0);
6114 static void cherryview_setup_pctx(struct drm_i915_private *dev_priv)
6116 struct i915_ggtt *ggtt = &dev_priv->ggtt;
6117 unsigned long pctx_paddr, paddr;
6119 int pctx_size = 32*1024;
6121 pcbr = I915_READ(VLV_PCBR);
6122 if ((pcbr >> VLV_PCBR_ADDR_SHIFT) == 0) {
6123 DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
6124 paddr = (dev_priv->mm.stolen_base +
6125 (ggtt->stolen_size - pctx_size));
6127 pctx_paddr = (paddr & (~4095));
6128 I915_WRITE(VLV_PCBR, pctx_paddr);
6131 DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR));
6134 static void valleyview_setup_pctx(struct drm_i915_private *dev_priv)
6136 struct drm_i915_gem_object *pctx;
6137 unsigned long pctx_paddr;
6139 int pctx_size = 24*1024;
6141 pcbr = I915_READ(VLV_PCBR);
6143 /* BIOS set it up already, grab the pre-alloc'd space */
6146 pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
6147 pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv,
6149 I915_GTT_OFFSET_NONE,
6154 DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
6157 * From the Gunit register HAS:
6158 * The Gfx driver is expected to program this register and ensure
6159 * proper allocation within Gfx stolen memory. For example, this
6160 * register should be programmed such than the PCBR range does not
6161 * overlap with other ranges, such as the frame buffer, protected
6162 * memory, or any other relevant ranges.
6164 pctx = i915_gem_object_create_stolen(dev_priv, pctx_size);
6166 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
6170 pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
6171 I915_WRITE(VLV_PCBR, pctx_paddr);
6174 DRM_DEBUG_DRIVER("PCBR: 0x%08x\n", I915_READ(VLV_PCBR));
6175 dev_priv->vlv_pctx = pctx;
6178 static void valleyview_cleanup_pctx(struct drm_i915_private *dev_priv)
6180 if (WARN_ON(!dev_priv->vlv_pctx))
6183 i915_gem_object_put(dev_priv->vlv_pctx);
6184 dev_priv->vlv_pctx = NULL;
6187 static void vlv_init_gpll_ref_freq(struct drm_i915_private *dev_priv)
6189 dev_priv->rps.gpll_ref_freq =
6190 vlv_get_cck_clock(dev_priv, "GPLL ref",
6191 CCK_GPLL_CLOCK_CONTROL,
6192 dev_priv->czclk_freq);
6194 DRM_DEBUG_DRIVER("GPLL reference freq: %d kHz\n",
6195 dev_priv->rps.gpll_ref_freq);
6198 static void valleyview_init_gt_powersave(struct drm_i915_private *dev_priv)
6202 valleyview_setup_pctx(dev_priv);
6204 vlv_init_gpll_ref_freq(dev_priv);
6206 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
6207 switch ((val >> 6) & 3) {
6210 dev_priv->mem_freq = 800;
6213 dev_priv->mem_freq = 1066;
6216 dev_priv->mem_freq = 1333;
6219 DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv->mem_freq);
6221 dev_priv->rps.max_freq = valleyview_rps_max_freq(dev_priv);
6222 dev_priv->rps.rp0_freq = dev_priv->rps.max_freq;
6223 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
6224 intel_gpu_freq(dev_priv, dev_priv->rps.max_freq),
6225 dev_priv->rps.max_freq);
6227 dev_priv->rps.efficient_freq = valleyview_rps_rpe_freq(dev_priv);
6228 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
6229 intel_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
6230 dev_priv->rps.efficient_freq);
6232 dev_priv->rps.rp1_freq = valleyview_rps_guar_freq(dev_priv);
6233 DRM_DEBUG_DRIVER("RP1(Guar Freq) GPU freq: %d MHz (%u)\n",
6234 intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq),
6235 dev_priv->rps.rp1_freq);
6237 dev_priv->rps.min_freq = valleyview_rps_min_freq(dev_priv);
6238 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
6239 intel_gpu_freq(dev_priv, dev_priv->rps.min_freq),
6240 dev_priv->rps.min_freq);
6243 static void cherryview_init_gt_powersave(struct drm_i915_private *dev_priv)
6247 cherryview_setup_pctx(dev_priv);
6249 vlv_init_gpll_ref_freq(dev_priv);
6251 mutex_lock(&dev_priv->sb_lock);
6252 val = vlv_cck_read(dev_priv, CCK_FUSE_REG);
6253 mutex_unlock(&dev_priv->sb_lock);
6255 switch ((val >> 2) & 0x7) {
6257 dev_priv->mem_freq = 2000;
6260 dev_priv->mem_freq = 1600;
6263 DRM_DEBUG_DRIVER("DDR speed: %d MHz\n", dev_priv->mem_freq);
6265 dev_priv->rps.max_freq = cherryview_rps_max_freq(dev_priv);
6266 dev_priv->rps.rp0_freq = dev_priv->rps.max_freq;
6267 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
6268 intel_gpu_freq(dev_priv, dev_priv->rps.max_freq),
6269 dev_priv->rps.max_freq);
6271 dev_priv->rps.efficient_freq = cherryview_rps_rpe_freq(dev_priv);
6272 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
6273 intel_gpu_freq(dev_priv, dev_priv->rps.efficient_freq),
6274 dev_priv->rps.efficient_freq);
6276 dev_priv->rps.rp1_freq = cherryview_rps_guar_freq(dev_priv);
6277 DRM_DEBUG_DRIVER("RP1(Guar) GPU freq: %d MHz (%u)\n",
6278 intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq),
6279 dev_priv->rps.rp1_freq);
6281 dev_priv->rps.min_freq = cherryview_rps_min_freq(dev_priv);
6282 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
6283 intel_gpu_freq(dev_priv, dev_priv->rps.min_freq),
6284 dev_priv->rps.min_freq);
6286 WARN_ONCE((dev_priv->rps.max_freq |
6287 dev_priv->rps.efficient_freq |
6288 dev_priv->rps.rp1_freq |
6289 dev_priv->rps.min_freq) & 1,
6290 "Odd GPU freq values\n");
6293 static void valleyview_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
6295 valleyview_cleanup_pctx(dev_priv);
6298 static void cherryview_enable_rps(struct drm_i915_private *dev_priv)
6300 struct intel_engine_cs *engine;
6301 enum intel_engine_id id;
6302 u32 gtfifodbg, val, rc6_mode = 0, pcbr;
6304 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
6306 gtfifodbg = I915_READ(GTFIFODBG) & ~(GT_FIFO_SBDEDICATE_FREE_ENTRY_CHV |
6307 GT_FIFO_FREE_ENTRIES_CHV);
6309 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
6311 I915_WRITE(GTFIFODBG, gtfifodbg);
6314 cherryview_check_pctx(dev_priv);
6316 /* 1a & 1b: Get forcewake during program sequence. Although the driver
6317 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
6318 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
6320 /* Disable RC states. */
6321 I915_WRITE(GEN6_RC_CONTROL, 0);
6323 /* 2a: Program RC6 thresholds.*/
6324 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
6325 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
6326 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
6328 for_each_engine(engine, dev_priv, id)
6329 I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
6330 I915_WRITE(GEN6_RC_SLEEP, 0);
6332 /* TO threshold set to 500 us ( 0x186 * 1.28 us) */
6333 I915_WRITE(GEN6_RC6_THRESHOLD, 0x186);
6335 /* allows RC6 residency counter to work */
6336 I915_WRITE(VLV_COUNTER_CONTROL,
6337 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
6338 VLV_MEDIA_RC6_COUNT_EN |
6339 VLV_RENDER_RC6_COUNT_EN));
6341 /* For now we assume BIOS is allocating and populating the PCBR */
6342 pcbr = I915_READ(VLV_PCBR);
6345 if ((intel_enable_rc6() & INTEL_RC6_ENABLE) &&
6346 (pcbr >> VLV_PCBR_ADDR_SHIFT))
6347 rc6_mode = GEN7_RC_CTL_TO_MODE;
6349 I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
6351 /* 4 Program defaults and thresholds for RPS*/
6352 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
6353 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
6354 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
6355 I915_WRITE(GEN6_RP_UP_EI, 66000);
6356 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
6358 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
6361 I915_WRITE(GEN6_RP_CONTROL,
6362 GEN6_RP_MEDIA_HW_NORMAL_MODE |
6363 GEN6_RP_MEDIA_IS_GFX |
6365 GEN6_RP_UP_BUSY_AVG |
6366 GEN6_RP_DOWN_IDLE_AVG);
6368 /* Setting Fixed Bias */
6369 val = VLV_OVERRIDE_EN |
6371 CHV_BIAS_CPU_50_SOC_50;
6372 vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
6374 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
6376 /* RPS code assumes GPLL is used */
6377 WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
6379 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
6380 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
6382 reset_rps(dev_priv, valleyview_set_rps);
6384 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
6387 static void valleyview_enable_rps(struct drm_i915_private *dev_priv)
6389 struct intel_engine_cs *engine;
6390 enum intel_engine_id id;
6391 u32 gtfifodbg, val, rc6_mode = 0;
6393 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
6395 valleyview_check_pctx(dev_priv);
6397 gtfifodbg = I915_READ(GTFIFODBG);
6399 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
6401 I915_WRITE(GTFIFODBG, gtfifodbg);
6404 /* If VLV, Forcewake all wells, else re-direct to regular path */
6405 intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
6407 /* Disable RC states. */
6408 I915_WRITE(GEN6_RC_CONTROL, 0);
6410 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
6411 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
6412 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
6413 I915_WRITE(GEN6_RP_UP_EI, 66000);
6414 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
6416 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
6418 I915_WRITE(GEN6_RP_CONTROL,
6419 GEN6_RP_MEDIA_TURBO |
6420 GEN6_RP_MEDIA_HW_NORMAL_MODE |
6421 GEN6_RP_MEDIA_IS_GFX |
6423 GEN6_RP_UP_BUSY_AVG |
6424 GEN6_RP_DOWN_IDLE_CONT);
6426 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
6427 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
6428 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
6430 for_each_engine(engine, dev_priv, id)
6431 I915_WRITE(RING_MAX_IDLE(engine->mmio_base), 10);
6433 I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
6435 /* allows RC6 residency counter to work */
6436 I915_WRITE(VLV_COUNTER_CONTROL,
6437 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
6438 VLV_MEDIA_RC0_COUNT_EN |
6439 VLV_RENDER_RC0_COUNT_EN |
6440 VLV_MEDIA_RC6_COUNT_EN |
6441 VLV_RENDER_RC6_COUNT_EN));
6443 if (intel_enable_rc6() & INTEL_RC6_ENABLE)
6444 rc6_mode = GEN7_RC_CTL_TO_MODE | VLV_RC_CTL_CTX_RST_PARALLEL;
6446 intel_print_rc6_info(dev_priv, rc6_mode);
6448 I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
6450 /* Setting Fixed Bias */
6451 val = VLV_OVERRIDE_EN |
6453 VLV_BIAS_CPU_125_SOC_875;
6454 vlv_punit_write(dev_priv, VLV_TURBO_SOC_OVERRIDE, val);
6456 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
6458 /* RPS code assumes GPLL is used */
6459 WARN_ONCE((val & GPLLENABLE) == 0, "GPLL not enabled\n");
6461 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", yesno(val & GPLLENABLE));
6462 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
6464 reset_rps(dev_priv, valleyview_set_rps);
6466 intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
6469 static unsigned long intel_pxfreq(u32 vidfreq)
6472 int div = (vidfreq & 0x3f0000) >> 16;
6473 int post = (vidfreq & 0x3000) >> 12;
6474 int pre = (vidfreq & 0x7);
6479 freq = ((div * 133333) / ((1<<post) * pre));
6484 static const struct cparams {
6490 { 1, 1333, 301, 28664 },
6491 { 1, 1066, 294, 24460 },
6492 { 1, 800, 294, 25192 },
6493 { 0, 1333, 276, 27605 },
6494 { 0, 1066, 276, 27605 },
6495 { 0, 800, 231, 23784 },
6498 static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
6500 u64 total_count, diff, ret;
6501 u32 count1, count2, count3, m = 0, c = 0;
6502 unsigned long now = jiffies_to_msecs(jiffies), diff1;
6505 lockdep_assert_held(&mchdev_lock);
6507 diff1 = now - dev_priv->ips.last_time1;
6509 /* Prevent division-by-zero if we are asking too fast.
6510 * Also, we don't get interesting results if we are polling
6511 * faster than once in 10ms, so just return the saved value
6515 return dev_priv->ips.chipset_power;
6517 count1 = I915_READ(DMIEC);
6518 count2 = I915_READ(DDREC);
6519 count3 = I915_READ(CSIEC);
6521 total_count = count1 + count2 + count3;
6523 /* FIXME: handle per-counter overflow */
6524 if (total_count < dev_priv->ips.last_count1) {
6525 diff = ~0UL - dev_priv->ips.last_count1;
6526 diff += total_count;
6528 diff = total_count - dev_priv->ips.last_count1;
6531 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
6532 if (cparams[i].i == dev_priv->ips.c_m &&
6533 cparams[i].t == dev_priv->ips.r_t) {
6540 diff = div_u64(diff, diff1);
6541 ret = ((m * diff) + c);
6542 ret = div_u64(ret, 10);
6544 dev_priv->ips.last_count1 = total_count;
6545 dev_priv->ips.last_time1 = now;
6547 dev_priv->ips.chipset_power = ret;
6552 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
6556 if (INTEL_INFO(dev_priv)->gen != 5)
6559 spin_lock_irq(&mchdev_lock);
6561 val = __i915_chipset_val(dev_priv);
6563 spin_unlock_irq(&mchdev_lock);
6568 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
6570 unsigned long m, x, b;
6573 tsfs = I915_READ(TSFS);
6575 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
6576 x = I915_READ8(TR1);
6578 b = tsfs & TSFS_INTR_MASK;
6580 return ((m * x) / 127) - b;
6583 static int _pxvid_to_vd(u8 pxvid)
6588 if (pxvid >= 8 && pxvid < 31)
6591 return (pxvid + 2) * 125;
6594 static u32 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
6596 const int vd = _pxvid_to_vd(pxvid);
6597 const int vm = vd - 1125;
6599 if (INTEL_INFO(dev_priv)->is_mobile)
6600 return vm > 0 ? vm : 0;
6605 static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
6607 u64 now, diff, diffms;
6610 lockdep_assert_held(&mchdev_lock);
6612 now = ktime_get_raw_ns();
6613 diffms = now - dev_priv->ips.last_time2;
6614 do_div(diffms, NSEC_PER_MSEC);
6616 /* Don't divide by 0 */
6620 count = I915_READ(GFXEC);
6622 if (count < dev_priv->ips.last_count2) {
6623 diff = ~0UL - dev_priv->ips.last_count2;
6626 diff = count - dev_priv->ips.last_count2;
6629 dev_priv->ips.last_count2 = count;
6630 dev_priv->ips.last_time2 = now;
6632 /* More magic constants... */
6634 diff = div_u64(diff, diffms * 10);
6635 dev_priv->ips.gfx_power = diff;
6638 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
6640 if (INTEL_INFO(dev_priv)->gen != 5)
6643 spin_lock_irq(&mchdev_lock);
6645 __i915_update_gfx_val(dev_priv);
6647 spin_unlock_irq(&mchdev_lock);
6650 static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
6652 unsigned long t, corr, state1, corr2, state2;
6655 lockdep_assert_held(&mchdev_lock);
6657 pxvid = I915_READ(PXVFREQ(dev_priv->rps.cur_freq));
6658 pxvid = (pxvid >> 24) & 0x7f;
6659 ext_v = pvid_to_extvid(dev_priv, pxvid);
6663 t = i915_mch_val(dev_priv);
6665 /* Revel in the empirically derived constants */
6667 /* Correction factor in 1/100000 units */
6669 corr = ((t * 2349) + 135940);
6671 corr = ((t * 964) + 29317);
6673 corr = ((t * 301) + 1004);
6675 corr = corr * ((150142 * state1) / 10000 - 78642);
6677 corr2 = (corr * dev_priv->ips.corr);
6679 state2 = (corr2 * state1) / 10000;
6680 state2 /= 100; /* convert to mW */
6682 __i915_update_gfx_val(dev_priv);
6684 return dev_priv->ips.gfx_power + state2;
6687 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
6691 if (INTEL_INFO(dev_priv)->gen != 5)
6694 spin_lock_irq(&mchdev_lock);
6696 val = __i915_gfx_val(dev_priv);
6698 spin_unlock_irq(&mchdev_lock);
6704 * i915_read_mch_val - return value for IPS use
6706 * Calculate and return a value for the IPS driver to use when deciding whether
6707 * we have thermal and power headroom to increase CPU or GPU power budget.
6709 unsigned long i915_read_mch_val(void)
6711 struct drm_i915_private *dev_priv;
6712 unsigned long chipset_val, graphics_val, ret = 0;
6714 spin_lock_irq(&mchdev_lock);
6717 dev_priv = i915_mch_dev;
6719 chipset_val = __i915_chipset_val(dev_priv);
6720 graphics_val = __i915_gfx_val(dev_priv);
6722 ret = chipset_val + graphics_val;
6725 spin_unlock_irq(&mchdev_lock);
6729 EXPORT_SYMBOL_GPL(i915_read_mch_val);
6732 * i915_gpu_raise - raise GPU frequency limit
6734 * Raise the limit; IPS indicates we have thermal headroom.
6736 bool i915_gpu_raise(void)
6738 struct drm_i915_private *dev_priv;
6741 spin_lock_irq(&mchdev_lock);
6742 if (!i915_mch_dev) {
6746 dev_priv = i915_mch_dev;
6748 if (dev_priv->ips.max_delay > dev_priv->ips.fmax)
6749 dev_priv->ips.max_delay--;
6752 spin_unlock_irq(&mchdev_lock);
6756 EXPORT_SYMBOL_GPL(i915_gpu_raise);
6759 * i915_gpu_lower - lower GPU frequency limit
6761 * IPS indicates we're close to a thermal limit, so throttle back the GPU
6762 * frequency maximum.
6764 bool i915_gpu_lower(void)
6766 struct drm_i915_private *dev_priv;
6769 spin_lock_irq(&mchdev_lock);
6770 if (!i915_mch_dev) {
6774 dev_priv = i915_mch_dev;
6776 if (dev_priv->ips.max_delay < dev_priv->ips.min_delay)
6777 dev_priv->ips.max_delay++;
6780 spin_unlock_irq(&mchdev_lock);
6784 EXPORT_SYMBOL_GPL(i915_gpu_lower);
6787 * i915_gpu_busy - indicate GPU business to IPS
6789 * Tell the IPS driver whether or not the GPU is busy.
6791 bool i915_gpu_busy(void)
6795 spin_lock_irq(&mchdev_lock);
6797 ret = i915_mch_dev->gt.awake;
6798 spin_unlock_irq(&mchdev_lock);
6802 EXPORT_SYMBOL_GPL(i915_gpu_busy);
6805 * i915_gpu_turbo_disable - disable graphics turbo
6807 * Disable graphics turbo by resetting the max frequency and setting the
6808 * current frequency to the default.
6810 bool i915_gpu_turbo_disable(void)
6812 struct drm_i915_private *dev_priv;
6815 spin_lock_irq(&mchdev_lock);
6816 if (!i915_mch_dev) {
6820 dev_priv = i915_mch_dev;
6822 dev_priv->ips.max_delay = dev_priv->ips.fstart;
6824 if (!ironlake_set_drps(dev_priv, dev_priv->ips.fstart))
6828 spin_unlock_irq(&mchdev_lock);
6832 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
6835 * Tells the intel_ips driver that the i915 driver is now loaded, if
6836 * IPS got loaded first.
6838 * This awkward dance is so that neither module has to depend on the
6839 * other in order for IPS to do the appropriate communication of
6840 * GPU turbo limits to i915.
6843 ips_ping_for_i915_load(void)
6847 link = symbol_get(ips_link_to_i915_driver);
6850 symbol_put(ips_link_to_i915_driver);
6854 void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
6856 /* We only register the i915 ips part with intel-ips once everything is
6857 * set up, to avoid intel-ips sneaking in and reading bogus values. */
6858 spin_lock_irq(&mchdev_lock);
6859 i915_mch_dev = dev_priv;
6860 spin_unlock_irq(&mchdev_lock);
6862 ips_ping_for_i915_load();
6865 void intel_gpu_ips_teardown(void)
6867 spin_lock_irq(&mchdev_lock);
6868 i915_mch_dev = NULL;
6869 spin_unlock_irq(&mchdev_lock);
6872 static void intel_init_emon(struct drm_i915_private *dev_priv)
6878 /* Disable to program */
6882 /* Program energy weights for various events */
6883 I915_WRITE(SDEW, 0x15040d00);
6884 I915_WRITE(CSIEW0, 0x007f0000);
6885 I915_WRITE(CSIEW1, 0x1e220004);
6886 I915_WRITE(CSIEW2, 0x04000004);
6888 for (i = 0; i < 5; i++)
6889 I915_WRITE(PEW(i), 0);
6890 for (i = 0; i < 3; i++)
6891 I915_WRITE(DEW(i), 0);
6893 /* Program P-state weights to account for frequency power adjustment */
6894 for (i = 0; i < 16; i++) {
6895 u32 pxvidfreq = I915_READ(PXVFREQ(i));
6896 unsigned long freq = intel_pxfreq(pxvidfreq);
6897 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
6902 val *= (freq / 1000);
6904 val /= (127*127*900);
6906 DRM_ERROR("bad pxval: %ld\n", val);
6909 /* Render standby states get 0 weight */
6913 for (i = 0; i < 4; i++) {
6914 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
6915 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
6916 I915_WRITE(PXW(i), val);
6919 /* Adjust magic regs to magic values (more experimental results) */
6920 I915_WRITE(OGW0, 0);
6921 I915_WRITE(OGW1, 0);
6922 I915_WRITE(EG0, 0x00007f00);
6923 I915_WRITE(EG1, 0x0000000e);
6924 I915_WRITE(EG2, 0x000e0000);
6925 I915_WRITE(EG3, 0x68000300);
6926 I915_WRITE(EG4, 0x42000000);
6927 I915_WRITE(EG5, 0x00140031);
6931 for (i = 0; i < 8; i++)
6932 I915_WRITE(PXWL(i), 0);
6934 /* Enable PMON + select events */
6935 I915_WRITE(ECR, 0x80000019);
6937 lcfuse = I915_READ(LCFUSE02);
6939 dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
6942 void intel_init_gt_powersave(struct drm_i915_private *dev_priv)
6945 * RPM depends on RC6 to save restore the GT HW context, so make RC6 a
6948 if (!i915.enable_rc6) {
6949 DRM_INFO("RC6 disabled, disabling runtime PM support\n");
6950 intel_runtime_pm_get(dev_priv);
6953 mutex_lock(&dev_priv->drm.struct_mutex);
6954 mutex_lock(&dev_priv->rps.hw_lock);
6956 /* Initialize RPS limits (for userspace) */
6957 if (IS_CHERRYVIEW(dev_priv))
6958 cherryview_init_gt_powersave(dev_priv);
6959 else if (IS_VALLEYVIEW(dev_priv))
6960 valleyview_init_gt_powersave(dev_priv);
6961 else if (INTEL_GEN(dev_priv) >= 6)
6962 gen6_init_rps_frequencies(dev_priv);
6964 /* Derive initial user preferences/limits from the hardware limits */
6965 dev_priv->rps.idle_freq = dev_priv->rps.min_freq;
6966 dev_priv->rps.cur_freq = dev_priv->rps.idle_freq;
6968 dev_priv->rps.max_freq_softlimit = dev_priv->rps.max_freq;
6969 dev_priv->rps.min_freq_softlimit = dev_priv->rps.min_freq;
6971 if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
6972 dev_priv->rps.min_freq_softlimit =
6974 dev_priv->rps.efficient_freq,
6975 intel_freq_opcode(dev_priv, 450));
6977 /* After setting max-softlimit, find the overclock max freq */
6978 if (IS_GEN6(dev_priv) ||
6979 IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv)) {
6982 sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, ¶ms);
6983 if (params & BIT(31)) { /* OC supported */
6984 DRM_DEBUG_DRIVER("Overclocking supported, max: %dMHz, overclock: %dMHz\n",
6985 (dev_priv->rps.max_freq & 0xff) * 50,
6986 (params & 0xff) * 50);
6987 dev_priv->rps.max_freq = params & 0xff;
6991 /* Finally allow us to boost to max by default */
6992 dev_priv->rps.boost_freq = dev_priv->rps.max_freq;
6994 mutex_unlock(&dev_priv->rps.hw_lock);
6995 mutex_unlock(&dev_priv->drm.struct_mutex);
6997 intel_autoenable_gt_powersave(dev_priv);
7000 void intel_cleanup_gt_powersave(struct drm_i915_private *dev_priv)
7002 if (IS_VALLEYVIEW(dev_priv))
7003 valleyview_cleanup_gt_powersave(dev_priv);
7005 if (!i915.enable_rc6)
7006 intel_runtime_pm_put(dev_priv);
7010 * intel_suspend_gt_powersave - suspend PM work and helper threads
7011 * @dev_priv: i915 device
7013 * We don't want to disable RC6 or other features here, we just want
7014 * to make sure any work we've queued has finished and won't bother
7015 * us while we're suspended.
7017 void intel_suspend_gt_powersave(struct drm_i915_private *dev_priv)
7019 if (INTEL_GEN(dev_priv) < 6)
7022 if (cancel_delayed_work_sync(&dev_priv->rps.autoenable_work))
7023 intel_runtime_pm_put(dev_priv);
7025 /* gen6_rps_idle() will be called later to disable interrupts */
7028 void intel_sanitize_gt_powersave(struct drm_i915_private *dev_priv)
7030 dev_priv->rps.enabled = true; /* force disabling */
7031 intel_disable_gt_powersave(dev_priv);
7033 gen6_reset_rps_interrupts(dev_priv);
7036 void intel_disable_gt_powersave(struct drm_i915_private *dev_priv)
7038 if (!READ_ONCE(dev_priv->rps.enabled))
7041 mutex_lock(&dev_priv->rps.hw_lock);
7043 if (INTEL_GEN(dev_priv) >= 9) {
7044 gen9_disable_rc6(dev_priv);
7045 gen9_disable_rps(dev_priv);
7046 } else if (IS_CHERRYVIEW(dev_priv)) {
7047 cherryview_disable_rps(dev_priv);
7048 } else if (IS_VALLEYVIEW(dev_priv)) {
7049 valleyview_disable_rps(dev_priv);
7050 } else if (INTEL_GEN(dev_priv) >= 6) {
7051 gen6_disable_rps(dev_priv);
7052 } else if (IS_IRONLAKE_M(dev_priv)) {
7053 ironlake_disable_drps(dev_priv);
7056 dev_priv->rps.enabled = false;
7057 mutex_unlock(&dev_priv->rps.hw_lock);
7060 void intel_enable_gt_powersave(struct drm_i915_private *dev_priv)
7062 /* We shouldn't be disabling as we submit, so this should be less
7063 * racy than it appears!
7065 if (READ_ONCE(dev_priv->rps.enabled))
7068 /* Powersaving is controlled by the host when inside a VM */
7069 if (intel_vgpu_active(dev_priv))
7072 mutex_lock(&dev_priv->rps.hw_lock);
7074 if (IS_CHERRYVIEW(dev_priv)) {
7075 cherryview_enable_rps(dev_priv);
7076 } else if (IS_VALLEYVIEW(dev_priv)) {
7077 valleyview_enable_rps(dev_priv);
7078 } else if (INTEL_GEN(dev_priv) >= 9) {
7079 gen9_enable_rc6(dev_priv);
7080 gen9_enable_rps(dev_priv);
7081 if (IS_GEN9_BC(dev_priv))
7082 gen6_update_ring_freq(dev_priv);
7083 } else if (IS_BROADWELL(dev_priv)) {
7084 gen8_enable_rps(dev_priv);
7085 gen6_update_ring_freq(dev_priv);
7086 } else if (INTEL_GEN(dev_priv) >= 6) {
7087 gen6_enable_rps(dev_priv);
7088 gen6_update_ring_freq(dev_priv);
7089 } else if (IS_IRONLAKE_M(dev_priv)) {
7090 ironlake_enable_drps(dev_priv);
7091 intel_init_emon(dev_priv);
7094 WARN_ON(dev_priv->rps.max_freq < dev_priv->rps.min_freq);
7095 WARN_ON(dev_priv->rps.idle_freq > dev_priv->rps.max_freq);
7097 WARN_ON(dev_priv->rps.efficient_freq < dev_priv->rps.min_freq);
7098 WARN_ON(dev_priv->rps.efficient_freq > dev_priv->rps.max_freq);
7100 dev_priv->rps.enabled = true;
7101 mutex_unlock(&dev_priv->rps.hw_lock);
7104 static void __intel_autoenable_gt_powersave(struct work_struct *work)
7106 struct drm_i915_private *dev_priv =
7107 container_of(work, typeof(*dev_priv), rps.autoenable_work.work);
7108 struct intel_engine_cs *rcs;
7109 struct drm_i915_gem_request *req;
7111 if (READ_ONCE(dev_priv->rps.enabled))
7114 rcs = dev_priv->engine[RCS];
7115 if (rcs->last_retired_context)
7118 if (!rcs->init_context)
7121 mutex_lock(&dev_priv->drm.struct_mutex);
7123 req = i915_gem_request_alloc(rcs, dev_priv->kernel_context);
7127 if (!i915.enable_execlists && i915_switch_context(req) == 0)
7128 rcs->init_context(req);
7130 /* Mark the device busy, calling intel_enable_gt_powersave() */
7131 i915_add_request(req);
7134 mutex_unlock(&dev_priv->drm.struct_mutex);
7136 intel_runtime_pm_put(dev_priv);
7139 void intel_autoenable_gt_powersave(struct drm_i915_private *dev_priv)
7141 if (READ_ONCE(dev_priv->rps.enabled))
7144 if (IS_IRONLAKE_M(dev_priv)) {
7145 ironlake_enable_drps(dev_priv);
7146 intel_init_emon(dev_priv);
7147 } else if (INTEL_INFO(dev_priv)->gen >= 6) {
7149 * PCU communication is slow and this doesn't need to be
7150 * done at any specific time, so do this out of our fast path
7151 * to make resume and init faster.
7153 * We depend on the HW RC6 power context save/restore
7154 * mechanism when entering D3 through runtime PM suspend. So
7155 * disable RPM until RPS/RC6 is properly setup. We can only
7156 * get here via the driver load/system resume/runtime resume
7157 * paths, so the _noresume version is enough (and in case of
7158 * runtime resume it's necessary).
7160 if (queue_delayed_work(dev_priv->wq,
7161 &dev_priv->rps.autoenable_work,
7162 round_jiffies_up_relative(HZ)))
7163 intel_runtime_pm_get_noresume(dev_priv);
7167 static void ibx_init_clock_gating(struct drm_i915_private *dev_priv)
7170 * On Ibex Peak and Cougar Point, we need to disable clock
7171 * gating for the panel power sequencer or it will fail to
7172 * start up when no ports are active.
7174 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
7177 static void g4x_disable_trickle_feed(struct drm_i915_private *dev_priv)
7181 for_each_pipe(dev_priv, pipe) {
7182 I915_WRITE(DSPCNTR(pipe),
7183 I915_READ(DSPCNTR(pipe)) |
7184 DISPPLANE_TRICKLE_FEED_DISABLE);
7186 I915_WRITE(DSPSURF(pipe), I915_READ(DSPSURF(pipe)));
7187 POSTING_READ(DSPSURF(pipe));
7191 static void ilk_init_lp_watermarks(struct drm_i915_private *dev_priv)
7193 I915_WRITE(WM3_LP_ILK, I915_READ(WM3_LP_ILK) & ~WM1_LP_SR_EN);
7194 I915_WRITE(WM2_LP_ILK, I915_READ(WM2_LP_ILK) & ~WM1_LP_SR_EN);
7195 I915_WRITE(WM1_LP_ILK, I915_READ(WM1_LP_ILK) & ~WM1_LP_SR_EN);
7198 * Don't touch WM1S_LP_EN here.
7199 * Doing so could cause underruns.
7203 static void ironlake_init_clock_gating(struct drm_i915_private *dev_priv)
7205 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
7209 * WaFbcDisableDpfcClockGating:ilk
7211 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
7212 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
7213 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
7215 I915_WRITE(PCH_3DCGDIS0,
7216 MARIUNIT_CLOCK_GATE_DISABLE |
7217 SVSMUNIT_CLOCK_GATE_DISABLE);
7218 I915_WRITE(PCH_3DCGDIS1,
7219 VFMUNIT_CLOCK_GATE_DISABLE);
7222 * According to the spec the following bits should be set in
7223 * order to enable memory self-refresh
7224 * The bit 22/21 of 0x42004
7225 * The bit 5 of 0x42020
7226 * The bit 15 of 0x45000
7228 I915_WRITE(ILK_DISPLAY_CHICKEN2,
7229 (I915_READ(ILK_DISPLAY_CHICKEN2) |
7230 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
7231 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
7232 I915_WRITE(DISP_ARB_CTL,
7233 (I915_READ(DISP_ARB_CTL) |
7236 ilk_init_lp_watermarks(dev_priv);
7239 * Based on the document from hardware guys the following bits
7240 * should be set unconditionally in order to enable FBC.
7241 * The bit 22 of 0x42000
7242 * The bit 22 of 0x42004
7243 * The bit 7,8,9 of 0x42020.
7245 if (IS_IRONLAKE_M(dev_priv)) {
7246 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
7247 I915_WRITE(ILK_DISPLAY_CHICKEN1,
7248 I915_READ(ILK_DISPLAY_CHICKEN1) |
7250 I915_WRITE(ILK_DISPLAY_CHICKEN2,
7251 I915_READ(ILK_DISPLAY_CHICKEN2) |
7255 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
7257 I915_WRITE(ILK_DISPLAY_CHICKEN2,
7258 I915_READ(ILK_DISPLAY_CHICKEN2) |
7259 ILK_ELPIN_409_SELECT);
7260 I915_WRITE(_3D_CHICKEN2,
7261 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
7262 _3D_CHICKEN2_WM_READ_PIPELINED);
7264 /* WaDisableRenderCachePipelinedFlush:ilk */
7265 I915_WRITE(CACHE_MODE_0,
7266 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
7268 /* WaDisable_RenderCache_OperationalFlush:ilk */
7269 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7271 g4x_disable_trickle_feed(dev_priv);
7273 ibx_init_clock_gating(dev_priv);
7276 static void cpt_init_clock_gating(struct drm_i915_private *dev_priv)
7282 * On Ibex Peak and Cougar Point, we need to disable clock
7283 * gating for the panel power sequencer or it will fail to
7284 * start up when no ports are active.
7286 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
7287 PCH_DPLUNIT_CLOCK_GATE_DISABLE |
7288 PCH_CPUNIT_CLOCK_GATE_DISABLE);
7289 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
7290 DPLS_EDP_PPS_FIX_DIS);
7291 /* The below fixes the weird display corruption, a few pixels shifted
7292 * downward, on (only) LVDS of some HP laptops with IVY.
7294 for_each_pipe(dev_priv, pipe) {
7295 val = I915_READ(TRANS_CHICKEN2(pipe));
7296 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
7297 val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
7298 if (dev_priv->vbt.fdi_rx_polarity_inverted)
7299 val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
7300 val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
7301 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
7302 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
7303 I915_WRITE(TRANS_CHICKEN2(pipe), val);
7305 /* WADP0ClockGatingDisable */
7306 for_each_pipe(dev_priv, pipe) {
7307 I915_WRITE(TRANS_CHICKEN1(pipe),
7308 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
7312 static void gen6_check_mch_setup(struct drm_i915_private *dev_priv)
7316 tmp = I915_READ(MCH_SSKPD);
7317 if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL)
7318 DRM_DEBUG_KMS("Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n",
7322 static void gen6_init_clock_gating(struct drm_i915_private *dev_priv)
7324 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
7326 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
7328 I915_WRITE(ILK_DISPLAY_CHICKEN2,
7329 I915_READ(ILK_DISPLAY_CHICKEN2) |
7330 ILK_ELPIN_409_SELECT);
7332 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
7333 I915_WRITE(_3D_CHICKEN,
7334 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
7336 /* WaDisable_RenderCache_OperationalFlush:snb */
7337 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7340 * BSpec recoomends 8x4 when MSAA is used,
7341 * however in practice 16x4 seems fastest.
7343 * Note that PS/WM thread counts depend on the WIZ hashing
7344 * disable bit, which we don't touch here, but it's good
7345 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
7347 I915_WRITE(GEN6_GT_MODE,
7348 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4));
7350 ilk_init_lp_watermarks(dev_priv);
7352 I915_WRITE(CACHE_MODE_0,
7353 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
7355 I915_WRITE(GEN6_UCGCTL1,
7356 I915_READ(GEN6_UCGCTL1) |
7357 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
7358 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
7360 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
7361 * gating disable must be set. Failure to set it results in
7362 * flickering pixels due to Z write ordering failures after
7363 * some amount of runtime in the Mesa "fire" demo, and Unigine
7364 * Sanctuary and Tropics, and apparently anything else with
7365 * alpha test or pixel discard.
7367 * According to the spec, bit 11 (RCCUNIT) must also be set,
7368 * but we didn't debug actual testcases to find it out.
7370 * WaDisableRCCUnitClockGating:snb
7371 * WaDisableRCPBUnitClockGating:snb
7373 I915_WRITE(GEN6_UCGCTL2,
7374 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
7375 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
7377 /* WaStripsFansDisableFastClipPerformanceFix:snb */
7378 I915_WRITE(_3D_CHICKEN3,
7379 _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL));
7383 * "This bit must be set if 3DSTATE_CLIP clip mode is set to normal and
7384 * 3DSTATE_SF number of SF output attributes is more than 16."
7386 I915_WRITE(_3D_CHICKEN3,
7387 _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_PIPELINED_ATTR_FETCH));
7390 * According to the spec the following bits should be
7391 * set in order to enable memory self-refresh and fbc:
7392 * The bit21 and bit22 of 0x42000
7393 * The bit21 and bit22 of 0x42004
7394 * The bit5 and bit7 of 0x42020
7395 * The bit14 of 0x70180
7396 * The bit14 of 0x71180
7398 * WaFbcAsynchFlipDisableFbcQueue:snb
7400 I915_WRITE(ILK_DISPLAY_CHICKEN1,
7401 I915_READ(ILK_DISPLAY_CHICKEN1) |
7402 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
7403 I915_WRITE(ILK_DISPLAY_CHICKEN2,
7404 I915_READ(ILK_DISPLAY_CHICKEN2) |
7405 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
7406 I915_WRITE(ILK_DSPCLK_GATE_D,
7407 I915_READ(ILK_DSPCLK_GATE_D) |
7408 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
7409 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
7411 g4x_disable_trickle_feed(dev_priv);
7413 cpt_init_clock_gating(dev_priv);
7415 gen6_check_mch_setup(dev_priv);
7418 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
7420 uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
7423 * WaVSThreadDispatchOverride:ivb,vlv
7425 * This actually overrides the dispatch
7426 * mode for all thread types.
7428 reg &= ~GEN7_FF_SCHED_MASK;
7429 reg |= GEN7_FF_TS_SCHED_HW;
7430 reg |= GEN7_FF_VS_SCHED_HW;
7431 reg |= GEN7_FF_DS_SCHED_HW;
7433 I915_WRITE(GEN7_FF_THREAD_MODE, reg);
7436 static void lpt_init_clock_gating(struct drm_i915_private *dev_priv)
7439 * TODO: this bit should only be enabled when really needed, then
7440 * disabled when not needed anymore in order to save power.
7442 if (HAS_PCH_LPT_LP(dev_priv))
7443 I915_WRITE(SOUTH_DSPCLK_GATE_D,
7444 I915_READ(SOUTH_DSPCLK_GATE_D) |
7445 PCH_LP_PARTITION_LEVEL_DISABLE);
7447 /* WADPOClockGatingDisable:hsw */
7448 I915_WRITE(TRANS_CHICKEN1(PIPE_A),
7449 I915_READ(TRANS_CHICKEN1(PIPE_A)) |
7450 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
7453 static void lpt_suspend_hw(struct drm_i915_private *dev_priv)
7455 if (HAS_PCH_LPT_LP(dev_priv)) {
7456 uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D);
7458 val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
7459 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
7463 static void gen8_set_l3sqc_credits(struct drm_i915_private *dev_priv,
7464 int general_prio_credits,
7465 int high_prio_credits)
7469 /* WaTempDisableDOPClkGating:bdw */
7470 misccpctl = I915_READ(GEN7_MISCCPCTL);
7471 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
7473 I915_WRITE(GEN8_L3SQCREG1,
7474 L3_GENERAL_PRIO_CREDITS(general_prio_credits) |
7475 L3_HIGH_PRIO_CREDITS(high_prio_credits));
7478 * Wait at least 100 clocks before re-enabling clock gating.
7479 * See the definition of L3SQCREG1 in BSpec.
7481 POSTING_READ(GEN8_L3SQCREG1);
7483 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
7486 static void kabylake_init_clock_gating(struct drm_i915_private *dev_priv)
7488 gen9_init_clock_gating(dev_priv);
7490 /* WaDisableSDEUnitClockGating:kbl */
7491 if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0))
7492 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
7493 GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
7495 /* WaDisableGamClockGating:kbl */
7496 if (IS_KBL_REVID(dev_priv, 0, KBL_REVID_B0))
7497 I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) |
7498 GEN6_GAMUNIT_CLOCK_GATE_DISABLE);
7500 /* WaFbcNukeOnHostModify:kbl */
7501 I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) |
7502 ILK_DPFC_NUKE_ON_ANY_MODIFICATION);
7505 static void skylake_init_clock_gating(struct drm_i915_private *dev_priv)
7507 gen9_init_clock_gating(dev_priv);
7509 /* WAC6entrylatency:skl */
7510 I915_WRITE(FBC_LLC_READ_CTRL, I915_READ(FBC_LLC_READ_CTRL) |
7511 FBC_LLC_FULLY_OPEN);
7513 /* WaFbcNukeOnHostModify:skl */
7514 I915_WRITE(ILK_DPFC_CHICKEN, I915_READ(ILK_DPFC_CHICKEN) |
7515 ILK_DPFC_NUKE_ON_ANY_MODIFICATION);
7518 static void broadwell_init_clock_gating(struct drm_i915_private *dev_priv)
7522 ilk_init_lp_watermarks(dev_priv);
7524 /* WaSwitchSolVfFArbitrationPriority:bdw */
7525 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
7527 /* WaPsrDPAMaskVBlankInSRD:bdw */
7528 I915_WRITE(CHICKEN_PAR1_1,
7529 I915_READ(CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD);
7531 /* WaPsrDPRSUnmaskVBlankInSRD:bdw */
7532 for_each_pipe(dev_priv, pipe) {
7533 I915_WRITE(CHICKEN_PIPESL_1(pipe),
7534 I915_READ(CHICKEN_PIPESL_1(pipe)) |
7535 BDW_DPRS_MASK_VBLANK_SRD);
7538 /* WaVSRefCountFullforceMissDisable:bdw */
7539 /* WaDSRefCountFullforceMissDisable:bdw */
7540 I915_WRITE(GEN7_FF_THREAD_MODE,
7541 I915_READ(GEN7_FF_THREAD_MODE) &
7542 ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME));
7544 I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL,
7545 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE));
7547 /* WaDisableSDEUnitClockGating:bdw */
7548 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
7549 GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
7551 /* WaProgramL3SqcReg1Default:bdw */
7552 gen8_set_l3sqc_credits(dev_priv, 30, 2);
7555 * WaGttCachingOffByDefault:bdw
7556 * GTT cache may not work with big pages, so if those
7557 * are ever enabled GTT cache may need to be disabled.
7559 I915_WRITE(HSW_GTT_CACHE_EN, GTT_CACHE_EN_ALL);
7561 /* WaKVMNotificationOnConfigChange:bdw */
7562 I915_WRITE(CHICKEN_PAR2_1, I915_READ(CHICKEN_PAR2_1)
7563 | KVM_CONFIG_CHANGE_NOTIFICATION_SELECT);
7565 lpt_init_clock_gating(dev_priv);
7567 /* WaDisableDopClockGating:bdw
7569 * Also see the CHICKEN2 write in bdw_init_workarounds() to disable DOP
7572 I915_WRITE(GEN6_UCGCTL1,
7573 I915_READ(GEN6_UCGCTL1) | GEN6_EU_TCUNIT_CLOCK_GATE_DISABLE);
7576 static void haswell_init_clock_gating(struct drm_i915_private *dev_priv)
7578 ilk_init_lp_watermarks(dev_priv);
7580 /* L3 caching of data atomics doesn't work -- disable it. */
7581 I915_WRITE(HSW_SCRATCH1, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE);
7582 I915_WRITE(HSW_ROW_CHICKEN3,
7583 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE));
7585 /* This is required by WaCatErrorRejectionIssue:hsw */
7586 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
7587 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
7588 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
7590 /* WaVSRefCountFullforceMissDisable:hsw */
7591 I915_WRITE(GEN7_FF_THREAD_MODE,
7592 I915_READ(GEN7_FF_THREAD_MODE) & ~GEN7_FF_VS_REF_CNT_FFME);
7594 /* WaDisable_RenderCache_OperationalFlush:hsw */
7595 I915_WRITE(CACHE_MODE_0_GEN7, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7597 /* enable HiZ Raw Stall Optimization */
7598 I915_WRITE(CACHE_MODE_0_GEN7,
7599 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE));
7601 /* WaDisable4x2SubspanOptimization:hsw */
7602 I915_WRITE(CACHE_MODE_1,
7603 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
7606 * BSpec recommends 8x4 when MSAA is used,
7607 * however in practice 16x4 seems fastest.
7609 * Note that PS/WM thread counts depend on the WIZ hashing
7610 * disable bit, which we don't touch here, but it's good
7611 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
7613 I915_WRITE(GEN7_GT_MODE,
7614 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4));
7616 /* WaSampleCChickenBitEnable:hsw */
7617 I915_WRITE(HALF_SLICE_CHICKEN3,
7618 _MASKED_BIT_ENABLE(HSW_SAMPLE_C_PERFORMANCE));
7620 /* WaSwitchSolVfFArbitrationPriority:hsw */
7621 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
7623 /* WaRsPkgCStateDisplayPMReq:hsw */
7624 I915_WRITE(CHICKEN_PAR1_1,
7625 I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
7627 lpt_init_clock_gating(dev_priv);
7630 static void ivybridge_init_clock_gating(struct drm_i915_private *dev_priv)
7634 ilk_init_lp_watermarks(dev_priv);
7636 I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
7638 /* WaDisableEarlyCull:ivb */
7639 I915_WRITE(_3D_CHICKEN3,
7640 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
7642 /* WaDisableBackToBackFlipFix:ivb */
7643 I915_WRITE(IVB_CHICKEN3,
7644 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
7645 CHICKEN3_DGMG_DONE_FIX_DISABLE);
7647 /* WaDisablePSDDualDispatchEnable:ivb */
7648 if (IS_IVB_GT1(dev_priv))
7649 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
7650 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
7652 /* WaDisable_RenderCache_OperationalFlush:ivb */
7653 I915_WRITE(CACHE_MODE_0_GEN7, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7655 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
7656 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
7657 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
7659 /* WaApplyL3ControlAndL3ChickenMode:ivb */
7660 I915_WRITE(GEN7_L3CNTLREG1,
7661 GEN7_WA_FOR_GEN7_L3_CONTROL);
7662 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
7663 GEN7_WA_L3_CHICKEN_MODE);
7664 if (IS_IVB_GT1(dev_priv))
7665 I915_WRITE(GEN7_ROW_CHICKEN2,
7666 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
7668 /* must write both registers */
7669 I915_WRITE(GEN7_ROW_CHICKEN2,
7670 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
7671 I915_WRITE(GEN7_ROW_CHICKEN2_GT2,
7672 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
7675 /* WaForceL3Serialization:ivb */
7676 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
7677 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
7680 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
7681 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
7683 I915_WRITE(GEN6_UCGCTL2,
7684 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
7686 /* This is required by WaCatErrorRejectionIssue:ivb */
7687 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
7688 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
7689 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
7691 g4x_disable_trickle_feed(dev_priv);
7693 gen7_setup_fixed_func_scheduler(dev_priv);
7695 if (0) { /* causes HiZ corruption on ivb:gt1 */
7696 /* enable HiZ Raw Stall Optimization */
7697 I915_WRITE(CACHE_MODE_0_GEN7,
7698 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE));
7701 /* WaDisable4x2SubspanOptimization:ivb */
7702 I915_WRITE(CACHE_MODE_1,
7703 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
7706 * BSpec recommends 8x4 when MSAA is used,
7707 * however in practice 16x4 seems fastest.
7709 * Note that PS/WM thread counts depend on the WIZ hashing
7710 * disable bit, which we don't touch here, but it's good
7711 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
7713 I915_WRITE(GEN7_GT_MODE,
7714 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4));
7716 snpcr = I915_READ(GEN6_MBCUNIT_SNPCR);
7717 snpcr &= ~GEN6_MBC_SNPCR_MASK;
7718 snpcr |= GEN6_MBC_SNPCR_MED;
7719 I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
7721 if (!HAS_PCH_NOP(dev_priv))
7722 cpt_init_clock_gating(dev_priv);
7724 gen6_check_mch_setup(dev_priv);
7727 static void valleyview_init_clock_gating(struct drm_i915_private *dev_priv)
7729 /* WaDisableEarlyCull:vlv */
7730 I915_WRITE(_3D_CHICKEN3,
7731 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
7733 /* WaDisableBackToBackFlipFix:vlv */
7734 I915_WRITE(IVB_CHICKEN3,
7735 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
7736 CHICKEN3_DGMG_DONE_FIX_DISABLE);
7738 /* WaPsdDispatchEnable:vlv */
7739 /* WaDisablePSDDualDispatchEnable:vlv */
7740 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
7741 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP |
7742 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
7744 /* WaDisable_RenderCache_OperationalFlush:vlv */
7745 I915_WRITE(CACHE_MODE_0_GEN7, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7747 /* WaForceL3Serialization:vlv */
7748 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
7749 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
7751 /* WaDisableDopClockGating:vlv */
7752 I915_WRITE(GEN7_ROW_CHICKEN2,
7753 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
7755 /* This is required by WaCatErrorRejectionIssue:vlv */
7756 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
7757 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
7758 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
7760 gen7_setup_fixed_func_scheduler(dev_priv);
7763 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
7764 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
7766 I915_WRITE(GEN6_UCGCTL2,
7767 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
7769 /* WaDisableL3Bank2xClockGate:vlv
7770 * Disabling L3 clock gating- MMIO 940c[25] = 1
7771 * Set bit 25, to disable L3_BANK_2x_CLK_GATING */
7772 I915_WRITE(GEN7_UCGCTL4,
7773 I915_READ(GEN7_UCGCTL4) | GEN7_L3BANK2X_CLOCK_GATE_DISABLE);
7776 * BSpec says this must be set, even though
7777 * WaDisable4x2SubspanOptimization isn't listed for VLV.
7779 I915_WRITE(CACHE_MODE_1,
7780 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
7783 * BSpec recommends 8x4 when MSAA is used,
7784 * however in practice 16x4 seems fastest.
7786 * Note that PS/WM thread counts depend on the WIZ hashing
7787 * disable bit, which we don't touch here, but it's good
7788 * to keep in mind (see 3DSTATE_PS and 3DSTATE_WM).
7790 I915_WRITE(GEN7_GT_MODE,
7791 _MASKED_FIELD(GEN6_WIZ_HASHING_MASK, GEN6_WIZ_HASHING_16x4));
7794 * WaIncreaseL3CreditsForVLVB0:vlv
7795 * This is the hardware default actually.
7797 I915_WRITE(GEN7_L3SQCREG1, VLV_B0_WA_L3SQCREG1_VALUE);
7800 * WaDisableVLVClockGating_VBIIssue:vlv
7801 * Disable clock gating on th GCFG unit to prevent a delay
7802 * in the reporting of vblank events.
7804 I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS);
7807 static void cherryview_init_clock_gating(struct drm_i915_private *dev_priv)
7809 /* WaVSRefCountFullforceMissDisable:chv */
7810 /* WaDSRefCountFullforceMissDisable:chv */
7811 I915_WRITE(GEN7_FF_THREAD_MODE,
7812 I915_READ(GEN7_FF_THREAD_MODE) &
7813 ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME));
7815 /* WaDisableSemaphoreAndSyncFlipWait:chv */
7816 I915_WRITE(GEN6_RC_SLEEP_PSMI_CONTROL,
7817 _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE));
7819 /* WaDisableCSUnitClockGating:chv */
7820 I915_WRITE(GEN6_UCGCTL1, I915_READ(GEN6_UCGCTL1) |
7821 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
7823 /* WaDisableSDEUnitClockGating:chv */
7824 I915_WRITE(GEN8_UCGCTL6, I915_READ(GEN8_UCGCTL6) |
7825 GEN8_SDEUNIT_CLOCK_GATE_DISABLE);
7828 * WaProgramL3SqcReg1Default:chv
7829 * See gfxspecs/Related Documents/Performance Guide/
7830 * LSQC Setting Recommendations.
7832 gen8_set_l3sqc_credits(dev_priv, 38, 2);
7835 * GTT cache may not work with big pages, so if those
7836 * are ever enabled GTT cache may need to be disabled.
7838 I915_WRITE(HSW_GTT_CACHE_EN, GTT_CACHE_EN_ALL);
7841 static void g4x_init_clock_gating(struct drm_i915_private *dev_priv)
7843 uint32_t dspclk_gate;
7845 I915_WRITE(RENCLK_GATE_D1, 0);
7846 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
7847 GS_UNIT_CLOCK_GATE_DISABLE |
7848 CL_UNIT_CLOCK_GATE_DISABLE);
7849 I915_WRITE(RAMCLK_GATE_D, 0);
7850 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
7851 OVRUNIT_CLOCK_GATE_DISABLE |
7852 OVCUNIT_CLOCK_GATE_DISABLE;
7853 if (IS_GM45(dev_priv))
7854 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
7855 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
7857 /* WaDisableRenderCachePipelinedFlush */
7858 I915_WRITE(CACHE_MODE_0,
7859 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
7861 /* WaDisable_RenderCache_OperationalFlush:g4x */
7862 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7864 g4x_disable_trickle_feed(dev_priv);
7867 static void crestline_init_clock_gating(struct drm_i915_private *dev_priv)
7869 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
7870 I915_WRITE(RENCLK_GATE_D2, 0);
7871 I915_WRITE(DSPCLK_GATE_D, 0);
7872 I915_WRITE(RAMCLK_GATE_D, 0);
7873 I915_WRITE16(DEUC, 0);
7874 I915_WRITE(MI_ARB_STATE,
7875 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
7877 /* WaDisable_RenderCache_OperationalFlush:gen4 */
7878 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7881 static void broadwater_init_clock_gating(struct drm_i915_private *dev_priv)
7883 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
7884 I965_RCC_CLOCK_GATE_DISABLE |
7885 I965_RCPB_CLOCK_GATE_DISABLE |
7886 I965_ISC_CLOCK_GATE_DISABLE |
7887 I965_FBC_CLOCK_GATE_DISABLE);
7888 I915_WRITE(RENCLK_GATE_D2, 0);
7889 I915_WRITE(MI_ARB_STATE,
7890 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
7892 /* WaDisable_RenderCache_OperationalFlush:gen4 */
7893 I915_WRITE(CACHE_MODE_0, _MASKED_BIT_DISABLE(RC_OP_FLUSH_ENABLE));
7896 static void gen3_init_clock_gating(struct drm_i915_private *dev_priv)
7898 u32 dstate = I915_READ(D_STATE);
7900 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
7901 DSTATE_DOT_CLOCK_GATING;
7902 I915_WRITE(D_STATE, dstate);
7904 if (IS_PINEVIEW(dev_priv))
7905 I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
7907 /* IIR "flip pending" means done if this bit is set */
7908 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
7910 /* interrupts should cause a wake up from C3 */
7911 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_INT_EN));
7913 /* On GEN3 we really need to make sure the ARB C3 LP bit is set */
7914 I915_WRITE(MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE));
7916 I915_WRITE(MI_ARB_STATE,
7917 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
7920 static void i85x_init_clock_gating(struct drm_i915_private *dev_priv)
7922 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
7924 /* interrupts should cause a wake up from C3 */
7925 I915_WRITE(MI_STATE, _MASKED_BIT_ENABLE(MI_AGPBUSY_INT_EN) |
7926 _MASKED_BIT_DISABLE(MI_AGPBUSY_830_MODE));
7928 I915_WRITE(MEM_MODE,
7929 _MASKED_BIT_ENABLE(MEM_DISPLAY_TRICKLE_FEED_DISABLE));
7932 static void i830_init_clock_gating(struct drm_i915_private *dev_priv)
7934 I915_WRITE(MEM_MODE,
7935 _MASKED_BIT_ENABLE(MEM_DISPLAY_A_TRICKLE_FEED_DISABLE) |
7936 _MASKED_BIT_ENABLE(MEM_DISPLAY_B_TRICKLE_FEED_DISABLE));
7939 void intel_init_clock_gating(struct drm_i915_private *dev_priv)
7941 dev_priv->display.init_clock_gating(dev_priv);
7944 void intel_suspend_hw(struct drm_i915_private *dev_priv)
7946 if (HAS_PCH_LPT(dev_priv))
7947 lpt_suspend_hw(dev_priv);
7950 static void nop_init_clock_gating(struct drm_i915_private *dev_priv)
7952 DRM_DEBUG_KMS("No clock gating settings or workarounds applied.\n");
7956 * intel_init_clock_gating_hooks - setup the clock gating hooks
7957 * @dev_priv: device private
7959 * Setup the hooks that configure which clocks of a given platform can be
7960 * gated and also apply various GT and display specific workarounds for these
7961 * platforms. Note that some GT specific workarounds are applied separately
7962 * when GPU contexts or batchbuffers start their execution.
7964 void intel_init_clock_gating_hooks(struct drm_i915_private *dev_priv)
7966 if (IS_SKYLAKE(dev_priv))
7967 dev_priv->display.init_clock_gating = skylake_init_clock_gating;
7968 else if (IS_KABYLAKE(dev_priv))
7969 dev_priv->display.init_clock_gating = kabylake_init_clock_gating;
7970 else if (IS_BROXTON(dev_priv))
7971 dev_priv->display.init_clock_gating = bxt_init_clock_gating;
7972 else if (IS_GEMINILAKE(dev_priv))
7973 dev_priv->display.init_clock_gating = glk_init_clock_gating;
7974 else if (IS_BROADWELL(dev_priv))
7975 dev_priv->display.init_clock_gating = broadwell_init_clock_gating;
7976 else if (IS_CHERRYVIEW(dev_priv))
7977 dev_priv->display.init_clock_gating = cherryview_init_clock_gating;
7978 else if (IS_HASWELL(dev_priv))
7979 dev_priv->display.init_clock_gating = haswell_init_clock_gating;
7980 else if (IS_IVYBRIDGE(dev_priv))
7981 dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
7982 else if (IS_VALLEYVIEW(dev_priv))
7983 dev_priv->display.init_clock_gating = valleyview_init_clock_gating;
7984 else if (IS_GEN6(dev_priv))
7985 dev_priv->display.init_clock_gating = gen6_init_clock_gating;
7986 else if (IS_GEN5(dev_priv))
7987 dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
7988 else if (IS_G4X(dev_priv))
7989 dev_priv->display.init_clock_gating = g4x_init_clock_gating;
7990 else if (IS_I965GM(dev_priv))
7991 dev_priv->display.init_clock_gating = crestline_init_clock_gating;
7992 else if (IS_I965G(dev_priv))
7993 dev_priv->display.init_clock_gating = broadwater_init_clock_gating;
7994 else if (IS_GEN3(dev_priv))
7995 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
7996 else if (IS_I85X(dev_priv) || IS_I865G(dev_priv))
7997 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
7998 else if (IS_GEN2(dev_priv))
7999 dev_priv->display.init_clock_gating = i830_init_clock_gating;
8001 MISSING_CASE(INTEL_DEVID(dev_priv));
8002 dev_priv->display.init_clock_gating = nop_init_clock_gating;
8006 /* Set up chip specific power management-related functions */
8007 void intel_init_pm(struct drm_i915_private *dev_priv)
8009 intel_fbc_init(dev_priv);
8012 if (IS_PINEVIEW(dev_priv))
8013 i915_pineview_get_mem_freq(dev_priv);
8014 else if (IS_GEN5(dev_priv))
8015 i915_ironlake_get_mem_freq(dev_priv);
8017 /* For FIFO watermark updates */
8018 if (INTEL_GEN(dev_priv) >= 9) {
8019 skl_setup_wm_latency(dev_priv);
8020 dev_priv->display.initial_watermarks = skl_initial_wm;
8021 dev_priv->display.atomic_update_watermarks = skl_atomic_update_crtc_wm;
8022 dev_priv->display.compute_global_watermarks = skl_compute_wm;
8023 } else if (HAS_PCH_SPLIT(dev_priv)) {
8024 ilk_setup_wm_latency(dev_priv);
8026 if ((IS_GEN5(dev_priv) && dev_priv->wm.pri_latency[1] &&
8027 dev_priv->wm.spr_latency[1] && dev_priv->wm.cur_latency[1]) ||
8028 (!IS_GEN5(dev_priv) && dev_priv->wm.pri_latency[0] &&
8029 dev_priv->wm.spr_latency[0] && dev_priv->wm.cur_latency[0])) {
8030 dev_priv->display.compute_pipe_wm = ilk_compute_pipe_wm;
8031 dev_priv->display.compute_intermediate_wm =
8032 ilk_compute_intermediate_wm;
8033 dev_priv->display.initial_watermarks =
8034 ilk_initial_watermarks;
8035 dev_priv->display.optimize_watermarks =
8036 ilk_optimize_watermarks;
8038 DRM_DEBUG_KMS("Failed to read display plane latency. "
8041 } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
8042 vlv_setup_wm_latency(dev_priv);
8043 dev_priv->display.compute_pipe_wm = vlv_compute_pipe_wm;
8044 dev_priv->display.compute_intermediate_wm = vlv_compute_intermediate_wm;
8045 dev_priv->display.initial_watermarks = vlv_initial_watermarks;
8046 dev_priv->display.optimize_watermarks = vlv_optimize_watermarks;
8047 dev_priv->display.atomic_update_watermarks = vlv_atomic_update_fifo;
8048 } else if (IS_PINEVIEW(dev_priv)) {
8049 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev_priv),
8052 dev_priv->mem_freq)) {
8053 DRM_INFO("failed to find known CxSR latency "
8054 "(found ddr%s fsb freq %d, mem freq %d), "
8056 (dev_priv->is_ddr3 == 1) ? "3" : "2",
8057 dev_priv->fsb_freq, dev_priv->mem_freq);
8058 /* Disable CxSR and never update its watermark again */
8059 intel_set_memory_cxsr(dev_priv, false);
8060 dev_priv->display.update_wm = NULL;
8062 dev_priv->display.update_wm = pineview_update_wm;
8063 } else if (IS_G4X(dev_priv)) {
8064 dev_priv->display.update_wm = g4x_update_wm;
8065 } else if (IS_GEN4(dev_priv)) {
8066 dev_priv->display.update_wm = i965_update_wm;
8067 } else if (IS_GEN3(dev_priv)) {
8068 dev_priv->display.update_wm = i9xx_update_wm;
8069 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
8070 } else if (IS_GEN2(dev_priv)) {
8071 if (INTEL_INFO(dev_priv)->num_pipes == 1) {
8072 dev_priv->display.update_wm = i845_update_wm;
8073 dev_priv->display.get_fifo_size = i845_get_fifo_size;
8075 dev_priv->display.update_wm = i9xx_update_wm;
8076 dev_priv->display.get_fifo_size = i830_get_fifo_size;
8079 DRM_ERROR("unexpected fall-through in intel_init_pm\n");
8083 static inline int gen6_check_mailbox_status(struct drm_i915_private *dev_priv)
8086 I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_ERROR_MASK;
8089 case GEN6_PCODE_SUCCESS:
8091 case GEN6_PCODE_UNIMPLEMENTED_CMD:
8092 case GEN6_PCODE_ILLEGAL_CMD:
8094 case GEN6_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
8095 case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
8097 case GEN6_PCODE_TIMEOUT:
8100 MISSING_CASE(flags);
8105 static inline int gen7_check_mailbox_status(struct drm_i915_private *dev_priv)
8108 I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_ERROR_MASK;
8111 case GEN6_PCODE_SUCCESS:
8113 case GEN6_PCODE_ILLEGAL_CMD:
8115 case GEN7_PCODE_TIMEOUT:
8117 case GEN7_PCODE_ILLEGAL_DATA:
8119 case GEN7_PCODE_MIN_FREQ_TABLE_GT_RATIO_OUT_OF_RANGE:
8122 MISSING_CASE(flags);
8127 int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u32 mbox, u32 *val)
8131 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
8133 /* GEN6_PCODE_* are outside of the forcewake domain, we can
8134 * use te fw I915_READ variants to reduce the amount of work
8135 * required when reading/writing.
8138 if (I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
8139 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
8143 I915_WRITE_FW(GEN6_PCODE_DATA, *val);
8144 I915_WRITE_FW(GEN6_PCODE_DATA1, 0);
8145 I915_WRITE_FW(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
8147 if (intel_wait_for_register_fw(dev_priv,
8148 GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0,
8150 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox);
8154 *val = I915_READ_FW(GEN6_PCODE_DATA);
8155 I915_WRITE_FW(GEN6_PCODE_DATA, 0);
8157 if (INTEL_GEN(dev_priv) > 6)
8158 status = gen7_check_mailbox_status(dev_priv);
8160 status = gen6_check_mailbox_status(dev_priv);
8163 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed: %d\n",
8171 int sandybridge_pcode_write(struct drm_i915_private *dev_priv,
8176 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
8178 /* GEN6_PCODE_* are outside of the forcewake domain, we can
8179 * use te fw I915_READ variants to reduce the amount of work
8180 * required when reading/writing.
8183 if (I915_READ_FW(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
8184 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
8188 I915_WRITE_FW(GEN6_PCODE_DATA, val);
8189 I915_WRITE_FW(GEN6_PCODE_DATA1, 0);
8190 I915_WRITE_FW(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
8192 if (intel_wait_for_register_fw(dev_priv,
8193 GEN6_PCODE_MAILBOX, GEN6_PCODE_READY, 0,
8195 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox);
8199 I915_WRITE_FW(GEN6_PCODE_DATA, 0);
8201 if (INTEL_GEN(dev_priv) > 6)
8202 status = gen7_check_mailbox_status(dev_priv);
8204 status = gen6_check_mailbox_status(dev_priv);
8207 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed: %d\n",
8215 static bool skl_pcode_try_request(struct drm_i915_private *dev_priv, u32 mbox,
8216 u32 request, u32 reply_mask, u32 reply,
8221 *status = sandybridge_pcode_read(dev_priv, mbox, &val);
8223 return *status || ((val & reply_mask) == reply);
8227 * skl_pcode_request - send PCODE request until acknowledgment
8228 * @dev_priv: device private
8229 * @mbox: PCODE mailbox ID the request is targeted for
8230 * @request: request ID
8231 * @reply_mask: mask used to check for request acknowledgment
8232 * @reply: value used to check for request acknowledgment
8233 * @timeout_base_ms: timeout for polling with preemption enabled
8235 * Keep resending the @request to @mbox until PCODE acknowledges it, PCODE
8236 * reports an error or an overall timeout of @timeout_base_ms+50 ms expires.
8237 * The request is acknowledged once the PCODE reply dword equals @reply after
8238 * applying @reply_mask. Polling is first attempted with preemption enabled
8239 * for @timeout_base_ms and if this times out for another 50 ms with
8240 * preemption disabled.
8242 * Returns 0 on success, %-ETIMEDOUT in case of a timeout, <0 in case of some
8243 * other error as reported by PCODE.
8245 int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
8246 u32 reply_mask, u32 reply, int timeout_base_ms)
8251 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
8253 #define COND skl_pcode_try_request(dev_priv, mbox, request, reply_mask, reply, \
8257 * Prime the PCODE by doing a request first. Normally it guarantees
8258 * that a subsequent request, at most @timeout_base_ms later, succeeds.
8259 * _wait_for() doesn't guarantee when its passed condition is evaluated
8260 * first, so send the first request explicitly.
8266 ret = _wait_for(COND, timeout_base_ms * 1000, 10);
8271 * The above can time out if the number of requests was low (2 in the
8272 * worst case) _and_ PCODE was busy for some reason even after a
8273 * (queued) request and @timeout_base_ms delay. As a workaround retry
8274 * the poll with preemption disabled to maximize the number of
8275 * requests. Increase the timeout from @timeout_base_ms to 50ms to
8276 * account for interrupts that could reduce the number of these
8277 * requests, and for any quirks of the PCODE firmware that delays
8278 * the request completion.
8280 DRM_DEBUG_KMS("PCODE timeout, retrying with preemption disabled\n");
8281 WARN_ON_ONCE(timeout_base_ms > 3);
8283 ret = wait_for_atomic(COND, 50);
8287 return ret ? ret : status;
8291 static int byt_gpu_freq(struct drm_i915_private *dev_priv, int val)
8295 * Slow = Fast = GPLL ref * N
8297 return DIV_ROUND_CLOSEST(dev_priv->rps.gpll_ref_freq * (val - 0xb7), 1000);
8300 static int byt_freq_opcode(struct drm_i915_private *dev_priv, int val)
8302 return DIV_ROUND_CLOSEST(1000 * val, dev_priv->rps.gpll_ref_freq) + 0xb7;
8305 static int chv_gpu_freq(struct drm_i915_private *dev_priv, int val)
8309 * CU (slow) = CU2x (fast) / 2 = GPLL ref * N / 2
8311 return DIV_ROUND_CLOSEST(dev_priv->rps.gpll_ref_freq * val, 2 * 2 * 1000);
8314 static int chv_freq_opcode(struct drm_i915_private *dev_priv, int val)
8316 /* CHV needs even values */
8317 return DIV_ROUND_CLOSEST(2 * 1000 * val, dev_priv->rps.gpll_ref_freq) * 2;
8320 int intel_gpu_freq(struct drm_i915_private *dev_priv, int val)
8322 if (IS_GEN9(dev_priv))
8323 return DIV_ROUND_CLOSEST(val * GT_FREQUENCY_MULTIPLIER,
8325 else if (IS_CHERRYVIEW(dev_priv))
8326 return chv_gpu_freq(dev_priv, val);
8327 else if (IS_VALLEYVIEW(dev_priv))
8328 return byt_gpu_freq(dev_priv, val);
8330 return val * GT_FREQUENCY_MULTIPLIER;
8333 int intel_freq_opcode(struct drm_i915_private *dev_priv, int val)
8335 if (IS_GEN9(dev_priv))
8336 return DIV_ROUND_CLOSEST(val * GEN9_FREQ_SCALER,
8337 GT_FREQUENCY_MULTIPLIER);
8338 else if (IS_CHERRYVIEW(dev_priv))
8339 return chv_freq_opcode(dev_priv, val);
8340 else if (IS_VALLEYVIEW(dev_priv))
8341 return byt_freq_opcode(dev_priv, val);
8343 return DIV_ROUND_CLOSEST(val, GT_FREQUENCY_MULTIPLIER);
8346 struct request_boost {
8347 struct work_struct work;
8348 struct drm_i915_gem_request *req;
8351 static void __intel_rps_boost_work(struct work_struct *work)
8353 struct request_boost *boost = container_of(work, struct request_boost, work);
8354 struct drm_i915_gem_request *req = boost->req;
8356 if (!i915_gem_request_completed(req))
8357 gen6_rps_boost(req->i915, NULL, req->emitted_jiffies);
8359 i915_gem_request_put(req);
8363 void intel_queue_rps_boost_for_request(struct drm_i915_gem_request *req)
8365 struct request_boost *boost;
8367 if (req == NULL || INTEL_GEN(req->i915) < 6)
8370 if (i915_gem_request_completed(req))
8373 boost = kmalloc(sizeof(*boost), GFP_ATOMIC);
8377 boost->req = i915_gem_request_get(req);
8379 INIT_WORK(&boost->work, __intel_rps_boost_work);
8380 queue_work(req->i915->wq, &boost->work);
8383 void intel_pm_setup(struct drm_i915_private *dev_priv)
8385 mutex_init(&dev_priv->rps.hw_lock);
8386 spin_lock_init(&dev_priv->rps.client_lock);
8388 INIT_DELAYED_WORK(&dev_priv->rps.autoenable_work,
8389 __intel_autoenable_gt_powersave);
8390 INIT_LIST_HEAD(&dev_priv->rps.clients);
8392 dev_priv->pm.suspended = false;
8393 atomic_set(&dev_priv->pm.wakeref_count, 0);
8396 static u64 vlv_residency_raw(struct drm_i915_private *dev_priv,
8397 const i915_reg_t reg)
8399 u32 lower, upper, tmp;
8402 /* The register accessed do not need forcewake. We borrow
8403 * uncore lock to prevent concurrent access to range reg.
8405 spin_lock_irq(&dev_priv->uncore.lock);
8407 /* vlv and chv residency counters are 40 bits in width.
8408 * With a control bit, we can choose between upper or lower
8409 * 32bit window into this counter.
8411 * Although we always use the counter in high-range mode elsewhere,
8412 * userspace may attempt to read the value before rc6 is initialised,
8413 * before we have set the default VLV_COUNTER_CONTROL value. So always
8414 * set the high bit to be safe.
8416 I915_WRITE_FW(VLV_COUNTER_CONTROL,
8417 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH));
8418 upper = I915_READ_FW(reg);
8422 I915_WRITE_FW(VLV_COUNTER_CONTROL,
8423 _MASKED_BIT_DISABLE(VLV_COUNT_RANGE_HIGH));
8424 lower = I915_READ_FW(reg);
8426 I915_WRITE_FW(VLV_COUNTER_CONTROL,
8427 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH));
8428 upper = I915_READ_FW(reg);
8429 } while (upper != tmp && --loop);
8431 /* Everywhere else we always use VLV_COUNTER_CONTROL with the
8432 * VLV_COUNT_RANGE_HIGH bit set - so it is safe to leave it set
8436 spin_unlock_irq(&dev_priv->uncore.lock);
8438 return lower | (u64)upper << 8;
8441 u64 intel_rc6_residency_us(struct drm_i915_private *dev_priv,
8442 const i915_reg_t reg)
8444 u64 time_hw, units, div;
8446 if (!intel_enable_rc6())
8449 intel_runtime_pm_get(dev_priv);
8451 /* On VLV and CHV, residency time is in CZ units rather than 1.28us */
8452 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
8454 div = dev_priv->czclk_freq;
8456 time_hw = vlv_residency_raw(dev_priv, reg);
8457 } else if (IS_GEN9_LP(dev_priv)) {
8459 div = 1200; /* 833.33ns */
8461 time_hw = I915_READ(reg);
8463 units = 128000; /* 1.28us */
8466 time_hw = I915_READ(reg);
8469 intel_runtime_pm_put(dev_priv);
8470 return DIV_ROUND_UP_ULL(time_hw * units, div);