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>
30 #include "intel_drv.h"
31 #include "../../../platform/x86/intel_ips.h"
32 #include <linux/module.h>
33 #include <linux/vgaarb.h>
34 #include <drm/i915_powerwell.h>
35 #include <linux/pm_runtime.h>
38 * RC6 is a special power stage which allows the GPU to enter an very
39 * low-voltage mode when idle, using down to 0V while at this stage. This
40 * stage is entered automatically when the GPU is idle when RC6 support is
41 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
43 * There are different RC6 modes available in Intel GPU, which differentiate
44 * among each other with the latency required to enter and leave RC6 and
45 * voltage consumed by the GPU in different states.
47 * The combination of the following flags define which states GPU is allowed
48 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
49 * RC6pp is deepest RC6. Their support by hardware varies according to the
50 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
51 * which brings the most power savings; deeper states save more power, but
52 * require higher latency to switch to and wake up.
54 #define INTEL_RC6_ENABLE (1<<0)
55 #define INTEL_RC6p_ENABLE (1<<1)
56 #define INTEL_RC6pp_ENABLE (1<<2)
58 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
59 * framebuffer contents in-memory, aiming at reducing the required bandwidth
60 * during in-memory transfers and, therefore, reduce the power packet.
62 * The benefits of FBC are mostly visible with solid backgrounds and
63 * variation-less patterns.
65 * FBC-related functionality can be enabled by the means of the
66 * i915.i915_enable_fbc parameter
69 static void i8xx_disable_fbc(struct drm_device *dev)
71 struct drm_i915_private *dev_priv = dev->dev_private;
74 /* Disable compression */
75 fbc_ctl = I915_READ(FBC_CONTROL);
76 if ((fbc_ctl & FBC_CTL_EN) == 0)
79 fbc_ctl &= ~FBC_CTL_EN;
80 I915_WRITE(FBC_CONTROL, fbc_ctl);
82 /* Wait for compressing bit to clear */
83 if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
84 DRM_DEBUG_KMS("FBC idle timed out\n");
88 DRM_DEBUG_KMS("disabled FBC\n");
91 static void i8xx_enable_fbc(struct drm_crtc *crtc)
93 struct drm_device *dev = crtc->dev;
94 struct drm_i915_private *dev_priv = dev->dev_private;
95 struct drm_framebuffer *fb = crtc->fb;
96 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
97 struct drm_i915_gem_object *obj = intel_fb->obj;
98 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
103 cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE;
104 if (fb->pitches[0] < cfb_pitch)
105 cfb_pitch = fb->pitches[0];
107 /* FBC_CTL wants 32B or 64B units */
109 cfb_pitch = (cfb_pitch / 32) - 1;
111 cfb_pitch = (cfb_pitch / 64) - 1;
114 for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
115 I915_WRITE(FBC_TAG + (i * 4), 0);
121 fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
122 fbc_ctl2 |= FBC_CTL_PLANE(intel_crtc->plane);
123 I915_WRITE(FBC_CONTROL2, fbc_ctl2);
124 I915_WRITE(FBC_FENCE_OFF, crtc->y);
128 fbc_ctl = I915_READ(FBC_CONTROL);
129 fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT;
130 fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC;
132 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
133 fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
134 fbc_ctl |= obj->fence_reg;
135 I915_WRITE(FBC_CONTROL, fbc_ctl);
137 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c\n",
138 cfb_pitch, crtc->y, plane_name(intel_crtc->plane));
141 static bool i8xx_fbc_enabled(struct drm_device *dev)
143 struct drm_i915_private *dev_priv = dev->dev_private;
145 return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
148 static void g4x_enable_fbc(struct drm_crtc *crtc)
150 struct drm_device *dev = crtc->dev;
151 struct drm_i915_private *dev_priv = dev->dev_private;
152 struct drm_framebuffer *fb = crtc->fb;
153 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
154 struct drm_i915_gem_object *obj = intel_fb->obj;
155 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
158 dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane) | DPFC_SR_EN;
159 if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
160 dpfc_ctl |= DPFC_CTL_LIMIT_2X;
162 dpfc_ctl |= DPFC_CTL_LIMIT_1X;
163 dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
165 I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
168 I915_WRITE(DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
170 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
173 static void g4x_disable_fbc(struct drm_device *dev)
175 struct drm_i915_private *dev_priv = dev->dev_private;
178 /* Disable compression */
179 dpfc_ctl = I915_READ(DPFC_CONTROL);
180 if (dpfc_ctl & DPFC_CTL_EN) {
181 dpfc_ctl &= ~DPFC_CTL_EN;
182 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
184 DRM_DEBUG_KMS("disabled FBC\n");
188 static bool g4x_fbc_enabled(struct drm_device *dev)
190 struct drm_i915_private *dev_priv = dev->dev_private;
192 return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
195 static void sandybridge_blit_fbc_update(struct drm_device *dev)
197 struct drm_i915_private *dev_priv = dev->dev_private;
200 /* Make sure blitter notifies FBC of writes */
202 /* Blitter is part of Media powerwell on VLV. No impact of
203 * his param in other platforms for now */
204 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA);
206 blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
207 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
208 GEN6_BLITTER_LOCK_SHIFT;
209 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
210 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
211 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
212 blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
213 GEN6_BLITTER_LOCK_SHIFT);
214 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
215 POSTING_READ(GEN6_BLITTER_ECOSKPD);
217 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA);
220 static void ironlake_enable_fbc(struct drm_crtc *crtc)
222 struct drm_device *dev = crtc->dev;
223 struct drm_i915_private *dev_priv = dev->dev_private;
224 struct drm_framebuffer *fb = crtc->fb;
225 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
226 struct drm_i915_gem_object *obj = intel_fb->obj;
227 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
230 dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane);
231 if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
232 dpfc_ctl |= DPFC_CTL_LIMIT_2X;
234 dpfc_ctl |= DPFC_CTL_LIMIT_1X;
235 dpfc_ctl |= DPFC_CTL_FENCE_EN;
237 dpfc_ctl |= obj->fence_reg;
239 I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
240 I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID);
242 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
245 I915_WRITE(SNB_DPFC_CTL_SA,
246 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
247 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
248 sandybridge_blit_fbc_update(dev);
251 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
254 static void ironlake_disable_fbc(struct drm_device *dev)
256 struct drm_i915_private *dev_priv = dev->dev_private;
259 /* Disable compression */
260 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
261 if (dpfc_ctl & DPFC_CTL_EN) {
262 dpfc_ctl &= ~DPFC_CTL_EN;
263 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
265 DRM_DEBUG_KMS("disabled FBC\n");
269 static bool ironlake_fbc_enabled(struct drm_device *dev)
271 struct drm_i915_private *dev_priv = dev->dev_private;
273 return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
276 static void gen7_enable_fbc(struct drm_crtc *crtc)
278 struct drm_device *dev = crtc->dev;
279 struct drm_i915_private *dev_priv = dev->dev_private;
280 struct drm_framebuffer *fb = crtc->fb;
281 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
282 struct drm_i915_gem_object *obj = intel_fb->obj;
283 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
286 dpfc_ctl = IVB_DPFC_CTL_PLANE(intel_crtc->plane);
287 if (drm_format_plane_cpp(fb->pixel_format, 0) == 2)
288 dpfc_ctl |= DPFC_CTL_LIMIT_2X;
290 dpfc_ctl |= DPFC_CTL_LIMIT_1X;
291 dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN;
293 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
295 if (IS_IVYBRIDGE(dev)) {
296 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
297 I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS);
299 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
300 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc->pipe),
301 HSW_BYPASS_FBC_QUEUE);
304 I915_WRITE(SNB_DPFC_CTL_SA,
305 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
306 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
308 sandybridge_blit_fbc_update(dev);
310 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
313 bool intel_fbc_enabled(struct drm_device *dev)
315 struct drm_i915_private *dev_priv = dev->dev_private;
317 if (!dev_priv->display.fbc_enabled)
320 return dev_priv->display.fbc_enabled(dev);
323 static void intel_fbc_work_fn(struct work_struct *__work)
325 struct intel_fbc_work *work =
326 container_of(to_delayed_work(__work),
327 struct intel_fbc_work, work);
328 struct drm_device *dev = work->crtc->dev;
329 struct drm_i915_private *dev_priv = dev->dev_private;
331 mutex_lock(&dev->struct_mutex);
332 if (work == dev_priv->fbc.fbc_work) {
333 /* Double check that we haven't switched fb without cancelling
336 if (work->crtc->fb == work->fb) {
337 dev_priv->display.enable_fbc(work->crtc);
339 dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane;
340 dev_priv->fbc.fb_id = work->crtc->fb->base.id;
341 dev_priv->fbc.y = work->crtc->y;
344 dev_priv->fbc.fbc_work = NULL;
346 mutex_unlock(&dev->struct_mutex);
351 static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv)
353 if (dev_priv->fbc.fbc_work == NULL)
356 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
358 /* Synchronisation is provided by struct_mutex and checking of
359 * dev_priv->fbc.fbc_work, so we can perform the cancellation
360 * entirely asynchronously.
362 if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work))
363 /* tasklet was killed before being run, clean up */
364 kfree(dev_priv->fbc.fbc_work);
366 /* Mark the work as no longer wanted so that if it does
367 * wake-up (because the work was already running and waiting
368 * for our mutex), it will discover that is no longer
371 dev_priv->fbc.fbc_work = NULL;
374 static void intel_enable_fbc(struct drm_crtc *crtc)
376 struct intel_fbc_work *work;
377 struct drm_device *dev = crtc->dev;
378 struct drm_i915_private *dev_priv = dev->dev_private;
380 if (!dev_priv->display.enable_fbc)
383 intel_cancel_fbc_work(dev_priv);
385 work = kzalloc(sizeof(*work), GFP_KERNEL);
387 DRM_ERROR("Failed to allocate FBC work structure\n");
388 dev_priv->display.enable_fbc(crtc);
394 INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn);
396 dev_priv->fbc.fbc_work = work;
398 /* Delay the actual enabling to let pageflipping cease and the
399 * display to settle before starting the compression. Note that
400 * this delay also serves a second purpose: it allows for a
401 * vblank to pass after disabling the FBC before we attempt
402 * to modify the control registers.
404 * A more complicated solution would involve tracking vblanks
405 * following the termination of the page-flipping sequence
406 * and indeed performing the enable as a co-routine and not
407 * waiting synchronously upon the vblank.
409 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
411 schedule_delayed_work(&work->work, msecs_to_jiffies(50));
414 void intel_disable_fbc(struct drm_device *dev)
416 struct drm_i915_private *dev_priv = dev->dev_private;
418 intel_cancel_fbc_work(dev_priv);
420 if (!dev_priv->display.disable_fbc)
423 dev_priv->display.disable_fbc(dev);
424 dev_priv->fbc.plane = -1;
427 static bool set_no_fbc_reason(struct drm_i915_private *dev_priv,
428 enum no_fbc_reason reason)
430 if (dev_priv->fbc.no_fbc_reason == reason)
433 dev_priv->fbc.no_fbc_reason = reason;
438 * intel_update_fbc - enable/disable FBC as needed
439 * @dev: the drm_device
441 * Set up the framebuffer compression hardware at mode set time. We
442 * enable it if possible:
443 * - plane A only (on pre-965)
444 * - no pixel mulitply/line duplication
445 * - no alpha buffer discard
447 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
449 * We can't assume that any compression will take place (worst case),
450 * so the compressed buffer has to be the same size as the uncompressed
451 * one. It also must reside (along with the line length buffer) in
454 * We need to enable/disable FBC on a global basis.
456 void intel_update_fbc(struct drm_device *dev)
458 struct drm_i915_private *dev_priv = dev->dev_private;
459 struct drm_crtc *crtc = NULL, *tmp_crtc;
460 struct intel_crtc *intel_crtc;
461 struct drm_framebuffer *fb;
462 struct intel_framebuffer *intel_fb;
463 struct drm_i915_gem_object *obj;
464 const struct drm_display_mode *adjusted_mode;
465 unsigned int max_width, max_height;
468 set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED);
472 if (!i915.powersave) {
473 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
474 DRM_DEBUG_KMS("fbc disabled per module param\n");
479 * If FBC is already on, we just have to verify that we can
480 * keep it that way...
481 * Need to disable if:
482 * - more than one pipe is active
483 * - changing FBC params (stride, fence, mode)
484 * - new fb is too large to fit in compressed buffer
485 * - going to an unsupported config (interlace, pixel multiply, etc.)
487 list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
488 if (intel_crtc_active(tmp_crtc) &&
489 to_intel_crtc(tmp_crtc)->primary_enabled) {
491 if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES))
492 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
499 if (!crtc || crtc->fb == NULL) {
500 if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT))
501 DRM_DEBUG_KMS("no output, disabling\n");
505 intel_crtc = to_intel_crtc(crtc);
507 intel_fb = to_intel_framebuffer(fb);
509 adjusted_mode = &intel_crtc->config.adjusted_mode;
511 if (i915.enable_fbc < 0 &&
512 INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) {
513 if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT))
514 DRM_DEBUG_KMS("disabled per chip default\n");
517 if (!i915.enable_fbc) {
518 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
519 DRM_DEBUG_KMS("fbc disabled per module param\n");
522 if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) ||
523 (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) {
524 if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
525 DRM_DEBUG_KMS("mode incompatible with compression, "
530 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
537 if (intel_crtc->config.pipe_src_w > max_width ||
538 intel_crtc->config.pipe_src_h > max_height) {
539 if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE))
540 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
543 if ((INTEL_INFO(dev)->gen < 4 || IS_HASWELL(dev)) &&
544 intel_crtc->plane != PLANE_A) {
545 if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE))
546 DRM_DEBUG_KMS("plane not A, disabling compression\n");
550 /* The use of a CPU fence is mandatory in order to detect writes
551 * by the CPU to the scanout and trigger updates to the FBC.
553 if (obj->tiling_mode != I915_TILING_X ||
554 obj->fence_reg == I915_FENCE_REG_NONE) {
555 if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED))
556 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
560 /* If the kernel debugger is active, always disable compression */
564 if (i915_gem_stolen_setup_compression(dev, intel_fb->obj->base.size)) {
565 if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL))
566 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
570 /* If the scanout has not changed, don't modify the FBC settings.
571 * Note that we make the fundamental assumption that the fb->obj
572 * cannot be unpinned (and have its GTT offset and fence revoked)
573 * without first being decoupled from the scanout and FBC disabled.
575 if (dev_priv->fbc.plane == intel_crtc->plane &&
576 dev_priv->fbc.fb_id == fb->base.id &&
577 dev_priv->fbc.y == crtc->y)
580 if (intel_fbc_enabled(dev)) {
581 /* We update FBC along two paths, after changing fb/crtc
582 * configuration (modeswitching) and after page-flipping
583 * finishes. For the latter, we know that not only did
584 * we disable the FBC at the start of the page-flip
585 * sequence, but also more than one vblank has passed.
587 * For the former case of modeswitching, it is possible
588 * to switch between two FBC valid configurations
589 * instantaneously so we do need to disable the FBC
590 * before we can modify its control registers. We also
591 * have to wait for the next vblank for that to take
592 * effect. However, since we delay enabling FBC we can
593 * assume that a vblank has passed since disabling and
594 * that we can safely alter the registers in the deferred
597 * In the scenario that we go from a valid to invalid
598 * and then back to valid FBC configuration we have
599 * no strict enforcement that a vblank occurred since
600 * disabling the FBC. However, along all current pipe
601 * disabling paths we do need to wait for a vblank at
602 * some point. And we wait before enabling FBC anyway.
604 DRM_DEBUG_KMS("disabling active FBC for update\n");
605 intel_disable_fbc(dev);
608 intel_enable_fbc(crtc);
609 dev_priv->fbc.no_fbc_reason = FBC_OK;
613 /* Multiple disables should be harmless */
614 if (intel_fbc_enabled(dev)) {
615 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
616 intel_disable_fbc(dev);
618 i915_gem_stolen_cleanup_compression(dev);
621 static void i915_pineview_get_mem_freq(struct drm_device *dev)
623 drm_i915_private_t *dev_priv = dev->dev_private;
626 tmp = I915_READ(CLKCFG);
628 switch (tmp & CLKCFG_FSB_MASK) {
630 dev_priv->fsb_freq = 533; /* 133*4 */
633 dev_priv->fsb_freq = 800; /* 200*4 */
636 dev_priv->fsb_freq = 667; /* 167*4 */
639 dev_priv->fsb_freq = 400; /* 100*4 */
643 switch (tmp & CLKCFG_MEM_MASK) {
645 dev_priv->mem_freq = 533;
648 dev_priv->mem_freq = 667;
651 dev_priv->mem_freq = 800;
655 /* detect pineview DDR3 setting */
656 tmp = I915_READ(CSHRDDR3CTL);
657 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
660 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
662 drm_i915_private_t *dev_priv = dev->dev_private;
665 ddrpll = I915_READ16(DDRMPLL1);
666 csipll = I915_READ16(CSIPLL0);
668 switch (ddrpll & 0xff) {
670 dev_priv->mem_freq = 800;
673 dev_priv->mem_freq = 1066;
676 dev_priv->mem_freq = 1333;
679 dev_priv->mem_freq = 1600;
682 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
684 dev_priv->mem_freq = 0;
688 dev_priv->ips.r_t = dev_priv->mem_freq;
690 switch (csipll & 0x3ff) {
692 dev_priv->fsb_freq = 3200;
695 dev_priv->fsb_freq = 3733;
698 dev_priv->fsb_freq = 4266;
701 dev_priv->fsb_freq = 4800;
704 dev_priv->fsb_freq = 5333;
707 dev_priv->fsb_freq = 5866;
710 dev_priv->fsb_freq = 6400;
713 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
715 dev_priv->fsb_freq = 0;
719 if (dev_priv->fsb_freq == 3200) {
720 dev_priv->ips.c_m = 0;
721 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
722 dev_priv->ips.c_m = 1;
724 dev_priv->ips.c_m = 2;
728 static const struct cxsr_latency cxsr_latency_table[] = {
729 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
730 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
731 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
732 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
733 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
735 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
736 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
737 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
738 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
739 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
741 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
742 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
743 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
744 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
745 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
747 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
748 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
749 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
750 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
751 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
753 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
754 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
755 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
756 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
757 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
759 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
760 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
761 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
762 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
763 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
766 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
771 const struct cxsr_latency *latency;
774 if (fsb == 0 || mem == 0)
777 for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
778 latency = &cxsr_latency_table[i];
779 if (is_desktop == latency->is_desktop &&
780 is_ddr3 == latency->is_ddr3 &&
781 fsb == latency->fsb_freq && mem == latency->mem_freq)
785 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
790 static void pineview_disable_cxsr(struct drm_device *dev)
792 struct drm_i915_private *dev_priv = dev->dev_private;
794 /* deactivate cxsr */
795 I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
799 * Latency for FIFO fetches is dependent on several factors:
800 * - memory configuration (speed, channels)
802 * - current MCH state
803 * It can be fairly high in some situations, so here we assume a fairly
804 * pessimal value. It's a tradeoff between extra memory fetches (if we
805 * set this value too high, the FIFO will fetch frequently to stay full)
806 * and power consumption (set it too low to save power and we might see
807 * FIFO underruns and display "flicker").
809 * A value of 5us seems to be a good balance; safe for very low end
810 * platforms but not overly aggressive on lower latency configs.
812 static const int latency_ns = 5000;
814 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
816 struct drm_i915_private *dev_priv = dev->dev_private;
817 uint32_t dsparb = I915_READ(DSPARB);
820 size = dsparb & 0x7f;
822 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
824 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
825 plane ? "B" : "A", size);
830 static int i830_get_fifo_size(struct drm_device *dev, int plane)
832 struct drm_i915_private *dev_priv = dev->dev_private;
833 uint32_t dsparb = I915_READ(DSPARB);
836 size = dsparb & 0x1ff;
838 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
839 size >>= 1; /* Convert to cachelines */
841 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
842 plane ? "B" : "A", size);
847 static int i845_get_fifo_size(struct drm_device *dev, int plane)
849 struct drm_i915_private *dev_priv = dev->dev_private;
850 uint32_t dsparb = I915_READ(DSPARB);
853 size = dsparb & 0x7f;
854 size >>= 2; /* Convert to cachelines */
856 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
863 /* Pineview has different values for various configs */
864 static const struct intel_watermark_params pineview_display_wm = {
865 PINEVIEW_DISPLAY_FIFO,
869 PINEVIEW_FIFO_LINE_SIZE
871 static const struct intel_watermark_params pineview_display_hplloff_wm = {
872 PINEVIEW_DISPLAY_FIFO,
874 PINEVIEW_DFT_HPLLOFF_WM,
876 PINEVIEW_FIFO_LINE_SIZE
878 static const struct intel_watermark_params pineview_cursor_wm = {
879 PINEVIEW_CURSOR_FIFO,
880 PINEVIEW_CURSOR_MAX_WM,
881 PINEVIEW_CURSOR_DFT_WM,
882 PINEVIEW_CURSOR_GUARD_WM,
883 PINEVIEW_FIFO_LINE_SIZE,
885 static const struct intel_watermark_params pineview_cursor_hplloff_wm = {
886 PINEVIEW_CURSOR_FIFO,
887 PINEVIEW_CURSOR_MAX_WM,
888 PINEVIEW_CURSOR_DFT_WM,
889 PINEVIEW_CURSOR_GUARD_WM,
890 PINEVIEW_FIFO_LINE_SIZE
892 static const struct intel_watermark_params g4x_wm_info = {
899 static const struct intel_watermark_params g4x_cursor_wm_info = {
906 static const struct intel_watermark_params valleyview_wm_info = {
907 VALLEYVIEW_FIFO_SIZE,
913 static const struct intel_watermark_params valleyview_cursor_wm_info = {
915 VALLEYVIEW_CURSOR_MAX_WM,
920 static const struct intel_watermark_params i965_cursor_wm_info = {
927 static const struct intel_watermark_params i945_wm_info = {
934 static const struct intel_watermark_params i915_wm_info = {
941 static const struct intel_watermark_params i830_wm_info = {
948 static const struct intel_watermark_params i845_wm_info = {
957 * intel_calculate_wm - calculate watermark level
958 * @clock_in_khz: pixel clock
959 * @wm: chip FIFO params
960 * @pixel_size: display pixel size
961 * @latency_ns: memory latency for the platform
963 * Calculate the watermark level (the level at which the display plane will
964 * start fetching from memory again). Each chip has a different display
965 * FIFO size and allocation, so the caller needs to figure that out and pass
966 * in the correct intel_watermark_params structure.
968 * As the pixel clock runs, the FIFO will be drained at a rate that depends
969 * on the pixel size. When it reaches the watermark level, it'll start
970 * fetching FIFO line sized based chunks from memory until the FIFO fills
971 * past the watermark point. If the FIFO drains completely, a FIFO underrun
972 * will occur, and a display engine hang could result.
974 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
975 const struct intel_watermark_params *wm,
978 unsigned long latency_ns)
980 long entries_required, wm_size;
983 * Note: we need to make sure we don't overflow for various clock &
985 * clocks go from a few thousand to several hundred thousand.
986 * latency is usually a few thousand
988 entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
990 entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
992 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
994 wm_size = fifo_size - (entries_required + wm->guard_size);
996 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
998 /* Don't promote wm_size to unsigned... */
999 if (wm_size > (long)wm->max_wm)
1000 wm_size = wm->max_wm;
1002 wm_size = wm->default_wm;
1006 static struct drm_crtc *single_enabled_crtc(struct drm_device *dev)
1008 struct drm_crtc *crtc, *enabled = NULL;
1010 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1011 if (intel_crtc_active(crtc)) {
1021 static void pineview_update_wm(struct drm_crtc *unused_crtc)
1023 struct drm_device *dev = unused_crtc->dev;
1024 struct drm_i915_private *dev_priv = dev->dev_private;
1025 struct drm_crtc *crtc;
1026 const struct cxsr_latency *latency;
1030 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
1031 dev_priv->fsb_freq, dev_priv->mem_freq);
1033 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1034 pineview_disable_cxsr(dev);
1038 crtc = single_enabled_crtc(dev);
1040 const struct drm_display_mode *adjusted_mode;
1041 int pixel_size = crtc->fb->bits_per_pixel / 8;
1044 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1045 clock = adjusted_mode->crtc_clock;
1048 wm = intel_calculate_wm(clock, &pineview_display_wm,
1049 pineview_display_wm.fifo_size,
1050 pixel_size, latency->display_sr);
1051 reg = I915_READ(DSPFW1);
1052 reg &= ~DSPFW_SR_MASK;
1053 reg |= wm << DSPFW_SR_SHIFT;
1054 I915_WRITE(DSPFW1, reg);
1055 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
1058 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
1059 pineview_display_wm.fifo_size,
1060 pixel_size, latency->cursor_sr);
1061 reg = I915_READ(DSPFW3);
1062 reg &= ~DSPFW_CURSOR_SR_MASK;
1063 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
1064 I915_WRITE(DSPFW3, reg);
1066 /* Display HPLL off SR */
1067 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
1068 pineview_display_hplloff_wm.fifo_size,
1069 pixel_size, latency->display_hpll_disable);
1070 reg = I915_READ(DSPFW3);
1071 reg &= ~DSPFW_HPLL_SR_MASK;
1072 reg |= wm & DSPFW_HPLL_SR_MASK;
1073 I915_WRITE(DSPFW3, reg);
1075 /* cursor HPLL off SR */
1076 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
1077 pineview_display_hplloff_wm.fifo_size,
1078 pixel_size, latency->cursor_hpll_disable);
1079 reg = I915_READ(DSPFW3);
1080 reg &= ~DSPFW_HPLL_CURSOR_MASK;
1081 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
1082 I915_WRITE(DSPFW3, reg);
1083 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
1087 I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
1088 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1090 pineview_disable_cxsr(dev);
1091 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1095 static bool g4x_compute_wm0(struct drm_device *dev,
1097 const struct intel_watermark_params *display,
1098 int display_latency_ns,
1099 const struct intel_watermark_params *cursor,
1100 int cursor_latency_ns,
1104 struct drm_crtc *crtc;
1105 const struct drm_display_mode *adjusted_mode;
1106 int htotal, hdisplay, clock, pixel_size;
1107 int line_time_us, line_count;
1108 int entries, tlb_miss;
1110 crtc = intel_get_crtc_for_plane(dev, plane);
1111 if (!intel_crtc_active(crtc)) {
1112 *cursor_wm = cursor->guard_size;
1113 *plane_wm = display->guard_size;
1117 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1118 clock = adjusted_mode->crtc_clock;
1119 htotal = adjusted_mode->crtc_htotal;
1120 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1121 pixel_size = crtc->fb->bits_per_pixel / 8;
1123 /* Use the small buffer method to calculate plane watermark */
1124 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
1125 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
1127 entries += tlb_miss;
1128 entries = DIV_ROUND_UP(entries, display->cacheline_size);
1129 *plane_wm = entries + display->guard_size;
1130 if (*plane_wm > (int)display->max_wm)
1131 *plane_wm = display->max_wm;
1133 /* Use the large buffer method to calculate cursor watermark */
1134 line_time_us = ((htotal * 1000) / clock);
1135 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
1136 entries = line_count * 64 * pixel_size;
1137 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
1139 entries += tlb_miss;
1140 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1141 *cursor_wm = entries + cursor->guard_size;
1142 if (*cursor_wm > (int)cursor->max_wm)
1143 *cursor_wm = (int)cursor->max_wm;
1149 * Check the wm result.
1151 * If any calculated watermark values is larger than the maximum value that
1152 * can be programmed into the associated watermark register, that watermark
1155 static bool g4x_check_srwm(struct drm_device *dev,
1156 int display_wm, int cursor_wm,
1157 const struct intel_watermark_params *display,
1158 const struct intel_watermark_params *cursor)
1160 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1161 display_wm, cursor_wm);
1163 if (display_wm > display->max_wm) {
1164 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1165 display_wm, display->max_wm);
1169 if (cursor_wm > cursor->max_wm) {
1170 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1171 cursor_wm, cursor->max_wm);
1175 if (!(display_wm || cursor_wm)) {
1176 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1183 static bool g4x_compute_srwm(struct drm_device *dev,
1186 const struct intel_watermark_params *display,
1187 const struct intel_watermark_params *cursor,
1188 int *display_wm, int *cursor_wm)
1190 struct drm_crtc *crtc;
1191 const struct drm_display_mode *adjusted_mode;
1192 int hdisplay, htotal, pixel_size, clock;
1193 unsigned long line_time_us;
1194 int line_count, line_size;
1199 *display_wm = *cursor_wm = 0;
1203 crtc = intel_get_crtc_for_plane(dev, plane);
1204 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1205 clock = adjusted_mode->crtc_clock;
1206 htotal = adjusted_mode->crtc_htotal;
1207 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1208 pixel_size = crtc->fb->bits_per_pixel / 8;
1210 line_time_us = (htotal * 1000) / clock;
1211 line_count = (latency_ns / line_time_us + 1000) / 1000;
1212 line_size = hdisplay * pixel_size;
1214 /* Use the minimum of the small and large buffer method for primary */
1215 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1216 large = line_count * line_size;
1218 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
1219 *display_wm = entries + display->guard_size;
1221 /* calculate the self-refresh watermark for display cursor */
1222 entries = line_count * pixel_size * 64;
1223 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1224 *cursor_wm = entries + cursor->guard_size;
1226 return g4x_check_srwm(dev,
1227 *display_wm, *cursor_wm,
1231 static bool vlv_compute_drain_latency(struct drm_device *dev,
1233 int *plane_prec_mult,
1235 int *cursor_prec_mult,
1238 struct drm_crtc *crtc;
1239 int clock, pixel_size;
1242 crtc = intel_get_crtc_for_plane(dev, plane);
1243 if (!intel_crtc_active(crtc))
1246 clock = to_intel_crtc(crtc)->config.adjusted_mode.crtc_clock;
1247 pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */
1249 entries = (clock / 1000) * pixel_size;
1250 *plane_prec_mult = (entries > 256) ?
1251 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1252 *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) *
1255 entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */
1256 *cursor_prec_mult = (entries > 256) ?
1257 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1258 *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4);
1264 * Update drain latency registers of memory arbiter
1266 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1267 * to be programmed. Each plane has a drain latency multiplier and a drain
1271 static void vlv_update_drain_latency(struct drm_device *dev)
1273 struct drm_i915_private *dev_priv = dev->dev_private;
1274 int planea_prec, planea_dl, planeb_prec, planeb_dl;
1275 int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl;
1276 int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is
1279 /* For plane A, Cursor A */
1280 if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl,
1281 &cursor_prec_mult, &cursora_dl)) {
1282 cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1283 DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16;
1284 planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1285 DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16;
1287 I915_WRITE(VLV_DDL1, cursora_prec |
1288 (cursora_dl << DDL_CURSORA_SHIFT) |
1289 planea_prec | planea_dl);
1292 /* For plane B, Cursor B */
1293 if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl,
1294 &cursor_prec_mult, &cursorb_dl)) {
1295 cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1296 DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16;
1297 planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1298 DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16;
1300 I915_WRITE(VLV_DDL2, cursorb_prec |
1301 (cursorb_dl << DDL_CURSORB_SHIFT) |
1302 planeb_prec | planeb_dl);
1306 #define single_plane_enabled(mask) is_power_of_2(mask)
1308 static void valleyview_update_wm(struct drm_crtc *crtc)
1310 struct drm_device *dev = crtc->dev;
1311 static const int sr_latency_ns = 12000;
1312 struct drm_i915_private *dev_priv = dev->dev_private;
1313 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1314 int plane_sr, cursor_sr;
1315 int ignore_plane_sr, ignore_cursor_sr;
1316 unsigned int enabled = 0;
1318 vlv_update_drain_latency(dev);
1320 if (g4x_compute_wm0(dev, PIPE_A,
1321 &valleyview_wm_info, latency_ns,
1322 &valleyview_cursor_wm_info, latency_ns,
1323 &planea_wm, &cursora_wm))
1324 enabled |= 1 << PIPE_A;
1326 if (g4x_compute_wm0(dev, PIPE_B,
1327 &valleyview_wm_info, latency_ns,
1328 &valleyview_cursor_wm_info, latency_ns,
1329 &planeb_wm, &cursorb_wm))
1330 enabled |= 1 << PIPE_B;
1332 if (single_plane_enabled(enabled) &&
1333 g4x_compute_srwm(dev, ffs(enabled) - 1,
1335 &valleyview_wm_info,
1336 &valleyview_cursor_wm_info,
1337 &plane_sr, &ignore_cursor_sr) &&
1338 g4x_compute_srwm(dev, ffs(enabled) - 1,
1340 &valleyview_wm_info,
1341 &valleyview_cursor_wm_info,
1342 &ignore_plane_sr, &cursor_sr)) {
1343 I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN);
1345 I915_WRITE(FW_BLC_SELF_VLV,
1346 I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN);
1347 plane_sr = cursor_sr = 0;
1350 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1351 planea_wm, cursora_wm,
1352 planeb_wm, cursorb_wm,
1353 plane_sr, cursor_sr);
1356 (plane_sr << DSPFW_SR_SHIFT) |
1357 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1358 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1361 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1362 (cursora_wm << DSPFW_CURSORA_SHIFT));
1364 (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) |
1365 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1368 static void g4x_update_wm(struct drm_crtc *crtc)
1370 struct drm_device *dev = crtc->dev;
1371 static const int sr_latency_ns = 12000;
1372 struct drm_i915_private *dev_priv = dev->dev_private;
1373 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1374 int plane_sr, cursor_sr;
1375 unsigned int enabled = 0;
1377 if (g4x_compute_wm0(dev, PIPE_A,
1378 &g4x_wm_info, latency_ns,
1379 &g4x_cursor_wm_info, latency_ns,
1380 &planea_wm, &cursora_wm))
1381 enabled |= 1 << PIPE_A;
1383 if (g4x_compute_wm0(dev, PIPE_B,
1384 &g4x_wm_info, latency_ns,
1385 &g4x_cursor_wm_info, latency_ns,
1386 &planeb_wm, &cursorb_wm))
1387 enabled |= 1 << PIPE_B;
1389 if (single_plane_enabled(enabled) &&
1390 g4x_compute_srwm(dev, ffs(enabled) - 1,
1393 &g4x_cursor_wm_info,
1394 &plane_sr, &cursor_sr)) {
1395 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1397 I915_WRITE(FW_BLC_SELF,
1398 I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN);
1399 plane_sr = cursor_sr = 0;
1402 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1403 planea_wm, cursora_wm,
1404 planeb_wm, cursorb_wm,
1405 plane_sr, cursor_sr);
1408 (plane_sr << DSPFW_SR_SHIFT) |
1409 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1410 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1413 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1414 (cursora_wm << DSPFW_CURSORA_SHIFT));
1415 /* HPLL off in SR has some issues on G4x... disable it */
1417 (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) |
1418 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1421 static void i965_update_wm(struct drm_crtc *unused_crtc)
1423 struct drm_device *dev = unused_crtc->dev;
1424 struct drm_i915_private *dev_priv = dev->dev_private;
1425 struct drm_crtc *crtc;
1429 /* Calc sr entries for one plane configs */
1430 crtc = single_enabled_crtc(dev);
1432 /* self-refresh has much higher latency */
1433 static const int sr_latency_ns = 12000;
1434 const struct drm_display_mode *adjusted_mode =
1435 &to_intel_crtc(crtc)->config.adjusted_mode;
1436 int clock = adjusted_mode->crtc_clock;
1437 int htotal = adjusted_mode->crtc_htotal;
1438 int hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1439 int pixel_size = crtc->fb->bits_per_pixel / 8;
1440 unsigned long line_time_us;
1443 line_time_us = ((htotal * 1000) / clock);
1445 /* Use ns/us then divide to preserve precision */
1446 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1447 pixel_size * hdisplay;
1448 entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
1449 srwm = I965_FIFO_SIZE - entries;
1453 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1456 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1458 entries = DIV_ROUND_UP(entries,
1459 i965_cursor_wm_info.cacheline_size);
1460 cursor_sr = i965_cursor_wm_info.fifo_size -
1461 (entries + i965_cursor_wm_info.guard_size);
1463 if (cursor_sr > i965_cursor_wm_info.max_wm)
1464 cursor_sr = i965_cursor_wm_info.max_wm;
1466 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1467 "cursor %d\n", srwm, cursor_sr);
1469 if (IS_CRESTLINE(dev))
1470 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1472 /* Turn off self refresh if both pipes are enabled */
1473 if (IS_CRESTLINE(dev))
1474 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
1478 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1481 /* 965 has limitations... */
1482 I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) |
1483 (8 << 16) | (8 << 8) | (8 << 0));
1484 I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
1485 /* update cursor SR watermark */
1486 I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1489 static void i9xx_update_wm(struct drm_crtc *unused_crtc)
1491 struct drm_device *dev = unused_crtc->dev;
1492 struct drm_i915_private *dev_priv = dev->dev_private;
1493 const struct intel_watermark_params *wm_info;
1498 int planea_wm, planeb_wm;
1499 struct drm_crtc *crtc, *enabled = NULL;
1502 wm_info = &i945_wm_info;
1503 else if (!IS_GEN2(dev))
1504 wm_info = &i915_wm_info;
1506 wm_info = &i830_wm_info;
1508 fifo_size = dev_priv->display.get_fifo_size(dev, 0);
1509 crtc = intel_get_crtc_for_plane(dev, 0);
1510 if (intel_crtc_active(crtc)) {
1511 const struct drm_display_mode *adjusted_mode;
1512 int cpp = crtc->fb->bits_per_pixel / 8;
1516 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1517 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1518 wm_info, fifo_size, cpp,
1522 planea_wm = fifo_size - wm_info->guard_size;
1524 fifo_size = dev_priv->display.get_fifo_size(dev, 1);
1525 crtc = intel_get_crtc_for_plane(dev, 1);
1526 if (intel_crtc_active(crtc)) {
1527 const struct drm_display_mode *adjusted_mode;
1528 int cpp = crtc->fb->bits_per_pixel / 8;
1532 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1533 planeb_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1534 wm_info, fifo_size, cpp,
1536 if (enabled == NULL)
1541 planeb_wm = fifo_size - wm_info->guard_size;
1543 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
1546 * Overlay gets an aggressive default since video jitter is bad.
1550 /* Play safe and disable self-refresh before adjusting watermarks. */
1551 if (IS_I945G(dev) || IS_I945GM(dev))
1552 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0);
1553 else if (IS_I915GM(dev))
1554 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_SELF_EN));
1556 /* Calc sr entries for one plane configs */
1557 if (HAS_FW_BLC(dev) && enabled) {
1558 /* self-refresh has much higher latency */
1559 static const int sr_latency_ns = 6000;
1560 const struct drm_display_mode *adjusted_mode =
1561 &to_intel_crtc(enabled)->config.adjusted_mode;
1562 int clock = adjusted_mode->crtc_clock;
1563 int htotal = adjusted_mode->crtc_htotal;
1564 int hdisplay = to_intel_crtc(enabled)->config.pipe_src_w;
1565 int pixel_size = enabled->fb->bits_per_pixel / 8;
1566 unsigned long line_time_us;
1569 line_time_us = (htotal * 1000) / clock;
1571 /* Use ns/us then divide to preserve precision */
1572 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1573 pixel_size * hdisplay;
1574 entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
1575 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
1576 srwm = wm_info->fifo_size - entries;
1580 if (IS_I945G(dev) || IS_I945GM(dev))
1581 I915_WRITE(FW_BLC_SELF,
1582 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
1583 else if (IS_I915GM(dev))
1584 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
1587 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1588 planea_wm, planeb_wm, cwm, srwm);
1590 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
1591 fwater_hi = (cwm & 0x1f);
1593 /* Set request length to 8 cachelines per fetch */
1594 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
1595 fwater_hi = fwater_hi | (1 << 8);
1597 I915_WRITE(FW_BLC, fwater_lo);
1598 I915_WRITE(FW_BLC2, fwater_hi);
1600 if (HAS_FW_BLC(dev)) {
1602 if (IS_I945G(dev) || IS_I945GM(dev))
1603 I915_WRITE(FW_BLC_SELF,
1604 FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
1605 else if (IS_I915GM(dev))
1606 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_SELF_EN));
1607 DRM_DEBUG_KMS("memory self refresh enabled\n");
1609 DRM_DEBUG_KMS("memory self refresh disabled\n");
1613 static void i845_update_wm(struct drm_crtc *unused_crtc)
1615 struct drm_device *dev = unused_crtc->dev;
1616 struct drm_i915_private *dev_priv = dev->dev_private;
1617 struct drm_crtc *crtc;
1618 const struct drm_display_mode *adjusted_mode;
1622 crtc = single_enabled_crtc(dev);
1626 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1627 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1629 dev_priv->display.get_fifo_size(dev, 0),
1631 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
1632 fwater_lo |= (3<<8) | planea_wm;
1634 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
1636 I915_WRITE(FW_BLC, fwater_lo);
1639 static uint32_t ilk_pipe_pixel_rate(struct drm_device *dev,
1640 struct drm_crtc *crtc)
1642 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1643 uint32_t pixel_rate;
1645 pixel_rate = intel_crtc->config.adjusted_mode.crtc_clock;
1647 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
1648 * adjust the pixel_rate here. */
1650 if (intel_crtc->config.pch_pfit.enabled) {
1651 uint64_t pipe_w, pipe_h, pfit_w, pfit_h;
1652 uint32_t pfit_size = intel_crtc->config.pch_pfit.size;
1654 pipe_w = intel_crtc->config.pipe_src_w;
1655 pipe_h = intel_crtc->config.pipe_src_h;
1656 pfit_w = (pfit_size >> 16) & 0xFFFF;
1657 pfit_h = pfit_size & 0xFFFF;
1658 if (pipe_w < pfit_w)
1660 if (pipe_h < pfit_h)
1663 pixel_rate = div_u64((uint64_t) pixel_rate * pipe_w * pipe_h,
1670 /* latency must be in 0.1us units. */
1671 static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel,
1676 if (WARN(latency == 0, "Latency value missing\n"))
1679 ret = (uint64_t) pixel_rate * bytes_per_pixel * latency;
1680 ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2;
1685 /* latency must be in 0.1us units. */
1686 static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
1687 uint32_t horiz_pixels, uint8_t bytes_per_pixel,
1692 if (WARN(latency == 0, "Latency value missing\n"))
1695 ret = (latency * pixel_rate) / (pipe_htotal * 10000);
1696 ret = (ret + 1) * horiz_pixels * bytes_per_pixel;
1697 ret = DIV_ROUND_UP(ret, 64) + 2;
1701 static uint32_t ilk_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels,
1702 uint8_t bytes_per_pixel)
1704 return DIV_ROUND_UP(pri_val * 64, horiz_pixels * bytes_per_pixel) + 2;
1707 struct ilk_pipe_wm_parameters {
1709 uint32_t pipe_htotal;
1710 uint32_t pixel_rate;
1711 struct intel_plane_wm_parameters pri;
1712 struct intel_plane_wm_parameters spr;
1713 struct intel_plane_wm_parameters cur;
1716 struct ilk_wm_maximums {
1723 /* used in computing the new watermarks state */
1724 struct intel_wm_config {
1725 unsigned int num_pipes_active;
1726 bool sprites_enabled;
1727 bool sprites_scaled;
1731 * For both WM_PIPE and WM_LP.
1732 * mem_value must be in 0.1us units.
1734 static uint32_t ilk_compute_pri_wm(const struct ilk_pipe_wm_parameters *params,
1738 uint32_t method1, method2;
1740 if (!params->active || !params->pri.enabled)
1743 method1 = ilk_wm_method1(params->pixel_rate,
1744 params->pri.bytes_per_pixel,
1750 method2 = ilk_wm_method2(params->pixel_rate,
1751 params->pipe_htotal,
1752 params->pri.horiz_pixels,
1753 params->pri.bytes_per_pixel,
1756 return min(method1, method2);
1760 * For both WM_PIPE and WM_LP.
1761 * mem_value must be in 0.1us units.
1763 static uint32_t ilk_compute_spr_wm(const struct ilk_pipe_wm_parameters *params,
1766 uint32_t method1, method2;
1768 if (!params->active || !params->spr.enabled)
1771 method1 = ilk_wm_method1(params->pixel_rate,
1772 params->spr.bytes_per_pixel,
1774 method2 = ilk_wm_method2(params->pixel_rate,
1775 params->pipe_htotal,
1776 params->spr.horiz_pixels,
1777 params->spr.bytes_per_pixel,
1779 return min(method1, method2);
1783 * For both WM_PIPE and WM_LP.
1784 * mem_value must be in 0.1us units.
1786 static uint32_t ilk_compute_cur_wm(const struct ilk_pipe_wm_parameters *params,
1789 if (!params->active || !params->cur.enabled)
1792 return ilk_wm_method2(params->pixel_rate,
1793 params->pipe_htotal,
1794 params->cur.horiz_pixels,
1795 params->cur.bytes_per_pixel,
1799 /* Only for WM_LP. */
1800 static uint32_t ilk_compute_fbc_wm(const struct ilk_pipe_wm_parameters *params,
1803 if (!params->active || !params->pri.enabled)
1806 return ilk_wm_fbc(pri_val,
1807 params->pri.horiz_pixels,
1808 params->pri.bytes_per_pixel);
1811 static unsigned int ilk_display_fifo_size(const struct drm_device *dev)
1813 if (INTEL_INFO(dev)->gen >= 8)
1815 else if (INTEL_INFO(dev)->gen >= 7)
1821 /* Calculate the maximum primary/sprite plane watermark */
1822 static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
1824 const struct intel_wm_config *config,
1825 enum intel_ddb_partitioning ddb_partitioning,
1828 unsigned int fifo_size = ilk_display_fifo_size(dev);
1831 /* if sprites aren't enabled, sprites get nothing */
1832 if (is_sprite && !config->sprites_enabled)
1835 /* HSW allows LP1+ watermarks even with multiple pipes */
1836 if (level == 0 || config->num_pipes_active > 1) {
1837 fifo_size /= INTEL_INFO(dev)->num_pipes;
1840 * For some reason the non self refresh
1841 * FIFO size is only half of the self
1842 * refresh FIFO size on ILK/SNB.
1844 if (INTEL_INFO(dev)->gen <= 6)
1848 if (config->sprites_enabled) {
1849 /* level 0 is always calculated with 1:1 split */
1850 if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) {
1859 /* clamp to max that the registers can hold */
1860 if (INTEL_INFO(dev)->gen >= 8)
1861 max = level == 0 ? 255 : 2047;
1862 else if (INTEL_INFO(dev)->gen >= 7)
1863 /* IVB/HSW primary/sprite plane watermarks */
1864 max = level == 0 ? 127 : 1023;
1865 else if (!is_sprite)
1866 /* ILK/SNB primary plane watermarks */
1867 max = level == 0 ? 127 : 511;
1869 /* ILK/SNB sprite plane watermarks */
1870 max = level == 0 ? 63 : 255;
1872 return min(fifo_size, max);
1875 /* Calculate the maximum cursor plane watermark */
1876 static unsigned int ilk_cursor_wm_max(const struct drm_device *dev,
1878 const struct intel_wm_config *config)
1880 /* HSW LP1+ watermarks w/ multiple pipes */
1881 if (level > 0 && config->num_pipes_active > 1)
1884 /* otherwise just report max that registers can hold */
1885 if (INTEL_INFO(dev)->gen >= 7)
1886 return level == 0 ? 63 : 255;
1888 return level == 0 ? 31 : 63;
1891 /* Calculate the maximum FBC watermark */
1892 static unsigned int ilk_fbc_wm_max(const struct drm_device *dev)
1894 /* max that registers can hold */
1895 if (INTEL_INFO(dev)->gen >= 8)
1901 static void ilk_compute_wm_maximums(const struct drm_device *dev,
1903 const struct intel_wm_config *config,
1904 enum intel_ddb_partitioning ddb_partitioning,
1905 struct ilk_wm_maximums *max)
1907 max->pri = ilk_plane_wm_max(dev, level, config, ddb_partitioning, false);
1908 max->spr = ilk_plane_wm_max(dev, level, config, ddb_partitioning, true);
1909 max->cur = ilk_cursor_wm_max(dev, level, config);
1910 max->fbc = ilk_fbc_wm_max(dev);
1913 static bool ilk_validate_wm_level(int level,
1914 const struct ilk_wm_maximums *max,
1915 struct intel_wm_level *result)
1919 /* already determined to be invalid? */
1920 if (!result->enable)
1923 result->enable = result->pri_val <= max->pri &&
1924 result->spr_val <= max->spr &&
1925 result->cur_val <= max->cur;
1927 ret = result->enable;
1930 * HACK until we can pre-compute everything,
1931 * and thus fail gracefully if LP0 watermarks
1934 if (level == 0 && !result->enable) {
1935 if (result->pri_val > max->pri)
1936 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
1937 level, result->pri_val, max->pri);
1938 if (result->spr_val > max->spr)
1939 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
1940 level, result->spr_val, max->spr);
1941 if (result->cur_val > max->cur)
1942 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
1943 level, result->cur_val, max->cur);
1945 result->pri_val = min_t(uint32_t, result->pri_val, max->pri);
1946 result->spr_val = min_t(uint32_t, result->spr_val, max->spr);
1947 result->cur_val = min_t(uint32_t, result->cur_val, max->cur);
1948 result->enable = true;
1954 static void ilk_compute_wm_level(const struct drm_i915_private *dev_priv,
1956 const struct ilk_pipe_wm_parameters *p,
1957 struct intel_wm_level *result)
1959 uint16_t pri_latency = dev_priv->wm.pri_latency[level];
1960 uint16_t spr_latency = dev_priv->wm.spr_latency[level];
1961 uint16_t cur_latency = dev_priv->wm.cur_latency[level];
1963 /* WM1+ latency values stored in 0.5us units */
1970 result->pri_val = ilk_compute_pri_wm(p, pri_latency, level);
1971 result->spr_val = ilk_compute_spr_wm(p, spr_latency);
1972 result->cur_val = ilk_compute_cur_wm(p, cur_latency);
1973 result->fbc_val = ilk_compute_fbc_wm(p, result->pri_val);
1974 result->enable = true;
1978 hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
1980 struct drm_i915_private *dev_priv = dev->dev_private;
1981 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1982 struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode;
1983 u32 linetime, ips_linetime;
1985 if (!intel_crtc_active(crtc))
1988 /* The WM are computed with base on how long it takes to fill a single
1989 * row at the given clock rate, multiplied by 8.
1991 linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
1993 ips_linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
1994 intel_ddi_get_cdclk_freq(dev_priv));
1996 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
1997 PIPE_WM_LINETIME_TIME(linetime);
2000 static void intel_read_wm_latency(struct drm_device *dev, uint16_t wm[5])
2002 struct drm_i915_private *dev_priv = dev->dev_private;
2004 if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
2005 uint64_t sskpd = I915_READ64(MCH_SSKPD);
2007 wm[0] = (sskpd >> 56) & 0xFF;
2009 wm[0] = sskpd & 0xF;
2010 wm[1] = (sskpd >> 4) & 0xFF;
2011 wm[2] = (sskpd >> 12) & 0xFF;
2012 wm[3] = (sskpd >> 20) & 0x1FF;
2013 wm[4] = (sskpd >> 32) & 0x1FF;
2014 } else if (INTEL_INFO(dev)->gen >= 6) {
2015 uint32_t sskpd = I915_READ(MCH_SSKPD);
2017 wm[0] = (sskpd >> SSKPD_WM0_SHIFT) & SSKPD_WM_MASK;
2018 wm[1] = (sskpd >> SSKPD_WM1_SHIFT) & SSKPD_WM_MASK;
2019 wm[2] = (sskpd >> SSKPD_WM2_SHIFT) & SSKPD_WM_MASK;
2020 wm[3] = (sskpd >> SSKPD_WM3_SHIFT) & SSKPD_WM_MASK;
2021 } else if (INTEL_INFO(dev)->gen >= 5) {
2022 uint32_t mltr = I915_READ(MLTR_ILK);
2024 /* ILK primary LP0 latency is 700 ns */
2026 wm[1] = (mltr >> MLTR_WM1_SHIFT) & ILK_SRLT_MASK;
2027 wm[2] = (mltr >> MLTR_WM2_SHIFT) & ILK_SRLT_MASK;
2031 static void intel_fixup_spr_wm_latency(struct drm_device *dev, uint16_t wm[5])
2033 /* ILK sprite LP0 latency is 1300 ns */
2034 if (INTEL_INFO(dev)->gen == 5)
2038 static void intel_fixup_cur_wm_latency(struct drm_device *dev, uint16_t wm[5])
2040 /* ILK cursor LP0 latency is 1300 ns */
2041 if (INTEL_INFO(dev)->gen == 5)
2044 /* WaDoubleCursorLP3Latency:ivb */
2045 if (IS_IVYBRIDGE(dev))
2049 static int ilk_wm_max_level(const struct drm_device *dev)
2051 /* how many WM levels are we expecting */
2052 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2054 else if (INTEL_INFO(dev)->gen >= 6)
2060 static void intel_print_wm_latency(struct drm_device *dev,
2062 const uint16_t wm[5])
2064 int level, max_level = ilk_wm_max_level(dev);
2066 for (level = 0; level <= max_level; level++) {
2067 unsigned int latency = wm[level];
2070 DRM_ERROR("%s WM%d latency not provided\n",
2075 /* WM1+ latency values in 0.5us units */
2079 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2080 name, level, wm[level],
2081 latency / 10, latency % 10);
2085 static void intel_setup_wm_latency(struct drm_device *dev)
2087 struct drm_i915_private *dev_priv = dev->dev_private;
2089 intel_read_wm_latency(dev, dev_priv->wm.pri_latency);
2091 memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency,
2092 sizeof(dev_priv->wm.pri_latency));
2093 memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency,
2094 sizeof(dev_priv->wm.pri_latency));
2096 intel_fixup_spr_wm_latency(dev, dev_priv->wm.spr_latency);
2097 intel_fixup_cur_wm_latency(dev, dev_priv->wm.cur_latency);
2099 intel_print_wm_latency(dev, "Primary", dev_priv->wm.pri_latency);
2100 intel_print_wm_latency(dev, "Sprite", dev_priv->wm.spr_latency);
2101 intel_print_wm_latency(dev, "Cursor", dev_priv->wm.cur_latency);
2104 static void ilk_compute_wm_parameters(struct drm_crtc *crtc,
2105 struct ilk_pipe_wm_parameters *p,
2106 struct intel_wm_config *config)
2108 struct drm_device *dev = crtc->dev;
2109 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2110 enum pipe pipe = intel_crtc->pipe;
2111 struct drm_plane *plane;
2113 p->active = intel_crtc_active(crtc);
2115 p->pipe_htotal = intel_crtc->config.adjusted_mode.crtc_htotal;
2116 p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc);
2117 p->pri.bytes_per_pixel = crtc->fb->bits_per_pixel / 8;
2118 p->cur.bytes_per_pixel = 4;
2119 p->pri.horiz_pixels = intel_crtc->config.pipe_src_w;
2120 p->cur.horiz_pixels = 64;
2121 /* TODO: for now, assume primary and cursor planes are always enabled. */
2122 p->pri.enabled = true;
2123 p->cur.enabled = true;
2126 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
2127 config->num_pipes_active += intel_crtc_active(crtc);
2129 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
2130 struct intel_plane *intel_plane = to_intel_plane(plane);
2132 if (intel_plane->pipe == pipe)
2133 p->spr = intel_plane->wm;
2135 config->sprites_enabled |= intel_plane->wm.enabled;
2136 config->sprites_scaled |= intel_plane->wm.scaled;
2140 /* Compute new watermarks for the pipe */
2141 static bool intel_compute_pipe_wm(struct drm_crtc *crtc,
2142 const struct ilk_pipe_wm_parameters *params,
2143 struct intel_pipe_wm *pipe_wm)
2145 struct drm_device *dev = crtc->dev;
2146 const struct drm_i915_private *dev_priv = dev->dev_private;
2147 int level, max_level = ilk_wm_max_level(dev);
2148 /* LP0 watermark maximums depend on this pipe alone */
2149 struct intel_wm_config config = {
2150 .num_pipes_active = 1,
2151 .sprites_enabled = params->spr.enabled,
2152 .sprites_scaled = params->spr.scaled,
2154 struct ilk_wm_maximums max;
2156 /* LP0 watermarks always use 1/2 DDB partitioning */
2157 ilk_compute_wm_maximums(dev, 0, &config, INTEL_DDB_PART_1_2, &max);
2159 /* ILK/SNB: LP2+ watermarks only w/o sprites */
2160 if (INTEL_INFO(dev)->gen <= 6 && params->spr.enabled)
2163 /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */
2164 if (params->spr.scaled)
2167 for (level = 0; level <= max_level; level++)
2168 ilk_compute_wm_level(dev_priv, level, params,
2169 &pipe_wm->wm[level]);
2171 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2172 pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc);
2174 /* At least LP0 must be valid */
2175 return ilk_validate_wm_level(0, &max, &pipe_wm->wm[0]);
2179 * Merge the watermarks from all active pipes for a specific level.
2181 static void ilk_merge_wm_level(struct drm_device *dev,
2183 struct intel_wm_level *ret_wm)
2185 const struct intel_crtc *intel_crtc;
2187 list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
2188 const struct intel_wm_level *wm =
2189 &intel_crtc->wm.active.wm[level];
2194 ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val);
2195 ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val);
2196 ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val);
2197 ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val);
2200 ret_wm->enable = true;
2204 * Merge all low power watermarks for all active pipes.
2206 static void ilk_wm_merge(struct drm_device *dev,
2207 const struct intel_wm_config *config,
2208 const struct ilk_wm_maximums *max,
2209 struct intel_pipe_wm *merged)
2211 int level, max_level = ilk_wm_max_level(dev);
2213 /* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */
2214 if ((INTEL_INFO(dev)->gen <= 6 || IS_IVYBRIDGE(dev)) &&
2215 config->num_pipes_active > 1)
2218 /* ILK: FBC WM must be disabled always */
2219 merged->fbc_wm_enabled = INTEL_INFO(dev)->gen >= 6;
2221 /* merge each WM1+ level */
2222 for (level = 1; level <= max_level; level++) {
2223 struct intel_wm_level *wm = &merged->wm[level];
2225 ilk_merge_wm_level(dev, level, wm);
2227 if (!ilk_validate_wm_level(level, max, wm))
2231 * The spec says it is preferred to disable
2232 * FBC WMs instead of disabling a WM level.
2234 if (wm->fbc_val > max->fbc) {
2235 merged->fbc_wm_enabled = false;
2240 /* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */
2242 * FIXME this is racy. FBC might get enabled later.
2243 * What we should check here is whether FBC can be
2244 * enabled sometime later.
2246 if (IS_GEN5(dev) && !merged->fbc_wm_enabled && intel_fbc_enabled(dev)) {
2247 for (level = 2; level <= max_level; level++) {
2248 struct intel_wm_level *wm = &merged->wm[level];
2255 static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm)
2257 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2258 return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable);
2261 /* The value we need to program into the WM_LPx latency field */
2262 static unsigned int ilk_wm_lp_latency(struct drm_device *dev, int level)
2264 struct drm_i915_private *dev_priv = dev->dev_private;
2266 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2269 return dev_priv->wm.pri_latency[level];
2272 static void ilk_compute_wm_results(struct drm_device *dev,
2273 const struct intel_pipe_wm *merged,
2274 enum intel_ddb_partitioning partitioning,
2275 struct ilk_wm_values *results)
2277 struct intel_crtc *intel_crtc;
2280 results->enable_fbc_wm = merged->fbc_wm_enabled;
2281 results->partitioning = partitioning;
2283 /* LP1+ register values */
2284 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2285 const struct intel_wm_level *r;
2287 level = ilk_wm_lp_to_level(wm_lp, merged);
2289 r = &merged->wm[level];
2293 results->wm_lp[wm_lp - 1] = WM3_LP_EN |
2294 (ilk_wm_lp_latency(dev, level) << WM1_LP_LATENCY_SHIFT) |
2295 (r->pri_val << WM1_LP_SR_SHIFT) |
2298 if (INTEL_INFO(dev)->gen >= 8)
2299 results->wm_lp[wm_lp - 1] |=
2300 r->fbc_val << WM1_LP_FBC_SHIFT_BDW;
2302 results->wm_lp[wm_lp - 1] |=
2303 r->fbc_val << WM1_LP_FBC_SHIFT;
2305 if (INTEL_INFO(dev)->gen <= 6 && r->spr_val) {
2306 WARN_ON(wm_lp != 1);
2307 results->wm_lp_spr[wm_lp - 1] = WM1S_LP_EN | r->spr_val;
2309 results->wm_lp_spr[wm_lp - 1] = r->spr_val;
2312 /* LP0 register values */
2313 list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
2314 enum pipe pipe = intel_crtc->pipe;
2315 const struct intel_wm_level *r =
2316 &intel_crtc->wm.active.wm[0];
2318 if (WARN_ON(!r->enable))
2321 results->wm_linetime[pipe] = intel_crtc->wm.active.linetime;
2323 results->wm_pipe[pipe] =
2324 (r->pri_val << WM0_PIPE_PLANE_SHIFT) |
2325 (r->spr_val << WM0_PIPE_SPRITE_SHIFT) |
2330 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2331 * case both are at the same level. Prefer r1 in case they're the same. */
2332 static struct intel_pipe_wm *ilk_find_best_result(struct drm_device *dev,
2333 struct intel_pipe_wm *r1,
2334 struct intel_pipe_wm *r2)
2336 int level, max_level = ilk_wm_max_level(dev);
2337 int level1 = 0, level2 = 0;
2339 for (level = 1; level <= max_level; level++) {
2340 if (r1->wm[level].enable)
2342 if (r2->wm[level].enable)
2346 if (level1 == level2) {
2347 if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled)
2351 } else if (level1 > level2) {
2358 /* dirty bits used to track which watermarks need changes */
2359 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2360 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2361 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2362 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2363 #define WM_DIRTY_FBC (1 << 24)
2364 #define WM_DIRTY_DDB (1 << 25)
2366 static unsigned int ilk_compute_wm_dirty(struct drm_device *dev,
2367 const struct ilk_wm_values *old,
2368 const struct ilk_wm_values *new)
2370 unsigned int dirty = 0;
2374 for_each_pipe(pipe) {
2375 if (old->wm_linetime[pipe] != new->wm_linetime[pipe]) {
2376 dirty |= WM_DIRTY_LINETIME(pipe);
2377 /* Must disable LP1+ watermarks too */
2378 dirty |= WM_DIRTY_LP_ALL;
2381 if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) {
2382 dirty |= WM_DIRTY_PIPE(pipe);
2383 /* Must disable LP1+ watermarks too */
2384 dirty |= WM_DIRTY_LP_ALL;
2388 if (old->enable_fbc_wm != new->enable_fbc_wm) {
2389 dirty |= WM_DIRTY_FBC;
2390 /* Must disable LP1+ watermarks too */
2391 dirty |= WM_DIRTY_LP_ALL;
2394 if (old->partitioning != new->partitioning) {
2395 dirty |= WM_DIRTY_DDB;
2396 /* Must disable LP1+ watermarks too */
2397 dirty |= WM_DIRTY_LP_ALL;
2400 /* LP1+ watermarks already deemed dirty, no need to continue */
2401 if (dirty & WM_DIRTY_LP_ALL)
2404 /* Find the lowest numbered LP1+ watermark in need of an update... */
2405 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2406 if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] ||
2407 old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1])
2411 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2412 for (; wm_lp <= 3; wm_lp++)
2413 dirty |= WM_DIRTY_LP(wm_lp);
2418 static bool _ilk_disable_lp_wm(struct drm_i915_private *dev_priv,
2421 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2422 bool changed = false;
2424 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] & WM1_LP_SR_EN) {
2425 previous->wm_lp[2] &= ~WM1_LP_SR_EN;
2426 I915_WRITE(WM3_LP_ILK, previous->wm_lp[2]);
2429 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] & WM1_LP_SR_EN) {
2430 previous->wm_lp[1] &= ~WM1_LP_SR_EN;
2431 I915_WRITE(WM2_LP_ILK, previous->wm_lp[1]);
2434 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] & WM1_LP_SR_EN) {
2435 previous->wm_lp[0] &= ~WM1_LP_SR_EN;
2436 I915_WRITE(WM1_LP_ILK, previous->wm_lp[0]);
2441 * Don't touch WM1S_LP_EN here.
2442 * Doing so could cause underruns.
2449 * The spec says we shouldn't write when we don't need, because every write
2450 * causes WMs to be re-evaluated, expending some power.
2452 static void ilk_write_wm_values(struct drm_i915_private *dev_priv,
2453 struct ilk_wm_values *results)
2455 struct drm_device *dev = dev_priv->dev;
2456 struct ilk_wm_values *previous = &dev_priv->wm.hw;
2460 dirty = ilk_compute_wm_dirty(dev, previous, results);
2464 _ilk_disable_lp_wm(dev_priv, dirty);
2466 if (dirty & WM_DIRTY_PIPE(PIPE_A))
2467 I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]);
2468 if (dirty & WM_DIRTY_PIPE(PIPE_B))
2469 I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]);
2470 if (dirty & WM_DIRTY_PIPE(PIPE_C))
2471 I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]);
2473 if (dirty & WM_DIRTY_LINETIME(PIPE_A))
2474 I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]);
2475 if (dirty & WM_DIRTY_LINETIME(PIPE_B))
2476 I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]);
2477 if (dirty & WM_DIRTY_LINETIME(PIPE_C))
2478 I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]);
2480 if (dirty & WM_DIRTY_DDB) {
2481 if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
2482 val = I915_READ(WM_MISC);
2483 if (results->partitioning == INTEL_DDB_PART_1_2)
2484 val &= ~WM_MISC_DATA_PARTITION_5_6;
2486 val |= WM_MISC_DATA_PARTITION_5_6;
2487 I915_WRITE(WM_MISC, val);
2489 val = I915_READ(DISP_ARB_CTL2);
2490 if (results->partitioning == INTEL_DDB_PART_1_2)
2491 val &= ~DISP_DATA_PARTITION_5_6;
2493 val |= DISP_DATA_PARTITION_5_6;
2494 I915_WRITE(DISP_ARB_CTL2, val);
2498 if (dirty & WM_DIRTY_FBC) {
2499 val = I915_READ(DISP_ARB_CTL);
2500 if (results->enable_fbc_wm)
2501 val &= ~DISP_FBC_WM_DIS;
2503 val |= DISP_FBC_WM_DIS;
2504 I915_WRITE(DISP_ARB_CTL, val);
2507 if (dirty & WM_DIRTY_LP(1) &&
2508 previous->wm_lp_spr[0] != results->wm_lp_spr[0])
2509 I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]);
2511 if (INTEL_INFO(dev)->gen >= 7) {
2512 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1])
2513 I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]);
2514 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2])
2515 I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]);
2518 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != results->wm_lp[0])
2519 I915_WRITE(WM1_LP_ILK, results->wm_lp[0]);
2520 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != results->wm_lp[1])
2521 I915_WRITE(WM2_LP_ILK, results->wm_lp[1]);
2522 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != results->wm_lp[2])
2523 I915_WRITE(WM3_LP_ILK, results->wm_lp[2]);
2525 dev_priv->wm.hw = *results;
2528 static bool ilk_disable_lp_wm(struct drm_device *dev)
2530 struct drm_i915_private *dev_priv = dev->dev_private;
2532 return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL);
2535 static void ilk_update_wm(struct drm_crtc *crtc)
2537 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2538 struct drm_device *dev = crtc->dev;
2539 struct drm_i915_private *dev_priv = dev->dev_private;
2540 struct ilk_wm_maximums max;
2541 struct ilk_pipe_wm_parameters params = {};
2542 struct ilk_wm_values results = {};
2543 enum intel_ddb_partitioning partitioning;
2544 struct intel_pipe_wm pipe_wm = {};
2545 struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
2546 struct intel_wm_config config = {};
2548 ilk_compute_wm_parameters(crtc, ¶ms, &config);
2550 intel_compute_pipe_wm(crtc, ¶ms, &pipe_wm);
2552 if (!memcmp(&intel_crtc->wm.active, &pipe_wm, sizeof(pipe_wm)))
2555 intel_crtc->wm.active = pipe_wm;
2557 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_1_2, &max);
2558 ilk_wm_merge(dev, &config, &max, &lp_wm_1_2);
2560 /* 5/6 split only in single pipe config on IVB+ */
2561 if (INTEL_INFO(dev)->gen >= 7 &&
2562 config.num_pipes_active == 1 && config.sprites_enabled) {
2563 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
2564 ilk_wm_merge(dev, &config, &max, &lp_wm_5_6);
2566 best_lp_wm = ilk_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6);
2568 best_lp_wm = &lp_wm_1_2;
2571 partitioning = (best_lp_wm == &lp_wm_1_2) ?
2572 INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
2574 ilk_compute_wm_results(dev, best_lp_wm, partitioning, &results);
2576 ilk_write_wm_values(dev_priv, &results);
2579 static void ilk_update_sprite_wm(struct drm_plane *plane,
2580 struct drm_crtc *crtc,
2581 uint32_t sprite_width, int pixel_size,
2582 bool enabled, bool scaled)
2584 struct drm_device *dev = plane->dev;
2585 struct intel_plane *intel_plane = to_intel_plane(plane);
2587 intel_plane->wm.enabled = enabled;
2588 intel_plane->wm.scaled = scaled;
2589 intel_plane->wm.horiz_pixels = sprite_width;
2590 intel_plane->wm.bytes_per_pixel = pixel_size;
2593 * IVB workaround: must disable low power watermarks for at least
2594 * one frame before enabling scaling. LP watermarks can be re-enabled
2595 * when scaling is disabled.
2597 * WaCxSRDisabledForSpriteScaling:ivb
2599 if (IS_IVYBRIDGE(dev) && scaled && ilk_disable_lp_wm(dev))
2600 intel_wait_for_vblank(dev, intel_plane->pipe);
2602 ilk_update_wm(crtc);
2605 static void ilk_pipe_wm_get_hw_state(struct drm_crtc *crtc)
2607 struct drm_device *dev = crtc->dev;
2608 struct drm_i915_private *dev_priv = dev->dev_private;
2609 struct ilk_wm_values *hw = &dev_priv->wm.hw;
2610 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2611 struct intel_pipe_wm *active = &intel_crtc->wm.active;
2612 enum pipe pipe = intel_crtc->pipe;
2613 static const unsigned int wm0_pipe_reg[] = {
2614 [PIPE_A] = WM0_PIPEA_ILK,
2615 [PIPE_B] = WM0_PIPEB_ILK,
2616 [PIPE_C] = WM0_PIPEC_IVB,
2619 hw->wm_pipe[pipe] = I915_READ(wm0_pipe_reg[pipe]);
2620 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2621 hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe));
2623 if (intel_crtc_active(crtc)) {
2624 u32 tmp = hw->wm_pipe[pipe];
2627 * For active pipes LP0 watermark is marked as
2628 * enabled, and LP1+ watermaks as disabled since
2629 * we can't really reverse compute them in case
2630 * multiple pipes are active.
2632 active->wm[0].enable = true;
2633 active->wm[0].pri_val = (tmp & WM0_PIPE_PLANE_MASK) >> WM0_PIPE_PLANE_SHIFT;
2634 active->wm[0].spr_val = (tmp & WM0_PIPE_SPRITE_MASK) >> WM0_PIPE_SPRITE_SHIFT;
2635 active->wm[0].cur_val = tmp & WM0_PIPE_CURSOR_MASK;
2636 active->linetime = hw->wm_linetime[pipe];
2638 int level, max_level = ilk_wm_max_level(dev);
2641 * For inactive pipes, all watermark levels
2642 * should be marked as enabled but zeroed,
2643 * which is what we'd compute them to.
2645 for (level = 0; level <= max_level; level++)
2646 active->wm[level].enable = true;
2650 void ilk_wm_get_hw_state(struct drm_device *dev)
2652 struct drm_i915_private *dev_priv = dev->dev_private;
2653 struct ilk_wm_values *hw = &dev_priv->wm.hw;
2654 struct drm_crtc *crtc;
2656 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
2657 ilk_pipe_wm_get_hw_state(crtc);
2659 hw->wm_lp[0] = I915_READ(WM1_LP_ILK);
2660 hw->wm_lp[1] = I915_READ(WM2_LP_ILK);
2661 hw->wm_lp[2] = I915_READ(WM3_LP_ILK);
2663 hw->wm_lp_spr[0] = I915_READ(WM1S_LP_ILK);
2664 hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
2665 hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
2667 if (IS_HASWELL(dev) || IS_BROADWELL(dev))
2668 hw->partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ?
2669 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
2670 else if (IS_IVYBRIDGE(dev))
2671 hw->partitioning = (I915_READ(DISP_ARB_CTL2) & DISP_DATA_PARTITION_5_6) ?
2672 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
2675 !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS);
2679 * intel_update_watermarks - update FIFO watermark values based on current modes
2681 * Calculate watermark values for the various WM regs based on current mode
2682 * and plane configuration.
2684 * There are several cases to deal with here:
2685 * - normal (i.e. non-self-refresh)
2686 * - self-refresh (SR) mode
2687 * - lines are large relative to FIFO size (buffer can hold up to 2)
2688 * - lines are small relative to FIFO size (buffer can hold more than 2
2689 * lines), so need to account for TLB latency
2691 * The normal calculation is:
2692 * watermark = dotclock * bytes per pixel * latency
2693 * where latency is platform & configuration dependent (we assume pessimal
2696 * The SR calculation is:
2697 * watermark = (trunc(latency/line time)+1) * surface width *
2700 * line time = htotal / dotclock
2701 * surface width = hdisplay for normal plane and 64 for cursor
2702 * and latency is assumed to be high, as above.
2704 * The final value programmed to the register should always be rounded up,
2705 * and include an extra 2 entries to account for clock crossings.
2707 * We don't use the sprite, so we can ignore that. And on Crestline we have
2708 * to set the non-SR watermarks to 8.
2710 void intel_update_watermarks(struct drm_crtc *crtc)
2712 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
2714 if (dev_priv->display.update_wm)
2715 dev_priv->display.update_wm(crtc);
2718 void intel_update_sprite_watermarks(struct drm_plane *plane,
2719 struct drm_crtc *crtc,
2720 uint32_t sprite_width, int pixel_size,
2721 bool enabled, bool scaled)
2723 struct drm_i915_private *dev_priv = plane->dev->dev_private;
2725 if (dev_priv->display.update_sprite_wm)
2726 dev_priv->display.update_sprite_wm(plane, crtc, sprite_width,
2727 pixel_size, enabled, scaled);
2730 static struct drm_i915_gem_object *
2731 intel_alloc_context_page(struct drm_device *dev)
2733 struct drm_i915_gem_object *ctx;
2736 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
2738 ctx = i915_gem_alloc_object(dev, 4096);
2740 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
2744 ret = i915_gem_obj_ggtt_pin(ctx, 4096, true, false);
2746 DRM_ERROR("failed to pin power context: %d\n", ret);
2750 ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
2752 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
2759 i915_gem_object_ggtt_unpin(ctx);
2761 drm_gem_object_unreference(&ctx->base);
2766 * Lock protecting IPS related data structures
2768 DEFINE_SPINLOCK(mchdev_lock);
2770 /* Global for IPS driver to get at the current i915 device. Protected by
2772 static struct drm_i915_private *i915_mch_dev;
2774 bool ironlake_set_drps(struct drm_device *dev, u8 val)
2776 struct drm_i915_private *dev_priv = dev->dev_private;
2779 assert_spin_locked(&mchdev_lock);
2781 rgvswctl = I915_READ16(MEMSWCTL);
2782 if (rgvswctl & MEMCTL_CMD_STS) {
2783 DRM_DEBUG("gpu busy, RCS change rejected\n");
2784 return false; /* still busy with another command */
2787 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
2788 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
2789 I915_WRITE16(MEMSWCTL, rgvswctl);
2790 POSTING_READ16(MEMSWCTL);
2792 rgvswctl |= MEMCTL_CMD_STS;
2793 I915_WRITE16(MEMSWCTL, rgvswctl);
2798 static void ironlake_enable_drps(struct drm_device *dev)
2800 struct drm_i915_private *dev_priv = dev->dev_private;
2801 u32 rgvmodectl = I915_READ(MEMMODECTL);
2802 u8 fmax, fmin, fstart, vstart;
2804 spin_lock_irq(&mchdev_lock);
2806 /* Enable temp reporting */
2807 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
2808 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
2810 /* 100ms RC evaluation intervals */
2811 I915_WRITE(RCUPEI, 100000);
2812 I915_WRITE(RCDNEI, 100000);
2814 /* Set max/min thresholds to 90ms and 80ms respectively */
2815 I915_WRITE(RCBMAXAVG, 90000);
2816 I915_WRITE(RCBMINAVG, 80000);
2818 I915_WRITE(MEMIHYST, 1);
2820 /* Set up min, max, and cur for interrupt handling */
2821 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
2822 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
2823 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
2824 MEMMODE_FSTART_SHIFT;
2826 vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
2829 dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
2830 dev_priv->ips.fstart = fstart;
2832 dev_priv->ips.max_delay = fstart;
2833 dev_priv->ips.min_delay = fmin;
2834 dev_priv->ips.cur_delay = fstart;
2836 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
2837 fmax, fmin, fstart);
2839 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
2842 * Interrupts will be enabled in ironlake_irq_postinstall
2845 I915_WRITE(VIDSTART, vstart);
2846 POSTING_READ(VIDSTART);
2848 rgvmodectl |= MEMMODE_SWMODE_EN;
2849 I915_WRITE(MEMMODECTL, rgvmodectl);
2851 if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
2852 DRM_ERROR("stuck trying to change perf mode\n");
2855 ironlake_set_drps(dev, fstart);
2857 dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
2859 dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
2860 dev_priv->ips.last_count2 = I915_READ(0x112f4);
2861 getrawmonotonic(&dev_priv->ips.last_time2);
2863 spin_unlock_irq(&mchdev_lock);
2866 static void ironlake_disable_drps(struct drm_device *dev)
2868 struct drm_i915_private *dev_priv = dev->dev_private;
2871 spin_lock_irq(&mchdev_lock);
2873 rgvswctl = I915_READ16(MEMSWCTL);
2875 /* Ack interrupts, disable EFC interrupt */
2876 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
2877 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
2878 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
2879 I915_WRITE(DEIIR, DE_PCU_EVENT);
2880 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
2882 /* Go back to the starting frequency */
2883 ironlake_set_drps(dev, dev_priv->ips.fstart);
2885 rgvswctl |= MEMCTL_CMD_STS;
2886 I915_WRITE(MEMSWCTL, rgvswctl);
2889 spin_unlock_irq(&mchdev_lock);
2892 /* There's a funny hw issue where the hw returns all 0 when reading from
2893 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
2894 * ourselves, instead of doing a rmw cycle (which might result in us clearing
2895 * all limits and the gpu stuck at whatever frequency it is at atm).
2897 static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 val)
2901 /* Only set the down limit when we've reached the lowest level to avoid
2902 * getting more interrupts, otherwise leave this clear. This prevents a
2903 * race in the hw when coming out of rc6: There's a tiny window where
2904 * the hw runs at the minimal clock before selecting the desired
2905 * frequency, if the down threshold expires in that window we will not
2906 * receive a down interrupt. */
2907 limits = dev_priv->rps.max_delay << 24;
2908 if (val <= dev_priv->rps.min_delay)
2909 limits |= dev_priv->rps.min_delay << 16;
2914 static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
2918 new_power = dev_priv->rps.power;
2919 switch (dev_priv->rps.power) {
2921 if (val > dev_priv->rps.rpe_delay + 1 && val > dev_priv->rps.cur_delay)
2922 new_power = BETWEEN;
2926 if (val <= dev_priv->rps.rpe_delay && val < dev_priv->rps.cur_delay)
2927 new_power = LOW_POWER;
2928 else if (val >= dev_priv->rps.rp0_delay && val > dev_priv->rps.cur_delay)
2929 new_power = HIGH_POWER;
2933 if (val < (dev_priv->rps.rp1_delay + dev_priv->rps.rp0_delay) >> 1 && val < dev_priv->rps.cur_delay)
2934 new_power = BETWEEN;
2937 /* Max/min bins are special */
2938 if (val == dev_priv->rps.min_delay)
2939 new_power = LOW_POWER;
2940 if (val == dev_priv->rps.max_delay)
2941 new_power = HIGH_POWER;
2942 if (new_power == dev_priv->rps.power)
2945 /* Note the units here are not exactly 1us, but 1280ns. */
2946 switch (new_power) {
2948 /* Upclock if more than 95% busy over 16ms */
2949 I915_WRITE(GEN6_RP_UP_EI, 12500);
2950 I915_WRITE(GEN6_RP_UP_THRESHOLD, 11800);
2952 /* Downclock if less than 85% busy over 32ms */
2953 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
2954 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 21250);
2956 I915_WRITE(GEN6_RP_CONTROL,
2957 GEN6_RP_MEDIA_TURBO |
2958 GEN6_RP_MEDIA_HW_NORMAL_MODE |
2959 GEN6_RP_MEDIA_IS_GFX |
2961 GEN6_RP_UP_BUSY_AVG |
2962 GEN6_RP_DOWN_IDLE_AVG);
2966 /* Upclock if more than 90% busy over 13ms */
2967 I915_WRITE(GEN6_RP_UP_EI, 10250);
2968 I915_WRITE(GEN6_RP_UP_THRESHOLD, 9225);
2970 /* Downclock if less than 75% busy over 32ms */
2971 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
2972 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 18750);
2974 I915_WRITE(GEN6_RP_CONTROL,
2975 GEN6_RP_MEDIA_TURBO |
2976 GEN6_RP_MEDIA_HW_NORMAL_MODE |
2977 GEN6_RP_MEDIA_IS_GFX |
2979 GEN6_RP_UP_BUSY_AVG |
2980 GEN6_RP_DOWN_IDLE_AVG);
2984 /* Upclock if more than 85% busy over 10ms */
2985 I915_WRITE(GEN6_RP_UP_EI, 8000);
2986 I915_WRITE(GEN6_RP_UP_THRESHOLD, 6800);
2988 /* Downclock if less than 60% busy over 32ms */
2989 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
2990 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 15000);
2992 I915_WRITE(GEN6_RP_CONTROL,
2993 GEN6_RP_MEDIA_TURBO |
2994 GEN6_RP_MEDIA_HW_NORMAL_MODE |
2995 GEN6_RP_MEDIA_IS_GFX |
2997 GEN6_RP_UP_BUSY_AVG |
2998 GEN6_RP_DOWN_IDLE_AVG);
3002 dev_priv->rps.power = new_power;
3003 dev_priv->rps.last_adj = 0;
3006 /* gen6_set_rps is called to update the frequency request, but should also be
3007 * called when the range (min_delay and max_delay) is modified so that we can
3008 * update the GEN6_RP_INTERRUPT_LIMITS register accordingly. */
3009 void gen6_set_rps(struct drm_device *dev, u8 val)
3011 struct drm_i915_private *dev_priv = dev->dev_private;
3013 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3014 WARN_ON(val > dev_priv->rps.max_delay);
3015 WARN_ON(val < dev_priv->rps.min_delay);
3017 if (val == dev_priv->rps.cur_delay) {
3018 /* min/max delay may still have been modified so be sure to
3019 * write the limits value */
3020 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3021 gen6_rps_limits(dev_priv, val));
3026 gen6_set_rps_thresholds(dev_priv, val);
3028 if (IS_HASWELL(dev))
3029 I915_WRITE(GEN6_RPNSWREQ,
3030 HSW_FREQUENCY(val));
3032 I915_WRITE(GEN6_RPNSWREQ,
3033 GEN6_FREQUENCY(val) |
3035 GEN6_AGGRESSIVE_TURBO);
3037 /* Make sure we continue to get interrupts
3038 * until we hit the minimum or maximum frequencies.
3040 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3041 gen6_rps_limits(dev_priv, val));
3043 POSTING_READ(GEN6_RPNSWREQ);
3045 dev_priv->rps.cur_delay = val;
3047 trace_intel_gpu_freq_change(val * 50);
3050 /* vlv_set_rps_idle: Set the frequency to Rpn if Gfx clocks are down
3052 * * If Gfx is Idle, then
3053 * 1. Mask Turbo interrupts
3054 * 2. Bring up Gfx clock
3055 * 3. Change the freq to Rpn and wait till P-Unit updates freq
3056 * 4. Clear the Force GFX CLK ON bit so that Gfx can down
3057 * 5. Unmask Turbo interrupts
3059 static void vlv_set_rps_idle(struct drm_i915_private *dev_priv)
3062 * When we are idle. Drop to min voltage state.
3065 if (dev_priv->rps.cur_delay <= dev_priv->rps.min_delay)
3068 /* Mask turbo interrupt so that they will not come in between */
3069 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
3071 /* Bring up the Gfx clock */
3072 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG,
3073 I915_READ(VLV_GTLC_SURVIVABILITY_REG) |
3074 VLV_GFX_CLK_FORCE_ON_BIT);
3076 if (wait_for(((VLV_GFX_CLK_STATUS_BIT &
3077 I915_READ(VLV_GTLC_SURVIVABILITY_REG)) != 0), 5)) {
3078 DRM_ERROR("GFX_CLK_ON request timed out\n");
3082 dev_priv->rps.cur_delay = dev_priv->rps.min_delay;
3084 vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ,
3085 dev_priv->rps.min_delay);
3087 if (wait_for(((vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS))
3088 & GENFREQSTATUS) == 0, 5))
3089 DRM_ERROR("timed out waiting for Punit\n");
3091 /* Release the Gfx clock */
3092 I915_WRITE(VLV_GTLC_SURVIVABILITY_REG,
3093 I915_READ(VLV_GTLC_SURVIVABILITY_REG) &
3094 ~VLV_GFX_CLK_FORCE_ON_BIT);
3096 /* Unmask Up interrupts */
3097 dev_priv->rps.rp_up_masked = true;
3098 gen6_set_pm_mask(dev_priv, GEN6_PM_RP_DOWN_THRESHOLD,
3099 dev_priv->rps.min_delay);
3102 void gen6_rps_idle(struct drm_i915_private *dev_priv)
3104 struct drm_device *dev = dev_priv->dev;
3106 mutex_lock(&dev_priv->rps.hw_lock);
3107 if (dev_priv->rps.enabled) {
3108 if (IS_VALLEYVIEW(dev))
3109 vlv_set_rps_idle(dev_priv);
3111 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3112 dev_priv->rps.last_adj = 0;
3114 mutex_unlock(&dev_priv->rps.hw_lock);
3117 void gen6_rps_boost(struct drm_i915_private *dev_priv)
3119 struct drm_device *dev = dev_priv->dev;
3121 mutex_lock(&dev_priv->rps.hw_lock);
3122 if (dev_priv->rps.enabled) {
3123 if (IS_VALLEYVIEW(dev))
3124 valleyview_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
3126 gen6_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
3127 dev_priv->rps.last_adj = 0;
3129 mutex_unlock(&dev_priv->rps.hw_lock);
3132 void valleyview_set_rps(struct drm_device *dev, u8 val)
3134 struct drm_i915_private *dev_priv = dev->dev_private;
3136 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3137 WARN_ON(val > dev_priv->rps.max_delay);
3138 WARN_ON(val < dev_priv->rps.min_delay);
3140 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3141 vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay),
3142 dev_priv->rps.cur_delay,
3143 vlv_gpu_freq(dev_priv, val), val);
3145 if (val == dev_priv->rps.cur_delay)
3148 vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
3150 dev_priv->rps.cur_delay = val;
3152 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv, val));
3155 static void gen6_disable_rps_interrupts(struct drm_device *dev)
3157 struct drm_i915_private *dev_priv = dev->dev_private;
3159 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
3160 I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) & ~GEN6_PM_RPS_EVENTS);
3161 /* Complete PM interrupt masking here doesn't race with the rps work
3162 * item again unmasking PM interrupts because that is using a different
3163 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3164 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3166 spin_lock_irq(&dev_priv->irq_lock);
3167 dev_priv->rps.pm_iir = 0;
3168 spin_unlock_irq(&dev_priv->irq_lock);
3170 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3173 static void gen6_disable_rps(struct drm_device *dev)
3175 struct drm_i915_private *dev_priv = dev->dev_private;
3177 I915_WRITE(GEN6_RC_CONTROL, 0);
3178 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
3180 gen6_disable_rps_interrupts(dev);
3183 static void valleyview_disable_rps(struct drm_device *dev)
3185 struct drm_i915_private *dev_priv = dev->dev_private;
3187 I915_WRITE(GEN6_RC_CONTROL, 0);
3189 gen6_disable_rps_interrupts(dev);
3191 if (dev_priv->vlv_pctx) {
3192 drm_gem_object_unreference(&dev_priv->vlv_pctx->base);
3193 dev_priv->vlv_pctx = NULL;
3197 static void intel_print_rc6_info(struct drm_device *dev, u32 mode)
3200 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
3202 if (IS_HASWELL(dev))
3203 DRM_DEBUG_DRIVER("Haswell: only RC6 available\n");
3205 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3206 (mode & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off",
3207 (mode & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off",
3208 (mode & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off");
3211 int intel_enable_rc6(const struct drm_device *dev)
3213 /* No RC6 before Ironlake */
3214 if (INTEL_INFO(dev)->gen < 5)
3217 /* Respect the kernel parameter if it is set */
3218 if (i915.enable_rc6 >= 0)
3219 return i915.enable_rc6;
3221 /* Disable RC6 on Ironlake */
3222 if (INTEL_INFO(dev)->gen == 5)
3225 if (IS_IVYBRIDGE(dev) || IS_VALLEYVIEW(dev))
3226 return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE);
3228 return INTEL_RC6_ENABLE;
3231 static void gen6_enable_rps_interrupts(struct drm_device *dev)
3233 struct drm_i915_private *dev_priv = dev->dev_private;
3236 spin_lock_irq(&dev_priv->irq_lock);
3237 WARN_ON(dev_priv->rps.pm_iir);
3238 snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS);
3239 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3240 spin_unlock_irq(&dev_priv->irq_lock);
3242 /* only unmask PM interrupts we need. Mask all others. */
3243 enabled_intrs = GEN6_PM_RPS_EVENTS;
3245 /* IVB and SNB hard hangs on looping batchbuffer
3246 * if GEN6_PM_UP_EI_EXPIRED is masked.
3248 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
3249 enabled_intrs |= GEN6_PM_RP_UP_EI_EXPIRED;
3251 I915_WRITE(GEN6_PMINTRMSK, ~enabled_intrs);
3254 static void gen8_enable_rps(struct drm_device *dev)
3256 struct drm_i915_private *dev_priv = dev->dev_private;
3257 struct intel_ring_buffer *ring;
3258 uint32_t rc6_mask = 0, rp_state_cap;
3261 /* 1a: Software RC state - RC0 */
3262 I915_WRITE(GEN6_RC_STATE, 0);
3264 /* 1c & 1d: Get forcewake during program sequence. Although the driver
3265 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
3266 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3268 /* 2a: Disable RC states. */
3269 I915_WRITE(GEN6_RC_CONTROL, 0);
3271 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3273 /* 2b: Program RC6 thresholds.*/
3274 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
3275 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
3276 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
3277 for_each_ring(ring, dev_priv, unused)
3278 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3279 I915_WRITE(GEN6_RC_SLEEP, 0);
3280 I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */
3283 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
3284 rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
3285 DRM_INFO("RC6 %s\n", (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off");
3286 I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
3287 GEN6_RC_CTL_EI_MODE(1) |
3290 /* 4 Program defaults and thresholds for RPS*/
3291 I915_WRITE(GEN6_RPNSWREQ, HSW_FREQUENCY(10)); /* Request 500 MHz */
3292 I915_WRITE(GEN6_RC_VIDEO_FREQ, HSW_FREQUENCY(12)); /* Request 600 MHz */
3293 /* NB: Docs say 1s, and 1000000 - which aren't equivalent */
3294 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */
3296 /* Docs recommend 900MHz, and 300 MHz respectively */
3297 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3298 dev_priv->rps.max_delay << 24 |
3299 dev_priv->rps.min_delay << 16);
3301 I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */
3302 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/
3303 I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */
3304 I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */
3306 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3309 I915_WRITE(GEN6_RP_CONTROL,
3310 GEN6_RP_MEDIA_TURBO |
3311 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3312 GEN6_RP_MEDIA_IS_GFX |
3314 GEN6_RP_UP_BUSY_AVG |
3315 GEN6_RP_DOWN_IDLE_AVG);
3317 /* 6: Ring frequency + overclocking (our driver does this later */
3319 gen6_set_rps(dev, (I915_READ(GEN6_GT_PERF_STATUS) & 0xff00) >> 8);
3321 gen6_enable_rps_interrupts(dev);
3323 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3326 static void gen6_enable_rps(struct drm_device *dev)
3328 struct drm_i915_private *dev_priv = dev->dev_private;
3329 struct intel_ring_buffer *ring;
3330 u32 rp_state_cap, hw_max, hw_min;
3332 u32 rc6vids, pcu_mbox, rc6_mask = 0;
3337 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3339 /* Here begins a magic sequence of register writes to enable
3340 * auto-downclocking.
3342 * Perhaps there might be some value in exposing these to
3345 I915_WRITE(GEN6_RC_STATE, 0);
3347 /* Clear the DBG now so we don't confuse earlier errors */
3348 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3349 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
3350 I915_WRITE(GTFIFODBG, gtfifodbg);
3353 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3355 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3356 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
3358 /* In units of 50MHz */
3359 dev_priv->rps.hw_max = hw_max = rp_state_cap & 0xff;
3360 hw_min = (rp_state_cap >> 16) & 0xff;
3361 dev_priv->rps.rp1_delay = (rp_state_cap >> 8) & 0xff;
3362 dev_priv->rps.rp0_delay = (rp_state_cap >> 0) & 0xff;
3363 dev_priv->rps.rpe_delay = dev_priv->rps.rp1_delay;
3364 dev_priv->rps.cur_delay = 0;
3366 /* Preserve min/max settings in case of re-init */
3367 if (dev_priv->rps.max_delay == 0)
3368 dev_priv->rps.max_delay = hw_max;
3370 if (dev_priv->rps.min_delay == 0)
3371 dev_priv->rps.min_delay = hw_min;
3373 /* disable the counters and set deterministic thresholds */
3374 I915_WRITE(GEN6_RC_CONTROL, 0);
3376 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
3377 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
3378 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
3379 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3380 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3382 for_each_ring(ring, dev_priv, i)
3383 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3385 I915_WRITE(GEN6_RC_SLEEP, 0);
3386 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
3387 if (IS_IVYBRIDGE(dev))
3388 I915_WRITE(GEN6_RC6_THRESHOLD, 125000);
3390 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
3391 I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
3392 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
3394 /* Check if we are enabling RC6 */
3395 rc6_mode = intel_enable_rc6(dev_priv->dev);
3396 if (rc6_mode & INTEL_RC6_ENABLE)
3397 rc6_mask |= GEN6_RC_CTL_RC6_ENABLE;
3399 /* We don't use those on Haswell */
3400 if (!IS_HASWELL(dev)) {
3401 if (rc6_mode & INTEL_RC6p_ENABLE)
3402 rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
3404 if (rc6_mode & INTEL_RC6pp_ENABLE)
3405 rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
3408 intel_print_rc6_info(dev, rc6_mask);
3410 I915_WRITE(GEN6_RC_CONTROL,
3412 GEN6_RC_CTL_EI_MODE(1) |
3413 GEN6_RC_CTL_HW_ENABLE);
3415 /* Power down if completely idle for over 50ms */
3416 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
3417 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3419 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
3422 ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
3423 if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */
3424 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3425 (dev_priv->rps.max_delay & 0xff) * 50,
3426 (pcu_mbox & 0xff) * 50);
3427 dev_priv->rps.hw_max = pcu_mbox & 0xff;
3430 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3433 dev_priv->rps.power = HIGH_POWER; /* force a reset */
3434 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3436 gen6_enable_rps_interrupts(dev);
3439 ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
3440 if (IS_GEN6(dev) && ret) {
3441 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3442 } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
3443 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3444 GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
3445 rc6vids &= 0xffff00;
3446 rc6vids |= GEN6_ENCODE_RC6_VID(450);
3447 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
3449 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3452 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3455 void gen6_update_ring_freq(struct drm_device *dev)
3457 struct drm_i915_private *dev_priv = dev->dev_private;
3459 unsigned int gpu_freq;
3460 unsigned int max_ia_freq, min_ring_freq;
3461 int scaling_factor = 180;
3462 struct cpufreq_policy *policy;
3464 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3466 policy = cpufreq_cpu_get(0);
3468 max_ia_freq = policy->cpuinfo.max_freq;
3469 cpufreq_cpu_put(policy);
3472 * Default to measured freq if none found, PCU will ensure we
3475 max_ia_freq = tsc_khz;
3478 /* Convert from kHz to MHz */
3479 max_ia_freq /= 1000;
3481 min_ring_freq = I915_READ(DCLK) & 0xf;
3482 /* convert DDR frequency from units of 266.6MHz to bandwidth */
3483 min_ring_freq = mult_frac(min_ring_freq, 8, 3);
3486 * For each potential GPU frequency, load a ring frequency we'd like
3487 * to use for memory access. We do this by specifying the IA frequency
3488 * the PCU should use as a reference to determine the ring frequency.
3490 for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay;
3492 int diff = dev_priv->rps.max_delay - gpu_freq;
3493 unsigned int ia_freq = 0, ring_freq = 0;
3495 if (INTEL_INFO(dev)->gen >= 8) {
3496 /* max(2 * GT, DDR). NB: GT is 50MHz units */
3497 ring_freq = max(min_ring_freq, gpu_freq);
3498 } else if (IS_HASWELL(dev)) {
3499 ring_freq = mult_frac(gpu_freq, 5, 4);
3500 ring_freq = max(min_ring_freq, ring_freq);
3501 /* leave ia_freq as the default, chosen by cpufreq */
3503 /* On older processors, there is no separate ring
3504 * clock domain, so in order to boost the bandwidth
3505 * of the ring, we need to upclock the CPU (ia_freq).
3507 * For GPU frequencies less than 750MHz,
3508 * just use the lowest ring freq.
3510 if (gpu_freq < min_freq)
3513 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
3514 ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
3517 sandybridge_pcode_write(dev_priv,
3518 GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
3519 ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
3520 ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
3525 int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
3529 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
3531 rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
3533 rp0 = min_t(u32, rp0, 0xea);
3538 static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
3542 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
3543 rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
3544 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
3545 rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
3550 int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
3552 return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
3555 static void valleyview_setup_pctx(struct drm_device *dev)
3557 struct drm_i915_private *dev_priv = dev->dev_private;
3558 struct drm_i915_gem_object *pctx;
3559 unsigned long pctx_paddr;
3561 int pctx_size = 24*1024;
3563 pcbr = I915_READ(VLV_PCBR);
3565 /* BIOS set it up already, grab the pre-alloc'd space */
3568 pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
3569 pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev,
3571 I915_GTT_OFFSET_NONE,
3577 * From the Gunit register HAS:
3578 * The Gfx driver is expected to program this register and ensure
3579 * proper allocation within Gfx stolen memory. For example, this
3580 * register should be programmed such than the PCBR range does not
3581 * overlap with other ranges, such as the frame buffer, protected
3582 * memory, or any other relevant ranges.
3584 pctx = i915_gem_object_create_stolen(dev, pctx_size);
3586 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
3590 pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
3591 I915_WRITE(VLV_PCBR, pctx_paddr);
3594 dev_priv->vlv_pctx = pctx;
3597 static void valleyview_enable_rps(struct drm_device *dev)
3599 struct drm_i915_private *dev_priv = dev->dev_private;
3600 struct intel_ring_buffer *ring;
3601 u32 gtfifodbg, val, hw_max, hw_min, rc6_mode = 0;
3604 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3606 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3607 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
3609 I915_WRITE(GTFIFODBG, gtfifodbg);
3612 valleyview_setup_pctx(dev);
3614 /* If VLV, Forcewake all wells, else re-direct to regular path */
3615 gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
3617 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
3618 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
3619 I915_WRITE(GEN6_RP_UP_EI, 66000);
3620 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
3622 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3624 I915_WRITE(GEN6_RP_CONTROL,
3625 GEN6_RP_MEDIA_TURBO |
3626 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3627 GEN6_RP_MEDIA_IS_GFX |
3629 GEN6_RP_UP_BUSY_AVG |
3630 GEN6_RP_DOWN_IDLE_CONT);
3632 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
3633 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3634 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3636 for_each_ring(ring, dev_priv, i)
3637 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3639 I915_WRITE(GEN6_RC6_THRESHOLD, 0x557);
3641 /* allows RC6 residency counter to work */
3642 I915_WRITE(VLV_COUNTER_CONTROL,
3643 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
3644 VLV_MEDIA_RC6_COUNT_EN |
3645 VLV_RENDER_RC6_COUNT_EN));
3646 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
3647 rc6_mode = GEN7_RC_CTL_TO_MODE | VLV_RC_CTL_CTX_RST_PARALLEL;
3649 intel_print_rc6_info(dev, rc6_mode);
3651 I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
3653 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
3655 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
3656 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
3658 dev_priv->rps.cur_delay = (val >> 8) & 0xff;
3659 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
3660 vlv_gpu_freq(dev_priv, dev_priv->rps.cur_delay),
3661 dev_priv->rps.cur_delay);
3663 dev_priv->rps.hw_max = hw_max = valleyview_rps_max_freq(dev_priv);
3664 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
3665 vlv_gpu_freq(dev_priv, hw_max),
3668 dev_priv->rps.rpe_delay = valleyview_rps_rpe_freq(dev_priv);
3669 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
3670 vlv_gpu_freq(dev_priv, dev_priv->rps.rpe_delay),
3671 dev_priv->rps.rpe_delay);
3673 hw_min = valleyview_rps_min_freq(dev_priv);
3674 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
3675 vlv_gpu_freq(dev_priv, hw_min),
3678 /* Preserve min/max settings in case of re-init */
3679 if (dev_priv->rps.max_delay == 0)
3680 dev_priv->rps.max_delay = hw_max;
3682 if (dev_priv->rps.min_delay == 0)
3683 dev_priv->rps.min_delay = hw_min;
3685 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
3686 vlv_gpu_freq(dev_priv, dev_priv->rps.rpe_delay),
3687 dev_priv->rps.rpe_delay);
3689 valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
3691 dev_priv->rps.rp_up_masked = false;
3692 dev_priv->rps.rp_down_masked = false;
3694 gen6_enable_rps_interrupts(dev);
3696 gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
3699 void ironlake_teardown_rc6(struct drm_device *dev)
3701 struct drm_i915_private *dev_priv = dev->dev_private;
3703 if (dev_priv->ips.renderctx) {
3704 i915_gem_object_ggtt_unpin(dev_priv->ips.renderctx);
3705 drm_gem_object_unreference(&dev_priv->ips.renderctx->base);
3706 dev_priv->ips.renderctx = NULL;
3709 if (dev_priv->ips.pwrctx) {
3710 i915_gem_object_ggtt_unpin(dev_priv->ips.pwrctx);
3711 drm_gem_object_unreference(&dev_priv->ips.pwrctx->base);
3712 dev_priv->ips.pwrctx = NULL;
3716 static void ironlake_disable_rc6(struct drm_device *dev)
3718 struct drm_i915_private *dev_priv = dev->dev_private;
3720 if (I915_READ(PWRCTXA)) {
3721 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
3722 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
3723 wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
3726 I915_WRITE(PWRCTXA, 0);
3727 POSTING_READ(PWRCTXA);
3729 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3730 POSTING_READ(RSTDBYCTL);
3734 static int ironlake_setup_rc6(struct drm_device *dev)
3736 struct drm_i915_private *dev_priv = dev->dev_private;
3738 if (dev_priv->ips.renderctx == NULL)
3739 dev_priv->ips.renderctx = intel_alloc_context_page(dev);
3740 if (!dev_priv->ips.renderctx)
3743 if (dev_priv->ips.pwrctx == NULL)
3744 dev_priv->ips.pwrctx = intel_alloc_context_page(dev);
3745 if (!dev_priv->ips.pwrctx) {
3746 ironlake_teardown_rc6(dev);
3753 static void ironlake_enable_rc6(struct drm_device *dev)
3755 struct drm_i915_private *dev_priv = dev->dev_private;
3756 struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
3757 bool was_interruptible;
3760 /* rc6 disabled by default due to repeated reports of hanging during
3763 if (!intel_enable_rc6(dev))
3766 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
3768 ret = ironlake_setup_rc6(dev);
3772 was_interruptible = dev_priv->mm.interruptible;
3773 dev_priv->mm.interruptible = false;
3776 * GPU can automatically power down the render unit if given a page
3779 ret = intel_ring_begin(ring, 6);
3781 ironlake_teardown_rc6(dev);
3782 dev_priv->mm.interruptible = was_interruptible;
3786 intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
3787 intel_ring_emit(ring, MI_SET_CONTEXT);
3788 intel_ring_emit(ring, i915_gem_obj_ggtt_offset(dev_priv->ips.renderctx) |
3790 MI_SAVE_EXT_STATE_EN |
3791 MI_RESTORE_EXT_STATE_EN |
3792 MI_RESTORE_INHIBIT);
3793 intel_ring_emit(ring, MI_SUSPEND_FLUSH);
3794 intel_ring_emit(ring, MI_NOOP);
3795 intel_ring_emit(ring, MI_FLUSH);
3796 intel_ring_advance(ring);
3799 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
3800 * does an implicit flush, combined with MI_FLUSH above, it should be
3801 * safe to assume that renderctx is valid
3803 ret = intel_ring_idle(ring);
3804 dev_priv->mm.interruptible = was_interruptible;
3806 DRM_ERROR("failed to enable ironlake power savings\n");
3807 ironlake_teardown_rc6(dev);
3811 I915_WRITE(PWRCTXA, i915_gem_obj_ggtt_offset(dev_priv->ips.pwrctx) | PWRCTX_EN);
3812 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
3814 intel_print_rc6_info(dev, INTEL_RC6_ENABLE);
3817 static unsigned long intel_pxfreq(u32 vidfreq)
3820 int div = (vidfreq & 0x3f0000) >> 16;
3821 int post = (vidfreq & 0x3000) >> 12;
3822 int pre = (vidfreq & 0x7);
3827 freq = ((div * 133333) / ((1<<post) * pre));
3832 static const struct cparams {
3838 { 1, 1333, 301, 28664 },
3839 { 1, 1066, 294, 24460 },
3840 { 1, 800, 294, 25192 },
3841 { 0, 1333, 276, 27605 },
3842 { 0, 1066, 276, 27605 },
3843 { 0, 800, 231, 23784 },
3846 static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
3848 u64 total_count, diff, ret;
3849 u32 count1, count2, count3, m = 0, c = 0;
3850 unsigned long now = jiffies_to_msecs(jiffies), diff1;
3853 assert_spin_locked(&mchdev_lock);
3855 diff1 = now - dev_priv->ips.last_time1;
3857 /* Prevent division-by-zero if we are asking too fast.
3858 * Also, we don't get interesting results if we are polling
3859 * faster than once in 10ms, so just return the saved value
3863 return dev_priv->ips.chipset_power;
3865 count1 = I915_READ(DMIEC);
3866 count2 = I915_READ(DDREC);
3867 count3 = I915_READ(CSIEC);
3869 total_count = count1 + count2 + count3;
3871 /* FIXME: handle per-counter overflow */
3872 if (total_count < dev_priv->ips.last_count1) {
3873 diff = ~0UL - dev_priv->ips.last_count1;
3874 diff += total_count;
3876 diff = total_count - dev_priv->ips.last_count1;
3879 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
3880 if (cparams[i].i == dev_priv->ips.c_m &&
3881 cparams[i].t == dev_priv->ips.r_t) {
3888 diff = div_u64(diff, diff1);
3889 ret = ((m * diff) + c);
3890 ret = div_u64(ret, 10);
3892 dev_priv->ips.last_count1 = total_count;
3893 dev_priv->ips.last_time1 = now;
3895 dev_priv->ips.chipset_power = ret;
3900 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
3902 struct drm_device *dev = dev_priv->dev;
3905 if (INTEL_INFO(dev)->gen != 5)
3908 spin_lock_irq(&mchdev_lock);
3910 val = __i915_chipset_val(dev_priv);
3912 spin_unlock_irq(&mchdev_lock);
3917 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
3919 unsigned long m, x, b;
3922 tsfs = I915_READ(TSFS);
3924 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
3925 x = I915_READ8(TR1);
3927 b = tsfs & TSFS_INTR_MASK;
3929 return ((m * x) / 127) - b;
3932 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
3934 struct drm_device *dev = dev_priv->dev;
3935 static const struct v_table {
3936 u16 vd; /* in .1 mil */
3937 u16 vm; /* in .1 mil */
4068 if (INTEL_INFO(dev)->is_mobile)
4069 return v_table[pxvid].vm;
4071 return v_table[pxvid].vd;
4074 static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
4076 struct timespec now, diff1;
4078 unsigned long diffms;
4081 assert_spin_locked(&mchdev_lock);
4083 getrawmonotonic(&now);
4084 diff1 = timespec_sub(now, dev_priv->ips.last_time2);
4086 /* Don't divide by 0 */
4087 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
4091 count = I915_READ(GFXEC);
4093 if (count < dev_priv->ips.last_count2) {
4094 diff = ~0UL - dev_priv->ips.last_count2;
4097 diff = count - dev_priv->ips.last_count2;
4100 dev_priv->ips.last_count2 = count;
4101 dev_priv->ips.last_time2 = now;
4103 /* More magic constants... */
4105 diff = div_u64(diff, diffms * 10);
4106 dev_priv->ips.gfx_power = diff;
4109 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
4111 struct drm_device *dev = dev_priv->dev;
4113 if (INTEL_INFO(dev)->gen != 5)
4116 spin_lock_irq(&mchdev_lock);
4118 __i915_update_gfx_val(dev_priv);
4120 spin_unlock_irq(&mchdev_lock);
4123 static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
4125 unsigned long t, corr, state1, corr2, state2;
4128 assert_spin_locked(&mchdev_lock);
4130 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4));
4131 pxvid = (pxvid >> 24) & 0x7f;
4132 ext_v = pvid_to_extvid(dev_priv, pxvid);
4136 t = i915_mch_val(dev_priv);
4138 /* Revel in the empirically derived constants */
4140 /* Correction factor in 1/100000 units */
4142 corr = ((t * 2349) + 135940);
4144 corr = ((t * 964) + 29317);
4146 corr = ((t * 301) + 1004);
4148 corr = corr * ((150142 * state1) / 10000 - 78642);
4150 corr2 = (corr * dev_priv->ips.corr);
4152 state2 = (corr2 * state1) / 10000;
4153 state2 /= 100; /* convert to mW */
4155 __i915_update_gfx_val(dev_priv);
4157 return dev_priv->ips.gfx_power + state2;
4160 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
4162 struct drm_device *dev = dev_priv->dev;
4165 if (INTEL_INFO(dev)->gen != 5)
4168 spin_lock_irq(&mchdev_lock);
4170 val = __i915_gfx_val(dev_priv);
4172 spin_unlock_irq(&mchdev_lock);
4178 * i915_read_mch_val - return value for IPS use
4180 * Calculate and return a value for the IPS driver to use when deciding whether
4181 * we have thermal and power headroom to increase CPU or GPU power budget.
4183 unsigned long i915_read_mch_val(void)
4185 struct drm_i915_private *dev_priv;
4186 unsigned long chipset_val, graphics_val, ret = 0;
4188 spin_lock_irq(&mchdev_lock);
4191 dev_priv = i915_mch_dev;
4193 chipset_val = __i915_chipset_val(dev_priv);
4194 graphics_val = __i915_gfx_val(dev_priv);
4196 ret = chipset_val + graphics_val;
4199 spin_unlock_irq(&mchdev_lock);
4203 EXPORT_SYMBOL_GPL(i915_read_mch_val);
4206 * i915_gpu_raise - raise GPU frequency limit
4208 * Raise the limit; IPS indicates we have thermal headroom.
4210 bool i915_gpu_raise(void)
4212 struct drm_i915_private *dev_priv;
4215 spin_lock_irq(&mchdev_lock);
4216 if (!i915_mch_dev) {
4220 dev_priv = i915_mch_dev;
4222 if (dev_priv->ips.max_delay > dev_priv->ips.fmax)
4223 dev_priv->ips.max_delay--;
4226 spin_unlock_irq(&mchdev_lock);
4230 EXPORT_SYMBOL_GPL(i915_gpu_raise);
4233 * i915_gpu_lower - lower GPU frequency limit
4235 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4236 * frequency maximum.
4238 bool i915_gpu_lower(void)
4240 struct drm_i915_private *dev_priv;
4243 spin_lock_irq(&mchdev_lock);
4244 if (!i915_mch_dev) {
4248 dev_priv = i915_mch_dev;
4250 if (dev_priv->ips.max_delay < dev_priv->ips.min_delay)
4251 dev_priv->ips.max_delay++;
4254 spin_unlock_irq(&mchdev_lock);
4258 EXPORT_SYMBOL_GPL(i915_gpu_lower);
4261 * i915_gpu_busy - indicate GPU business to IPS
4263 * Tell the IPS driver whether or not the GPU is busy.
4265 bool i915_gpu_busy(void)
4267 struct drm_i915_private *dev_priv;
4268 struct intel_ring_buffer *ring;
4272 spin_lock_irq(&mchdev_lock);
4275 dev_priv = i915_mch_dev;
4277 for_each_ring(ring, dev_priv, i)
4278 ret |= !list_empty(&ring->request_list);
4281 spin_unlock_irq(&mchdev_lock);
4285 EXPORT_SYMBOL_GPL(i915_gpu_busy);
4288 * i915_gpu_turbo_disable - disable graphics turbo
4290 * Disable graphics turbo by resetting the max frequency and setting the
4291 * current frequency to the default.
4293 bool i915_gpu_turbo_disable(void)
4295 struct drm_i915_private *dev_priv;
4298 spin_lock_irq(&mchdev_lock);
4299 if (!i915_mch_dev) {
4303 dev_priv = i915_mch_dev;
4305 dev_priv->ips.max_delay = dev_priv->ips.fstart;
4307 if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart))
4311 spin_unlock_irq(&mchdev_lock);
4315 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
4318 * Tells the intel_ips driver that the i915 driver is now loaded, if
4319 * IPS got loaded first.
4321 * This awkward dance is so that neither module has to depend on the
4322 * other in order for IPS to do the appropriate communication of
4323 * GPU turbo limits to i915.
4326 ips_ping_for_i915_load(void)
4330 link = symbol_get(ips_link_to_i915_driver);
4333 symbol_put(ips_link_to_i915_driver);
4337 void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
4339 /* We only register the i915 ips part with intel-ips once everything is
4340 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4341 spin_lock_irq(&mchdev_lock);
4342 i915_mch_dev = dev_priv;
4343 spin_unlock_irq(&mchdev_lock);
4345 ips_ping_for_i915_load();
4348 void intel_gpu_ips_teardown(void)
4350 spin_lock_irq(&mchdev_lock);
4351 i915_mch_dev = NULL;
4352 spin_unlock_irq(&mchdev_lock);
4355 static void intel_init_emon(struct drm_device *dev)
4357 struct drm_i915_private *dev_priv = dev->dev_private;
4362 /* Disable to program */
4366 /* Program energy weights for various events */
4367 I915_WRITE(SDEW, 0x15040d00);
4368 I915_WRITE(CSIEW0, 0x007f0000);
4369 I915_WRITE(CSIEW1, 0x1e220004);
4370 I915_WRITE(CSIEW2, 0x04000004);
4372 for (i = 0; i < 5; i++)
4373 I915_WRITE(PEW + (i * 4), 0);
4374 for (i = 0; i < 3; i++)
4375 I915_WRITE(DEW + (i * 4), 0);
4377 /* Program P-state weights to account for frequency power adjustment */
4378 for (i = 0; i < 16; i++) {
4379 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
4380 unsigned long freq = intel_pxfreq(pxvidfreq);
4381 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
4386 val *= (freq / 1000);
4388 val /= (127*127*900);
4390 DRM_ERROR("bad pxval: %ld\n", val);
4393 /* Render standby states get 0 weight */
4397 for (i = 0; i < 4; i++) {
4398 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
4399 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
4400 I915_WRITE(PXW + (i * 4), val);
4403 /* Adjust magic regs to magic values (more experimental results) */
4404 I915_WRITE(OGW0, 0);
4405 I915_WRITE(OGW1, 0);
4406 I915_WRITE(EG0, 0x00007f00);
4407 I915_WRITE(EG1, 0x0000000e);
4408 I915_WRITE(EG2, 0x000e0000);
4409 I915_WRITE(EG3, 0x68000300);
4410 I915_WRITE(EG4, 0x42000000);
4411 I915_WRITE(EG5, 0x00140031);
4415 for (i = 0; i < 8; i++)
4416 I915_WRITE(PXWL + (i * 4), 0);
4418 /* Enable PMON + select events */
4419 I915_WRITE(ECR, 0x80000019);
4421 lcfuse = I915_READ(LCFUSE02);
4423 dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
4426 void intel_disable_gt_powersave(struct drm_device *dev)
4428 struct drm_i915_private *dev_priv = dev->dev_private;
4430 /* Interrupts should be disabled already to avoid re-arming. */
4431 WARN_ON(dev->irq_enabled);
4433 if (IS_IRONLAKE_M(dev)) {
4434 ironlake_disable_drps(dev);
4435 ironlake_disable_rc6(dev);
4436 } else if (INTEL_INFO(dev)->gen >= 6) {
4437 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
4438 cancel_work_sync(&dev_priv->rps.work);
4439 mutex_lock(&dev_priv->rps.hw_lock);
4440 if (IS_VALLEYVIEW(dev))
4441 valleyview_disable_rps(dev);
4443 gen6_disable_rps(dev);
4444 dev_priv->rps.enabled = false;
4445 mutex_unlock(&dev_priv->rps.hw_lock);
4449 static void intel_gen6_powersave_work(struct work_struct *work)
4451 struct drm_i915_private *dev_priv =
4452 container_of(work, struct drm_i915_private,
4453 rps.delayed_resume_work.work);
4454 struct drm_device *dev = dev_priv->dev;
4456 mutex_lock(&dev_priv->rps.hw_lock);
4458 if (IS_VALLEYVIEW(dev)) {
4459 valleyview_enable_rps(dev);
4460 } else if (IS_BROADWELL(dev)) {
4461 gen8_enable_rps(dev);
4462 gen6_update_ring_freq(dev);
4464 gen6_enable_rps(dev);
4465 gen6_update_ring_freq(dev);
4467 dev_priv->rps.enabled = true;
4468 mutex_unlock(&dev_priv->rps.hw_lock);
4471 void intel_enable_gt_powersave(struct drm_device *dev)
4473 struct drm_i915_private *dev_priv = dev->dev_private;
4475 if (IS_IRONLAKE_M(dev)) {
4476 ironlake_enable_drps(dev);
4477 ironlake_enable_rc6(dev);
4478 intel_init_emon(dev);
4479 } else if (IS_GEN6(dev) || IS_GEN7(dev)) {
4481 * PCU communication is slow and this doesn't need to be
4482 * done at any specific time, so do this out of our fast path
4483 * to make resume and init faster.
4485 schedule_delayed_work(&dev_priv->rps.delayed_resume_work,
4486 round_jiffies_up_relative(HZ));
4490 static void ibx_init_clock_gating(struct drm_device *dev)
4492 struct drm_i915_private *dev_priv = dev->dev_private;
4495 * On Ibex Peak and Cougar Point, we need to disable clock
4496 * gating for the panel power sequencer or it will fail to
4497 * start up when no ports are active.
4499 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
4502 static void g4x_disable_trickle_feed(struct drm_device *dev)
4504 struct drm_i915_private *dev_priv = dev->dev_private;
4507 for_each_pipe(pipe) {
4508 I915_WRITE(DSPCNTR(pipe),
4509 I915_READ(DSPCNTR(pipe)) |
4510 DISPPLANE_TRICKLE_FEED_DISABLE);
4511 intel_flush_primary_plane(dev_priv, pipe);
4515 static void ilk_init_lp_watermarks(struct drm_device *dev)
4517 struct drm_i915_private *dev_priv = dev->dev_private;
4519 I915_WRITE(WM3_LP_ILK, I915_READ(WM3_LP_ILK) & ~WM1_LP_SR_EN);
4520 I915_WRITE(WM2_LP_ILK, I915_READ(WM2_LP_ILK) & ~WM1_LP_SR_EN);
4521 I915_WRITE(WM1_LP_ILK, I915_READ(WM1_LP_ILK) & ~WM1_LP_SR_EN);
4524 * Don't touch WM1S_LP_EN here.
4525 * Doing so could cause underruns.
4529 static void ironlake_init_clock_gating(struct drm_device *dev)
4531 struct drm_i915_private *dev_priv = dev->dev_private;
4532 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
4536 * WaFbcDisableDpfcClockGating:ilk
4538 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
4539 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
4540 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
4542 I915_WRITE(PCH_3DCGDIS0,
4543 MARIUNIT_CLOCK_GATE_DISABLE |
4544 SVSMUNIT_CLOCK_GATE_DISABLE);
4545 I915_WRITE(PCH_3DCGDIS1,
4546 VFMUNIT_CLOCK_GATE_DISABLE);
4549 * According to the spec the following bits should be set in
4550 * order to enable memory self-refresh
4551 * The bit 22/21 of 0x42004
4552 * The bit 5 of 0x42020
4553 * The bit 15 of 0x45000
4555 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4556 (I915_READ(ILK_DISPLAY_CHICKEN2) |
4557 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
4558 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
4559 I915_WRITE(DISP_ARB_CTL,
4560 (I915_READ(DISP_ARB_CTL) |
4563 ilk_init_lp_watermarks(dev);
4566 * Based on the document from hardware guys the following bits
4567 * should be set unconditionally in order to enable FBC.
4568 * The bit 22 of 0x42000
4569 * The bit 22 of 0x42004
4570 * The bit 7,8,9 of 0x42020.
4572 if (IS_IRONLAKE_M(dev)) {
4573 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
4574 I915_WRITE(ILK_DISPLAY_CHICKEN1,
4575 I915_READ(ILK_DISPLAY_CHICKEN1) |
4577 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4578 I915_READ(ILK_DISPLAY_CHICKEN2) |
4582 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
4584 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4585 I915_READ(ILK_DISPLAY_CHICKEN2) |
4586 ILK_ELPIN_409_SELECT);
4587 I915_WRITE(_3D_CHICKEN2,
4588 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
4589 _3D_CHICKEN2_WM_READ_PIPELINED);
4591 /* WaDisableRenderCachePipelinedFlush:ilk */
4592 I915_WRITE(CACHE_MODE_0,
4593 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
4595 g4x_disable_trickle_feed(dev);
4597 ibx_init_clock_gating(dev);
4600 static void cpt_init_clock_gating(struct drm_device *dev)
4602 struct drm_i915_private *dev_priv = dev->dev_private;
4607 * On Ibex Peak and Cougar Point, we need to disable clock
4608 * gating for the panel power sequencer or it will fail to
4609 * start up when no ports are active.
4611 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
4612 PCH_DPLUNIT_CLOCK_GATE_DISABLE |
4613 PCH_CPUNIT_CLOCK_GATE_DISABLE);
4614 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
4615 DPLS_EDP_PPS_FIX_DIS);
4616 /* The below fixes the weird display corruption, a few pixels shifted
4617 * downward, on (only) LVDS of some HP laptops with IVY.
4619 for_each_pipe(pipe) {
4620 val = I915_READ(TRANS_CHICKEN2(pipe));
4621 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
4622 val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
4623 if (dev_priv->vbt.fdi_rx_polarity_inverted)
4624 val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
4625 val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
4626 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
4627 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
4628 I915_WRITE(TRANS_CHICKEN2(pipe), val);
4630 /* WADP0ClockGatingDisable */
4631 for_each_pipe(pipe) {
4632 I915_WRITE(TRANS_CHICKEN1(pipe),
4633 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
4637 static void gen6_check_mch_setup(struct drm_device *dev)
4639 struct drm_i915_private *dev_priv = dev->dev_private;
4642 tmp = I915_READ(MCH_SSKPD);
4643 if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL) {
4644 DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp);
4645 DRM_INFO("This can cause pipe underruns and display issues.\n");
4646 DRM_INFO("Please upgrade your BIOS to fix this.\n");
4650 static void gen6_init_clock_gating(struct drm_device *dev)
4652 struct drm_i915_private *dev_priv = dev->dev_private;
4653 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
4655 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
4657 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4658 I915_READ(ILK_DISPLAY_CHICKEN2) |
4659 ILK_ELPIN_409_SELECT);
4661 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
4662 I915_WRITE(_3D_CHICKEN,
4663 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
4665 /* WaSetupGtModeTdRowDispatch:snb */
4666 if (IS_SNB_GT1(dev))
4667 I915_WRITE(GEN6_GT_MODE,
4668 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE));
4670 ilk_init_lp_watermarks(dev);
4672 I915_WRITE(CACHE_MODE_0,
4673 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
4675 I915_WRITE(GEN6_UCGCTL1,
4676 I915_READ(GEN6_UCGCTL1) |
4677 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
4678 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
4680 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
4681 * gating disable must be set. Failure to set it results in
4682 * flickering pixels due to Z write ordering failures after
4683 * some amount of runtime in the Mesa "fire" demo, and Unigine
4684 * Sanctuary and Tropics, and apparently anything else with
4685 * alpha test or pixel discard.
4687 * According to the spec, bit 11 (RCCUNIT) must also be set,
4688 * but we didn't debug actual testcases to find it out.
4690 * WaDisableRCCUnitClockGating:snb
4691 * WaDisableRCPBUnitClockGating:snb
4693 I915_WRITE(GEN6_UCGCTL2,
4694 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
4695 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
4697 /* Bspec says we need to always set all mask bits. */
4698 I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) |
4699 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL);
4703 * "This bit must be set if 3DSTATE_CLIP clip mode is set to normal and
4704 * 3DSTATE_SF number of SF output attributes is more than 16."
4706 I915_WRITE(_3D_CHICKEN3,
4707 _MASKED_BIT_ENABLE(_3D_CHICKEN3_SF_DISABLE_PIPELINED_ATTR_FETCH));
4710 * According to the spec the following bits should be
4711 * set in order to enable memory self-refresh and fbc:
4712 * The bit21 and bit22 of 0x42000
4713 * The bit21 and bit22 of 0x42004
4714 * The bit5 and bit7 of 0x42020
4715 * The bit14 of 0x70180
4716 * The bit14 of 0x71180
4718 * WaFbcAsynchFlipDisableFbcQueue:snb
4720 I915_WRITE(ILK_DISPLAY_CHICKEN1,
4721 I915_READ(ILK_DISPLAY_CHICKEN1) |
4722 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
4723 I915_WRITE(ILK_DISPLAY_CHICKEN2,
4724 I915_READ(ILK_DISPLAY_CHICKEN2) |
4725 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
4726 I915_WRITE(ILK_DSPCLK_GATE_D,
4727 I915_READ(ILK_DSPCLK_GATE_D) |
4728 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
4729 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
4731 g4x_disable_trickle_feed(dev);
4733 /* The default value should be 0x200 according to docs, but the two
4734 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
4735 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff));
4736 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI));
4738 cpt_init_clock_gating(dev);
4740 gen6_check_mch_setup(dev);
4743 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
4745 uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
4748 * WaVSThreadDispatchOverride:ivb,vlv
4750 * This actually overrides the dispatch
4751 * mode for all thread types.
4753 reg &= ~GEN7_FF_SCHED_MASK;
4754 reg |= GEN7_FF_TS_SCHED_HW;
4755 reg |= GEN7_FF_VS_SCHED_HW;
4756 reg |= GEN7_FF_DS_SCHED_HW;
4758 I915_WRITE(GEN7_FF_THREAD_MODE, reg);
4761 static void lpt_init_clock_gating(struct drm_device *dev)
4763 struct drm_i915_private *dev_priv = dev->dev_private;
4766 * TODO: this bit should only be enabled when really needed, then
4767 * disabled when not needed anymore in order to save power.
4769 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE)
4770 I915_WRITE(SOUTH_DSPCLK_GATE_D,
4771 I915_READ(SOUTH_DSPCLK_GATE_D) |
4772 PCH_LP_PARTITION_LEVEL_DISABLE);
4774 /* WADPOClockGatingDisable:hsw */
4775 I915_WRITE(_TRANSA_CHICKEN1,
4776 I915_READ(_TRANSA_CHICKEN1) |
4777 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
4780 static void lpt_suspend_hw(struct drm_device *dev)
4782 struct drm_i915_private *dev_priv = dev->dev_private;
4784 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
4785 uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D);
4787 val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
4788 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
4792 static void gen8_init_clock_gating(struct drm_device *dev)
4794 struct drm_i915_private *dev_priv = dev->dev_private;
4797 I915_WRITE(WM3_LP_ILK, 0);
4798 I915_WRITE(WM2_LP_ILK, 0);
4799 I915_WRITE(WM1_LP_ILK, 0);
4801 /* FIXME(BDW): Check all the w/a, some might only apply to
4802 * pre-production hw. */
4805 * This GEN8_CENTROID_PIXEL_OPT_DIS W/A is only needed for
4806 * pre-production hardware
4808 I915_WRITE(HALF_SLICE_CHICKEN3,
4809 _MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS));
4810 I915_WRITE(HALF_SLICE_CHICKEN3,
4811 _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS));
4812 I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE));
4814 I915_WRITE(_3D_CHICKEN3,
4815 _3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2));
4817 I915_WRITE(COMMON_SLICE_CHICKEN2,
4818 _MASKED_BIT_ENABLE(GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE));
4820 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
4821 _MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE));
4823 /* WaSwitchSolVfFArbitrationPriority:bdw */
4824 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
4826 /* WaPsrDPAMaskVBlankInSRD:bdw */
4827 I915_WRITE(CHICKEN_PAR1_1,
4828 I915_READ(CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD);
4830 /* WaPsrDPRSUnmaskVBlankInSRD:bdw */
4832 I915_WRITE(CHICKEN_PIPESL_1(i),
4833 I915_READ(CHICKEN_PIPESL_1(i) |
4834 DPRS_MASK_VBLANK_SRD));
4837 /* Use Force Non-Coherent whenever executing a 3D context. This is a
4838 * workaround for for a possible hang in the unlikely event a TLB
4839 * invalidation occurs during a PSD flush.
4841 I915_WRITE(HDC_CHICKEN0,
4842 I915_READ(HDC_CHICKEN0) |
4843 _MASKED_BIT_ENABLE(HDC_FORCE_NON_COHERENT));
4845 /* WaVSRefCountFullforceMissDisable:bdw */
4846 /* WaDSRefCountFullforceMissDisable:bdw */
4847 I915_WRITE(GEN7_FF_THREAD_MODE,
4848 I915_READ(GEN7_FF_THREAD_MODE) &
4849 ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME));
4852 static void haswell_init_clock_gating(struct drm_device *dev)
4854 struct drm_i915_private *dev_priv = dev->dev_private;
4856 ilk_init_lp_watermarks(dev);
4858 /* L3 caching of data atomics doesn't work -- disable it. */
4859 I915_WRITE(HSW_SCRATCH1, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE);
4860 I915_WRITE(HSW_ROW_CHICKEN3,
4861 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE));
4863 /* This is required by WaCatErrorRejectionIssue:hsw */
4864 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4865 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4866 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4868 /* WaVSRefCountFullforceMissDisable:hsw */
4869 I915_WRITE(GEN7_FF_THREAD_MODE,
4870 I915_READ(GEN7_FF_THREAD_MODE) & ~GEN7_FF_VS_REF_CNT_FFME);
4872 /* enable HiZ Raw Stall Optimization */
4873 I915_WRITE(CACHE_MODE_0_GEN7,
4874 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE));
4876 /* WaDisable4x2SubspanOptimization:hsw */
4877 I915_WRITE(CACHE_MODE_1,
4878 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4880 /* WaSwitchSolVfFArbitrationPriority:hsw */
4881 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
4883 /* WaRsPkgCStateDisplayPMReq:hsw */
4884 I915_WRITE(CHICKEN_PAR1_1,
4885 I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
4887 lpt_init_clock_gating(dev);
4890 static void ivybridge_init_clock_gating(struct drm_device *dev)
4892 struct drm_i915_private *dev_priv = dev->dev_private;
4895 ilk_init_lp_watermarks(dev);
4897 I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
4899 /* WaDisableEarlyCull:ivb */
4900 I915_WRITE(_3D_CHICKEN3,
4901 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
4903 /* WaDisableBackToBackFlipFix:ivb */
4904 I915_WRITE(IVB_CHICKEN3,
4905 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
4906 CHICKEN3_DGMG_DONE_FIX_DISABLE);
4908 /* WaDisablePSDDualDispatchEnable:ivb */
4909 if (IS_IVB_GT1(dev))
4910 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
4911 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
4913 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
4914 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
4915 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
4917 /* WaApplyL3ControlAndL3ChickenMode:ivb */
4918 I915_WRITE(GEN7_L3CNTLREG1,
4919 GEN7_WA_FOR_GEN7_L3_CONTROL);
4920 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
4921 GEN7_WA_L3_CHICKEN_MODE);
4922 if (IS_IVB_GT1(dev))
4923 I915_WRITE(GEN7_ROW_CHICKEN2,
4924 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4926 /* must write both registers */
4927 I915_WRITE(GEN7_ROW_CHICKEN2,
4928 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4929 I915_WRITE(GEN7_ROW_CHICKEN2_GT2,
4930 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
4933 /* WaForceL3Serialization:ivb */
4934 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
4935 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
4938 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
4939 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
4941 I915_WRITE(GEN6_UCGCTL2,
4942 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
4944 /* This is required by WaCatErrorRejectionIssue:ivb */
4945 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
4946 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
4947 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
4949 g4x_disable_trickle_feed(dev);
4951 gen7_setup_fixed_func_scheduler(dev_priv);
4953 /* enable HiZ Raw Stall Optimization */
4954 I915_WRITE(CACHE_MODE_0_GEN7,
4955 _MASKED_BIT_DISABLE(HIZ_RAW_STALL_OPT_DISABLE));
4957 /* WaDisable4x2SubspanOptimization:ivb */
4958 I915_WRITE(CACHE_MODE_1,
4959 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
4961 snpcr = I915_READ(GEN6_MBCUNIT_SNPCR);
4962 snpcr &= ~GEN6_MBC_SNPCR_MASK;
4963 snpcr |= GEN6_MBC_SNPCR_MED;
4964 I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
4966 if (!HAS_PCH_NOP(dev))
4967 cpt_init_clock_gating(dev);
4969 gen6_check_mch_setup(dev);
4972 static void valleyview_init_clock_gating(struct drm_device *dev)
4974 struct drm_i915_private *dev_priv = dev->dev_private;
4977 mutex_lock(&dev_priv->rps.hw_lock);
4978 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
4979 mutex_unlock(&dev_priv->rps.hw_lock);
4980 switch ((val >> 6) & 3) {
4982 dev_priv->mem_freq = 800;
4985 dev_priv->mem_freq = 1066;
4988 dev_priv->mem_freq = 1333;
4991 dev_priv->mem_freq = 1333;
4994 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
4996 I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
4998 /* WaDisableEarlyCull:vlv */
4999 I915_WRITE(_3D_CHICKEN3,
5000 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
5002 /* WaDisableBackToBackFlipFix:vlv */
5003 I915_WRITE(IVB_CHICKEN3,
5004 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
5005 CHICKEN3_DGMG_DONE_FIX_DISABLE);
5007 /* WaPsdDispatchEnable:vlv */
5008 /* WaDisablePSDDualDispatchEnable:vlv */
5009 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
5010 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP |
5011 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
5013 /* WaDisableL3CacheAging:vlv */
5014 I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS);
5016 /* WaForceL3Serialization:vlv */
5017 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
5018 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
5020 /* WaDisableDopClockGating:vlv */
5021 I915_WRITE(GEN7_ROW_CHICKEN2,
5022 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5024 /* This is required by WaCatErrorRejectionIssue:vlv */
5025 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
5026 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
5027 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
5029 gen7_setup_fixed_func_scheduler(dev_priv);
5032 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5033 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
5035 I915_WRITE(GEN6_UCGCTL2,
5036 GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
5038 /* WaDisableL3Bank2xClockGate:vlv */
5039 I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE);
5041 I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
5044 * BSpec says this must be set, even though
5045 * WaDisable4x2SubspanOptimization isn't listed for VLV.
5047 I915_WRITE(CACHE_MODE_1,
5048 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
5051 * WaIncreaseL3CreditsForVLVB0:vlv
5052 * This is the hardware default actually.
5054 I915_WRITE(GEN7_L3SQCREG1, VLV_B0_WA_L3SQCREG1_VALUE);
5057 * WaDisableVLVClockGating_VBIIssue:vlv
5058 * Disable clock gating on th GCFG unit to prevent a delay
5059 * in the reporting of vblank events.
5061 I915_WRITE(VLV_GUNIT_CLOCK_GATE, GCFG_DIS);
5064 static void g4x_init_clock_gating(struct drm_device *dev)
5066 struct drm_i915_private *dev_priv = dev->dev_private;
5067 uint32_t dspclk_gate;
5069 I915_WRITE(RENCLK_GATE_D1, 0);
5070 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
5071 GS_UNIT_CLOCK_GATE_DISABLE |
5072 CL_UNIT_CLOCK_GATE_DISABLE);
5073 I915_WRITE(RAMCLK_GATE_D, 0);
5074 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
5075 OVRUNIT_CLOCK_GATE_DISABLE |
5076 OVCUNIT_CLOCK_GATE_DISABLE;
5078 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
5079 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
5081 /* WaDisableRenderCachePipelinedFlush */
5082 I915_WRITE(CACHE_MODE_0,
5083 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
5085 g4x_disable_trickle_feed(dev);
5088 static void crestline_init_clock_gating(struct drm_device *dev)
5090 struct drm_i915_private *dev_priv = dev->dev_private;
5092 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
5093 I915_WRITE(RENCLK_GATE_D2, 0);
5094 I915_WRITE(DSPCLK_GATE_D, 0);
5095 I915_WRITE(RAMCLK_GATE_D, 0);
5096 I915_WRITE16(DEUC, 0);
5097 I915_WRITE(MI_ARB_STATE,
5098 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5101 static void broadwater_init_clock_gating(struct drm_device *dev)
5103 struct drm_i915_private *dev_priv = dev->dev_private;
5105 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
5106 I965_RCC_CLOCK_GATE_DISABLE |
5107 I965_RCPB_CLOCK_GATE_DISABLE |
5108 I965_ISC_CLOCK_GATE_DISABLE |
5109 I965_FBC_CLOCK_GATE_DISABLE);
5110 I915_WRITE(RENCLK_GATE_D2, 0);
5111 I915_WRITE(MI_ARB_STATE,
5112 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5115 static void gen3_init_clock_gating(struct drm_device *dev)
5117 struct drm_i915_private *dev_priv = dev->dev_private;
5118 u32 dstate = I915_READ(D_STATE);
5120 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
5121 DSTATE_DOT_CLOCK_GATING;
5122 I915_WRITE(D_STATE, dstate);
5124 if (IS_PINEVIEW(dev))
5125 I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
5127 /* IIR "flip pending" means done if this bit is set */
5128 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
5131 static void i85x_init_clock_gating(struct drm_device *dev)
5133 struct drm_i915_private *dev_priv = dev->dev_private;
5135 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
5138 static void i830_init_clock_gating(struct drm_device *dev)
5140 struct drm_i915_private *dev_priv = dev->dev_private;
5142 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
5145 void intel_init_clock_gating(struct drm_device *dev)
5147 struct drm_i915_private *dev_priv = dev->dev_private;
5149 dev_priv->display.init_clock_gating(dev);
5152 void intel_suspend_hw(struct drm_device *dev)
5154 if (HAS_PCH_LPT(dev))
5155 lpt_suspend_hw(dev);
5158 #define for_each_power_well(i, power_well, domain_mask, power_domains) \
5160 i < (power_domains)->power_well_count && \
5161 ((power_well) = &(power_domains)->power_wells[i]); \
5163 if ((power_well)->domains & (domain_mask))
5165 #define for_each_power_well_rev(i, power_well, domain_mask, power_domains) \
5166 for (i = (power_domains)->power_well_count - 1; \
5167 i >= 0 && ((power_well) = &(power_domains)->power_wells[i]);\
5169 if ((power_well)->domains & (domain_mask))
5172 * We should only use the power well if we explicitly asked the hardware to
5173 * enable it, so check if it's enabled and also check if we've requested it to
5176 static bool hsw_power_well_enabled(struct drm_device *dev,
5177 struct i915_power_well *power_well)
5179 struct drm_i915_private *dev_priv = dev->dev_private;
5181 return I915_READ(HSW_PWR_WELL_DRIVER) ==
5182 (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED);
5185 bool intel_display_power_enabled_sw(struct drm_device *dev,
5186 enum intel_display_power_domain domain)
5188 struct drm_i915_private *dev_priv = dev->dev_private;
5189 struct i915_power_domains *power_domains;
5191 power_domains = &dev_priv->power_domains;
5193 return power_domains->domain_use_count[domain];
5196 bool intel_display_power_enabled(struct drm_device *dev,
5197 enum intel_display_power_domain domain)
5199 struct drm_i915_private *dev_priv = dev->dev_private;
5200 struct i915_power_domains *power_domains;
5201 struct i915_power_well *power_well;
5205 power_domains = &dev_priv->power_domains;
5209 mutex_lock(&power_domains->lock);
5210 for_each_power_well_rev(i, power_well, BIT(domain), power_domains) {
5211 if (power_well->always_on)
5214 if (!power_well->is_enabled(dev, power_well)) {
5219 mutex_unlock(&power_domains->lock);
5224 static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv)
5226 struct drm_device *dev = dev_priv->dev;
5227 unsigned long irqflags;
5230 * After we re-enable the power well, if we touch VGA register 0x3d5
5231 * we'll get unclaimed register interrupts. This stops after we write
5232 * anything to the VGA MSR register. The vgacon module uses this
5233 * register all the time, so if we unbind our driver and, as a
5234 * consequence, bind vgacon, we'll get stuck in an infinite loop at
5235 * console_unlock(). So make here we touch the VGA MSR register, making
5236 * sure vgacon can keep working normally without triggering interrupts
5237 * and error messages.
5239 vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
5240 outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
5241 vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
5243 if (IS_BROADWELL(dev)) {
5244 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
5245 I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_B),
5246 dev_priv->de_irq_mask[PIPE_B]);
5247 I915_WRITE(GEN8_DE_PIPE_IER(PIPE_B),
5248 ~dev_priv->de_irq_mask[PIPE_B] |
5250 I915_WRITE(GEN8_DE_PIPE_IMR(PIPE_C),
5251 dev_priv->de_irq_mask[PIPE_C]);
5252 I915_WRITE(GEN8_DE_PIPE_IER(PIPE_C),
5253 ~dev_priv->de_irq_mask[PIPE_C] |
5255 POSTING_READ(GEN8_DE_PIPE_IER(PIPE_C));
5256 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
5260 static void hsw_power_well_post_disable(struct drm_i915_private *dev_priv)
5262 struct drm_device *dev = dev_priv->dev;
5264 unsigned long irqflags;
5267 * After this, the registers on the pipes that are part of the power
5268 * well will become zero, so we have to adjust our counters according to
5271 * FIXME: Should we do this in general in drm_vblank_post_modeset?
5273 spin_lock_irqsave(&dev->vbl_lock, irqflags);
5276 dev->vblank[p].last = 0;
5277 spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
5280 static void hsw_set_power_well(struct drm_device *dev,
5281 struct i915_power_well *power_well, bool enable)
5283 struct drm_i915_private *dev_priv = dev->dev_private;
5284 bool is_enabled, enable_requested;
5287 WARN_ON(dev_priv->pc8.enabled);
5289 tmp = I915_READ(HSW_PWR_WELL_DRIVER);
5290 is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED;
5291 enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST;
5294 if (!enable_requested)
5295 I915_WRITE(HSW_PWR_WELL_DRIVER,
5296 HSW_PWR_WELL_ENABLE_REQUEST);
5299 DRM_DEBUG_KMS("Enabling power well\n");
5300 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
5301 HSW_PWR_WELL_STATE_ENABLED), 20))
5302 DRM_ERROR("Timeout enabling power well\n");
5305 hsw_power_well_post_enable(dev_priv);
5307 if (enable_requested) {
5308 I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
5309 POSTING_READ(HSW_PWR_WELL_DRIVER);
5310 DRM_DEBUG_KMS("Requesting to disable the power well\n");
5312 hsw_power_well_post_disable(dev_priv);
5317 static void __intel_power_well_get(struct drm_device *dev,
5318 struct i915_power_well *power_well)
5320 struct drm_i915_private *dev_priv = dev->dev_private;
5322 if (!power_well->count++ && power_well->set) {
5323 hsw_disable_package_c8(dev_priv);
5324 power_well->set(dev, power_well, true);
5328 static void __intel_power_well_put(struct drm_device *dev,
5329 struct i915_power_well *power_well)
5331 struct drm_i915_private *dev_priv = dev->dev_private;
5333 WARN_ON(!power_well->count);
5335 if (!--power_well->count && power_well->set &&
5336 i915.disable_power_well) {
5337 power_well->set(dev, power_well, false);
5338 hsw_enable_package_c8(dev_priv);
5342 void intel_display_power_get(struct drm_device *dev,
5343 enum intel_display_power_domain domain)
5345 struct drm_i915_private *dev_priv = dev->dev_private;
5346 struct i915_power_domains *power_domains;
5347 struct i915_power_well *power_well;
5350 power_domains = &dev_priv->power_domains;
5352 mutex_lock(&power_domains->lock);
5354 for_each_power_well(i, power_well, BIT(domain), power_domains)
5355 __intel_power_well_get(dev, power_well);
5357 power_domains->domain_use_count[domain]++;
5359 mutex_unlock(&power_domains->lock);
5362 void intel_display_power_put(struct drm_device *dev,
5363 enum intel_display_power_domain domain)
5365 struct drm_i915_private *dev_priv = dev->dev_private;
5366 struct i915_power_domains *power_domains;
5367 struct i915_power_well *power_well;
5370 power_domains = &dev_priv->power_domains;
5372 mutex_lock(&power_domains->lock);
5374 WARN_ON(!power_domains->domain_use_count[domain]);
5375 power_domains->domain_use_count[domain]--;
5377 for_each_power_well_rev(i, power_well, BIT(domain), power_domains)
5378 __intel_power_well_put(dev, power_well);
5380 mutex_unlock(&power_domains->lock);
5383 static struct i915_power_domains *hsw_pwr;
5385 /* Display audio driver power well request */
5386 void i915_request_power_well(void)
5388 struct drm_i915_private *dev_priv;
5390 if (WARN_ON(!hsw_pwr))
5393 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
5395 intel_display_power_get(dev_priv->dev, POWER_DOMAIN_AUDIO);
5397 EXPORT_SYMBOL_GPL(i915_request_power_well);
5399 /* Display audio driver power well release */
5400 void i915_release_power_well(void)
5402 struct drm_i915_private *dev_priv;
5404 if (WARN_ON(!hsw_pwr))
5407 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
5409 intel_display_power_put(dev_priv->dev, POWER_DOMAIN_AUDIO);
5411 EXPORT_SYMBOL_GPL(i915_release_power_well);
5413 static struct i915_power_well i9xx_always_on_power_well[] = {
5415 .name = "always-on",
5417 .domains = POWER_DOMAIN_MASK,
5421 static struct i915_power_well hsw_power_wells[] = {
5423 .name = "always-on",
5425 .domains = HSW_ALWAYS_ON_POWER_DOMAINS,
5429 .domains = POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS,
5430 .is_enabled = hsw_power_well_enabled,
5431 .set = hsw_set_power_well,
5435 static struct i915_power_well bdw_power_wells[] = {
5437 .name = "always-on",
5439 .domains = BDW_ALWAYS_ON_POWER_DOMAINS,
5443 .domains = POWER_DOMAIN_MASK & ~BDW_ALWAYS_ON_POWER_DOMAINS,
5444 .is_enabled = hsw_power_well_enabled,
5445 .set = hsw_set_power_well,
5449 #define set_power_wells(power_domains, __power_wells) ({ \
5450 (power_domains)->power_wells = (__power_wells); \
5451 (power_domains)->power_well_count = ARRAY_SIZE(__power_wells); \
5454 int intel_power_domains_init(struct drm_device *dev)
5456 struct drm_i915_private *dev_priv = dev->dev_private;
5457 struct i915_power_domains *power_domains = &dev_priv->power_domains;
5459 mutex_init(&power_domains->lock);
5462 * The enabling order will be from lower to higher indexed wells,
5463 * the disabling order is reversed.
5465 if (IS_HASWELL(dev)) {
5466 set_power_wells(power_domains, hsw_power_wells);
5467 hsw_pwr = power_domains;
5468 } else if (IS_BROADWELL(dev)) {
5469 set_power_wells(power_domains, bdw_power_wells);
5470 hsw_pwr = power_domains;
5472 set_power_wells(power_domains, i9xx_always_on_power_well);
5478 void intel_power_domains_remove(struct drm_device *dev)
5483 static void intel_power_domains_resume(struct drm_device *dev)
5485 struct drm_i915_private *dev_priv = dev->dev_private;
5486 struct i915_power_domains *power_domains = &dev_priv->power_domains;
5487 struct i915_power_well *power_well;
5490 mutex_lock(&power_domains->lock);
5491 for_each_power_well(i, power_well, POWER_DOMAIN_MASK, power_domains) {
5492 if (power_well->set)
5493 power_well->set(dev, power_well, power_well->count > 0);
5495 mutex_unlock(&power_domains->lock);
5499 * Starting with Haswell, we have a "Power Down Well" that can be turned off
5500 * when not needed anymore. We have 4 registers that can request the power well
5501 * to be enabled, and it will only be disabled if none of the registers is
5502 * requesting it to be enabled.
5504 void intel_power_domains_init_hw(struct drm_device *dev)
5506 struct drm_i915_private *dev_priv = dev->dev_private;
5508 /* For now, we need the power well to be always enabled. */
5509 intel_display_set_init_power(dev, true);
5510 intel_power_domains_resume(dev);
5512 if (!(IS_HASWELL(dev) || IS_BROADWELL(dev)))
5515 /* We're taking over the BIOS, so clear any requests made by it since
5516 * the driver is in charge now. */
5517 if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST)
5518 I915_WRITE(HSW_PWR_WELL_BIOS, 0);
5521 /* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */
5522 void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv)
5524 hsw_disable_package_c8(dev_priv);
5527 void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv)
5529 hsw_enable_package_c8(dev_priv);
5532 void intel_runtime_pm_get(struct drm_i915_private *dev_priv)
5534 struct drm_device *dev = dev_priv->dev;
5535 struct device *device = &dev->pdev->dev;
5537 if (!HAS_RUNTIME_PM(dev))
5540 pm_runtime_get_sync(device);
5541 WARN(dev_priv->pm.suspended, "Device still suspended.\n");
5544 void intel_runtime_pm_put(struct drm_i915_private *dev_priv)
5546 struct drm_device *dev = dev_priv->dev;
5547 struct device *device = &dev->pdev->dev;
5549 if (!HAS_RUNTIME_PM(dev))
5552 pm_runtime_mark_last_busy(device);
5553 pm_runtime_put_autosuspend(device);
5556 void intel_init_runtime_pm(struct drm_i915_private *dev_priv)
5558 struct drm_device *dev = dev_priv->dev;
5559 struct device *device = &dev->pdev->dev;
5561 dev_priv->pm.suspended = false;
5563 if (!HAS_RUNTIME_PM(dev))
5566 pm_runtime_set_active(device);
5568 pm_runtime_set_autosuspend_delay(device, 10000); /* 10s */
5569 pm_runtime_mark_last_busy(device);
5570 pm_runtime_use_autosuspend(device);
5573 void intel_fini_runtime_pm(struct drm_i915_private *dev_priv)
5575 struct drm_device *dev = dev_priv->dev;
5576 struct device *device = &dev->pdev->dev;
5578 if (!HAS_RUNTIME_PM(dev))
5581 /* Make sure we're not suspended first. */
5582 pm_runtime_get_sync(device);
5583 pm_runtime_disable(device);
5586 /* Set up chip specific power management-related functions */
5587 void intel_init_pm(struct drm_device *dev)
5589 struct drm_i915_private *dev_priv = dev->dev_private;
5592 if (INTEL_INFO(dev)->gen >= 7) {
5593 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
5594 dev_priv->display.enable_fbc = gen7_enable_fbc;
5595 dev_priv->display.disable_fbc = ironlake_disable_fbc;
5596 } else if (INTEL_INFO(dev)->gen >= 5) {
5597 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
5598 dev_priv->display.enable_fbc = ironlake_enable_fbc;
5599 dev_priv->display.disable_fbc = ironlake_disable_fbc;
5600 } else if (IS_GM45(dev)) {
5601 dev_priv->display.fbc_enabled = g4x_fbc_enabled;
5602 dev_priv->display.enable_fbc = g4x_enable_fbc;
5603 dev_priv->display.disable_fbc = g4x_disable_fbc;
5605 dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
5606 dev_priv->display.enable_fbc = i8xx_enable_fbc;
5607 dev_priv->display.disable_fbc = i8xx_disable_fbc;
5609 /* This value was pulled out of someone's hat */
5610 I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT);
5615 if (IS_PINEVIEW(dev))
5616 i915_pineview_get_mem_freq(dev);
5617 else if (IS_GEN5(dev))
5618 i915_ironlake_get_mem_freq(dev);
5620 /* For FIFO watermark updates */
5621 if (HAS_PCH_SPLIT(dev)) {
5622 intel_setup_wm_latency(dev);
5624 if ((IS_GEN5(dev) && dev_priv->wm.pri_latency[1] &&
5625 dev_priv->wm.spr_latency[1] && dev_priv->wm.cur_latency[1]) ||
5626 (!IS_GEN5(dev) && dev_priv->wm.pri_latency[0] &&
5627 dev_priv->wm.spr_latency[0] && dev_priv->wm.cur_latency[0])) {
5628 dev_priv->display.update_wm = ilk_update_wm;
5629 dev_priv->display.update_sprite_wm = ilk_update_sprite_wm;
5631 DRM_DEBUG_KMS("Failed to read display plane latency. "
5636 dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
5637 else if (IS_GEN6(dev))
5638 dev_priv->display.init_clock_gating = gen6_init_clock_gating;
5639 else if (IS_IVYBRIDGE(dev))
5640 dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
5641 else if (IS_HASWELL(dev))
5642 dev_priv->display.init_clock_gating = haswell_init_clock_gating;
5643 else if (INTEL_INFO(dev)->gen == 8)
5644 dev_priv->display.init_clock_gating = gen8_init_clock_gating;
5645 } else if (IS_VALLEYVIEW(dev)) {
5646 dev_priv->display.update_wm = valleyview_update_wm;
5647 dev_priv->display.init_clock_gating =
5648 valleyview_init_clock_gating;
5649 } else if (IS_PINEVIEW(dev)) {
5650 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
5653 dev_priv->mem_freq)) {
5654 DRM_INFO("failed to find known CxSR latency "
5655 "(found ddr%s fsb freq %d, mem freq %d), "
5657 (dev_priv->is_ddr3 == 1) ? "3" : "2",
5658 dev_priv->fsb_freq, dev_priv->mem_freq);
5659 /* Disable CxSR and never update its watermark again */
5660 pineview_disable_cxsr(dev);
5661 dev_priv->display.update_wm = NULL;
5663 dev_priv->display.update_wm = pineview_update_wm;
5664 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
5665 } else if (IS_G4X(dev)) {
5666 dev_priv->display.update_wm = g4x_update_wm;
5667 dev_priv->display.init_clock_gating = g4x_init_clock_gating;
5668 } else if (IS_GEN4(dev)) {
5669 dev_priv->display.update_wm = i965_update_wm;
5670 if (IS_CRESTLINE(dev))
5671 dev_priv->display.init_clock_gating = crestline_init_clock_gating;
5672 else if (IS_BROADWATER(dev))
5673 dev_priv->display.init_clock_gating = broadwater_init_clock_gating;
5674 } else if (IS_GEN3(dev)) {
5675 dev_priv->display.update_wm = i9xx_update_wm;
5676 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
5677 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
5678 } else if (IS_GEN2(dev)) {
5679 if (INTEL_INFO(dev)->num_pipes == 1) {
5680 dev_priv->display.update_wm = i845_update_wm;
5681 dev_priv->display.get_fifo_size = i845_get_fifo_size;
5683 dev_priv->display.update_wm = i9xx_update_wm;
5684 dev_priv->display.get_fifo_size = i830_get_fifo_size;
5687 if (IS_I85X(dev) || IS_I865G(dev))
5688 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
5690 dev_priv->display.init_clock_gating = i830_init_clock_gating;
5692 DRM_ERROR("unexpected fall-through in intel_init_pm\n");
5696 int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val)
5698 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5700 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
5701 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
5705 I915_WRITE(GEN6_PCODE_DATA, *val);
5706 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
5708 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
5710 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox);
5714 *val = I915_READ(GEN6_PCODE_DATA);
5715 I915_WRITE(GEN6_PCODE_DATA, 0);
5720 int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val)
5722 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
5724 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
5725 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
5729 I915_WRITE(GEN6_PCODE_DATA, val);
5730 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
5732 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
5734 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox);
5738 I915_WRITE(GEN6_PCODE_DATA, 0);
5743 int vlv_gpu_freq(struct drm_i915_private *dev_priv, int val)
5748 switch (dev_priv->mem_freq) {
5762 return DIV_ROUND_CLOSEST(dev_priv->mem_freq * (val + 6 - 0xbd), 4 * div);
5765 int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val)
5770 switch (dev_priv->mem_freq) {
5784 return DIV_ROUND_CLOSEST(4 * mul * val, dev_priv->mem_freq) + 0xbd - 6;
5787 void intel_pm_setup(struct drm_device *dev)
5789 struct drm_i915_private *dev_priv = dev->dev_private;
5791 mutex_init(&dev_priv->rps.hw_lock);
5793 mutex_init(&dev_priv->pc8.lock);
5794 dev_priv->pc8.requirements_met = false;
5795 dev_priv->pc8.gpu_idle = false;
5796 dev_priv->pc8.irqs_disabled = false;
5797 dev_priv->pc8.enabled = false;
5798 dev_priv->pc8.disable_count = 2; /* requirements_met + gpu_idle */
5799 INIT_DELAYED_WORK(&dev_priv->pc8.enable_work, hsw_enable_pc8_work);
5800 INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
5801 intel_gen6_powersave_work);