1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
33 #include <linux/circ_buf.h>
35 #include <drm/i915_drm.h>
37 #include "i915_trace.h"
38 #include "intel_drv.h"
41 * DOC: interrupt handling
43 * These functions provide the basic support for enabling and disabling the
44 * interrupt handling support. There's a lot more functionality in i915_irq.c
45 * and related files, but that will be described in separate chapters.
48 static const u32 hpd_ilk[HPD_NUM_PINS] = {
49 [HPD_PORT_A] = DE_DP_A_HOTPLUG,
52 static const u32 hpd_ivb[HPD_NUM_PINS] = {
53 [HPD_PORT_A] = DE_DP_A_HOTPLUG_IVB,
56 static const u32 hpd_bdw[HPD_NUM_PINS] = {
57 [HPD_PORT_A] = GEN8_PORT_DP_A_HOTPLUG,
60 static const u32 hpd_ibx[HPD_NUM_PINS] = {
61 [HPD_CRT] = SDE_CRT_HOTPLUG,
62 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
63 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
64 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
65 [HPD_PORT_D] = SDE_PORTD_HOTPLUG
68 static const u32 hpd_cpt[HPD_NUM_PINS] = {
69 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
70 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
71 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
72 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
73 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
76 static const u32 hpd_spt[HPD_NUM_PINS] = {
77 [HPD_PORT_A] = SDE_PORTA_HOTPLUG_SPT,
78 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
79 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
80 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT,
81 [HPD_PORT_E] = SDE_PORTE_HOTPLUG_SPT
84 static const u32 hpd_mask_i915[HPD_NUM_PINS] = {
85 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
86 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
87 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
88 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
89 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
90 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
93 static const u32 hpd_status_g4x[HPD_NUM_PINS] = {
94 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
95 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
96 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
97 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
98 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
99 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
102 static const u32 hpd_status_i915[HPD_NUM_PINS] = {
103 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
104 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
105 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
106 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
107 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
108 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
112 static const u32 hpd_bxt[HPD_NUM_PINS] = {
113 [HPD_PORT_A] = BXT_DE_PORT_HP_DDIA,
114 [HPD_PORT_B] = BXT_DE_PORT_HP_DDIB,
115 [HPD_PORT_C] = BXT_DE_PORT_HP_DDIC
118 /* IIR can theoretically queue up two events. Be paranoid. */
119 #define GEN8_IRQ_RESET_NDX(type, which) do { \
120 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
121 POSTING_READ(GEN8_##type##_IMR(which)); \
122 I915_WRITE(GEN8_##type##_IER(which), 0); \
123 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
124 POSTING_READ(GEN8_##type##_IIR(which)); \
125 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
126 POSTING_READ(GEN8_##type##_IIR(which)); \
129 #define GEN5_IRQ_RESET(type) do { \
130 I915_WRITE(type##IMR, 0xffffffff); \
131 POSTING_READ(type##IMR); \
132 I915_WRITE(type##IER, 0); \
133 I915_WRITE(type##IIR, 0xffffffff); \
134 POSTING_READ(type##IIR); \
135 I915_WRITE(type##IIR, 0xffffffff); \
136 POSTING_READ(type##IIR); \
140 * We should clear IMR at preinstall/uninstall, and just check at postinstall.
142 static void gen5_assert_iir_is_zero(struct drm_i915_private *dev_priv,
145 u32 val = I915_READ(reg);
150 WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
151 i915_mmio_reg_offset(reg), val);
152 I915_WRITE(reg, 0xffffffff);
154 I915_WRITE(reg, 0xffffffff);
158 #define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
159 gen5_assert_iir_is_zero(dev_priv, GEN8_##type##_IIR(which)); \
160 I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
161 I915_WRITE(GEN8_##type##_IMR(which), (imr_val)); \
162 POSTING_READ(GEN8_##type##_IMR(which)); \
165 #define GEN5_IRQ_INIT(type, imr_val, ier_val) do { \
166 gen5_assert_iir_is_zero(dev_priv, type##IIR); \
167 I915_WRITE(type##IER, (ier_val)); \
168 I915_WRITE(type##IMR, (imr_val)); \
169 POSTING_READ(type##IMR); \
172 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
174 /* For display hotplug interrupt */
176 i915_hotplug_interrupt_update_locked(struct drm_i915_private *dev_priv,
182 assert_spin_locked(&dev_priv->irq_lock);
183 WARN_ON(bits & ~mask);
185 val = I915_READ(PORT_HOTPLUG_EN);
188 I915_WRITE(PORT_HOTPLUG_EN, val);
192 * i915_hotplug_interrupt_update - update hotplug interrupt enable
193 * @dev_priv: driver private
194 * @mask: bits to update
195 * @bits: bits to enable
196 * NOTE: the HPD enable bits are modified both inside and outside
197 * of an interrupt context. To avoid that read-modify-write cycles
198 * interfer, these bits are protected by a spinlock. Since this
199 * function is usually not called from a context where the lock is
200 * held already, this function acquires the lock itself. A non-locking
201 * version is also available.
203 void i915_hotplug_interrupt_update(struct drm_i915_private *dev_priv,
207 spin_lock_irq(&dev_priv->irq_lock);
208 i915_hotplug_interrupt_update_locked(dev_priv, mask, bits);
209 spin_unlock_irq(&dev_priv->irq_lock);
213 * ilk_update_display_irq - update DEIMR
214 * @dev_priv: driver private
215 * @interrupt_mask: mask of interrupt bits to update
216 * @enabled_irq_mask: mask of interrupt bits to enable
218 void ilk_update_display_irq(struct drm_i915_private *dev_priv,
219 uint32_t interrupt_mask,
220 uint32_t enabled_irq_mask)
224 assert_spin_locked(&dev_priv->irq_lock);
226 WARN_ON(enabled_irq_mask & ~interrupt_mask);
228 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
231 new_val = dev_priv->irq_mask;
232 new_val &= ~interrupt_mask;
233 new_val |= (~enabled_irq_mask & interrupt_mask);
235 if (new_val != dev_priv->irq_mask) {
236 dev_priv->irq_mask = new_val;
237 I915_WRITE(DEIMR, dev_priv->irq_mask);
243 * ilk_update_gt_irq - update GTIMR
244 * @dev_priv: driver private
245 * @interrupt_mask: mask of interrupt bits to update
246 * @enabled_irq_mask: mask of interrupt bits to enable
248 static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
249 uint32_t interrupt_mask,
250 uint32_t enabled_irq_mask)
252 assert_spin_locked(&dev_priv->irq_lock);
254 WARN_ON(enabled_irq_mask & ~interrupt_mask);
256 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
259 dev_priv->gt_irq_mask &= ~interrupt_mask;
260 dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
261 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
265 void gen5_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
267 ilk_update_gt_irq(dev_priv, mask, mask);
270 void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
272 ilk_update_gt_irq(dev_priv, mask, 0);
275 static i915_reg_t gen6_pm_iir(struct drm_i915_private *dev_priv)
277 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR;
280 static i915_reg_t gen6_pm_imr(struct drm_i915_private *dev_priv)
282 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IMR(2) : GEN6_PMIMR;
285 static i915_reg_t gen6_pm_ier(struct drm_i915_private *dev_priv)
287 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IER(2) : GEN6_PMIER;
291 * snb_update_pm_irq - update GEN6_PMIMR
292 * @dev_priv: driver private
293 * @interrupt_mask: mask of interrupt bits to update
294 * @enabled_irq_mask: mask of interrupt bits to enable
296 static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
297 uint32_t interrupt_mask,
298 uint32_t enabled_irq_mask)
302 WARN_ON(enabled_irq_mask & ~interrupt_mask);
304 assert_spin_locked(&dev_priv->irq_lock);
306 new_val = dev_priv->pm_irq_mask;
307 new_val &= ~interrupt_mask;
308 new_val |= (~enabled_irq_mask & interrupt_mask);
310 if (new_val != dev_priv->pm_irq_mask) {
311 dev_priv->pm_irq_mask = new_val;
312 I915_WRITE(gen6_pm_imr(dev_priv), dev_priv->pm_irq_mask);
313 POSTING_READ(gen6_pm_imr(dev_priv));
317 void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
319 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
322 snb_update_pm_irq(dev_priv, mask, mask);
325 static void __gen6_disable_pm_irq(struct drm_i915_private *dev_priv,
328 snb_update_pm_irq(dev_priv, mask, 0);
331 void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
333 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
336 __gen6_disable_pm_irq(dev_priv, mask);
339 void gen6_reset_rps_interrupts(struct drm_i915_private *dev_priv)
341 i915_reg_t reg = gen6_pm_iir(dev_priv);
343 spin_lock_irq(&dev_priv->irq_lock);
344 I915_WRITE(reg, dev_priv->pm_rps_events);
345 I915_WRITE(reg, dev_priv->pm_rps_events);
347 dev_priv->rps.pm_iir = 0;
348 spin_unlock_irq(&dev_priv->irq_lock);
351 void gen6_enable_rps_interrupts(struct drm_i915_private *dev_priv)
353 spin_lock_irq(&dev_priv->irq_lock);
355 WARN_ON(dev_priv->rps.pm_iir);
356 WARN_ON(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
357 dev_priv->rps.interrupts_enabled = true;
358 I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) |
359 dev_priv->pm_rps_events);
360 gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
362 spin_unlock_irq(&dev_priv->irq_lock);
365 u32 gen6_sanitize_rps_pm_mask(struct drm_i915_private *dev_priv, u32 mask)
368 * SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer
369 * if GEN6_PM_UP_EI_EXPIRED is masked.
371 * TODO: verify if this can be reproduced on VLV,CHV.
373 if (INTEL_INFO(dev_priv)->gen <= 7 && !IS_HASWELL(dev_priv))
374 mask &= ~GEN6_PM_RP_UP_EI_EXPIRED;
376 if (INTEL_INFO(dev_priv)->gen >= 8)
377 mask &= ~GEN8_PMINTR_REDIRECT_TO_NON_DISP;
382 void gen6_disable_rps_interrupts(struct drm_i915_private *dev_priv)
384 spin_lock_irq(&dev_priv->irq_lock);
385 dev_priv->rps.interrupts_enabled = false;
386 spin_unlock_irq(&dev_priv->irq_lock);
388 cancel_work_sync(&dev_priv->rps.work);
390 spin_lock_irq(&dev_priv->irq_lock);
392 I915_WRITE(GEN6_PMINTRMSK, gen6_sanitize_rps_pm_mask(dev_priv, ~0));
394 __gen6_disable_pm_irq(dev_priv, dev_priv->pm_rps_events);
395 I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) &
396 ~dev_priv->pm_rps_events);
398 spin_unlock_irq(&dev_priv->irq_lock);
400 synchronize_irq(dev_priv->dev->irq);
404 * bdw_update_port_irq - update DE port interrupt
405 * @dev_priv: driver private
406 * @interrupt_mask: mask of interrupt bits to update
407 * @enabled_irq_mask: mask of interrupt bits to enable
409 static void bdw_update_port_irq(struct drm_i915_private *dev_priv,
410 uint32_t interrupt_mask,
411 uint32_t enabled_irq_mask)
416 assert_spin_locked(&dev_priv->irq_lock);
418 WARN_ON(enabled_irq_mask & ~interrupt_mask);
420 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
423 old_val = I915_READ(GEN8_DE_PORT_IMR);
426 new_val &= ~interrupt_mask;
427 new_val |= (~enabled_irq_mask & interrupt_mask);
429 if (new_val != old_val) {
430 I915_WRITE(GEN8_DE_PORT_IMR, new_val);
431 POSTING_READ(GEN8_DE_PORT_IMR);
436 * bdw_update_pipe_irq - update DE pipe interrupt
437 * @dev_priv: driver private
438 * @pipe: pipe whose interrupt to update
439 * @interrupt_mask: mask of interrupt bits to update
440 * @enabled_irq_mask: mask of interrupt bits to enable
442 void bdw_update_pipe_irq(struct drm_i915_private *dev_priv,
444 uint32_t interrupt_mask,
445 uint32_t enabled_irq_mask)
449 assert_spin_locked(&dev_priv->irq_lock);
451 WARN_ON(enabled_irq_mask & ~interrupt_mask);
453 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
456 new_val = dev_priv->de_irq_mask[pipe];
457 new_val &= ~interrupt_mask;
458 new_val |= (~enabled_irq_mask & interrupt_mask);
460 if (new_val != dev_priv->de_irq_mask[pipe]) {
461 dev_priv->de_irq_mask[pipe] = new_val;
462 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
463 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
468 * ibx_display_interrupt_update - update SDEIMR
469 * @dev_priv: driver private
470 * @interrupt_mask: mask of interrupt bits to update
471 * @enabled_irq_mask: mask of interrupt bits to enable
473 void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
474 uint32_t interrupt_mask,
475 uint32_t enabled_irq_mask)
477 uint32_t sdeimr = I915_READ(SDEIMR);
478 sdeimr &= ~interrupt_mask;
479 sdeimr |= (~enabled_irq_mask & interrupt_mask);
481 WARN_ON(enabled_irq_mask & ~interrupt_mask);
483 assert_spin_locked(&dev_priv->irq_lock);
485 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
488 I915_WRITE(SDEIMR, sdeimr);
489 POSTING_READ(SDEIMR);
493 __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
494 u32 enable_mask, u32 status_mask)
496 i915_reg_t reg = PIPESTAT(pipe);
497 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
499 assert_spin_locked(&dev_priv->irq_lock);
500 WARN_ON(!intel_irqs_enabled(dev_priv));
502 if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
503 status_mask & ~PIPESTAT_INT_STATUS_MASK,
504 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
505 pipe_name(pipe), enable_mask, status_mask))
508 if ((pipestat & enable_mask) == enable_mask)
511 dev_priv->pipestat_irq_mask[pipe] |= status_mask;
513 /* Enable the interrupt, clear any pending status */
514 pipestat |= enable_mask | status_mask;
515 I915_WRITE(reg, pipestat);
520 __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
521 u32 enable_mask, u32 status_mask)
523 i915_reg_t reg = PIPESTAT(pipe);
524 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
526 assert_spin_locked(&dev_priv->irq_lock);
527 WARN_ON(!intel_irqs_enabled(dev_priv));
529 if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
530 status_mask & ~PIPESTAT_INT_STATUS_MASK,
531 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
532 pipe_name(pipe), enable_mask, status_mask))
535 if ((pipestat & enable_mask) == 0)
538 dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
540 pipestat &= ~enable_mask;
541 I915_WRITE(reg, pipestat);
545 static u32 vlv_get_pipestat_enable_mask(struct drm_device *dev, u32 status_mask)
547 u32 enable_mask = status_mask << 16;
550 * On pipe A we don't support the PSR interrupt yet,
551 * on pipe B and C the same bit MBZ.
553 if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV))
556 * On pipe B and C we don't support the PSR interrupt yet, on pipe
557 * A the same bit is for perf counters which we don't use either.
559 if (WARN_ON_ONCE(status_mask & PIPE_B_PSR_STATUS_VLV))
562 enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
563 SPRITE0_FLIP_DONE_INT_EN_VLV |
564 SPRITE1_FLIP_DONE_INT_EN_VLV);
565 if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
566 enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
567 if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
568 enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;
574 i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
579 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
580 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
583 enable_mask = status_mask << 16;
584 __i915_enable_pipestat(dev_priv, pipe, enable_mask, status_mask);
588 i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
593 if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
594 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
597 enable_mask = status_mask << 16;
598 __i915_disable_pipestat(dev_priv, pipe, enable_mask, status_mask);
602 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
605 static void i915_enable_asle_pipestat(struct drm_i915_private *dev_priv)
607 if (!dev_priv->opregion.asle || !IS_MOBILE(dev_priv))
610 spin_lock_irq(&dev_priv->irq_lock);
612 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
613 if (INTEL_GEN(dev_priv) >= 4)
614 i915_enable_pipestat(dev_priv, PIPE_A,
615 PIPE_LEGACY_BLC_EVENT_STATUS);
617 spin_unlock_irq(&dev_priv->irq_lock);
621 * This timing diagram depicts the video signal in and
622 * around the vertical blanking period.
624 * Assumptions about the fictitious mode used in this example:
626 * vsync_start = vblank_start + 1
627 * vsync_end = vblank_start + 2
628 * vtotal = vblank_start + 3
631 * latch double buffered registers
632 * increment frame counter (ctg+)
633 * generate start of vblank interrupt (gen4+)
636 * | generate frame start interrupt (aka. vblank interrupt) (gmch)
637 * | may be shifted forward 1-3 extra lines via PIPECONF
639 * | | start of vsync:
640 * | | generate vsync interrupt
642 * ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx
643 * . \hs/ . \hs/ \hs/ \hs/ . \hs/
644 * ----va---> <-----------------vb--------------------> <--------va-------------
645 * | | <----vs-----> |
646 * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
647 * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
648 * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
650 * last visible pixel first visible pixel
651 * | increment frame counter (gen3/4)
652 * pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4)
654 * x = horizontal active
655 * _ = horizontal blanking
656 * hs = horizontal sync
657 * va = vertical active
658 * vb = vertical blanking
660 * vbs = vblank_start (number)
663 * - most events happen at the start of horizontal sync
664 * - frame start happens at the start of horizontal blank, 1-4 lines
665 * (depending on PIPECONF settings) after the start of vblank
666 * - gen3/4 pixel and frame counter are synchronized with the start
667 * of horizontal active on the first line of vertical active
670 static u32 i8xx_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
672 /* Gen2 doesn't have a hardware frame counter */
676 /* Called from drm generic code, passed a 'crtc', which
677 * we use as a pipe index
679 static u32 i915_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
681 struct drm_i915_private *dev_priv = dev->dev_private;
682 i915_reg_t high_frame, low_frame;
683 u32 high1, high2, low, pixel, vbl_start, hsync_start, htotal;
684 struct intel_crtc *intel_crtc =
685 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
686 const struct drm_display_mode *mode = &intel_crtc->base.hwmode;
688 htotal = mode->crtc_htotal;
689 hsync_start = mode->crtc_hsync_start;
690 vbl_start = mode->crtc_vblank_start;
691 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
692 vbl_start = DIV_ROUND_UP(vbl_start, 2);
694 /* Convert to pixel count */
697 /* Start of vblank event occurs at start of hsync */
698 vbl_start -= htotal - hsync_start;
700 high_frame = PIPEFRAME(pipe);
701 low_frame = PIPEFRAMEPIXEL(pipe);
704 * High & low register fields aren't synchronized, so make sure
705 * we get a low value that's stable across two reads of the high
709 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
710 low = I915_READ(low_frame);
711 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
712 } while (high1 != high2);
714 high1 >>= PIPE_FRAME_HIGH_SHIFT;
715 pixel = low & PIPE_PIXEL_MASK;
716 low >>= PIPE_FRAME_LOW_SHIFT;
719 * The frame counter increments at beginning of active.
720 * Cook up a vblank counter by also checking the pixel
721 * counter against vblank start.
723 return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
726 static u32 g4x_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
728 struct drm_i915_private *dev_priv = dev->dev_private;
730 return I915_READ(PIPE_FRMCOUNT_G4X(pipe));
733 /* I915_READ_FW, only for fast reads of display block, no need for forcewake etc. */
734 static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
736 struct drm_device *dev = crtc->base.dev;
737 struct drm_i915_private *dev_priv = dev->dev_private;
738 const struct drm_display_mode *mode = &crtc->base.hwmode;
739 enum pipe pipe = crtc->pipe;
740 int position, vtotal;
742 vtotal = mode->crtc_vtotal;
743 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
746 if (IS_GEN2(dev_priv))
747 position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
749 position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
752 * On HSW, the DSL reg (0x70000) appears to return 0 if we
753 * read it just before the start of vblank. So try it again
754 * so we don't accidentally end up spanning a vblank frame
755 * increment, causing the pipe_update_end() code to squak at us.
757 * The nature of this problem means we can't simply check the ISR
758 * bit and return the vblank start value; nor can we use the scanline
759 * debug register in the transcoder as it appears to have the same
760 * problem. We may need to extend this to include other platforms,
761 * but so far testing only shows the problem on HSW.
763 if (HAS_DDI(dev_priv) && !position) {
766 for (i = 0; i < 100; i++) {
768 temp = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) &
770 if (temp != position) {
778 * See update_scanline_offset() for the details on the
779 * scanline_offset adjustment.
781 return (position + crtc->scanline_offset) % vtotal;
784 static int i915_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
785 unsigned int flags, int *vpos, int *hpos,
786 ktime_t *stime, ktime_t *etime,
787 const struct drm_display_mode *mode)
789 struct drm_i915_private *dev_priv = dev->dev_private;
790 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
791 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
793 int vbl_start, vbl_end, hsync_start, htotal, vtotal;
796 unsigned long irqflags;
798 if (WARN_ON(!mode->crtc_clock)) {
799 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
800 "pipe %c\n", pipe_name(pipe));
804 htotal = mode->crtc_htotal;
805 hsync_start = mode->crtc_hsync_start;
806 vtotal = mode->crtc_vtotal;
807 vbl_start = mode->crtc_vblank_start;
808 vbl_end = mode->crtc_vblank_end;
810 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
811 vbl_start = DIV_ROUND_UP(vbl_start, 2);
816 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
819 * Lock uncore.lock, as we will do multiple timing critical raw
820 * register reads, potentially with preemption disabled, so the
821 * following code must not block on uncore.lock.
823 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
825 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
827 /* Get optional system timestamp before query. */
829 *stime = ktime_get();
831 if (IS_GEN2(dev_priv) || IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
832 /* No obvious pixelcount register. Only query vertical
833 * scanout position from Display scan line register.
835 position = __intel_get_crtc_scanline(intel_crtc);
837 /* Have access to pixelcount since start of frame.
838 * We can split this into vertical and horizontal
841 position = (I915_READ_FW(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
843 /* convert to pixel counts */
849 * In interlaced modes, the pixel counter counts all pixels,
850 * so one field will have htotal more pixels. In order to avoid
851 * the reported position from jumping backwards when the pixel
852 * counter is beyond the length of the shorter field, just
853 * clamp the position the length of the shorter field. This
854 * matches how the scanline counter based position works since
855 * the scanline counter doesn't count the two half lines.
857 if (position >= vtotal)
858 position = vtotal - 1;
861 * Start of vblank interrupt is triggered at start of hsync,
862 * just prior to the first active line of vblank. However we
863 * consider lines to start at the leading edge of horizontal
864 * active. So, should we get here before we've crossed into
865 * the horizontal active of the first line in vblank, we would
866 * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
867 * always add htotal-hsync_start to the current pixel position.
869 position = (position + htotal - hsync_start) % vtotal;
872 /* Get optional system timestamp after query. */
874 *etime = ktime_get();
876 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
878 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
880 in_vbl = position >= vbl_start && position < vbl_end;
883 * While in vblank, position will be negative
884 * counting up towards 0 at vbl_end. And outside
885 * vblank, position will be positive counting
888 if (position >= vbl_start)
891 position += vtotal - vbl_end;
893 if (IS_GEN2(dev_priv) || IS_G4X(dev_priv) || INTEL_GEN(dev_priv) >= 5) {
897 *vpos = position / htotal;
898 *hpos = position - (*vpos * htotal);
903 ret |= DRM_SCANOUTPOS_IN_VBLANK;
908 int intel_get_crtc_scanline(struct intel_crtc *crtc)
910 struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
911 unsigned long irqflags;
914 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
915 position = __intel_get_crtc_scanline(crtc);
916 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
921 static int i915_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
923 struct timeval *vblank_time,
926 struct drm_crtc *crtc;
928 if (pipe >= INTEL_INFO(dev)->num_pipes) {
929 DRM_ERROR("Invalid crtc %u\n", pipe);
933 /* Get drm_crtc to timestamp: */
934 crtc = intel_get_crtc_for_pipe(dev, pipe);
936 DRM_ERROR("Invalid crtc %u\n", pipe);
940 if (!crtc->hwmode.crtc_clock) {
941 DRM_DEBUG_KMS("crtc %u is disabled\n", pipe);
945 /* Helper routine in DRM core does all the work: */
946 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
951 static void ironlake_rps_change_irq_handler(struct drm_i915_private *dev_priv)
953 u32 busy_up, busy_down, max_avg, min_avg;
956 spin_lock(&mchdev_lock);
958 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
960 new_delay = dev_priv->ips.cur_delay;
962 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
963 busy_up = I915_READ(RCPREVBSYTUPAVG);
964 busy_down = I915_READ(RCPREVBSYTDNAVG);
965 max_avg = I915_READ(RCBMAXAVG);
966 min_avg = I915_READ(RCBMINAVG);
968 /* Handle RCS change request from hw */
969 if (busy_up > max_avg) {
970 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
971 new_delay = dev_priv->ips.cur_delay - 1;
972 if (new_delay < dev_priv->ips.max_delay)
973 new_delay = dev_priv->ips.max_delay;
974 } else if (busy_down < min_avg) {
975 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
976 new_delay = dev_priv->ips.cur_delay + 1;
977 if (new_delay > dev_priv->ips.min_delay)
978 new_delay = dev_priv->ips.min_delay;
981 if (ironlake_set_drps(dev_priv, new_delay))
982 dev_priv->ips.cur_delay = new_delay;
984 spin_unlock(&mchdev_lock);
989 static void notify_ring(struct intel_engine_cs *engine)
991 if (!intel_engine_initialized(engine))
994 trace_i915_gem_request_notify(engine);
995 engine->user_interrupts++;
997 wake_up_all(&engine->irq_queue);
1000 static void vlv_c0_read(struct drm_i915_private *dev_priv,
1001 struct intel_rps_ei *ei)
1003 ei->cz_clock = vlv_punit_read(dev_priv, PUNIT_REG_CZ_TIMESTAMP);
1004 ei->render_c0 = I915_READ(VLV_RENDER_C0_COUNT);
1005 ei->media_c0 = I915_READ(VLV_MEDIA_C0_COUNT);
1008 static bool vlv_c0_above(struct drm_i915_private *dev_priv,
1009 const struct intel_rps_ei *old,
1010 const struct intel_rps_ei *now,
1014 unsigned int mul = 100;
1016 if (old->cz_clock == 0)
1019 if (I915_READ(VLV_COUNTER_CONTROL) & VLV_COUNT_RANGE_HIGH)
1022 time = now->cz_clock - old->cz_clock;
1023 time *= threshold * dev_priv->czclk_freq;
1025 /* Workload can be split between render + media, e.g. SwapBuffers
1026 * being blitted in X after being rendered in mesa. To account for
1027 * this we need to combine both engines into our activity counter.
1029 c0 = now->render_c0 - old->render_c0;
1030 c0 += now->media_c0 - old->media_c0;
1031 c0 *= mul * VLV_CZ_CLOCK_TO_MILLI_SEC;
1036 void gen6_rps_reset_ei(struct drm_i915_private *dev_priv)
1038 vlv_c0_read(dev_priv, &dev_priv->rps.down_ei);
1039 dev_priv->rps.up_ei = dev_priv->rps.down_ei;
1042 static u32 vlv_wa_c0_ei(struct drm_i915_private *dev_priv, u32 pm_iir)
1044 struct intel_rps_ei now;
1047 if ((pm_iir & (GEN6_PM_RP_DOWN_EI_EXPIRED | GEN6_PM_RP_UP_EI_EXPIRED)) == 0)
1050 vlv_c0_read(dev_priv, &now);
1051 if (now.cz_clock == 0)
1054 if (pm_iir & GEN6_PM_RP_DOWN_EI_EXPIRED) {
1055 if (!vlv_c0_above(dev_priv,
1056 &dev_priv->rps.down_ei, &now,
1057 dev_priv->rps.down_threshold))
1058 events |= GEN6_PM_RP_DOWN_THRESHOLD;
1059 dev_priv->rps.down_ei = now;
1062 if (pm_iir & GEN6_PM_RP_UP_EI_EXPIRED) {
1063 if (vlv_c0_above(dev_priv,
1064 &dev_priv->rps.up_ei, &now,
1065 dev_priv->rps.up_threshold))
1066 events |= GEN6_PM_RP_UP_THRESHOLD;
1067 dev_priv->rps.up_ei = now;
1073 static bool any_waiters(struct drm_i915_private *dev_priv)
1075 struct intel_engine_cs *engine;
1077 for_each_engine(engine, dev_priv)
1078 if (engine->irq_refcount)
1084 static void gen6_pm_rps_work(struct work_struct *work)
1086 struct drm_i915_private *dev_priv =
1087 container_of(work, struct drm_i915_private, rps.work);
1089 int new_delay, adj, min, max;
1092 spin_lock_irq(&dev_priv->irq_lock);
1093 /* Speed up work cancelation during disabling rps interrupts. */
1094 if (!dev_priv->rps.interrupts_enabled) {
1095 spin_unlock_irq(&dev_priv->irq_lock);
1100 * The RPS work is synced during runtime suspend, we don't require a
1101 * wakeref. TODO: instead of disabling the asserts make sure that we
1102 * always hold an RPM reference while the work is running.
1104 DISABLE_RPM_WAKEREF_ASSERTS(dev_priv);
1106 pm_iir = dev_priv->rps.pm_iir;
1107 dev_priv->rps.pm_iir = 0;
1108 /* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
1109 gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
1110 client_boost = dev_priv->rps.client_boost;
1111 dev_priv->rps.client_boost = false;
1112 spin_unlock_irq(&dev_priv->irq_lock);
1114 /* Make sure we didn't queue anything we're not going to process. */
1115 WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
1117 if ((pm_iir & dev_priv->pm_rps_events) == 0 && !client_boost)
1120 mutex_lock(&dev_priv->rps.hw_lock);
1122 pm_iir |= vlv_wa_c0_ei(dev_priv, pm_iir);
1124 adj = dev_priv->rps.last_adj;
1125 new_delay = dev_priv->rps.cur_freq;
1126 min = dev_priv->rps.min_freq_softlimit;
1127 max = dev_priv->rps.max_freq_softlimit;
1130 new_delay = dev_priv->rps.max_freq_softlimit;
1132 } else if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
1135 else /* CHV needs even encode values */
1136 adj = IS_CHERRYVIEW(dev_priv) ? 2 : 1;
1138 * For better performance, jump directly
1139 * to RPe if we're below it.
1141 if (new_delay < dev_priv->rps.efficient_freq - adj) {
1142 new_delay = dev_priv->rps.efficient_freq;
1145 } else if (any_waiters(dev_priv)) {
1147 } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
1148 if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq)
1149 new_delay = dev_priv->rps.efficient_freq;
1151 new_delay = dev_priv->rps.min_freq_softlimit;
1153 } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {
1156 else /* CHV needs even encode values */
1157 adj = IS_CHERRYVIEW(dev_priv) ? -2 : -1;
1158 } else { /* unknown event */
1162 dev_priv->rps.last_adj = adj;
1164 /* sysfs frequency interfaces may have snuck in while servicing the
1168 new_delay = clamp_t(int, new_delay, min, max);
1170 intel_set_rps(dev_priv, new_delay);
1172 mutex_unlock(&dev_priv->rps.hw_lock);
1174 ENABLE_RPM_WAKEREF_ASSERTS(dev_priv);
1179 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1181 * @work: workqueue struct
1183 * Doesn't actually do anything except notify userspace. As a consequence of
1184 * this event, userspace should try to remap the bad rows since statistically
1185 * it is likely the same row is more likely to go bad again.
1187 static void ivybridge_parity_work(struct work_struct *work)
1189 struct drm_i915_private *dev_priv =
1190 container_of(work, struct drm_i915_private, l3_parity.error_work);
1191 u32 error_status, row, bank, subbank;
1192 char *parity_event[6];
1196 /* We must turn off DOP level clock gating to access the L3 registers.
1197 * In order to prevent a get/put style interface, acquire struct mutex
1198 * any time we access those registers.
1200 mutex_lock(&dev_priv->dev->struct_mutex);
1202 /* If we've screwed up tracking, just let the interrupt fire again */
1203 if (WARN_ON(!dev_priv->l3_parity.which_slice))
1206 misccpctl = I915_READ(GEN7_MISCCPCTL);
1207 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
1208 POSTING_READ(GEN7_MISCCPCTL);
1210 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
1214 if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv)))
1217 dev_priv->l3_parity.which_slice &= ~(1<<slice);
1219 reg = GEN7_L3CDERRST1(slice);
1221 error_status = I915_READ(reg);
1222 row = GEN7_PARITY_ERROR_ROW(error_status);
1223 bank = GEN7_PARITY_ERROR_BANK(error_status);
1224 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
1226 I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
1229 parity_event[0] = I915_L3_PARITY_UEVENT "=1";
1230 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
1231 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
1232 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
1233 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice);
1234 parity_event[5] = NULL;
1236 kobject_uevent_env(&dev_priv->dev->primary->kdev->kobj,
1237 KOBJ_CHANGE, parity_event);
1239 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1240 slice, row, bank, subbank);
1242 kfree(parity_event[4]);
1243 kfree(parity_event[3]);
1244 kfree(parity_event[2]);
1245 kfree(parity_event[1]);
1248 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
1251 WARN_ON(dev_priv->l3_parity.which_slice);
1252 spin_lock_irq(&dev_priv->irq_lock);
1253 gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
1254 spin_unlock_irq(&dev_priv->irq_lock);
1256 mutex_unlock(&dev_priv->dev->struct_mutex);
1259 static void ivybridge_parity_error_irq_handler(struct drm_i915_private *dev_priv,
1262 if (!HAS_L3_DPF(dev_priv))
1265 spin_lock(&dev_priv->irq_lock);
1266 gen5_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
1267 spin_unlock(&dev_priv->irq_lock);
1269 iir &= GT_PARITY_ERROR(dev_priv);
1270 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
1271 dev_priv->l3_parity.which_slice |= 1 << 1;
1273 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
1274 dev_priv->l3_parity.which_slice |= 1 << 0;
1276 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
1279 static void ilk_gt_irq_handler(struct drm_i915_private *dev_priv,
1283 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1284 notify_ring(&dev_priv->engine[RCS]);
1285 if (gt_iir & ILK_BSD_USER_INTERRUPT)
1286 notify_ring(&dev_priv->engine[VCS]);
1289 static void snb_gt_irq_handler(struct drm_i915_private *dev_priv,
1294 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1295 notify_ring(&dev_priv->engine[RCS]);
1296 if (gt_iir & GT_BSD_USER_INTERRUPT)
1297 notify_ring(&dev_priv->engine[VCS]);
1298 if (gt_iir & GT_BLT_USER_INTERRUPT)
1299 notify_ring(&dev_priv->engine[BCS]);
1301 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
1302 GT_BSD_CS_ERROR_INTERRUPT |
1303 GT_RENDER_CS_MASTER_ERROR_INTERRUPT))
1304 DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir);
1306 if (gt_iir & GT_PARITY_ERROR(dev_priv))
1307 ivybridge_parity_error_irq_handler(dev_priv, gt_iir);
1310 static __always_inline void
1311 gen8_cs_irq_handler(struct intel_engine_cs *engine, u32 iir, int test_shift)
1313 if (iir & (GT_RENDER_USER_INTERRUPT << test_shift))
1314 notify_ring(engine);
1315 if (iir & (GT_CONTEXT_SWITCH_INTERRUPT << test_shift))
1316 tasklet_schedule(&engine->irq_tasklet);
1319 static irqreturn_t gen8_gt_irq_ack(struct drm_i915_private *dev_priv,
1323 irqreturn_t ret = IRQ_NONE;
1325 if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
1326 gt_iir[0] = I915_READ_FW(GEN8_GT_IIR(0));
1328 I915_WRITE_FW(GEN8_GT_IIR(0), gt_iir[0]);
1331 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1334 if (master_ctl & (GEN8_GT_VCS1_IRQ | GEN8_GT_VCS2_IRQ)) {
1335 gt_iir[1] = I915_READ_FW(GEN8_GT_IIR(1));
1337 I915_WRITE_FW(GEN8_GT_IIR(1), gt_iir[1]);
1340 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1343 if (master_ctl & GEN8_GT_VECS_IRQ) {
1344 gt_iir[3] = I915_READ_FW(GEN8_GT_IIR(3));
1346 I915_WRITE_FW(GEN8_GT_IIR(3), gt_iir[3]);
1349 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1352 if (master_ctl & GEN8_GT_PM_IRQ) {
1353 gt_iir[2] = I915_READ_FW(GEN8_GT_IIR(2));
1354 if (gt_iir[2] & dev_priv->pm_rps_events) {
1355 I915_WRITE_FW(GEN8_GT_IIR(2),
1356 gt_iir[2] & dev_priv->pm_rps_events);
1359 DRM_ERROR("The master control interrupt lied (PM)!\n");
1365 static void gen8_gt_irq_handler(struct drm_i915_private *dev_priv,
1369 gen8_cs_irq_handler(&dev_priv->engine[RCS],
1370 gt_iir[0], GEN8_RCS_IRQ_SHIFT);
1371 gen8_cs_irq_handler(&dev_priv->engine[BCS],
1372 gt_iir[0], GEN8_BCS_IRQ_SHIFT);
1376 gen8_cs_irq_handler(&dev_priv->engine[VCS],
1377 gt_iir[1], GEN8_VCS1_IRQ_SHIFT);
1378 gen8_cs_irq_handler(&dev_priv->engine[VCS2],
1379 gt_iir[1], GEN8_VCS2_IRQ_SHIFT);
1383 gen8_cs_irq_handler(&dev_priv->engine[VECS],
1384 gt_iir[3], GEN8_VECS_IRQ_SHIFT);
1386 if (gt_iir[2] & dev_priv->pm_rps_events)
1387 gen6_rps_irq_handler(dev_priv, gt_iir[2]);
1390 static bool bxt_port_hotplug_long_detect(enum port port, u32 val)
1394 return val & PORTA_HOTPLUG_LONG_DETECT;
1396 return val & PORTB_HOTPLUG_LONG_DETECT;
1398 return val & PORTC_HOTPLUG_LONG_DETECT;
1404 static bool spt_port_hotplug2_long_detect(enum port port, u32 val)
1408 return val & PORTE_HOTPLUG_LONG_DETECT;
1414 static bool spt_port_hotplug_long_detect(enum port port, u32 val)
1418 return val & PORTA_HOTPLUG_LONG_DETECT;
1420 return val & PORTB_HOTPLUG_LONG_DETECT;
1422 return val & PORTC_HOTPLUG_LONG_DETECT;
1424 return val & PORTD_HOTPLUG_LONG_DETECT;
1430 static bool ilk_port_hotplug_long_detect(enum port port, u32 val)
1434 return val & DIGITAL_PORTA_HOTPLUG_LONG_DETECT;
1440 static bool pch_port_hotplug_long_detect(enum port port, u32 val)
1444 return val & PORTB_HOTPLUG_LONG_DETECT;
1446 return val & PORTC_HOTPLUG_LONG_DETECT;
1448 return val & PORTD_HOTPLUG_LONG_DETECT;
1454 static bool i9xx_port_hotplug_long_detect(enum port port, u32 val)
1458 return val & PORTB_HOTPLUG_INT_LONG_PULSE;
1460 return val & PORTC_HOTPLUG_INT_LONG_PULSE;
1462 return val & PORTD_HOTPLUG_INT_LONG_PULSE;
1469 * Get a bit mask of pins that have triggered, and which ones may be long.
1470 * This can be called multiple times with the same masks to accumulate
1471 * hotplug detection results from several registers.
1473 * Note that the caller is expected to zero out the masks initially.
1475 static void intel_get_hpd_pins(u32 *pin_mask, u32 *long_mask,
1476 u32 hotplug_trigger, u32 dig_hotplug_reg,
1477 const u32 hpd[HPD_NUM_PINS],
1478 bool long_pulse_detect(enum port port, u32 val))
1483 for_each_hpd_pin(i) {
1484 if ((hpd[i] & hotplug_trigger) == 0)
1487 *pin_mask |= BIT(i);
1489 if (!intel_hpd_pin_to_port(i, &port))
1492 if (long_pulse_detect(port, dig_hotplug_reg))
1493 *long_mask |= BIT(i);
1496 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x, dig 0x%08x, pins 0x%08x\n",
1497 hotplug_trigger, dig_hotplug_reg, *pin_mask);
1501 static void gmbus_irq_handler(struct drm_i915_private *dev_priv)
1503 wake_up_all(&dev_priv->gmbus_wait_queue);
1506 static void dp_aux_irq_handler(struct drm_i915_private *dev_priv)
1508 wake_up_all(&dev_priv->gmbus_wait_queue);
1511 #if defined(CONFIG_DEBUG_FS)
1512 static void display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1514 uint32_t crc0, uint32_t crc1,
1515 uint32_t crc2, uint32_t crc3,
1518 struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
1519 struct intel_pipe_crc_entry *entry;
1522 spin_lock(&pipe_crc->lock);
1524 if (!pipe_crc->entries) {
1525 spin_unlock(&pipe_crc->lock);
1526 DRM_DEBUG_KMS("spurious interrupt\n");
1530 head = pipe_crc->head;
1531 tail = pipe_crc->tail;
1533 if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) {
1534 spin_unlock(&pipe_crc->lock);
1535 DRM_ERROR("CRC buffer overflowing\n");
1539 entry = &pipe_crc->entries[head];
1541 entry->frame = dev_priv->dev->driver->get_vblank_counter(dev_priv->dev,
1543 entry->crc[0] = crc0;
1544 entry->crc[1] = crc1;
1545 entry->crc[2] = crc2;
1546 entry->crc[3] = crc3;
1547 entry->crc[4] = crc4;
1549 head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1);
1550 pipe_crc->head = head;
1552 spin_unlock(&pipe_crc->lock);
1554 wake_up_interruptible(&pipe_crc->wq);
1558 display_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1560 uint32_t crc0, uint32_t crc1,
1561 uint32_t crc2, uint32_t crc3,
1566 static void hsw_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1569 display_pipe_crc_irq_handler(dev_priv, pipe,
1570 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1574 static void ivb_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1577 display_pipe_crc_irq_handler(dev_priv, pipe,
1578 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1579 I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
1580 I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
1581 I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
1582 I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
1585 static void i9xx_pipe_crc_irq_handler(struct drm_i915_private *dev_priv,
1588 uint32_t res1, res2;
1590 if (INTEL_GEN(dev_priv) >= 3)
1591 res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
1595 if (INTEL_GEN(dev_priv) >= 5 || IS_G4X(dev_priv))
1596 res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
1600 display_pipe_crc_irq_handler(dev_priv, pipe,
1601 I915_READ(PIPE_CRC_RES_RED(pipe)),
1602 I915_READ(PIPE_CRC_RES_GREEN(pipe)),
1603 I915_READ(PIPE_CRC_RES_BLUE(pipe)),
1607 /* The RPS events need forcewake, so we add them to a work queue and mask their
1608 * IMR bits until the work is done. Other interrupts can be processed without
1609 * the work queue. */
1610 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
1612 if (pm_iir & dev_priv->pm_rps_events) {
1613 spin_lock(&dev_priv->irq_lock);
1614 gen6_disable_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
1615 if (dev_priv->rps.interrupts_enabled) {
1616 dev_priv->rps.pm_iir |= pm_iir & dev_priv->pm_rps_events;
1617 queue_work(dev_priv->wq, &dev_priv->rps.work);
1619 spin_unlock(&dev_priv->irq_lock);
1622 if (INTEL_INFO(dev_priv)->gen >= 8)
1625 if (HAS_VEBOX(dev_priv)) {
1626 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
1627 notify_ring(&dev_priv->engine[VECS]);
1629 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT)
1630 DRM_DEBUG("Command parser error, pm_iir 0x%08x\n", pm_iir);
1634 static bool intel_pipe_handle_vblank(struct drm_i915_private *dev_priv,
1639 ret = drm_handle_vblank(dev_priv->dev, pipe);
1641 intel_finish_page_flip_mmio(dev_priv, pipe);
1646 static void valleyview_pipestat_irq_ack(struct drm_i915_private *dev_priv,
1647 u32 iir, u32 pipe_stats[I915_MAX_PIPES])
1651 spin_lock(&dev_priv->irq_lock);
1653 if (!dev_priv->display_irqs_enabled) {
1654 spin_unlock(&dev_priv->irq_lock);
1658 for_each_pipe(dev_priv, pipe) {
1660 u32 mask, iir_bit = 0;
1663 * PIPESTAT bits get signalled even when the interrupt is
1664 * disabled with the mask bits, and some of the status bits do
1665 * not generate interrupts at all (like the underrun bit). Hence
1666 * we need to be careful that we only handle what we want to
1670 /* fifo underruns are filterered in the underrun handler. */
1671 mask = PIPE_FIFO_UNDERRUN_STATUS;
1675 iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
1678 iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
1681 iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
1685 mask |= dev_priv->pipestat_irq_mask[pipe];
1690 reg = PIPESTAT(pipe);
1691 mask |= PIPESTAT_INT_ENABLE_MASK;
1692 pipe_stats[pipe] = I915_READ(reg) & mask;
1695 * Clear the PIPE*STAT regs before the IIR
1697 if (pipe_stats[pipe] & (PIPE_FIFO_UNDERRUN_STATUS |
1698 PIPESTAT_INT_STATUS_MASK))
1699 I915_WRITE(reg, pipe_stats[pipe]);
1701 spin_unlock(&dev_priv->irq_lock);
1704 static void valleyview_pipestat_irq_handler(struct drm_i915_private *dev_priv,
1705 u32 pipe_stats[I915_MAX_PIPES])
1709 for_each_pipe(dev_priv, pipe) {
1710 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
1711 intel_pipe_handle_vblank(dev_priv, pipe))
1712 intel_check_page_flip(dev_priv, pipe);
1714 if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV)
1715 intel_finish_page_flip_cs(dev_priv, pipe);
1717 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1718 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
1720 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1721 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1724 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1725 gmbus_irq_handler(dev_priv);
1728 static u32 i9xx_hpd_irq_ack(struct drm_i915_private *dev_priv)
1730 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1733 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1735 return hotplug_status;
1738 static void i9xx_hpd_irq_handler(struct drm_i915_private *dev_priv,
1741 u32 pin_mask = 0, long_mask = 0;
1743 if (IS_G4X(dev_priv) || IS_VALLEYVIEW(dev_priv) ||
1744 IS_CHERRYVIEW(dev_priv)) {
1745 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X;
1747 if (hotplug_trigger) {
1748 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
1749 hotplug_trigger, hpd_status_g4x,
1750 i9xx_port_hotplug_long_detect);
1752 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
1755 if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
1756 dp_aux_irq_handler(dev_priv);
1758 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1760 if (hotplug_trigger) {
1761 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
1762 hotplug_trigger, hpd_status_i915,
1763 i9xx_port_hotplug_long_detect);
1764 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
1769 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
1771 struct drm_device *dev = arg;
1772 struct drm_i915_private *dev_priv = dev->dev_private;
1773 irqreturn_t ret = IRQ_NONE;
1775 if (!intel_irqs_enabled(dev_priv))
1778 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
1779 disable_rpm_wakeref_asserts(dev_priv);
1782 u32 iir, gt_iir, pm_iir;
1783 u32 pipe_stats[I915_MAX_PIPES] = {};
1784 u32 hotplug_status = 0;
1787 gt_iir = I915_READ(GTIIR);
1788 pm_iir = I915_READ(GEN6_PMIIR);
1789 iir = I915_READ(VLV_IIR);
1791 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
1797 * Theory on interrupt generation, based on empirical evidence:
1799 * x = ((VLV_IIR & VLV_IER) ||
1800 * (((GT_IIR & GT_IER) || (GEN6_PMIIR & GEN6_PMIER)) &&
1801 * (VLV_MASTER_IER & MASTER_INTERRUPT_ENABLE)));
1803 * A CPU interrupt will only be raised when 'x' has a 0->1 edge.
1804 * Hence we clear MASTER_INTERRUPT_ENABLE and VLV_IER to
1805 * guarantee the CPU interrupt will be raised again even if we
1806 * don't end up clearing all the VLV_IIR, GT_IIR, GEN6_PMIIR
1807 * bits this time around.
1809 I915_WRITE(VLV_MASTER_IER, 0);
1810 ier = I915_READ(VLV_IER);
1811 I915_WRITE(VLV_IER, 0);
1814 I915_WRITE(GTIIR, gt_iir);
1816 I915_WRITE(GEN6_PMIIR, pm_iir);
1818 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1819 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
1821 /* Call regardless, as some status bits might not be
1822 * signalled in iir */
1823 valleyview_pipestat_irq_ack(dev_priv, iir, pipe_stats);
1826 * VLV_IIR is single buffered, and reflects the level
1827 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
1830 I915_WRITE(VLV_IIR, iir);
1832 I915_WRITE(VLV_IER, ier);
1833 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
1834 POSTING_READ(VLV_MASTER_IER);
1837 snb_gt_irq_handler(dev_priv, gt_iir);
1839 gen6_rps_irq_handler(dev_priv, pm_iir);
1842 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
1844 valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
1847 enable_rpm_wakeref_asserts(dev_priv);
1852 static irqreturn_t cherryview_irq_handler(int irq, void *arg)
1854 struct drm_device *dev = arg;
1855 struct drm_i915_private *dev_priv = dev->dev_private;
1856 irqreturn_t ret = IRQ_NONE;
1858 if (!intel_irqs_enabled(dev_priv))
1861 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
1862 disable_rpm_wakeref_asserts(dev_priv);
1865 u32 master_ctl, iir;
1867 u32 pipe_stats[I915_MAX_PIPES] = {};
1868 u32 hotplug_status = 0;
1871 master_ctl = I915_READ(GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL;
1872 iir = I915_READ(VLV_IIR);
1874 if (master_ctl == 0 && iir == 0)
1880 * Theory on interrupt generation, based on empirical evidence:
1882 * x = ((VLV_IIR & VLV_IER) ||
1883 * ((GEN8_MASTER_IRQ & ~GEN8_MASTER_IRQ_CONTROL) &&
1884 * (GEN8_MASTER_IRQ & GEN8_MASTER_IRQ_CONTROL)));
1886 * A CPU interrupt will only be raised when 'x' has a 0->1 edge.
1887 * Hence we clear GEN8_MASTER_IRQ_CONTROL and VLV_IER to
1888 * guarantee the CPU interrupt will be raised again even if we
1889 * don't end up clearing all the VLV_IIR and GEN8_MASTER_IRQ_CONTROL
1890 * bits this time around.
1892 I915_WRITE(GEN8_MASTER_IRQ, 0);
1893 ier = I915_READ(VLV_IER);
1894 I915_WRITE(VLV_IER, 0);
1896 gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
1898 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1899 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
1901 /* Call regardless, as some status bits might not be
1902 * signalled in iir */
1903 valleyview_pipestat_irq_ack(dev_priv, iir, pipe_stats);
1906 * VLV_IIR is single buffered, and reflects the level
1907 * from PIPESTAT/PORT_HOTPLUG_STAT, hence clear it last.
1910 I915_WRITE(VLV_IIR, iir);
1912 I915_WRITE(VLV_IER, ier);
1913 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
1914 POSTING_READ(GEN8_MASTER_IRQ);
1916 gen8_gt_irq_handler(dev_priv, gt_iir);
1919 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
1921 valleyview_pipestat_irq_handler(dev_priv, pipe_stats);
1924 enable_rpm_wakeref_asserts(dev_priv);
1929 static void ibx_hpd_irq_handler(struct drm_i915_private *dev_priv,
1930 u32 hotplug_trigger,
1931 const u32 hpd[HPD_NUM_PINS])
1933 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
1936 * Somehow the PCH doesn't seem to really ack the interrupt to the CPU
1937 * unless we touch the hotplug register, even if hotplug_trigger is
1938 * zero. Not acking leads to "The master control interrupt lied (SDE)!"
1941 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
1942 if (!hotplug_trigger) {
1943 u32 mask = PORTA_HOTPLUG_STATUS_MASK |
1944 PORTD_HOTPLUG_STATUS_MASK |
1945 PORTC_HOTPLUG_STATUS_MASK |
1946 PORTB_HOTPLUG_STATUS_MASK;
1947 dig_hotplug_reg &= ~mask;
1950 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
1951 if (!hotplug_trigger)
1954 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
1955 dig_hotplug_reg, hpd,
1956 pch_port_hotplug_long_detect);
1958 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
1961 static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
1964 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1966 ibx_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ibx);
1968 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1969 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1970 SDE_AUDIO_POWER_SHIFT);
1971 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1975 if (pch_iir & SDE_AUX_MASK)
1976 dp_aux_irq_handler(dev_priv);
1978 if (pch_iir & SDE_GMBUS)
1979 gmbus_irq_handler(dev_priv);
1981 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1982 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1984 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1985 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1987 if (pch_iir & SDE_POISON)
1988 DRM_ERROR("PCH poison interrupt\n");
1990 if (pch_iir & SDE_FDI_MASK)
1991 for_each_pipe(dev_priv, pipe)
1992 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1994 I915_READ(FDI_RX_IIR(pipe)));
1996 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1997 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1999 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
2000 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
2002 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
2003 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
2005 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
2006 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
2009 static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
2011 u32 err_int = I915_READ(GEN7_ERR_INT);
2014 if (err_int & ERR_INT_POISON)
2015 DRM_ERROR("Poison interrupt\n");
2017 for_each_pipe(dev_priv, pipe) {
2018 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
2019 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2021 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
2022 if (IS_IVYBRIDGE(dev_priv))
2023 ivb_pipe_crc_irq_handler(dev_priv, pipe);
2025 hsw_pipe_crc_irq_handler(dev_priv, pipe);
2029 I915_WRITE(GEN7_ERR_INT, err_int);
2032 static void cpt_serr_int_handler(struct drm_i915_private *dev_priv)
2034 u32 serr_int = I915_READ(SERR_INT);
2036 if (serr_int & SERR_INT_POISON)
2037 DRM_ERROR("PCH poison interrupt\n");
2039 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
2040 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
2042 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
2043 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
2045 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
2046 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_C);
2048 I915_WRITE(SERR_INT, serr_int);
2051 static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
2054 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
2056 ibx_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_cpt);
2058 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
2059 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
2060 SDE_AUDIO_POWER_SHIFT_CPT);
2061 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
2065 if (pch_iir & SDE_AUX_MASK_CPT)
2066 dp_aux_irq_handler(dev_priv);
2068 if (pch_iir & SDE_GMBUS_CPT)
2069 gmbus_irq_handler(dev_priv);
2071 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
2072 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
2074 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
2075 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
2077 if (pch_iir & SDE_FDI_MASK_CPT)
2078 for_each_pipe(dev_priv, pipe)
2079 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
2081 I915_READ(FDI_RX_IIR(pipe)));
2083 if (pch_iir & SDE_ERROR_CPT)
2084 cpt_serr_int_handler(dev_priv);
2087 static void spt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
2089 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_SPT &
2090 ~SDE_PORTE_HOTPLUG_SPT;
2091 u32 hotplug2_trigger = pch_iir & SDE_PORTE_HOTPLUG_SPT;
2092 u32 pin_mask = 0, long_mask = 0;
2094 if (hotplug_trigger) {
2095 u32 dig_hotplug_reg;
2097 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2098 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2100 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
2101 dig_hotplug_reg, hpd_spt,
2102 spt_port_hotplug_long_detect);
2105 if (hotplug2_trigger) {
2106 u32 dig_hotplug_reg;
2108 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG2);
2109 I915_WRITE(PCH_PORT_HOTPLUG2, dig_hotplug_reg);
2111 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug2_trigger,
2112 dig_hotplug_reg, hpd_spt,
2113 spt_port_hotplug2_long_detect);
2117 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2119 if (pch_iir & SDE_GMBUS_CPT)
2120 gmbus_irq_handler(dev_priv);
2123 static void ilk_hpd_irq_handler(struct drm_i915_private *dev_priv,
2124 u32 hotplug_trigger,
2125 const u32 hpd[HPD_NUM_PINS])
2127 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2129 dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
2130 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
2132 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
2133 dig_hotplug_reg, hpd,
2134 ilk_port_hotplug_long_detect);
2136 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2139 static void ilk_display_irq_handler(struct drm_i915_private *dev_priv,
2143 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG;
2145 if (hotplug_trigger)
2146 ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ilk);
2148 if (de_iir & DE_AUX_CHANNEL_A)
2149 dp_aux_irq_handler(dev_priv);
2151 if (de_iir & DE_GSE)
2152 intel_opregion_asle_intr(dev_priv);
2154 if (de_iir & DE_POISON)
2155 DRM_ERROR("Poison interrupt\n");
2157 for_each_pipe(dev_priv, pipe) {
2158 if (de_iir & DE_PIPE_VBLANK(pipe) &&
2159 intel_pipe_handle_vblank(dev_priv, pipe))
2160 intel_check_page_flip(dev_priv, pipe);
2162 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
2163 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2165 if (de_iir & DE_PIPE_CRC_DONE(pipe))
2166 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
2168 /* plane/pipes map 1:1 on ilk+ */
2169 if (de_iir & DE_PLANE_FLIP_DONE(pipe))
2170 intel_finish_page_flip_cs(dev_priv, pipe);
2173 /* check event from PCH */
2174 if (de_iir & DE_PCH_EVENT) {
2175 u32 pch_iir = I915_READ(SDEIIR);
2177 if (HAS_PCH_CPT(dev_priv))
2178 cpt_irq_handler(dev_priv, pch_iir);
2180 ibx_irq_handler(dev_priv, pch_iir);
2182 /* should clear PCH hotplug event before clear CPU irq */
2183 I915_WRITE(SDEIIR, pch_iir);
2186 if (IS_GEN5(dev_priv) && de_iir & DE_PCU_EVENT)
2187 ironlake_rps_change_irq_handler(dev_priv);
2190 static void ivb_display_irq_handler(struct drm_i915_private *dev_priv,
2194 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;
2196 if (hotplug_trigger)
2197 ilk_hpd_irq_handler(dev_priv, hotplug_trigger, hpd_ivb);
2199 if (de_iir & DE_ERR_INT_IVB)
2200 ivb_err_int_handler(dev_priv);
2202 if (de_iir & DE_AUX_CHANNEL_A_IVB)
2203 dp_aux_irq_handler(dev_priv);
2205 if (de_iir & DE_GSE_IVB)
2206 intel_opregion_asle_intr(dev_priv);
2208 for_each_pipe(dev_priv, pipe) {
2209 if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)) &&
2210 intel_pipe_handle_vblank(dev_priv, pipe))
2211 intel_check_page_flip(dev_priv, pipe);
2213 /* plane/pipes map 1:1 on ilk+ */
2214 if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe))
2215 intel_finish_page_flip_cs(dev_priv, pipe);
2218 /* check event from PCH */
2219 if (!HAS_PCH_NOP(dev_priv) && (de_iir & DE_PCH_EVENT_IVB)) {
2220 u32 pch_iir = I915_READ(SDEIIR);
2222 cpt_irq_handler(dev_priv, pch_iir);
2224 /* clear PCH hotplug event before clear CPU irq */
2225 I915_WRITE(SDEIIR, pch_iir);
2230 * To handle irqs with the minimum potential races with fresh interrupts, we:
2231 * 1 - Disable Master Interrupt Control.
2232 * 2 - Find the source(s) of the interrupt.
2233 * 3 - Clear the Interrupt Identity bits (IIR).
2234 * 4 - Process the interrupt(s) that had bits set in the IIRs.
2235 * 5 - Re-enable Master Interrupt Control.
2237 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
2239 struct drm_device *dev = arg;
2240 struct drm_i915_private *dev_priv = dev->dev_private;
2241 u32 de_iir, gt_iir, de_ier, sde_ier = 0;
2242 irqreturn_t ret = IRQ_NONE;
2244 if (!intel_irqs_enabled(dev_priv))
2247 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2248 disable_rpm_wakeref_asserts(dev_priv);
2250 /* disable master interrupt before clearing iir */
2251 de_ier = I915_READ(DEIER);
2252 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
2253 POSTING_READ(DEIER);
2255 /* Disable south interrupts. We'll only write to SDEIIR once, so further
2256 * interrupts will will be stored on its back queue, and then we'll be
2257 * able to process them after we restore SDEIER (as soon as we restore
2258 * it, we'll get an interrupt if SDEIIR still has something to process
2259 * due to its back queue). */
2260 if (!HAS_PCH_NOP(dev_priv)) {
2261 sde_ier = I915_READ(SDEIER);
2262 I915_WRITE(SDEIER, 0);
2263 POSTING_READ(SDEIER);
2266 /* Find, clear, then process each source of interrupt */
2268 gt_iir = I915_READ(GTIIR);
2270 I915_WRITE(GTIIR, gt_iir);
2272 if (INTEL_GEN(dev_priv) >= 6)
2273 snb_gt_irq_handler(dev_priv, gt_iir);
2275 ilk_gt_irq_handler(dev_priv, gt_iir);
2278 de_iir = I915_READ(DEIIR);
2280 I915_WRITE(DEIIR, de_iir);
2282 if (INTEL_GEN(dev_priv) >= 7)
2283 ivb_display_irq_handler(dev_priv, de_iir);
2285 ilk_display_irq_handler(dev_priv, de_iir);
2288 if (INTEL_GEN(dev_priv) >= 6) {
2289 u32 pm_iir = I915_READ(GEN6_PMIIR);
2291 I915_WRITE(GEN6_PMIIR, pm_iir);
2293 gen6_rps_irq_handler(dev_priv, pm_iir);
2297 I915_WRITE(DEIER, de_ier);
2298 POSTING_READ(DEIER);
2299 if (!HAS_PCH_NOP(dev_priv)) {
2300 I915_WRITE(SDEIER, sde_ier);
2301 POSTING_READ(SDEIER);
2304 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2305 enable_rpm_wakeref_asserts(dev_priv);
2310 static void bxt_hpd_irq_handler(struct drm_i915_private *dev_priv,
2311 u32 hotplug_trigger,
2312 const u32 hpd[HPD_NUM_PINS])
2314 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2316 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2317 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2319 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
2320 dig_hotplug_reg, hpd,
2321 bxt_port_hotplug_long_detect);
2323 intel_hpd_irq_handler(dev_priv, pin_mask, long_mask);
2327 gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
2329 irqreturn_t ret = IRQ_NONE;
2333 if (master_ctl & GEN8_DE_MISC_IRQ) {
2334 iir = I915_READ(GEN8_DE_MISC_IIR);
2336 I915_WRITE(GEN8_DE_MISC_IIR, iir);
2338 if (iir & GEN8_DE_MISC_GSE)
2339 intel_opregion_asle_intr(dev_priv);
2341 DRM_ERROR("Unexpected DE Misc interrupt\n");
2344 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
2347 if (master_ctl & GEN8_DE_PORT_IRQ) {
2348 iir = I915_READ(GEN8_DE_PORT_IIR);
2353 I915_WRITE(GEN8_DE_PORT_IIR, iir);
2356 tmp_mask = GEN8_AUX_CHANNEL_A;
2357 if (INTEL_INFO(dev_priv)->gen >= 9)
2358 tmp_mask |= GEN9_AUX_CHANNEL_B |
2359 GEN9_AUX_CHANNEL_C |
2362 if (iir & tmp_mask) {
2363 dp_aux_irq_handler(dev_priv);
2367 if (IS_BROXTON(dev_priv)) {
2368 tmp_mask = iir & BXT_DE_PORT_HOTPLUG_MASK;
2370 bxt_hpd_irq_handler(dev_priv, tmp_mask,
2374 } else if (IS_BROADWELL(dev_priv)) {
2375 tmp_mask = iir & GEN8_PORT_DP_A_HOTPLUG;
2377 ilk_hpd_irq_handler(dev_priv,
2383 if (IS_BROXTON(dev_priv) && (iir & BXT_DE_PORT_GMBUS)) {
2384 gmbus_irq_handler(dev_priv);
2389 DRM_ERROR("Unexpected DE Port interrupt\n");
2392 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
2395 for_each_pipe(dev_priv, pipe) {
2396 u32 flip_done, fault_errors;
2398 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
2401 iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
2403 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
2408 I915_WRITE(GEN8_DE_PIPE_IIR(pipe), iir);
2410 if (iir & GEN8_PIPE_VBLANK &&
2411 intel_pipe_handle_vblank(dev_priv, pipe))
2412 intel_check_page_flip(dev_priv, pipe);
2415 if (INTEL_INFO(dev_priv)->gen >= 9)
2416 flip_done &= GEN9_PIPE_PLANE1_FLIP_DONE;
2418 flip_done &= GEN8_PIPE_PRIMARY_FLIP_DONE;
2421 intel_finish_page_flip_cs(dev_priv, pipe);
2423 if (iir & GEN8_PIPE_CDCLK_CRC_DONE)
2424 hsw_pipe_crc_irq_handler(dev_priv, pipe);
2426 if (iir & GEN8_PIPE_FIFO_UNDERRUN)
2427 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2430 if (INTEL_INFO(dev_priv)->gen >= 9)
2431 fault_errors &= GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
2433 fault_errors &= GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
2436 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
2441 if (HAS_PCH_SPLIT(dev_priv) && !HAS_PCH_NOP(dev_priv) &&
2442 master_ctl & GEN8_DE_PCH_IRQ) {
2444 * FIXME(BDW): Assume for now that the new interrupt handling
2445 * scheme also closed the SDE interrupt handling race we've seen
2446 * on older pch-split platforms. But this needs testing.
2448 iir = I915_READ(SDEIIR);
2450 I915_WRITE(SDEIIR, iir);
2453 if (HAS_PCH_SPT(dev_priv))
2454 spt_irq_handler(dev_priv, iir);
2456 cpt_irq_handler(dev_priv, iir);
2459 * Like on previous PCH there seems to be something
2460 * fishy going on with forwarding PCH interrupts.
2462 DRM_DEBUG_DRIVER("The master control interrupt lied (SDE)!\n");
2469 static irqreturn_t gen8_irq_handler(int irq, void *arg)
2471 struct drm_device *dev = arg;
2472 struct drm_i915_private *dev_priv = dev->dev_private;
2477 if (!intel_irqs_enabled(dev_priv))
2480 master_ctl = I915_READ_FW(GEN8_MASTER_IRQ);
2481 master_ctl &= ~GEN8_MASTER_IRQ_CONTROL;
2485 I915_WRITE_FW(GEN8_MASTER_IRQ, 0);
2487 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
2488 disable_rpm_wakeref_asserts(dev_priv);
2490 /* Find, clear, then process each source of interrupt */
2491 ret = gen8_gt_irq_ack(dev_priv, master_ctl, gt_iir);
2492 gen8_gt_irq_handler(dev_priv, gt_iir);
2493 ret |= gen8_de_irq_handler(dev_priv, master_ctl);
2495 I915_WRITE_FW(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2496 POSTING_READ_FW(GEN8_MASTER_IRQ);
2498 enable_rpm_wakeref_asserts(dev_priv);
2503 static void i915_error_wake_up(struct drm_i915_private *dev_priv,
2504 bool reset_completed)
2506 struct intel_engine_cs *engine;
2509 * Notify all waiters for GPU completion events that reset state has
2510 * been changed, and that they need to restart their wait after
2511 * checking for potential errors (and bail out to drop locks if there is
2512 * a gpu reset pending so that i915_error_work_func can acquire them).
2515 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
2516 for_each_engine(engine, dev_priv)
2517 wake_up_all(&engine->irq_queue);
2519 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
2520 wake_up_all(&dev_priv->pending_flip_queue);
2523 * Signal tasks blocked in i915_gem_wait_for_error that the pending
2524 * reset state is cleared.
2526 if (reset_completed)
2527 wake_up_all(&dev_priv->gpu_error.reset_queue);
2531 * i915_reset_and_wakeup - do process context error handling work
2534 * Fire an error uevent so userspace can see that a hang or error
2537 static void i915_reset_and_wakeup(struct drm_i915_private *dev_priv)
2539 struct kobject *kobj = &dev_priv->dev->primary->kdev->kobj;
2540 char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
2541 char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
2542 char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
2545 kobject_uevent_env(kobj, KOBJ_CHANGE, error_event);
2548 * Note that there's only one work item which does gpu resets, so we
2549 * need not worry about concurrent gpu resets potentially incrementing
2550 * error->reset_counter twice. We only need to take care of another
2551 * racing irq/hangcheck declaring the gpu dead for a second time. A
2552 * quick check for that is good enough: schedule_work ensures the
2553 * correct ordering between hang detection and this work item, and since
2554 * the reset in-progress bit is only ever set by code outside of this
2555 * work we don't need to worry about any other races.
2557 if (i915_reset_in_progress(&dev_priv->gpu_error)) {
2558 DRM_DEBUG_DRIVER("resetting chip\n");
2559 kobject_uevent_env(kobj, KOBJ_CHANGE, reset_event);
2562 * In most cases it's guaranteed that we get here with an RPM
2563 * reference held, for example because there is a pending GPU
2564 * request that won't finish until the reset is done. This
2565 * isn't the case at least when we get here by doing a
2566 * simulated reset via debugs, so get an RPM reference.
2568 intel_runtime_pm_get(dev_priv);
2570 intel_prepare_reset(dev_priv);
2573 * All state reset _must_ be completed before we update the
2574 * reset counter, for otherwise waiters might miss the reset
2575 * pending state and not properly drop locks, resulting in
2576 * deadlocks with the reset work.
2578 ret = i915_reset(dev_priv);
2580 intel_finish_reset(dev_priv);
2582 intel_runtime_pm_put(dev_priv);
2585 kobject_uevent_env(kobj,
2586 KOBJ_CHANGE, reset_done_event);
2589 * Note: The wake_up also serves as a memory barrier so that
2590 * waiters see the update value of the reset counter atomic_t.
2592 i915_error_wake_up(dev_priv, true);
2596 static void i915_report_and_clear_eir(struct drm_i915_private *dev_priv)
2598 uint32_t instdone[I915_NUM_INSTDONE_REG];
2599 u32 eir = I915_READ(EIR);
2605 pr_err("render error detected, EIR: 0x%08x\n", eir);
2607 i915_get_extra_instdone(dev_priv, instdone);
2609 if (IS_G4X(dev_priv)) {
2610 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
2611 u32 ipeir = I915_READ(IPEIR_I965);
2613 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2614 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2615 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2616 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2617 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2618 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2619 I915_WRITE(IPEIR_I965, ipeir);
2620 POSTING_READ(IPEIR_I965);
2622 if (eir & GM45_ERROR_PAGE_TABLE) {
2623 u32 pgtbl_err = I915_READ(PGTBL_ER);
2624 pr_err("page table error\n");
2625 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2626 I915_WRITE(PGTBL_ER, pgtbl_err);
2627 POSTING_READ(PGTBL_ER);
2631 if (!IS_GEN2(dev_priv)) {
2632 if (eir & I915_ERROR_PAGE_TABLE) {
2633 u32 pgtbl_err = I915_READ(PGTBL_ER);
2634 pr_err("page table error\n");
2635 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2636 I915_WRITE(PGTBL_ER, pgtbl_err);
2637 POSTING_READ(PGTBL_ER);
2641 if (eir & I915_ERROR_MEMORY_REFRESH) {
2642 pr_err("memory refresh error:\n");
2643 for_each_pipe(dev_priv, pipe)
2644 pr_err("pipe %c stat: 0x%08x\n",
2645 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2646 /* pipestat has already been acked */
2648 if (eir & I915_ERROR_INSTRUCTION) {
2649 pr_err("instruction error\n");
2650 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2651 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2652 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2653 if (INTEL_GEN(dev_priv) < 4) {
2654 u32 ipeir = I915_READ(IPEIR);
2656 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2657 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2658 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2659 I915_WRITE(IPEIR, ipeir);
2660 POSTING_READ(IPEIR);
2662 u32 ipeir = I915_READ(IPEIR_I965);
2664 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2665 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2666 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2667 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2668 I915_WRITE(IPEIR_I965, ipeir);
2669 POSTING_READ(IPEIR_I965);
2673 I915_WRITE(EIR, eir);
2675 eir = I915_READ(EIR);
2678 * some errors might have become stuck,
2681 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2682 I915_WRITE(EMR, I915_READ(EMR) | eir);
2683 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2688 * i915_handle_error - handle a gpu error
2690 * @engine_mask: mask representing engines that are hung
2691 * Do some basic checking of register state at error time and
2692 * dump it to the syslog. Also call i915_capture_error_state() to make
2693 * sure we get a record and make it available in debugfs. Fire a uevent
2694 * so userspace knows something bad happened (should trigger collection
2695 * of a ring dump etc.).
2697 void i915_handle_error(struct drm_i915_private *dev_priv,
2699 const char *fmt, ...)
2704 va_start(args, fmt);
2705 vscnprintf(error_msg, sizeof(error_msg), fmt, args);
2708 i915_capture_error_state(dev_priv, engine_mask, error_msg);
2709 i915_report_and_clear_eir(dev_priv);
2712 atomic_or(I915_RESET_IN_PROGRESS_FLAG,
2713 &dev_priv->gpu_error.reset_counter);
2716 * Wakeup waiting processes so that the reset function
2717 * i915_reset_and_wakeup doesn't deadlock trying to grab
2718 * various locks. By bumping the reset counter first, the woken
2719 * processes will see a reset in progress and back off,
2720 * releasing their locks and then wait for the reset completion.
2721 * We must do this for _all_ gpu waiters that might hold locks
2722 * that the reset work needs to acquire.
2724 * Note: The wake_up serves as the required memory barrier to
2725 * ensure that the waiters see the updated value of the reset
2728 i915_error_wake_up(dev_priv, false);
2731 i915_reset_and_wakeup(dev_priv);
2734 /* Called from drm generic code, passed 'crtc' which
2735 * we use as a pipe index
2737 static int i915_enable_vblank(struct drm_device *dev, unsigned int pipe)
2739 struct drm_i915_private *dev_priv = dev->dev_private;
2740 unsigned long irqflags;
2742 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2743 if (INTEL_INFO(dev)->gen >= 4)
2744 i915_enable_pipestat(dev_priv, pipe,
2745 PIPE_START_VBLANK_INTERRUPT_STATUS);
2747 i915_enable_pipestat(dev_priv, pipe,
2748 PIPE_VBLANK_INTERRUPT_STATUS);
2749 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2754 static int ironlake_enable_vblank(struct drm_device *dev, unsigned int pipe)
2756 struct drm_i915_private *dev_priv = dev->dev_private;
2757 unsigned long irqflags;
2758 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2759 DE_PIPE_VBLANK(pipe);
2761 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2762 ilk_enable_display_irq(dev_priv, bit);
2763 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2768 static int valleyview_enable_vblank(struct drm_device *dev, unsigned int pipe)
2770 struct drm_i915_private *dev_priv = dev->dev_private;
2771 unsigned long irqflags;
2773 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2774 i915_enable_pipestat(dev_priv, pipe,
2775 PIPE_START_VBLANK_INTERRUPT_STATUS);
2776 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2781 static int gen8_enable_vblank(struct drm_device *dev, unsigned int pipe)
2783 struct drm_i915_private *dev_priv = dev->dev_private;
2784 unsigned long irqflags;
2786 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2787 bdw_enable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
2788 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2793 /* Called from drm generic code, passed 'crtc' which
2794 * we use as a pipe index
2796 static void i915_disable_vblank(struct drm_device *dev, unsigned int pipe)
2798 struct drm_i915_private *dev_priv = dev->dev_private;
2799 unsigned long irqflags;
2801 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2802 i915_disable_pipestat(dev_priv, pipe,
2803 PIPE_VBLANK_INTERRUPT_STATUS |
2804 PIPE_START_VBLANK_INTERRUPT_STATUS);
2805 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2808 static void ironlake_disable_vblank(struct drm_device *dev, unsigned int pipe)
2810 struct drm_i915_private *dev_priv = dev->dev_private;
2811 unsigned long irqflags;
2812 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2813 DE_PIPE_VBLANK(pipe);
2815 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2816 ilk_disable_display_irq(dev_priv, bit);
2817 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2820 static void valleyview_disable_vblank(struct drm_device *dev, unsigned int pipe)
2822 struct drm_i915_private *dev_priv = dev->dev_private;
2823 unsigned long irqflags;
2825 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2826 i915_disable_pipestat(dev_priv, pipe,
2827 PIPE_START_VBLANK_INTERRUPT_STATUS);
2828 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2831 static void gen8_disable_vblank(struct drm_device *dev, unsigned int pipe)
2833 struct drm_i915_private *dev_priv = dev->dev_private;
2834 unsigned long irqflags;
2836 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2837 bdw_disable_pipe_irq(dev_priv, pipe, GEN8_PIPE_VBLANK);
2838 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2842 ring_idle(struct intel_engine_cs *engine, u32 seqno)
2844 return i915_seqno_passed(seqno,
2845 READ_ONCE(engine->last_submitted_seqno));
2849 ipehr_is_semaphore_wait(struct drm_i915_private *dev_priv, u32 ipehr)
2851 if (INTEL_GEN(dev_priv) >= 8) {
2852 return (ipehr >> 23) == 0x1c;
2854 ipehr &= ~MI_SEMAPHORE_SYNC_MASK;
2855 return ipehr == (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE |
2856 MI_SEMAPHORE_REGISTER);
2860 static struct intel_engine_cs *
2861 semaphore_wait_to_signaller_ring(struct intel_engine_cs *engine, u32 ipehr,
2864 struct drm_i915_private *dev_priv = engine->i915;
2865 struct intel_engine_cs *signaller;
2867 if (INTEL_GEN(dev_priv) >= 8) {
2868 for_each_engine(signaller, dev_priv) {
2869 if (engine == signaller)
2872 if (offset == signaller->semaphore.signal_ggtt[engine->id])
2876 u32 sync_bits = ipehr & MI_SEMAPHORE_SYNC_MASK;
2878 for_each_engine(signaller, dev_priv) {
2879 if(engine == signaller)
2882 if (sync_bits == signaller->semaphore.mbox.wait[engine->id])
2887 DRM_ERROR("No signaller ring found for ring %i, ipehr 0x%08x, offset 0x%016llx\n",
2888 engine->id, ipehr, offset);
2893 static struct intel_engine_cs *
2894 semaphore_waits_for(struct intel_engine_cs *engine, u32 *seqno)
2896 struct drm_i915_private *dev_priv = engine->i915;
2897 u32 cmd, ipehr, head;
2902 * This function does not support execlist mode - any attempt to
2903 * proceed further into this function will result in a kernel panic
2904 * when dereferencing ring->buffer, which is not set up in execlist
2907 * The correct way of doing it would be to derive the currently
2908 * executing ring buffer from the current context, which is derived
2909 * from the currently running request. Unfortunately, to get the
2910 * current request we would have to grab the struct_mutex before doing
2911 * anything else, which would be ill-advised since some other thread
2912 * might have grabbed it already and managed to hang itself, causing
2913 * the hang checker to deadlock.
2915 * Therefore, this function does not support execlist mode in its
2916 * current form. Just return NULL and move on.
2918 if (engine->buffer == NULL)
2921 ipehr = I915_READ(RING_IPEHR(engine->mmio_base));
2922 if (!ipehr_is_semaphore_wait(engine->i915, ipehr))
2926 * HEAD is likely pointing to the dword after the actual command,
2927 * so scan backwards until we find the MBOX. But limit it to just 3
2928 * or 4 dwords depending on the semaphore wait command size.
2929 * Note that we don't care about ACTHD here since that might
2930 * point at at batch, and semaphores are always emitted into the
2931 * ringbuffer itself.
2933 head = I915_READ_HEAD(engine) & HEAD_ADDR;
2934 backwards = (INTEL_GEN(dev_priv) >= 8) ? 5 : 4;
2936 for (i = backwards; i; --i) {
2938 * Be paranoid and presume the hw has gone off into the wild -
2939 * our ring is smaller than what the hardware (and hence
2940 * HEAD_ADDR) allows. Also handles wrap-around.
2942 head &= engine->buffer->size - 1;
2944 /* This here seems to blow up */
2945 cmd = ioread32(engine->buffer->virtual_start + head);
2955 *seqno = ioread32(engine->buffer->virtual_start + head + 4) + 1;
2956 if (INTEL_GEN(dev_priv) >= 8) {
2957 offset = ioread32(engine->buffer->virtual_start + head + 12);
2959 offset = ioread32(engine->buffer->virtual_start + head + 8);
2961 return semaphore_wait_to_signaller_ring(engine, ipehr, offset);
2964 static int semaphore_passed(struct intel_engine_cs *engine)
2966 struct drm_i915_private *dev_priv = engine->i915;
2967 struct intel_engine_cs *signaller;
2970 engine->hangcheck.deadlock++;
2972 signaller = semaphore_waits_for(engine, &seqno);
2973 if (signaller == NULL)
2976 /* Prevent pathological recursion due to driver bugs */
2977 if (signaller->hangcheck.deadlock >= I915_NUM_ENGINES)
2980 if (i915_seqno_passed(signaller->get_seqno(signaller), seqno))
2983 /* cursory check for an unkickable deadlock */
2984 if (I915_READ_CTL(signaller) & RING_WAIT_SEMAPHORE &&
2985 semaphore_passed(signaller) < 0)
2991 static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
2993 struct intel_engine_cs *engine;
2995 for_each_engine(engine, dev_priv)
2996 engine->hangcheck.deadlock = 0;
2999 static bool subunits_stuck(struct intel_engine_cs *engine)
3001 u32 instdone[I915_NUM_INSTDONE_REG];
3005 if (engine->id != RCS)
3008 i915_get_extra_instdone(engine->i915, instdone);
3010 /* There might be unstable subunit states even when
3011 * actual head is not moving. Filter out the unstable ones by
3012 * accumulating the undone -> done transitions and only
3013 * consider those as progress.
3016 for (i = 0; i < I915_NUM_INSTDONE_REG; i++) {
3017 const u32 tmp = instdone[i] | engine->hangcheck.instdone[i];
3019 if (tmp != engine->hangcheck.instdone[i])
3022 engine->hangcheck.instdone[i] |= tmp;
3028 static enum intel_ring_hangcheck_action
3029 head_stuck(struct intel_engine_cs *engine, u64 acthd)
3031 if (acthd != engine->hangcheck.acthd) {
3033 /* Clear subunit states on head movement */
3034 memset(engine->hangcheck.instdone, 0,
3035 sizeof(engine->hangcheck.instdone));
3037 return HANGCHECK_ACTIVE;
3040 if (!subunits_stuck(engine))
3041 return HANGCHECK_ACTIVE;
3043 return HANGCHECK_HUNG;
3046 static enum intel_ring_hangcheck_action
3047 ring_stuck(struct intel_engine_cs *engine, u64 acthd)
3049 struct drm_i915_private *dev_priv = engine->i915;
3050 enum intel_ring_hangcheck_action ha;
3053 ha = head_stuck(engine, acthd);
3054 if (ha != HANGCHECK_HUNG)
3057 if (IS_GEN2(dev_priv))
3058 return HANGCHECK_HUNG;
3060 /* Is the chip hanging on a WAIT_FOR_EVENT?
3061 * If so we can simply poke the RB_WAIT bit
3062 * and break the hang. This should work on
3063 * all but the second generation chipsets.
3065 tmp = I915_READ_CTL(engine);
3066 if (tmp & RING_WAIT) {
3067 i915_handle_error(dev_priv, 0,
3068 "Kicking stuck wait on %s",
3070 I915_WRITE_CTL(engine, tmp);
3071 return HANGCHECK_KICK;
3074 if (INTEL_GEN(dev_priv) >= 6 && tmp & RING_WAIT_SEMAPHORE) {
3075 switch (semaphore_passed(engine)) {
3077 return HANGCHECK_HUNG;
3079 i915_handle_error(dev_priv, 0,
3080 "Kicking stuck semaphore on %s",
3082 I915_WRITE_CTL(engine, tmp);
3083 return HANGCHECK_KICK;
3085 return HANGCHECK_WAIT;
3089 return HANGCHECK_HUNG;
3092 static unsigned kick_waiters(struct intel_engine_cs *engine)
3094 struct drm_i915_private *i915 = engine->i915;
3095 unsigned user_interrupts = READ_ONCE(engine->user_interrupts);
3097 if (engine->hangcheck.user_interrupts == user_interrupts &&
3098 !test_and_set_bit(engine->id, &i915->gpu_error.missed_irq_rings)) {
3099 if (!(i915->gpu_error.test_irq_rings & intel_engine_flag(engine)))
3100 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
3103 DRM_INFO("Fake missed irq on %s\n",
3105 wake_up_all(&engine->irq_queue);
3108 return user_interrupts;
3111 * This is called when the chip hasn't reported back with completed
3112 * batchbuffers in a long time. We keep track per ring seqno progress and
3113 * if there are no progress, hangcheck score for that ring is increased.
3114 * Further, acthd is inspected to see if the ring is stuck. On stuck case
3115 * we kick the ring. If we see no progress on three subsequent calls
3116 * we assume chip is wedged and try to fix it by resetting the chip.
3118 static void i915_hangcheck_elapsed(struct work_struct *work)
3120 struct drm_i915_private *dev_priv =
3121 container_of(work, typeof(*dev_priv),
3122 gpu_error.hangcheck_work.work);
3123 struct intel_engine_cs *engine;
3124 enum intel_engine_id id;
3125 int busy_count = 0, rings_hung = 0;
3126 bool stuck[I915_NUM_ENGINES] = { 0 };
3130 #define ACTIVE_DECAY 15
3132 if (!i915.enable_hangcheck)
3136 * The hangcheck work is synced during runtime suspend, we don't
3137 * require a wakeref. TODO: instead of disabling the asserts make
3138 * sure that we hold a reference when this work is running.
3140 DISABLE_RPM_WAKEREF_ASSERTS(dev_priv);
3142 /* As enabling the GPU requires fairly extensive mmio access,
3143 * periodically arm the mmio checker to see if we are triggering
3144 * any invalid access.
3146 intel_uncore_arm_unclaimed_mmio_detection(dev_priv);
3148 for_each_engine_id(engine, dev_priv, id) {
3151 unsigned user_interrupts;
3154 semaphore_clear_deadlocks(dev_priv);
3156 /* We don't strictly need an irq-barrier here, as we are not
3157 * serving an interrupt request, be paranoid in case the
3158 * barrier has side-effects (such as preventing a broken
3159 * cacheline snoop) and so be sure that we can see the seqno
3160 * advance. If the seqno should stick, due to a stale
3161 * cacheline, we would erroneously declare the GPU hung.
3163 if (engine->irq_seqno_barrier)
3164 engine->irq_seqno_barrier(engine);
3166 acthd = intel_ring_get_active_head(engine);
3167 seqno = engine->get_seqno(engine);
3169 /* Reset stuck interrupts between batch advances */
3170 user_interrupts = 0;
3172 if (engine->hangcheck.seqno == seqno) {
3173 if (ring_idle(engine, seqno)) {
3174 engine->hangcheck.action = HANGCHECK_IDLE;
3175 if (waitqueue_active(&engine->irq_queue)) {
3176 /* Safeguard against driver failure */
3177 user_interrupts = kick_waiters(engine);
3178 engine->hangcheck.score += BUSY;
3182 /* We always increment the hangcheck score
3183 * if the ring is busy and still processing
3184 * the same request, so that no single request
3185 * can run indefinitely (such as a chain of
3186 * batches). The only time we do not increment
3187 * the hangcheck score on this ring, if this
3188 * ring is in a legitimate wait for another
3189 * ring. In that case the waiting ring is a
3190 * victim and we want to be sure we catch the
3191 * right culprit. Then every time we do kick
3192 * the ring, add a small increment to the
3193 * score so that we can catch a batch that is
3194 * being repeatedly kicked and so responsible
3195 * for stalling the machine.
3197 engine->hangcheck.action = ring_stuck(engine,
3200 switch (engine->hangcheck.action) {
3201 case HANGCHECK_IDLE:
3202 case HANGCHECK_WAIT:
3204 case HANGCHECK_ACTIVE:
3205 engine->hangcheck.score += BUSY;
3207 case HANGCHECK_KICK:
3208 engine->hangcheck.score += KICK;
3210 case HANGCHECK_HUNG:
3211 engine->hangcheck.score += HUNG;
3217 engine->hangcheck.action = HANGCHECK_ACTIVE;
3219 /* Gradually reduce the count so that we catch DoS
3220 * attempts across multiple batches.
3222 if (engine->hangcheck.score > 0)
3223 engine->hangcheck.score -= ACTIVE_DECAY;
3224 if (engine->hangcheck.score < 0)
3225 engine->hangcheck.score = 0;
3227 /* Clear head and subunit states on seqno movement */
3230 memset(engine->hangcheck.instdone, 0,
3231 sizeof(engine->hangcheck.instdone));
3234 engine->hangcheck.seqno = seqno;
3235 engine->hangcheck.acthd = acthd;
3236 engine->hangcheck.user_interrupts = user_interrupts;
3240 for_each_engine_id(engine, dev_priv, id) {
3241 if (engine->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG) {
3242 DRM_INFO("%s on %s\n",
3243 stuck[id] ? "stuck" : "no progress",
3245 rings_hung |= intel_engine_flag(engine);
3250 i915_handle_error(dev_priv, rings_hung, "Engine(s) hung");
3255 /* Reset timer case chip hangs without another request
3257 i915_queue_hangcheck(dev_priv);
3260 ENABLE_RPM_WAKEREF_ASSERTS(dev_priv);
3263 void i915_queue_hangcheck(struct drm_i915_private *dev_priv)
3265 struct i915_gpu_error *e = &dev_priv->gpu_error;
3267 if (!i915.enable_hangcheck)
3270 /* Don't continually defer the hangcheck so that it is always run at
3271 * least once after work has been scheduled on any ring. Otherwise,
3272 * we will ignore a hung ring if a second ring is kept busy.
3275 queue_delayed_work(e->hangcheck_wq, &e->hangcheck_work,
3276 round_jiffies_up_relative(DRM_I915_HANGCHECK_JIFFIES));
3279 static void ibx_irq_reset(struct drm_device *dev)
3281 struct drm_i915_private *dev_priv = dev->dev_private;
3283 if (HAS_PCH_NOP(dev))
3286 GEN5_IRQ_RESET(SDE);
3288 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
3289 I915_WRITE(SERR_INT, 0xffffffff);
3293 * SDEIER is also touched by the interrupt handler to work around missed PCH
3294 * interrupts. Hence we can't update it after the interrupt handler is enabled -
3295 * instead we unconditionally enable all PCH interrupt sources here, but then
3296 * only unmask them as needed with SDEIMR.
3298 * This function needs to be called before interrupts are enabled.
3300 static void ibx_irq_pre_postinstall(struct drm_device *dev)
3302 struct drm_i915_private *dev_priv = dev->dev_private;
3304 if (HAS_PCH_NOP(dev))
3307 WARN_ON(I915_READ(SDEIER) != 0);
3308 I915_WRITE(SDEIER, 0xffffffff);
3309 POSTING_READ(SDEIER);
3312 static void gen5_gt_irq_reset(struct drm_device *dev)
3314 struct drm_i915_private *dev_priv = dev->dev_private;
3317 if (INTEL_INFO(dev)->gen >= 6)
3318 GEN5_IRQ_RESET(GEN6_PM);
3321 static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
3325 if (IS_CHERRYVIEW(dev_priv))
3326 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
3328 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
3330 i915_hotplug_interrupt_update_locked(dev_priv, 0xffffffff, 0);
3331 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3333 for_each_pipe(dev_priv, pipe) {
3334 I915_WRITE(PIPESTAT(pipe),
3335 PIPE_FIFO_UNDERRUN_STATUS |
3336 PIPESTAT_INT_STATUS_MASK);
3337 dev_priv->pipestat_irq_mask[pipe] = 0;
3340 GEN5_IRQ_RESET(VLV_);
3341 dev_priv->irq_mask = ~0;
3344 static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
3350 pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
3351 PIPE_CRC_DONE_INTERRUPT_STATUS;
3353 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3354 for_each_pipe(dev_priv, pipe)
3355 i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
3357 enable_mask = I915_DISPLAY_PORT_INTERRUPT |
3358 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3359 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
3360 if (IS_CHERRYVIEW(dev_priv))
3361 enable_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
3363 WARN_ON(dev_priv->irq_mask != ~0);
3365 dev_priv->irq_mask = ~enable_mask;
3367 GEN5_IRQ_INIT(VLV_, dev_priv->irq_mask, enable_mask);
3372 static void ironlake_irq_reset(struct drm_device *dev)
3374 struct drm_i915_private *dev_priv = dev->dev_private;
3376 I915_WRITE(HWSTAM, 0xffffffff);
3380 I915_WRITE(GEN7_ERR_INT, 0xffffffff);
3382 gen5_gt_irq_reset(dev);
3387 static void valleyview_irq_preinstall(struct drm_device *dev)
3389 struct drm_i915_private *dev_priv = dev->dev_private;
3391 I915_WRITE(VLV_MASTER_IER, 0);
3392 POSTING_READ(VLV_MASTER_IER);
3394 gen5_gt_irq_reset(dev);
3396 spin_lock_irq(&dev_priv->irq_lock);
3397 if (dev_priv->display_irqs_enabled)
3398 vlv_display_irq_reset(dev_priv);
3399 spin_unlock_irq(&dev_priv->irq_lock);
3402 static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
3404 GEN8_IRQ_RESET_NDX(GT, 0);
3405 GEN8_IRQ_RESET_NDX(GT, 1);
3406 GEN8_IRQ_RESET_NDX(GT, 2);
3407 GEN8_IRQ_RESET_NDX(GT, 3);
3410 static void gen8_irq_reset(struct drm_device *dev)
3412 struct drm_i915_private *dev_priv = dev->dev_private;
3415 I915_WRITE(GEN8_MASTER_IRQ, 0);
3416 POSTING_READ(GEN8_MASTER_IRQ);
3418 gen8_gt_irq_reset(dev_priv);
3420 for_each_pipe(dev_priv, pipe)
3421 if (intel_display_power_is_enabled(dev_priv,
3422 POWER_DOMAIN_PIPE(pipe)))
3423 GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
3425 GEN5_IRQ_RESET(GEN8_DE_PORT_);
3426 GEN5_IRQ_RESET(GEN8_DE_MISC_);
3427 GEN5_IRQ_RESET(GEN8_PCU_);
3429 if (HAS_PCH_SPLIT(dev))
3433 void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
3434 unsigned int pipe_mask)
3436 uint32_t extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
3439 spin_lock_irq(&dev_priv->irq_lock);
3440 for_each_pipe_masked(dev_priv, pipe, pipe_mask)
3441 GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
3442 dev_priv->de_irq_mask[pipe],
3443 ~dev_priv->de_irq_mask[pipe] | extra_ier);
3444 spin_unlock_irq(&dev_priv->irq_lock);
3447 void gen8_irq_power_well_pre_disable(struct drm_i915_private *dev_priv,
3448 unsigned int pipe_mask)
3452 spin_lock_irq(&dev_priv->irq_lock);
3453 for_each_pipe_masked(dev_priv, pipe, pipe_mask)
3454 GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
3455 spin_unlock_irq(&dev_priv->irq_lock);
3457 /* make sure we're done processing display irqs */
3458 synchronize_irq(dev_priv->dev->irq);
3461 static void cherryview_irq_preinstall(struct drm_device *dev)
3463 struct drm_i915_private *dev_priv = dev->dev_private;
3465 I915_WRITE(GEN8_MASTER_IRQ, 0);
3466 POSTING_READ(GEN8_MASTER_IRQ);
3468 gen8_gt_irq_reset(dev_priv);
3470 GEN5_IRQ_RESET(GEN8_PCU_);
3472 spin_lock_irq(&dev_priv->irq_lock);
3473 if (dev_priv->display_irqs_enabled)
3474 vlv_display_irq_reset(dev_priv);
3475 spin_unlock_irq(&dev_priv->irq_lock);
3478 static u32 intel_hpd_enabled_irqs(struct drm_i915_private *dev_priv,
3479 const u32 hpd[HPD_NUM_PINS])
3481 struct intel_encoder *encoder;
3482 u32 enabled_irqs = 0;
3484 for_each_intel_encoder(dev_priv->dev, encoder)
3485 if (dev_priv->hotplug.stats[encoder->hpd_pin].state == HPD_ENABLED)
3486 enabled_irqs |= hpd[encoder->hpd_pin];
3488 return enabled_irqs;
3491 static void ibx_hpd_irq_setup(struct drm_i915_private *dev_priv)
3493 u32 hotplug_irqs, hotplug, enabled_irqs;
3495 if (HAS_PCH_IBX(dev_priv)) {
3496 hotplug_irqs = SDE_HOTPLUG_MASK;
3497 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ibx);
3499 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
3500 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_cpt);
3503 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3506 * Enable digital hotplug on the PCH, and configure the DP short pulse
3507 * duration to 2ms (which is the minimum in the Display Port spec).
3508 * The pulse duration bits are reserved on LPT+.
3510 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3511 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
3512 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
3513 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
3514 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
3516 * When CPU and PCH are on the same package, port A
3517 * HPD must be enabled in both north and south.
3519 if (HAS_PCH_LPT_LP(dev_priv))
3520 hotplug |= PORTA_HOTPLUG_ENABLE;
3521 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3524 static void spt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3526 u32 hotplug_irqs, hotplug, enabled_irqs;
3528 hotplug_irqs = SDE_HOTPLUG_MASK_SPT;
3529 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_spt);
3531 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3533 /* Enable digital hotplug on the PCH */
3534 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3535 hotplug |= PORTD_HOTPLUG_ENABLE | PORTC_HOTPLUG_ENABLE |
3536 PORTB_HOTPLUG_ENABLE | PORTA_HOTPLUG_ENABLE;
3537 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3539 hotplug = I915_READ(PCH_PORT_HOTPLUG2);
3540 hotplug |= PORTE_HOTPLUG_ENABLE;
3541 I915_WRITE(PCH_PORT_HOTPLUG2, hotplug);
3544 static void ilk_hpd_irq_setup(struct drm_i915_private *dev_priv)
3546 u32 hotplug_irqs, hotplug, enabled_irqs;
3548 if (INTEL_GEN(dev_priv) >= 8) {
3549 hotplug_irqs = GEN8_PORT_DP_A_HOTPLUG;
3550 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bdw);
3552 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3553 } else if (INTEL_GEN(dev_priv) >= 7) {
3554 hotplug_irqs = DE_DP_A_HOTPLUG_IVB;
3555 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ivb);
3557 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3559 hotplug_irqs = DE_DP_A_HOTPLUG;
3560 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_ilk);
3562 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3566 * Enable digital hotplug on the CPU, and configure the DP short pulse
3567 * duration to 2ms (which is the minimum in the Display Port spec)
3568 * The pulse duration bits are reserved on HSW+.
3570 hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
3571 hotplug &= ~DIGITAL_PORTA_PULSE_DURATION_MASK;
3572 hotplug |= DIGITAL_PORTA_HOTPLUG_ENABLE | DIGITAL_PORTA_PULSE_DURATION_2ms;
3573 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, hotplug);
3575 ibx_hpd_irq_setup(dev_priv);
3578 static void bxt_hpd_irq_setup(struct drm_i915_private *dev_priv)
3580 u32 hotplug_irqs, hotplug, enabled_irqs;
3582 enabled_irqs = intel_hpd_enabled_irqs(dev_priv, hpd_bxt);
3583 hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK;
3585 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3587 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3588 hotplug |= PORTC_HOTPLUG_ENABLE | PORTB_HOTPLUG_ENABLE |
3589 PORTA_HOTPLUG_ENABLE;
3591 DRM_DEBUG_KMS("Invert bit setting: hp_ctl:%x hp_port:%x\n",
3592 hotplug, enabled_irqs);
3593 hotplug &= ~BXT_DDI_HPD_INVERT_MASK;
3596 * For BXT invert bit has to be set based on AOB design
3597 * for HPD detection logic, update it based on VBT fields.
3600 if ((enabled_irqs & BXT_DE_PORT_HP_DDIA) &&
3601 intel_bios_is_port_hpd_inverted(dev_priv, PORT_A))
3602 hotplug |= BXT_DDIA_HPD_INVERT;
3603 if ((enabled_irqs & BXT_DE_PORT_HP_DDIB) &&
3604 intel_bios_is_port_hpd_inverted(dev_priv, PORT_B))
3605 hotplug |= BXT_DDIB_HPD_INVERT;
3606 if ((enabled_irqs & BXT_DE_PORT_HP_DDIC) &&
3607 intel_bios_is_port_hpd_inverted(dev_priv, PORT_C))
3608 hotplug |= BXT_DDIC_HPD_INVERT;
3610 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3613 static void ibx_irq_postinstall(struct drm_device *dev)
3615 struct drm_i915_private *dev_priv = dev->dev_private;
3618 if (HAS_PCH_NOP(dev))
3621 if (HAS_PCH_IBX(dev))
3622 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
3624 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
3626 gen5_assert_iir_is_zero(dev_priv, SDEIIR);
3627 I915_WRITE(SDEIMR, ~mask);
3630 static void gen5_gt_irq_postinstall(struct drm_device *dev)
3632 struct drm_i915_private *dev_priv = dev->dev_private;
3633 u32 pm_irqs, gt_irqs;
3635 pm_irqs = gt_irqs = 0;
3637 dev_priv->gt_irq_mask = ~0;
3638 if (HAS_L3_DPF(dev)) {
3639 /* L3 parity interrupt is always unmasked. */
3640 dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev);
3641 gt_irqs |= GT_PARITY_ERROR(dev);
3644 gt_irqs |= GT_RENDER_USER_INTERRUPT;
3646 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
3647 ILK_BSD_USER_INTERRUPT;
3649 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
3652 GEN5_IRQ_INIT(GT, dev_priv->gt_irq_mask, gt_irqs);
3654 if (INTEL_INFO(dev)->gen >= 6) {
3656 * RPS interrupts will get enabled/disabled on demand when RPS
3657 * itself is enabled/disabled.
3660 pm_irqs |= PM_VEBOX_USER_INTERRUPT;
3662 dev_priv->pm_irq_mask = 0xffffffff;
3663 GEN5_IRQ_INIT(GEN6_PM, dev_priv->pm_irq_mask, pm_irqs);
3667 static int ironlake_irq_postinstall(struct drm_device *dev)
3669 struct drm_i915_private *dev_priv = dev->dev_private;
3670 u32 display_mask, extra_mask;
3672 if (INTEL_INFO(dev)->gen >= 7) {
3673 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
3674 DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB |
3675 DE_PLANEB_FLIP_DONE_IVB |
3676 DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB);
3677 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
3678 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
3679 DE_DP_A_HOTPLUG_IVB);
3681 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
3682 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
3684 DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE |
3686 extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
3687 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
3691 dev_priv->irq_mask = ~display_mask;
3693 I915_WRITE(HWSTAM, 0xeffe);
3695 ibx_irq_pre_postinstall(dev);
3697 GEN5_IRQ_INIT(DE, dev_priv->irq_mask, display_mask | extra_mask);
3699 gen5_gt_irq_postinstall(dev);
3701 ibx_irq_postinstall(dev);
3703 if (IS_IRONLAKE_M(dev)) {
3704 /* Enable PCU event interrupts
3706 * spinlocking not required here for correctness since interrupt
3707 * setup is guaranteed to run in single-threaded context. But we
3708 * need it to make the assert_spin_locked happy. */
3709 spin_lock_irq(&dev_priv->irq_lock);
3710 ilk_enable_display_irq(dev_priv, DE_PCU_EVENT);
3711 spin_unlock_irq(&dev_priv->irq_lock);
3717 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
3719 assert_spin_locked(&dev_priv->irq_lock);
3721 if (dev_priv->display_irqs_enabled)
3724 dev_priv->display_irqs_enabled = true;
3726 if (intel_irqs_enabled(dev_priv)) {
3727 vlv_display_irq_reset(dev_priv);
3728 vlv_display_irq_postinstall(dev_priv);
3732 void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
3734 assert_spin_locked(&dev_priv->irq_lock);
3736 if (!dev_priv->display_irqs_enabled)
3739 dev_priv->display_irqs_enabled = false;
3741 if (intel_irqs_enabled(dev_priv))
3742 vlv_display_irq_reset(dev_priv);
3746 static int valleyview_irq_postinstall(struct drm_device *dev)
3748 struct drm_i915_private *dev_priv = dev->dev_private;
3750 gen5_gt_irq_postinstall(dev);
3752 spin_lock_irq(&dev_priv->irq_lock);
3753 if (dev_priv->display_irqs_enabled)
3754 vlv_display_irq_postinstall(dev_priv);
3755 spin_unlock_irq(&dev_priv->irq_lock);
3757 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
3758 POSTING_READ(VLV_MASTER_IER);
3763 static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
3765 /* These are interrupts we'll toggle with the ring mask register */
3766 uint32_t gt_interrupts[] = {
3767 GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
3768 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
3769 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT |
3770 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT,
3771 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
3772 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
3773 GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT |
3774 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT,
3776 GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
3777 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT
3780 if (HAS_L3_DPF(dev_priv))
3781 gt_interrupts[0] |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
3783 dev_priv->pm_irq_mask = 0xffffffff;
3784 GEN8_IRQ_INIT_NDX(GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
3785 GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
3787 * RPS interrupts will get enabled/disabled on demand when RPS itself
3788 * is enabled/disabled.
3790 GEN8_IRQ_INIT_NDX(GT, 2, dev_priv->pm_irq_mask, 0);
3791 GEN8_IRQ_INIT_NDX(GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
3794 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
3796 uint32_t de_pipe_masked = GEN8_PIPE_CDCLK_CRC_DONE;
3797 uint32_t de_pipe_enables;
3798 u32 de_port_masked = GEN8_AUX_CHANNEL_A;
3799 u32 de_port_enables;
3802 if (INTEL_INFO(dev_priv)->gen >= 9) {
3803 de_pipe_masked |= GEN9_PIPE_PLANE1_FLIP_DONE |
3804 GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
3805 de_port_masked |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
3807 if (IS_BROXTON(dev_priv))
3808 de_port_masked |= BXT_DE_PORT_GMBUS;
3810 de_pipe_masked |= GEN8_PIPE_PRIMARY_FLIP_DONE |
3811 GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
3814 de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
3815 GEN8_PIPE_FIFO_UNDERRUN;
3817 de_port_enables = de_port_masked;
3818 if (IS_BROXTON(dev_priv))
3819 de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK;
3820 else if (IS_BROADWELL(dev_priv))
3821 de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
3823 dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked;
3824 dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked;
3825 dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked;
3827 for_each_pipe(dev_priv, pipe)
3828 if (intel_display_power_is_enabled(dev_priv,
3829 POWER_DOMAIN_PIPE(pipe)))
3830 GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
3831 dev_priv->de_irq_mask[pipe],
3834 GEN5_IRQ_INIT(GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
3837 static int gen8_irq_postinstall(struct drm_device *dev)
3839 struct drm_i915_private *dev_priv = dev->dev_private;
3841 if (HAS_PCH_SPLIT(dev))
3842 ibx_irq_pre_postinstall(dev);
3844 gen8_gt_irq_postinstall(dev_priv);
3845 gen8_de_irq_postinstall(dev_priv);
3847 if (HAS_PCH_SPLIT(dev))
3848 ibx_irq_postinstall(dev);
3850 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
3851 POSTING_READ(GEN8_MASTER_IRQ);
3856 static int cherryview_irq_postinstall(struct drm_device *dev)
3858 struct drm_i915_private *dev_priv = dev->dev_private;
3860 gen8_gt_irq_postinstall(dev_priv);
3862 spin_lock_irq(&dev_priv->irq_lock);
3863 if (dev_priv->display_irqs_enabled)
3864 vlv_display_irq_postinstall(dev_priv);
3865 spin_unlock_irq(&dev_priv->irq_lock);
3867 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
3868 POSTING_READ(GEN8_MASTER_IRQ);
3873 static void gen8_irq_uninstall(struct drm_device *dev)
3875 struct drm_i915_private *dev_priv = dev->dev_private;
3880 gen8_irq_reset(dev);
3883 static void valleyview_irq_uninstall(struct drm_device *dev)
3885 struct drm_i915_private *dev_priv = dev->dev_private;
3890 I915_WRITE(VLV_MASTER_IER, 0);
3891 POSTING_READ(VLV_MASTER_IER);
3893 gen5_gt_irq_reset(dev);
3895 I915_WRITE(HWSTAM, 0xffffffff);
3897 spin_lock_irq(&dev_priv->irq_lock);
3898 if (dev_priv->display_irqs_enabled)
3899 vlv_display_irq_reset(dev_priv);
3900 spin_unlock_irq(&dev_priv->irq_lock);
3903 static void cherryview_irq_uninstall(struct drm_device *dev)
3905 struct drm_i915_private *dev_priv = dev->dev_private;
3910 I915_WRITE(GEN8_MASTER_IRQ, 0);
3911 POSTING_READ(GEN8_MASTER_IRQ);
3913 gen8_gt_irq_reset(dev_priv);
3915 GEN5_IRQ_RESET(GEN8_PCU_);
3917 spin_lock_irq(&dev_priv->irq_lock);
3918 if (dev_priv->display_irqs_enabled)
3919 vlv_display_irq_reset(dev_priv);
3920 spin_unlock_irq(&dev_priv->irq_lock);
3923 static void ironlake_irq_uninstall(struct drm_device *dev)
3925 struct drm_i915_private *dev_priv = dev->dev_private;
3930 ironlake_irq_reset(dev);
3933 static void i8xx_irq_preinstall(struct drm_device * dev)
3935 struct drm_i915_private *dev_priv = dev->dev_private;
3938 for_each_pipe(dev_priv, pipe)
3939 I915_WRITE(PIPESTAT(pipe), 0);
3940 I915_WRITE16(IMR, 0xffff);
3941 I915_WRITE16(IER, 0x0);
3942 POSTING_READ16(IER);
3945 static int i8xx_irq_postinstall(struct drm_device *dev)
3947 struct drm_i915_private *dev_priv = dev->dev_private;
3950 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3952 /* Unmask the interrupts that we always want on. */
3953 dev_priv->irq_mask =
3954 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3955 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3956 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3957 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3958 I915_WRITE16(IMR, dev_priv->irq_mask);
3961 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3962 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3963 I915_USER_INTERRUPT);
3964 POSTING_READ16(IER);
3966 /* Interrupt setup is already guaranteed to be single-threaded, this is
3967 * just to make the assert_spin_locked check happy. */
3968 spin_lock_irq(&dev_priv->irq_lock);
3969 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3970 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3971 spin_unlock_irq(&dev_priv->irq_lock);
3977 * Returns true when a page flip has completed.
3979 static bool i8xx_handle_vblank(struct drm_i915_private *dev_priv,
3980 int plane, int pipe, u32 iir)
3982 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3984 if (!intel_pipe_handle_vblank(dev_priv, pipe))
3987 if ((iir & flip_pending) == 0)
3988 goto check_page_flip;
3990 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3991 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3992 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3993 * the flip is completed (no longer pending). Since this doesn't raise
3994 * an interrupt per se, we watch for the change at vblank.
3996 if (I915_READ16(ISR) & flip_pending)
3997 goto check_page_flip;
3999 intel_finish_page_flip_cs(dev_priv, pipe);
4003 intel_check_page_flip(dev_priv, pipe);
4007 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
4009 struct drm_device *dev = arg;
4010 struct drm_i915_private *dev_priv = dev->dev_private;
4015 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4016 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
4019 if (!intel_irqs_enabled(dev_priv))
4022 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4023 disable_rpm_wakeref_asserts(dev_priv);
4026 iir = I915_READ16(IIR);
4030 while (iir & ~flip_mask) {
4031 /* Can't rely on pipestat interrupt bit in iir as it might
4032 * have been cleared after the pipestat interrupt was received.
4033 * It doesn't set the bit in iir again, but it still produces
4034 * interrupts (for non-MSI).
4036 spin_lock(&dev_priv->irq_lock);
4037 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
4038 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
4040 for_each_pipe(dev_priv, pipe) {
4041 i915_reg_t reg = PIPESTAT(pipe);
4042 pipe_stats[pipe] = I915_READ(reg);
4045 * Clear the PIPE*STAT regs before the IIR
4047 if (pipe_stats[pipe] & 0x8000ffff)
4048 I915_WRITE(reg, pipe_stats[pipe]);
4050 spin_unlock(&dev_priv->irq_lock);
4052 I915_WRITE16(IIR, iir & ~flip_mask);
4053 new_iir = I915_READ16(IIR); /* Flush posted writes */
4055 if (iir & I915_USER_INTERRUPT)
4056 notify_ring(&dev_priv->engine[RCS]);
4058 for_each_pipe(dev_priv, pipe) {
4060 if (HAS_FBC(dev_priv))
4063 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
4064 i8xx_handle_vblank(dev_priv, plane, pipe, iir))
4065 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
4067 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
4068 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
4070 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
4071 intel_cpu_fifo_underrun_irq_handler(dev_priv,
4080 enable_rpm_wakeref_asserts(dev_priv);
4085 static void i8xx_irq_uninstall(struct drm_device * dev)
4087 struct drm_i915_private *dev_priv = dev->dev_private;
4090 for_each_pipe(dev_priv, pipe) {
4091 /* Clear enable bits; then clear status bits */
4092 I915_WRITE(PIPESTAT(pipe), 0);
4093 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
4095 I915_WRITE16(IMR, 0xffff);
4096 I915_WRITE16(IER, 0x0);
4097 I915_WRITE16(IIR, I915_READ16(IIR));
4100 static void i915_irq_preinstall(struct drm_device * dev)
4102 struct drm_i915_private *dev_priv = dev->dev_private;
4105 if (I915_HAS_HOTPLUG(dev)) {
4106 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4107 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4110 I915_WRITE16(HWSTAM, 0xeffe);
4111 for_each_pipe(dev_priv, pipe)
4112 I915_WRITE(PIPESTAT(pipe), 0);
4113 I915_WRITE(IMR, 0xffffffff);
4114 I915_WRITE(IER, 0x0);
4118 static int i915_irq_postinstall(struct drm_device *dev)
4120 struct drm_i915_private *dev_priv = dev->dev_private;
4123 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
4125 /* Unmask the interrupts that we always want on. */
4126 dev_priv->irq_mask =
4127 ~(I915_ASLE_INTERRUPT |
4128 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4129 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4130 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4131 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
4134 I915_ASLE_INTERRUPT |
4135 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4136 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4137 I915_USER_INTERRUPT;
4139 if (I915_HAS_HOTPLUG(dev)) {
4140 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4141 POSTING_READ(PORT_HOTPLUG_EN);
4143 /* Enable in IER... */
4144 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
4145 /* and unmask in IMR */
4146 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
4149 I915_WRITE(IMR, dev_priv->irq_mask);
4150 I915_WRITE(IER, enable_mask);
4153 i915_enable_asle_pipestat(dev_priv);
4155 /* Interrupt setup is already guaranteed to be single-threaded, this is
4156 * just to make the assert_spin_locked check happy. */
4157 spin_lock_irq(&dev_priv->irq_lock);
4158 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4159 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4160 spin_unlock_irq(&dev_priv->irq_lock);
4166 * Returns true when a page flip has completed.
4168 static bool i915_handle_vblank(struct drm_i915_private *dev_priv,
4169 int plane, int pipe, u32 iir)
4171 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
4173 if (!intel_pipe_handle_vblank(dev_priv, pipe))
4176 if ((iir & flip_pending) == 0)
4177 goto check_page_flip;
4179 /* We detect FlipDone by looking for the change in PendingFlip from '1'
4180 * to '0' on the following vblank, i.e. IIR has the Pendingflip
4181 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
4182 * the flip is completed (no longer pending). Since this doesn't raise
4183 * an interrupt per se, we watch for the change at vblank.
4185 if (I915_READ(ISR) & flip_pending)
4186 goto check_page_flip;
4188 intel_finish_page_flip_cs(dev_priv, pipe);
4192 intel_check_page_flip(dev_priv, pipe);
4196 static irqreturn_t i915_irq_handler(int irq, void *arg)
4198 struct drm_device *dev = arg;
4199 struct drm_i915_private *dev_priv = dev->dev_private;
4200 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
4202 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4203 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
4204 int pipe, ret = IRQ_NONE;
4206 if (!intel_irqs_enabled(dev_priv))
4209 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4210 disable_rpm_wakeref_asserts(dev_priv);
4212 iir = I915_READ(IIR);
4214 bool irq_received = (iir & ~flip_mask) != 0;
4215 bool blc_event = false;
4217 /* Can't rely on pipestat interrupt bit in iir as it might
4218 * have been cleared after the pipestat interrupt was received.
4219 * It doesn't set the bit in iir again, but it still produces
4220 * interrupts (for non-MSI).
4222 spin_lock(&dev_priv->irq_lock);
4223 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
4224 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
4226 for_each_pipe(dev_priv, pipe) {
4227 i915_reg_t reg = PIPESTAT(pipe);
4228 pipe_stats[pipe] = I915_READ(reg);
4230 /* Clear the PIPE*STAT regs before the IIR */
4231 if (pipe_stats[pipe] & 0x8000ffff) {
4232 I915_WRITE(reg, pipe_stats[pipe]);
4233 irq_received = true;
4236 spin_unlock(&dev_priv->irq_lock);
4241 /* Consume port. Then clear IIR or we'll miss events */
4242 if (I915_HAS_HOTPLUG(dev_priv) &&
4243 iir & I915_DISPLAY_PORT_INTERRUPT) {
4244 u32 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
4246 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
4249 I915_WRITE(IIR, iir & ~flip_mask);
4250 new_iir = I915_READ(IIR); /* Flush posted writes */
4252 if (iir & I915_USER_INTERRUPT)
4253 notify_ring(&dev_priv->engine[RCS]);
4255 for_each_pipe(dev_priv, pipe) {
4257 if (HAS_FBC(dev_priv))
4260 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
4261 i915_handle_vblank(dev_priv, plane, pipe, iir))
4262 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
4264 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
4267 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
4268 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
4270 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
4271 intel_cpu_fifo_underrun_irq_handler(dev_priv,
4275 if (blc_event || (iir & I915_ASLE_INTERRUPT))
4276 intel_opregion_asle_intr(dev_priv);
4278 /* With MSI, interrupts are only generated when iir
4279 * transitions from zero to nonzero. If another bit got
4280 * set while we were handling the existing iir bits, then
4281 * we would never get another interrupt.
4283 * This is fine on non-MSI as well, as if we hit this path
4284 * we avoid exiting the interrupt handler only to generate
4287 * Note that for MSI this could cause a stray interrupt report
4288 * if an interrupt landed in the time between writing IIR and
4289 * the posting read. This should be rare enough to never
4290 * trigger the 99% of 100,000 interrupts test for disabling
4295 } while (iir & ~flip_mask);
4297 enable_rpm_wakeref_asserts(dev_priv);
4302 static void i915_irq_uninstall(struct drm_device * dev)
4304 struct drm_i915_private *dev_priv = dev->dev_private;
4307 if (I915_HAS_HOTPLUG(dev)) {
4308 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4309 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4312 I915_WRITE16(HWSTAM, 0xffff);
4313 for_each_pipe(dev_priv, pipe) {
4314 /* Clear enable bits; then clear status bits */
4315 I915_WRITE(PIPESTAT(pipe), 0);
4316 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
4318 I915_WRITE(IMR, 0xffffffff);
4319 I915_WRITE(IER, 0x0);
4321 I915_WRITE(IIR, I915_READ(IIR));
4324 static void i965_irq_preinstall(struct drm_device * dev)
4326 struct drm_i915_private *dev_priv = dev->dev_private;
4329 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4330 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4332 I915_WRITE(HWSTAM, 0xeffe);
4333 for_each_pipe(dev_priv, pipe)
4334 I915_WRITE(PIPESTAT(pipe), 0);
4335 I915_WRITE(IMR, 0xffffffff);
4336 I915_WRITE(IER, 0x0);
4340 static int i965_irq_postinstall(struct drm_device *dev)
4342 struct drm_i915_private *dev_priv = dev->dev_private;
4346 /* Unmask the interrupts that we always want on. */
4347 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
4348 I915_DISPLAY_PORT_INTERRUPT |
4349 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4350 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4351 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4352 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
4353 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
4355 enable_mask = ~dev_priv->irq_mask;
4356 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4357 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
4358 enable_mask |= I915_USER_INTERRUPT;
4360 if (IS_G4X(dev_priv))
4361 enable_mask |= I915_BSD_USER_INTERRUPT;
4363 /* Interrupt setup is already guaranteed to be single-threaded, this is
4364 * just to make the assert_spin_locked check happy. */
4365 spin_lock_irq(&dev_priv->irq_lock);
4366 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
4367 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4368 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4369 spin_unlock_irq(&dev_priv->irq_lock);
4372 * Enable some error detection, note the instruction error mask
4373 * bit is reserved, so we leave it masked.
4375 if (IS_G4X(dev_priv)) {
4376 error_mask = ~(GM45_ERROR_PAGE_TABLE |
4377 GM45_ERROR_MEM_PRIV |
4378 GM45_ERROR_CP_PRIV |
4379 I915_ERROR_MEMORY_REFRESH);
4381 error_mask = ~(I915_ERROR_PAGE_TABLE |
4382 I915_ERROR_MEMORY_REFRESH);
4384 I915_WRITE(EMR, error_mask);
4386 I915_WRITE(IMR, dev_priv->irq_mask);
4387 I915_WRITE(IER, enable_mask);
4390 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4391 POSTING_READ(PORT_HOTPLUG_EN);
4393 i915_enable_asle_pipestat(dev_priv);
4398 static void i915_hpd_irq_setup(struct drm_i915_private *dev_priv)
4402 assert_spin_locked(&dev_priv->irq_lock);
4404 /* Note HDMI and DP share hotplug bits */
4405 /* enable bits are the same for all generations */
4406 hotplug_en = intel_hpd_enabled_irqs(dev_priv, hpd_mask_i915);
4407 /* Programming the CRT detection parameters tends
4408 to generate a spurious hotplug event about three
4409 seconds later. So just do it once.
4411 if (IS_G4X(dev_priv))
4412 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
4413 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
4415 /* Ignore TV since it's buggy */
4416 i915_hotplug_interrupt_update_locked(dev_priv,
4417 HOTPLUG_INT_EN_MASK |
4418 CRT_HOTPLUG_VOLTAGE_COMPARE_MASK |
4419 CRT_HOTPLUG_ACTIVATION_PERIOD_64,
4423 static irqreturn_t i965_irq_handler(int irq, void *arg)
4425 struct drm_device *dev = arg;
4426 struct drm_i915_private *dev_priv = dev->dev_private;
4428 u32 pipe_stats[I915_MAX_PIPES];
4429 int ret = IRQ_NONE, pipe;
4431 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4432 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
4434 if (!intel_irqs_enabled(dev_priv))
4437 /* IRQs are synced during runtime_suspend, we don't require a wakeref */
4438 disable_rpm_wakeref_asserts(dev_priv);
4440 iir = I915_READ(IIR);
4443 bool irq_received = (iir & ~flip_mask) != 0;
4444 bool blc_event = false;
4446 /* Can't rely on pipestat interrupt bit in iir as it might
4447 * have been cleared after the pipestat interrupt was received.
4448 * It doesn't set the bit in iir again, but it still produces
4449 * interrupts (for non-MSI).
4451 spin_lock(&dev_priv->irq_lock);
4452 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
4453 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
4455 for_each_pipe(dev_priv, pipe) {
4456 i915_reg_t reg = PIPESTAT(pipe);
4457 pipe_stats[pipe] = I915_READ(reg);
4460 * Clear the PIPE*STAT regs before the IIR
4462 if (pipe_stats[pipe] & 0x8000ffff) {
4463 I915_WRITE(reg, pipe_stats[pipe]);
4464 irq_received = true;
4467 spin_unlock(&dev_priv->irq_lock);
4474 /* Consume port. Then clear IIR or we'll miss events */
4475 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
4476 u32 hotplug_status = i9xx_hpd_irq_ack(dev_priv);
4478 i9xx_hpd_irq_handler(dev_priv, hotplug_status);
4481 I915_WRITE(IIR, iir & ~flip_mask);
4482 new_iir = I915_READ(IIR); /* Flush posted writes */
4484 if (iir & I915_USER_INTERRUPT)
4485 notify_ring(&dev_priv->engine[RCS]);
4486 if (iir & I915_BSD_USER_INTERRUPT)
4487 notify_ring(&dev_priv->engine[VCS]);
4489 for_each_pipe(dev_priv, pipe) {
4490 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
4491 i915_handle_vblank(dev_priv, pipe, pipe, iir))
4492 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
4494 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
4497 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
4498 i9xx_pipe_crc_irq_handler(dev_priv, pipe);
4500 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
4501 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
4504 if (blc_event || (iir & I915_ASLE_INTERRUPT))
4505 intel_opregion_asle_intr(dev_priv);
4507 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
4508 gmbus_irq_handler(dev_priv);
4510 /* With MSI, interrupts are only generated when iir
4511 * transitions from zero to nonzero. If another bit got
4512 * set while we were handling the existing iir bits, then
4513 * we would never get another interrupt.
4515 * This is fine on non-MSI as well, as if we hit this path
4516 * we avoid exiting the interrupt handler only to generate
4519 * Note that for MSI this could cause a stray interrupt report
4520 * if an interrupt landed in the time between writing IIR and
4521 * the posting read. This should be rare enough to never
4522 * trigger the 99% of 100,000 interrupts test for disabling
4528 enable_rpm_wakeref_asserts(dev_priv);
4533 static void i965_irq_uninstall(struct drm_device * dev)
4535 struct drm_i915_private *dev_priv = dev->dev_private;
4541 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4542 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4544 I915_WRITE(HWSTAM, 0xffffffff);
4545 for_each_pipe(dev_priv, pipe)
4546 I915_WRITE(PIPESTAT(pipe), 0);
4547 I915_WRITE(IMR, 0xffffffff);
4548 I915_WRITE(IER, 0x0);
4550 for_each_pipe(dev_priv, pipe)
4551 I915_WRITE(PIPESTAT(pipe),
4552 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
4553 I915_WRITE(IIR, I915_READ(IIR));
4557 * intel_irq_init - initializes irq support
4558 * @dev_priv: i915 device instance
4560 * This function initializes all the irq support including work items, timers
4561 * and all the vtables. It does not setup the interrupt itself though.
4563 void intel_irq_init(struct drm_i915_private *dev_priv)
4565 struct drm_device *dev = dev_priv->dev;
4567 intel_hpd_init_work(dev_priv);
4569 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
4570 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
4572 /* Let's track the enabled rps events */
4573 if (IS_VALLEYVIEW(dev_priv))
4574 /* WaGsvRC0ResidencyMethod:vlv */
4575 dev_priv->pm_rps_events = GEN6_PM_RP_DOWN_EI_EXPIRED | GEN6_PM_RP_UP_EI_EXPIRED;
4577 dev_priv->pm_rps_events = GEN6_PM_RPS_EVENTS;
4579 INIT_DELAYED_WORK(&dev_priv->gpu_error.hangcheck_work,
4580 i915_hangcheck_elapsed);
4582 if (IS_GEN2(dev_priv)) {
4583 dev->max_vblank_count = 0;
4584 dev->driver->get_vblank_counter = i8xx_get_vblank_counter;
4585 } else if (IS_G4X(dev_priv) || INTEL_INFO(dev_priv)->gen >= 5) {
4586 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
4587 dev->driver->get_vblank_counter = g4x_get_vblank_counter;
4589 dev->driver->get_vblank_counter = i915_get_vblank_counter;
4590 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
4594 * Opt out of the vblank disable timer on everything except gen2.
4595 * Gen2 doesn't have a hardware frame counter and so depends on
4596 * vblank interrupts to produce sane vblank seuquence numbers.
4598 if (!IS_GEN2(dev_priv))
4599 dev->vblank_disable_immediate = true;
4601 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
4602 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
4604 if (IS_CHERRYVIEW(dev_priv)) {
4605 dev->driver->irq_handler = cherryview_irq_handler;
4606 dev->driver->irq_preinstall = cherryview_irq_preinstall;
4607 dev->driver->irq_postinstall = cherryview_irq_postinstall;
4608 dev->driver->irq_uninstall = cherryview_irq_uninstall;
4609 dev->driver->enable_vblank = valleyview_enable_vblank;
4610 dev->driver->disable_vblank = valleyview_disable_vblank;
4611 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4612 } else if (IS_VALLEYVIEW(dev_priv)) {
4613 dev->driver->irq_handler = valleyview_irq_handler;
4614 dev->driver->irq_preinstall = valleyview_irq_preinstall;
4615 dev->driver->irq_postinstall = valleyview_irq_postinstall;
4616 dev->driver->irq_uninstall = valleyview_irq_uninstall;
4617 dev->driver->enable_vblank = valleyview_enable_vblank;
4618 dev->driver->disable_vblank = valleyview_disable_vblank;
4619 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4620 } else if (INTEL_INFO(dev_priv)->gen >= 8) {
4621 dev->driver->irq_handler = gen8_irq_handler;
4622 dev->driver->irq_preinstall = gen8_irq_reset;
4623 dev->driver->irq_postinstall = gen8_irq_postinstall;
4624 dev->driver->irq_uninstall = gen8_irq_uninstall;
4625 dev->driver->enable_vblank = gen8_enable_vblank;
4626 dev->driver->disable_vblank = gen8_disable_vblank;
4627 if (IS_BROXTON(dev))
4628 dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup;
4629 else if (HAS_PCH_SPT(dev))
4630 dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
4632 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4633 } else if (HAS_PCH_SPLIT(dev)) {
4634 dev->driver->irq_handler = ironlake_irq_handler;
4635 dev->driver->irq_preinstall = ironlake_irq_reset;
4636 dev->driver->irq_postinstall = ironlake_irq_postinstall;
4637 dev->driver->irq_uninstall = ironlake_irq_uninstall;
4638 dev->driver->enable_vblank = ironlake_enable_vblank;
4639 dev->driver->disable_vblank = ironlake_disable_vblank;
4640 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4642 if (IS_GEN2(dev_priv)) {
4643 dev->driver->irq_preinstall = i8xx_irq_preinstall;
4644 dev->driver->irq_postinstall = i8xx_irq_postinstall;
4645 dev->driver->irq_handler = i8xx_irq_handler;
4646 dev->driver->irq_uninstall = i8xx_irq_uninstall;
4647 } else if (IS_GEN3(dev_priv)) {
4648 dev->driver->irq_preinstall = i915_irq_preinstall;
4649 dev->driver->irq_postinstall = i915_irq_postinstall;
4650 dev->driver->irq_uninstall = i915_irq_uninstall;
4651 dev->driver->irq_handler = i915_irq_handler;
4653 dev->driver->irq_preinstall = i965_irq_preinstall;
4654 dev->driver->irq_postinstall = i965_irq_postinstall;
4655 dev->driver->irq_uninstall = i965_irq_uninstall;
4656 dev->driver->irq_handler = i965_irq_handler;
4658 if (I915_HAS_HOTPLUG(dev_priv))
4659 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4660 dev->driver->enable_vblank = i915_enable_vblank;
4661 dev->driver->disable_vblank = i915_disable_vblank;
4666 * intel_irq_install - enables the hardware interrupt
4667 * @dev_priv: i915 device instance
4669 * This function enables the hardware interrupt handling, but leaves the hotplug
4670 * handling still disabled. It is called after intel_irq_init().
4672 * In the driver load and resume code we need working interrupts in a few places
4673 * but don't want to deal with the hassle of concurrent probe and hotplug
4674 * workers. Hence the split into this two-stage approach.
4676 int intel_irq_install(struct drm_i915_private *dev_priv)
4679 * We enable some interrupt sources in our postinstall hooks, so mark
4680 * interrupts as enabled _before_ actually enabling them to avoid
4681 * special cases in our ordering checks.
4683 dev_priv->pm.irqs_enabled = true;
4685 return drm_irq_install(dev_priv->dev, dev_priv->dev->pdev->irq);
4689 * intel_irq_uninstall - finilizes all irq handling
4690 * @dev_priv: i915 device instance
4692 * This stops interrupt and hotplug handling and unregisters and frees all
4693 * resources acquired in the init functions.
4695 void intel_irq_uninstall(struct drm_i915_private *dev_priv)
4697 drm_irq_uninstall(dev_priv->dev);
4698 intel_hpd_cancel_work(dev_priv);
4699 dev_priv->pm.irqs_enabled = false;
4703 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling
4704 * @dev_priv: i915 device instance
4706 * This function is used to disable interrupts at runtime, both in the runtime
4707 * pm and the system suspend/resume code.
4709 void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv)
4711 dev_priv->dev->driver->irq_uninstall(dev_priv->dev);
4712 dev_priv->pm.irqs_enabled = false;
4713 synchronize_irq(dev_priv->dev->irq);
4717 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling
4718 * @dev_priv: i915 device instance
4720 * This function is used to enable interrupts at runtime, both in the runtime
4721 * pm and the system suspend/resume code.
4723 void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv)
4725 dev_priv->pm.irqs_enabled = true;
4726 dev_priv->dev->driver->irq_preinstall(dev_priv->dev);
4727 dev_priv->dev->driver->irq_postinstall(dev_priv->dev);