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, u32 reg)
144 u32 val = I915_READ(reg);
149 WARN(1, "Interrupt register 0x%x is not zero: 0x%08x\n",
151 I915_WRITE(reg, 0xffffffff);
153 I915_WRITE(reg, 0xffffffff);
157 #define GEN8_IRQ_INIT_NDX(type, which, imr_val, ier_val) do { \
158 gen5_assert_iir_is_zero(dev_priv, GEN8_##type##_IIR(which)); \
159 I915_WRITE(GEN8_##type##_IER(which), (ier_val)); \
160 I915_WRITE(GEN8_##type##_IMR(which), (imr_val)); \
161 POSTING_READ(GEN8_##type##_IMR(which)); \
164 #define GEN5_IRQ_INIT(type, imr_val, ier_val) do { \
165 gen5_assert_iir_is_zero(dev_priv, type##IIR); \
166 I915_WRITE(type##IER, (ier_val)); \
167 I915_WRITE(type##IMR, (imr_val)); \
168 POSTING_READ(type##IMR); \
171 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir);
173 /* For display hotplug interrupt */
175 i915_hotplug_interrupt_update_locked(struct drm_i915_private *dev_priv,
181 assert_spin_locked(&dev_priv->irq_lock);
182 WARN_ON(bits & ~mask);
184 val = I915_READ(PORT_HOTPLUG_EN);
187 I915_WRITE(PORT_HOTPLUG_EN, val);
191 * i915_hotplug_interrupt_update - update hotplug interrupt enable
192 * @dev_priv: driver private
193 * @mask: bits to update
194 * @bits: bits to enable
195 * NOTE: the HPD enable bits are modified both inside and outside
196 * of an interrupt context. To avoid that read-modify-write cycles
197 * interfer, these bits are protected by a spinlock. Since this
198 * function is usually not called from a context where the lock is
199 * held already, this function acquires the lock itself. A non-locking
200 * version is also available.
202 void i915_hotplug_interrupt_update(struct drm_i915_private *dev_priv,
206 spin_lock_irq(&dev_priv->irq_lock);
207 i915_hotplug_interrupt_update_locked(dev_priv, mask, bits);
208 spin_unlock_irq(&dev_priv->irq_lock);
212 * ilk_update_display_irq - update DEIMR
213 * @dev_priv: driver private
214 * @interrupt_mask: mask of interrupt bits to update
215 * @enabled_irq_mask: mask of interrupt bits to enable
217 static void ilk_update_display_irq(struct drm_i915_private *dev_priv,
218 uint32_t interrupt_mask,
219 uint32_t enabled_irq_mask)
223 assert_spin_locked(&dev_priv->irq_lock);
225 WARN_ON(enabled_irq_mask & ~interrupt_mask);
227 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
230 new_val = dev_priv->irq_mask;
231 new_val &= ~interrupt_mask;
232 new_val |= (~enabled_irq_mask & interrupt_mask);
234 if (new_val != dev_priv->irq_mask) {
235 dev_priv->irq_mask = new_val;
236 I915_WRITE(DEIMR, dev_priv->irq_mask);
242 ironlake_enable_display_irq(struct drm_i915_private *dev_priv, u32 mask)
244 ilk_update_display_irq(dev_priv, mask, mask);
248 ironlake_disable_display_irq(struct drm_i915_private *dev_priv, u32 mask)
250 ilk_update_display_irq(dev_priv, mask, 0);
254 * ilk_update_gt_irq - update GTIMR
255 * @dev_priv: driver private
256 * @interrupt_mask: mask of interrupt bits to update
257 * @enabled_irq_mask: mask of interrupt bits to enable
259 static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
260 uint32_t interrupt_mask,
261 uint32_t enabled_irq_mask)
263 assert_spin_locked(&dev_priv->irq_lock);
265 WARN_ON(enabled_irq_mask & ~interrupt_mask);
267 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
270 dev_priv->gt_irq_mask &= ~interrupt_mask;
271 dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
272 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
276 void gen5_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
278 ilk_update_gt_irq(dev_priv, mask, mask);
281 void gen5_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
283 ilk_update_gt_irq(dev_priv, mask, 0);
286 static u32 gen6_pm_iir(struct drm_i915_private *dev_priv)
288 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IIR(2) : GEN6_PMIIR;
291 static u32 gen6_pm_imr(struct drm_i915_private *dev_priv)
293 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IMR(2) : GEN6_PMIMR;
296 static u32 gen6_pm_ier(struct drm_i915_private *dev_priv)
298 return INTEL_INFO(dev_priv)->gen >= 8 ? GEN8_GT_IER(2) : GEN6_PMIER;
302 * snb_update_pm_irq - update GEN6_PMIMR
303 * @dev_priv: driver private
304 * @interrupt_mask: mask of interrupt bits to update
305 * @enabled_irq_mask: mask of interrupt bits to enable
307 static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
308 uint32_t interrupt_mask,
309 uint32_t enabled_irq_mask)
313 WARN_ON(enabled_irq_mask & ~interrupt_mask);
315 assert_spin_locked(&dev_priv->irq_lock);
317 new_val = dev_priv->pm_irq_mask;
318 new_val &= ~interrupt_mask;
319 new_val |= (~enabled_irq_mask & interrupt_mask);
321 if (new_val != dev_priv->pm_irq_mask) {
322 dev_priv->pm_irq_mask = new_val;
323 I915_WRITE(gen6_pm_imr(dev_priv), dev_priv->pm_irq_mask);
324 POSTING_READ(gen6_pm_imr(dev_priv));
328 void gen6_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
330 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
333 snb_update_pm_irq(dev_priv, mask, mask);
336 static void __gen6_disable_pm_irq(struct drm_i915_private *dev_priv,
339 snb_update_pm_irq(dev_priv, mask, 0);
342 void gen6_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
344 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
347 __gen6_disable_pm_irq(dev_priv, mask);
350 void gen6_reset_rps_interrupts(struct drm_device *dev)
352 struct drm_i915_private *dev_priv = dev->dev_private;
353 uint32_t reg = gen6_pm_iir(dev_priv);
355 spin_lock_irq(&dev_priv->irq_lock);
356 I915_WRITE(reg, dev_priv->pm_rps_events);
357 I915_WRITE(reg, dev_priv->pm_rps_events);
359 dev_priv->rps.pm_iir = 0;
360 spin_unlock_irq(&dev_priv->irq_lock);
363 void gen6_enable_rps_interrupts(struct drm_device *dev)
365 struct drm_i915_private *dev_priv = dev->dev_private;
367 spin_lock_irq(&dev_priv->irq_lock);
369 WARN_ON(dev_priv->rps.pm_iir);
370 WARN_ON(I915_READ(gen6_pm_iir(dev_priv)) & dev_priv->pm_rps_events);
371 dev_priv->rps.interrupts_enabled = true;
372 I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) |
373 dev_priv->pm_rps_events);
374 gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
376 spin_unlock_irq(&dev_priv->irq_lock);
379 u32 gen6_sanitize_rps_pm_mask(struct drm_i915_private *dev_priv, u32 mask)
382 * SNB,IVB can while VLV,CHV may hard hang on looping batchbuffer
383 * if GEN6_PM_UP_EI_EXPIRED is masked.
385 * TODO: verify if this can be reproduced on VLV,CHV.
387 if (INTEL_INFO(dev_priv)->gen <= 7 && !IS_HASWELL(dev_priv))
388 mask &= ~GEN6_PM_RP_UP_EI_EXPIRED;
390 if (INTEL_INFO(dev_priv)->gen >= 8)
391 mask &= ~GEN8_PMINTR_REDIRECT_TO_NON_DISP;
396 void gen6_disable_rps_interrupts(struct drm_device *dev)
398 struct drm_i915_private *dev_priv = dev->dev_private;
400 spin_lock_irq(&dev_priv->irq_lock);
401 dev_priv->rps.interrupts_enabled = false;
402 spin_unlock_irq(&dev_priv->irq_lock);
404 cancel_work_sync(&dev_priv->rps.work);
406 spin_lock_irq(&dev_priv->irq_lock);
408 I915_WRITE(GEN6_PMINTRMSK, gen6_sanitize_rps_pm_mask(dev_priv, ~0));
410 __gen6_disable_pm_irq(dev_priv, dev_priv->pm_rps_events);
411 I915_WRITE(gen6_pm_ier(dev_priv), I915_READ(gen6_pm_ier(dev_priv)) &
412 ~dev_priv->pm_rps_events);
414 spin_unlock_irq(&dev_priv->irq_lock);
416 synchronize_irq(dev->irq);
420 * bdw_update_port_irq - update DE port interrupt
421 * @dev_priv: driver private
422 * @interrupt_mask: mask of interrupt bits to update
423 * @enabled_irq_mask: mask of interrupt bits to enable
425 static void bdw_update_port_irq(struct drm_i915_private *dev_priv,
426 uint32_t interrupt_mask,
427 uint32_t enabled_irq_mask)
432 assert_spin_locked(&dev_priv->irq_lock);
434 WARN_ON(enabled_irq_mask & ~interrupt_mask);
436 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
439 old_val = I915_READ(GEN8_DE_PORT_IMR);
442 new_val &= ~interrupt_mask;
443 new_val |= (~enabled_irq_mask & interrupt_mask);
445 if (new_val != old_val) {
446 I915_WRITE(GEN8_DE_PORT_IMR, new_val);
447 POSTING_READ(GEN8_DE_PORT_IMR);
452 * ibx_display_interrupt_update - update SDEIMR
453 * @dev_priv: driver private
454 * @interrupt_mask: mask of interrupt bits to update
455 * @enabled_irq_mask: mask of interrupt bits to enable
457 void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
458 uint32_t interrupt_mask,
459 uint32_t enabled_irq_mask)
461 uint32_t sdeimr = I915_READ(SDEIMR);
462 sdeimr &= ~interrupt_mask;
463 sdeimr |= (~enabled_irq_mask & interrupt_mask);
465 WARN_ON(enabled_irq_mask & ~interrupt_mask);
467 assert_spin_locked(&dev_priv->irq_lock);
469 if (WARN_ON(!intel_irqs_enabled(dev_priv)))
472 I915_WRITE(SDEIMR, sdeimr);
473 POSTING_READ(SDEIMR);
477 __i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
478 u32 enable_mask, u32 status_mask)
480 u32 reg = PIPESTAT(pipe);
481 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
483 assert_spin_locked(&dev_priv->irq_lock);
484 WARN_ON(!intel_irqs_enabled(dev_priv));
486 if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
487 status_mask & ~PIPESTAT_INT_STATUS_MASK,
488 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
489 pipe_name(pipe), enable_mask, status_mask))
492 if ((pipestat & enable_mask) == enable_mask)
495 dev_priv->pipestat_irq_mask[pipe] |= status_mask;
497 /* Enable the interrupt, clear any pending status */
498 pipestat |= enable_mask | status_mask;
499 I915_WRITE(reg, pipestat);
504 __i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
505 u32 enable_mask, u32 status_mask)
507 u32 reg = PIPESTAT(pipe);
508 u32 pipestat = I915_READ(reg) & PIPESTAT_INT_ENABLE_MASK;
510 assert_spin_locked(&dev_priv->irq_lock);
511 WARN_ON(!intel_irqs_enabled(dev_priv));
513 if (WARN_ONCE(enable_mask & ~PIPESTAT_INT_ENABLE_MASK ||
514 status_mask & ~PIPESTAT_INT_STATUS_MASK,
515 "pipe %c: enable_mask=0x%x, status_mask=0x%x\n",
516 pipe_name(pipe), enable_mask, status_mask))
519 if ((pipestat & enable_mask) == 0)
522 dev_priv->pipestat_irq_mask[pipe] &= ~status_mask;
524 pipestat &= ~enable_mask;
525 I915_WRITE(reg, pipestat);
529 static u32 vlv_get_pipestat_enable_mask(struct drm_device *dev, u32 status_mask)
531 u32 enable_mask = status_mask << 16;
534 * On pipe A we don't support the PSR interrupt yet,
535 * on pipe B and C the same bit MBZ.
537 if (WARN_ON_ONCE(status_mask & PIPE_A_PSR_STATUS_VLV))
540 * On pipe B and C we don't support the PSR interrupt yet, on pipe
541 * A the same bit is for perf counters which we don't use either.
543 if (WARN_ON_ONCE(status_mask & PIPE_B_PSR_STATUS_VLV))
546 enable_mask &= ~(PIPE_FIFO_UNDERRUN_STATUS |
547 SPRITE0_FLIP_DONE_INT_EN_VLV |
548 SPRITE1_FLIP_DONE_INT_EN_VLV);
549 if (status_mask & SPRITE0_FLIP_DONE_INT_STATUS_VLV)
550 enable_mask |= SPRITE0_FLIP_DONE_INT_EN_VLV;
551 if (status_mask & SPRITE1_FLIP_DONE_INT_STATUS_VLV)
552 enable_mask |= SPRITE1_FLIP_DONE_INT_EN_VLV;
558 i915_enable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
563 if (IS_VALLEYVIEW(dev_priv->dev))
564 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
567 enable_mask = status_mask << 16;
568 __i915_enable_pipestat(dev_priv, pipe, enable_mask, status_mask);
572 i915_disable_pipestat(struct drm_i915_private *dev_priv, enum pipe pipe,
577 if (IS_VALLEYVIEW(dev_priv->dev))
578 enable_mask = vlv_get_pipestat_enable_mask(dev_priv->dev,
581 enable_mask = status_mask << 16;
582 __i915_disable_pipestat(dev_priv, pipe, enable_mask, status_mask);
586 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
589 static void i915_enable_asle_pipestat(struct drm_device *dev)
591 struct drm_i915_private *dev_priv = dev->dev_private;
593 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
596 spin_lock_irq(&dev_priv->irq_lock);
598 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_STATUS);
599 if (INTEL_INFO(dev)->gen >= 4)
600 i915_enable_pipestat(dev_priv, PIPE_A,
601 PIPE_LEGACY_BLC_EVENT_STATUS);
603 spin_unlock_irq(&dev_priv->irq_lock);
607 * This timing diagram depicts the video signal in and
608 * around the vertical blanking period.
610 * Assumptions about the fictitious mode used in this example:
612 * vsync_start = vblank_start + 1
613 * vsync_end = vblank_start + 2
614 * vtotal = vblank_start + 3
617 * latch double buffered registers
618 * increment frame counter (ctg+)
619 * generate start of vblank interrupt (gen4+)
622 * | generate frame start interrupt (aka. vblank interrupt) (gmch)
623 * | may be shifted forward 1-3 extra lines via PIPECONF
625 * | | start of vsync:
626 * | | generate vsync interrupt
628 * ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx___ ___xxxx
629 * . \hs/ . \hs/ \hs/ \hs/ . \hs/
630 * ----va---> <-----------------vb--------------------> <--------va-------------
631 * | | <----vs-----> |
632 * -vbs-----> <---vbs+1---> <---vbs+2---> <-----0-----> <-----1-----> <-----2--- (scanline counter gen2)
633 * -vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2---> <-----0--- (scanline counter gen3+)
634 * -vbs-2---> <---vbs-2---> <---vbs-1---> <---vbs-----> <---vbs+1---> <---vbs+2- (scanline counter hsw+ hdmi)
636 * last visible pixel first visible pixel
637 * | increment frame counter (gen3/4)
638 * pixel counter = vblank_start * htotal pixel counter = 0 (gen3/4)
640 * x = horizontal active
641 * _ = horizontal blanking
642 * hs = horizontal sync
643 * va = vertical active
644 * vb = vertical blanking
646 * vbs = vblank_start (number)
649 * - most events happen at the start of horizontal sync
650 * - frame start happens at the start of horizontal blank, 1-4 lines
651 * (depending on PIPECONF settings) after the start of vblank
652 * - gen3/4 pixel and frame counter are synchronized with the start
653 * of horizontal active on the first line of vertical active
656 static u32 i8xx_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
658 /* Gen2 doesn't have a hardware frame counter */
662 /* Called from drm generic code, passed a 'crtc', which
663 * we use as a pipe index
665 static u32 i915_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
667 struct drm_i915_private *dev_priv = dev->dev_private;
668 unsigned long high_frame;
669 unsigned long low_frame;
670 u32 high1, high2, low, pixel, vbl_start, hsync_start, htotal;
671 struct intel_crtc *intel_crtc =
672 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
673 const struct drm_display_mode *mode = &intel_crtc->base.hwmode;
675 htotal = mode->crtc_htotal;
676 hsync_start = mode->crtc_hsync_start;
677 vbl_start = mode->crtc_vblank_start;
678 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
679 vbl_start = DIV_ROUND_UP(vbl_start, 2);
681 /* Convert to pixel count */
684 /* Start of vblank event occurs at start of hsync */
685 vbl_start -= htotal - hsync_start;
687 high_frame = PIPEFRAME(pipe);
688 low_frame = PIPEFRAMEPIXEL(pipe);
691 * High & low register fields aren't synchronized, so make sure
692 * we get a low value that's stable across two reads of the high
696 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
697 low = I915_READ(low_frame);
698 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
699 } while (high1 != high2);
701 high1 >>= PIPE_FRAME_HIGH_SHIFT;
702 pixel = low & PIPE_PIXEL_MASK;
703 low >>= PIPE_FRAME_LOW_SHIFT;
706 * The frame counter increments at beginning of active.
707 * Cook up a vblank counter by also checking the pixel
708 * counter against vblank start.
710 return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
713 static u32 g4x_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
715 struct drm_i915_private *dev_priv = dev->dev_private;
717 return I915_READ(PIPE_FRMCOUNT_G4X(pipe));
720 /* raw reads, only for fast reads of display block, no need for forcewake etc. */
721 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
723 static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
725 struct drm_device *dev = crtc->base.dev;
726 struct drm_i915_private *dev_priv = dev->dev_private;
727 const struct drm_display_mode *mode = &crtc->base.hwmode;
728 enum pipe pipe = crtc->pipe;
729 int position, vtotal;
731 vtotal = mode->crtc_vtotal;
732 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
736 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
738 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
741 * On HSW, the DSL reg (0x70000) appears to return 0 if we
742 * read it just before the start of vblank. So try it again
743 * so we don't accidentally end up spanning a vblank frame
744 * increment, causing the pipe_update_end() code to squak at us.
746 * The nature of this problem means we can't simply check the ISR
747 * bit and return the vblank start value; nor can we use the scanline
748 * debug register in the transcoder as it appears to have the same
749 * problem. We may need to extend this to include other platforms,
750 * but so far testing only shows the problem on HSW.
752 if (HAS_DDI(dev) && !position) {
755 for (i = 0; i < 100; i++) {
757 temp = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) &
759 if (temp != position) {
767 * See update_scanline_offset() for the details on the
768 * scanline_offset adjustment.
770 return (position + crtc->scanline_offset) % vtotal;
773 static int i915_get_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
774 unsigned int flags, int *vpos, int *hpos,
775 ktime_t *stime, ktime_t *etime,
776 const struct drm_display_mode *mode)
778 struct drm_i915_private *dev_priv = dev->dev_private;
779 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
780 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
782 int vbl_start, vbl_end, hsync_start, htotal, vtotal;
785 unsigned long irqflags;
787 if (WARN_ON(!mode->crtc_clock)) {
788 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
789 "pipe %c\n", pipe_name(pipe));
793 htotal = mode->crtc_htotal;
794 hsync_start = mode->crtc_hsync_start;
795 vtotal = mode->crtc_vtotal;
796 vbl_start = mode->crtc_vblank_start;
797 vbl_end = mode->crtc_vblank_end;
799 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
800 vbl_start = DIV_ROUND_UP(vbl_start, 2);
805 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
808 * Lock uncore.lock, as we will do multiple timing critical raw
809 * register reads, potentially with preemption disabled, so the
810 * following code must not block on uncore.lock.
812 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
814 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
816 /* Get optional system timestamp before query. */
818 *stime = ktime_get();
820 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
821 /* No obvious pixelcount register. Only query vertical
822 * scanout position from Display scan line register.
824 position = __intel_get_crtc_scanline(intel_crtc);
826 /* Have access to pixelcount since start of frame.
827 * We can split this into vertical and horizontal
830 position = (__raw_i915_read32(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
832 /* convert to pixel counts */
838 * In interlaced modes, the pixel counter counts all pixels,
839 * so one field will have htotal more pixels. In order to avoid
840 * the reported position from jumping backwards when the pixel
841 * counter is beyond the length of the shorter field, just
842 * clamp the position the length of the shorter field. This
843 * matches how the scanline counter based position works since
844 * the scanline counter doesn't count the two half lines.
846 if (position >= vtotal)
847 position = vtotal - 1;
850 * Start of vblank interrupt is triggered at start of hsync,
851 * just prior to the first active line of vblank. However we
852 * consider lines to start at the leading edge of horizontal
853 * active. So, should we get here before we've crossed into
854 * the horizontal active of the first line in vblank, we would
855 * not set the DRM_SCANOUTPOS_INVBL flag. In order to fix that,
856 * always add htotal-hsync_start to the current pixel position.
858 position = (position + htotal - hsync_start) % vtotal;
861 /* Get optional system timestamp after query. */
863 *etime = ktime_get();
865 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
867 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
869 in_vbl = position >= vbl_start && position < vbl_end;
872 * While in vblank, position will be negative
873 * counting up towards 0 at vbl_end. And outside
874 * vblank, position will be positive counting
877 if (position >= vbl_start)
880 position += vtotal - vbl_end;
882 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
886 *vpos = position / htotal;
887 *hpos = position - (*vpos * htotal);
892 ret |= DRM_SCANOUTPOS_IN_VBLANK;
897 int intel_get_crtc_scanline(struct intel_crtc *crtc)
899 struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
900 unsigned long irqflags;
903 spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
904 position = __intel_get_crtc_scanline(crtc);
905 spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
910 static int i915_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
912 struct timeval *vblank_time,
915 struct drm_crtc *crtc;
917 if (pipe >= INTEL_INFO(dev)->num_pipes) {
918 DRM_ERROR("Invalid crtc %u\n", pipe);
922 /* Get drm_crtc to timestamp: */
923 crtc = intel_get_crtc_for_pipe(dev, pipe);
925 DRM_ERROR("Invalid crtc %u\n", pipe);
929 if (!crtc->hwmode.crtc_clock) {
930 DRM_DEBUG_KMS("crtc %u is disabled\n", pipe);
934 /* Helper routine in DRM core does all the work: */
935 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
940 static void ironlake_rps_change_irq_handler(struct drm_device *dev)
942 struct drm_i915_private *dev_priv = dev->dev_private;
943 u32 busy_up, busy_down, max_avg, min_avg;
946 spin_lock(&mchdev_lock);
948 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
950 new_delay = dev_priv->ips.cur_delay;
952 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
953 busy_up = I915_READ(RCPREVBSYTUPAVG);
954 busy_down = I915_READ(RCPREVBSYTDNAVG);
955 max_avg = I915_READ(RCBMAXAVG);
956 min_avg = I915_READ(RCBMINAVG);
958 /* Handle RCS change request from hw */
959 if (busy_up > max_avg) {
960 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
961 new_delay = dev_priv->ips.cur_delay - 1;
962 if (new_delay < dev_priv->ips.max_delay)
963 new_delay = dev_priv->ips.max_delay;
964 } else if (busy_down < min_avg) {
965 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
966 new_delay = dev_priv->ips.cur_delay + 1;
967 if (new_delay > dev_priv->ips.min_delay)
968 new_delay = dev_priv->ips.min_delay;
971 if (ironlake_set_drps(dev, new_delay))
972 dev_priv->ips.cur_delay = new_delay;
974 spin_unlock(&mchdev_lock);
979 static void notify_ring(struct intel_engine_cs *ring)
981 if (!intel_ring_initialized(ring))
984 trace_i915_gem_request_notify(ring);
986 wake_up_all(&ring->irq_queue);
989 static void vlv_c0_read(struct drm_i915_private *dev_priv,
990 struct intel_rps_ei *ei)
992 ei->cz_clock = vlv_punit_read(dev_priv, PUNIT_REG_CZ_TIMESTAMP);
993 ei->render_c0 = I915_READ(VLV_RENDER_C0_COUNT);
994 ei->media_c0 = I915_READ(VLV_MEDIA_C0_COUNT);
997 static bool vlv_c0_above(struct drm_i915_private *dev_priv,
998 const struct intel_rps_ei *old,
999 const struct intel_rps_ei *now,
1003 unsigned int mul = 100;
1005 if (old->cz_clock == 0)
1008 if (I915_READ(VLV_COUNTER_CONTROL) & VLV_COUNT_RANGE_HIGH)
1011 time = now->cz_clock - old->cz_clock;
1012 time *= threshold * dev_priv->czclk_freq;
1014 /* Workload can be split between render + media, e.g. SwapBuffers
1015 * being blitted in X after being rendered in mesa. To account for
1016 * this we need to combine both engines into our activity counter.
1018 c0 = now->render_c0 - old->render_c0;
1019 c0 += now->media_c0 - old->media_c0;
1020 c0 *= mul * VLV_CZ_CLOCK_TO_MILLI_SEC;
1025 void gen6_rps_reset_ei(struct drm_i915_private *dev_priv)
1027 vlv_c0_read(dev_priv, &dev_priv->rps.down_ei);
1028 dev_priv->rps.up_ei = dev_priv->rps.down_ei;
1031 static u32 vlv_wa_c0_ei(struct drm_i915_private *dev_priv, u32 pm_iir)
1033 struct intel_rps_ei now;
1036 if ((pm_iir & (GEN6_PM_RP_DOWN_EI_EXPIRED | GEN6_PM_RP_UP_EI_EXPIRED)) == 0)
1039 vlv_c0_read(dev_priv, &now);
1040 if (now.cz_clock == 0)
1043 if (pm_iir & GEN6_PM_RP_DOWN_EI_EXPIRED) {
1044 if (!vlv_c0_above(dev_priv,
1045 &dev_priv->rps.down_ei, &now,
1046 dev_priv->rps.down_threshold))
1047 events |= GEN6_PM_RP_DOWN_THRESHOLD;
1048 dev_priv->rps.down_ei = now;
1051 if (pm_iir & GEN6_PM_RP_UP_EI_EXPIRED) {
1052 if (vlv_c0_above(dev_priv,
1053 &dev_priv->rps.up_ei, &now,
1054 dev_priv->rps.up_threshold))
1055 events |= GEN6_PM_RP_UP_THRESHOLD;
1056 dev_priv->rps.up_ei = now;
1062 static bool any_waiters(struct drm_i915_private *dev_priv)
1064 struct intel_engine_cs *ring;
1067 for_each_ring(ring, dev_priv, i)
1068 if (ring->irq_refcount)
1074 static void gen6_pm_rps_work(struct work_struct *work)
1076 struct drm_i915_private *dev_priv =
1077 container_of(work, struct drm_i915_private, rps.work);
1079 int new_delay, adj, min, max;
1082 spin_lock_irq(&dev_priv->irq_lock);
1083 /* Speed up work cancelation during disabling rps interrupts. */
1084 if (!dev_priv->rps.interrupts_enabled) {
1085 spin_unlock_irq(&dev_priv->irq_lock);
1088 pm_iir = dev_priv->rps.pm_iir;
1089 dev_priv->rps.pm_iir = 0;
1090 /* Make sure not to corrupt PMIMR state used by ringbuffer on GEN6 */
1091 gen6_enable_pm_irq(dev_priv, dev_priv->pm_rps_events);
1092 client_boost = dev_priv->rps.client_boost;
1093 dev_priv->rps.client_boost = false;
1094 spin_unlock_irq(&dev_priv->irq_lock);
1096 /* Make sure we didn't queue anything we're not going to process. */
1097 WARN_ON(pm_iir & ~dev_priv->pm_rps_events);
1099 if ((pm_iir & dev_priv->pm_rps_events) == 0 && !client_boost)
1102 mutex_lock(&dev_priv->rps.hw_lock);
1104 pm_iir |= vlv_wa_c0_ei(dev_priv, pm_iir);
1106 adj = dev_priv->rps.last_adj;
1107 new_delay = dev_priv->rps.cur_freq;
1108 min = dev_priv->rps.min_freq_softlimit;
1109 max = dev_priv->rps.max_freq_softlimit;
1112 new_delay = dev_priv->rps.max_freq_softlimit;
1114 } else if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
1117 else /* CHV needs even encode values */
1118 adj = IS_CHERRYVIEW(dev_priv) ? 2 : 1;
1120 * For better performance, jump directly
1121 * to RPe if we're below it.
1123 if (new_delay < dev_priv->rps.efficient_freq - adj) {
1124 new_delay = dev_priv->rps.efficient_freq;
1127 } else if (any_waiters(dev_priv)) {
1129 } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
1130 if (dev_priv->rps.cur_freq > dev_priv->rps.efficient_freq)
1131 new_delay = dev_priv->rps.efficient_freq;
1133 new_delay = dev_priv->rps.min_freq_softlimit;
1135 } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {
1138 else /* CHV needs even encode values */
1139 adj = IS_CHERRYVIEW(dev_priv) ? -2 : -1;
1140 } else { /* unknown event */
1144 dev_priv->rps.last_adj = adj;
1146 /* sysfs frequency interfaces may have snuck in while servicing the
1150 new_delay = clamp_t(int, new_delay, min, max);
1152 intel_set_rps(dev_priv->dev, new_delay);
1154 mutex_unlock(&dev_priv->rps.hw_lock);
1159 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1161 * @work: workqueue struct
1163 * Doesn't actually do anything except notify userspace. As a consequence of
1164 * this event, userspace should try to remap the bad rows since statistically
1165 * it is likely the same row is more likely to go bad again.
1167 static void ivybridge_parity_work(struct work_struct *work)
1169 struct drm_i915_private *dev_priv =
1170 container_of(work, struct drm_i915_private, l3_parity.error_work);
1171 u32 error_status, row, bank, subbank;
1172 char *parity_event[6];
1176 /* We must turn off DOP level clock gating to access the L3 registers.
1177 * In order to prevent a get/put style interface, acquire struct mutex
1178 * any time we access those registers.
1180 mutex_lock(&dev_priv->dev->struct_mutex);
1182 /* If we've screwed up tracking, just let the interrupt fire again */
1183 if (WARN_ON(!dev_priv->l3_parity.which_slice))
1186 misccpctl = I915_READ(GEN7_MISCCPCTL);
1187 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
1188 POSTING_READ(GEN7_MISCCPCTL);
1190 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
1194 if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv->dev)))
1197 dev_priv->l3_parity.which_slice &= ~(1<<slice);
1199 reg = GEN7_L3CDERRST1 + (slice * 0x200);
1201 error_status = I915_READ(reg);
1202 row = GEN7_PARITY_ERROR_ROW(error_status);
1203 bank = GEN7_PARITY_ERROR_BANK(error_status);
1204 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
1206 I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
1209 parity_event[0] = I915_L3_PARITY_UEVENT "=1";
1210 parity_event[1] = kasprintf(GFP_KERNEL, "ROW=%d", row);
1211 parity_event[2] = kasprintf(GFP_KERNEL, "BANK=%d", bank);
1212 parity_event[3] = kasprintf(GFP_KERNEL, "SUBBANK=%d", subbank);
1213 parity_event[4] = kasprintf(GFP_KERNEL, "SLICE=%d", slice);
1214 parity_event[5] = NULL;
1216 kobject_uevent_env(&dev_priv->dev->primary->kdev->kobj,
1217 KOBJ_CHANGE, parity_event);
1219 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1220 slice, row, bank, subbank);
1222 kfree(parity_event[4]);
1223 kfree(parity_event[3]);
1224 kfree(parity_event[2]);
1225 kfree(parity_event[1]);
1228 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
1231 WARN_ON(dev_priv->l3_parity.which_slice);
1232 spin_lock_irq(&dev_priv->irq_lock);
1233 gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv->dev));
1234 spin_unlock_irq(&dev_priv->irq_lock);
1236 mutex_unlock(&dev_priv->dev->struct_mutex);
1239 static void ivybridge_parity_error_irq_handler(struct drm_device *dev, u32 iir)
1241 struct drm_i915_private *dev_priv = dev->dev_private;
1243 if (!HAS_L3_DPF(dev))
1246 spin_lock(&dev_priv->irq_lock);
1247 gen5_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev));
1248 spin_unlock(&dev_priv->irq_lock);
1250 iir &= GT_PARITY_ERROR(dev);
1251 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
1252 dev_priv->l3_parity.which_slice |= 1 << 1;
1254 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
1255 dev_priv->l3_parity.which_slice |= 1 << 0;
1257 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
1260 static void ilk_gt_irq_handler(struct drm_device *dev,
1261 struct drm_i915_private *dev_priv,
1265 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1266 notify_ring(&dev_priv->ring[RCS]);
1267 if (gt_iir & ILK_BSD_USER_INTERRUPT)
1268 notify_ring(&dev_priv->ring[VCS]);
1271 static void snb_gt_irq_handler(struct drm_device *dev,
1272 struct drm_i915_private *dev_priv,
1277 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1278 notify_ring(&dev_priv->ring[RCS]);
1279 if (gt_iir & GT_BSD_USER_INTERRUPT)
1280 notify_ring(&dev_priv->ring[VCS]);
1281 if (gt_iir & GT_BLT_USER_INTERRUPT)
1282 notify_ring(&dev_priv->ring[BCS]);
1284 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
1285 GT_BSD_CS_ERROR_INTERRUPT |
1286 GT_RENDER_CS_MASTER_ERROR_INTERRUPT))
1287 DRM_DEBUG("Command parser error, gt_iir 0x%08x\n", gt_iir);
1289 if (gt_iir & GT_PARITY_ERROR(dev))
1290 ivybridge_parity_error_irq_handler(dev, gt_iir);
1293 static irqreturn_t gen8_gt_irq_handler(struct drm_i915_private *dev_priv,
1296 irqreturn_t ret = IRQ_NONE;
1298 if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
1299 u32 tmp = I915_READ_FW(GEN8_GT_IIR(0));
1301 I915_WRITE_FW(GEN8_GT_IIR(0), tmp);
1304 if (tmp & (GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT))
1305 intel_lrc_irq_handler(&dev_priv->ring[RCS]);
1306 if (tmp & (GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT))
1307 notify_ring(&dev_priv->ring[RCS]);
1309 if (tmp & (GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT))
1310 intel_lrc_irq_handler(&dev_priv->ring[BCS]);
1311 if (tmp & (GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT))
1312 notify_ring(&dev_priv->ring[BCS]);
1314 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1317 if (master_ctl & (GEN8_GT_VCS1_IRQ | GEN8_GT_VCS2_IRQ)) {
1318 u32 tmp = I915_READ_FW(GEN8_GT_IIR(1));
1320 I915_WRITE_FW(GEN8_GT_IIR(1), tmp);
1323 if (tmp & (GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT))
1324 intel_lrc_irq_handler(&dev_priv->ring[VCS]);
1325 if (tmp & (GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT))
1326 notify_ring(&dev_priv->ring[VCS]);
1328 if (tmp & (GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT))
1329 intel_lrc_irq_handler(&dev_priv->ring[VCS2]);
1330 if (tmp & (GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT))
1331 notify_ring(&dev_priv->ring[VCS2]);
1333 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1336 if (master_ctl & GEN8_GT_VECS_IRQ) {
1337 u32 tmp = I915_READ_FW(GEN8_GT_IIR(3));
1339 I915_WRITE_FW(GEN8_GT_IIR(3), tmp);
1342 if (tmp & (GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT))
1343 intel_lrc_irq_handler(&dev_priv->ring[VECS]);
1344 if (tmp & (GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT))
1345 notify_ring(&dev_priv->ring[VECS]);
1347 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1350 if (master_ctl & GEN8_GT_PM_IRQ) {
1351 u32 tmp = I915_READ_FW(GEN8_GT_IIR(2));
1352 if (tmp & dev_priv->pm_rps_events) {
1353 I915_WRITE_FW(GEN8_GT_IIR(2),
1354 tmp & dev_priv->pm_rps_events);
1356 gen6_rps_irq_handler(dev_priv, tmp);
1358 DRM_ERROR("The master control interrupt lied (PM)!\n");
1364 static bool bxt_port_hotplug_long_detect(enum port port, u32 val)
1368 return val & PORTA_HOTPLUG_LONG_DETECT;
1370 return val & PORTB_HOTPLUG_LONG_DETECT;
1372 return val & PORTC_HOTPLUG_LONG_DETECT;
1378 static bool spt_port_hotplug2_long_detect(enum port port, u32 val)
1382 return val & PORTE_HOTPLUG_LONG_DETECT;
1388 static bool spt_port_hotplug_long_detect(enum port port, u32 val)
1392 return val & PORTA_HOTPLUG_LONG_DETECT;
1394 return val & PORTB_HOTPLUG_LONG_DETECT;
1396 return val & PORTC_HOTPLUG_LONG_DETECT;
1398 return val & PORTD_HOTPLUG_LONG_DETECT;
1404 static bool ilk_port_hotplug_long_detect(enum port port, u32 val)
1408 return val & DIGITAL_PORTA_HOTPLUG_LONG_DETECT;
1414 static bool pch_port_hotplug_long_detect(enum port port, u32 val)
1418 return val & PORTB_HOTPLUG_LONG_DETECT;
1420 return val & PORTC_HOTPLUG_LONG_DETECT;
1422 return val & PORTD_HOTPLUG_LONG_DETECT;
1428 static bool i9xx_port_hotplug_long_detect(enum port port, u32 val)
1432 return val & PORTB_HOTPLUG_INT_LONG_PULSE;
1434 return val & PORTC_HOTPLUG_INT_LONG_PULSE;
1436 return val & PORTD_HOTPLUG_INT_LONG_PULSE;
1443 * Get a bit mask of pins that have triggered, and which ones may be long.
1444 * This can be called multiple times with the same masks to accumulate
1445 * hotplug detection results from several registers.
1447 * Note that the caller is expected to zero out the masks initially.
1449 static void intel_get_hpd_pins(u32 *pin_mask, u32 *long_mask,
1450 u32 hotplug_trigger, u32 dig_hotplug_reg,
1451 const u32 hpd[HPD_NUM_PINS],
1452 bool long_pulse_detect(enum port port, u32 val))
1457 for_each_hpd_pin(i) {
1458 if ((hpd[i] & hotplug_trigger) == 0)
1461 *pin_mask |= BIT(i);
1463 if (!intel_hpd_pin_to_port(i, &port))
1466 if (long_pulse_detect(port, dig_hotplug_reg))
1467 *long_mask |= BIT(i);
1470 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x, dig 0x%08x, pins 0x%08x\n",
1471 hotplug_trigger, dig_hotplug_reg, *pin_mask);
1475 static void gmbus_irq_handler(struct drm_device *dev)
1477 struct drm_i915_private *dev_priv = dev->dev_private;
1479 wake_up_all(&dev_priv->gmbus_wait_queue);
1482 static void dp_aux_irq_handler(struct drm_device *dev)
1484 struct drm_i915_private *dev_priv = dev->dev_private;
1486 wake_up_all(&dev_priv->gmbus_wait_queue);
1489 #if defined(CONFIG_DEBUG_FS)
1490 static void display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe,
1491 uint32_t crc0, uint32_t crc1,
1492 uint32_t crc2, uint32_t crc3,
1495 struct drm_i915_private *dev_priv = dev->dev_private;
1496 struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
1497 struct intel_pipe_crc_entry *entry;
1500 spin_lock(&pipe_crc->lock);
1502 if (!pipe_crc->entries) {
1503 spin_unlock(&pipe_crc->lock);
1504 DRM_DEBUG_KMS("spurious interrupt\n");
1508 head = pipe_crc->head;
1509 tail = pipe_crc->tail;
1511 if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) {
1512 spin_unlock(&pipe_crc->lock);
1513 DRM_ERROR("CRC buffer overflowing\n");
1517 entry = &pipe_crc->entries[head];
1519 entry->frame = dev->driver->get_vblank_counter(dev, pipe);
1520 entry->crc[0] = crc0;
1521 entry->crc[1] = crc1;
1522 entry->crc[2] = crc2;
1523 entry->crc[3] = crc3;
1524 entry->crc[4] = crc4;
1526 head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1);
1527 pipe_crc->head = head;
1529 spin_unlock(&pipe_crc->lock);
1531 wake_up_interruptible(&pipe_crc->wq);
1535 display_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe,
1536 uint32_t crc0, uint32_t crc1,
1537 uint32_t crc2, uint32_t crc3,
1542 static void hsw_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1544 struct drm_i915_private *dev_priv = dev->dev_private;
1546 display_pipe_crc_irq_handler(dev, pipe,
1547 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1551 static void ivb_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1553 struct drm_i915_private *dev_priv = dev->dev_private;
1555 display_pipe_crc_irq_handler(dev, pipe,
1556 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1557 I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
1558 I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
1559 I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
1560 I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
1563 static void i9xx_pipe_crc_irq_handler(struct drm_device *dev, enum pipe pipe)
1565 struct drm_i915_private *dev_priv = dev->dev_private;
1566 uint32_t res1, res2;
1568 if (INTEL_INFO(dev)->gen >= 3)
1569 res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
1573 if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
1574 res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
1578 display_pipe_crc_irq_handler(dev, pipe,
1579 I915_READ(PIPE_CRC_RES_RED(pipe)),
1580 I915_READ(PIPE_CRC_RES_GREEN(pipe)),
1581 I915_READ(PIPE_CRC_RES_BLUE(pipe)),
1585 /* The RPS events need forcewake, so we add them to a work queue and mask their
1586 * IMR bits until the work is done. Other interrupts can be processed without
1587 * the work queue. */
1588 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
1590 if (pm_iir & dev_priv->pm_rps_events) {
1591 spin_lock(&dev_priv->irq_lock);
1592 gen6_disable_pm_irq(dev_priv, pm_iir & dev_priv->pm_rps_events);
1593 if (dev_priv->rps.interrupts_enabled) {
1594 dev_priv->rps.pm_iir |= pm_iir & dev_priv->pm_rps_events;
1595 queue_work(dev_priv->wq, &dev_priv->rps.work);
1597 spin_unlock(&dev_priv->irq_lock);
1600 if (INTEL_INFO(dev_priv)->gen >= 8)
1603 if (HAS_VEBOX(dev_priv->dev)) {
1604 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
1605 notify_ring(&dev_priv->ring[VECS]);
1607 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT)
1608 DRM_DEBUG("Command parser error, pm_iir 0x%08x\n", pm_iir);
1612 static bool intel_pipe_handle_vblank(struct drm_device *dev, enum pipe pipe)
1614 if (!drm_handle_vblank(dev, pipe))
1620 static void valleyview_pipestat_irq_handler(struct drm_device *dev, u32 iir)
1622 struct drm_i915_private *dev_priv = dev->dev_private;
1623 u32 pipe_stats[I915_MAX_PIPES] = { };
1626 spin_lock(&dev_priv->irq_lock);
1627 for_each_pipe(dev_priv, pipe) {
1629 u32 mask, iir_bit = 0;
1632 * PIPESTAT bits get signalled even when the interrupt is
1633 * disabled with the mask bits, and some of the status bits do
1634 * not generate interrupts at all (like the underrun bit). Hence
1635 * we need to be careful that we only handle what we want to
1639 /* fifo underruns are filterered in the underrun handler. */
1640 mask = PIPE_FIFO_UNDERRUN_STATUS;
1644 iir_bit = I915_DISPLAY_PIPE_A_EVENT_INTERRUPT;
1647 iir_bit = I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
1650 iir_bit = I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
1654 mask |= dev_priv->pipestat_irq_mask[pipe];
1659 reg = PIPESTAT(pipe);
1660 mask |= PIPESTAT_INT_ENABLE_MASK;
1661 pipe_stats[pipe] = I915_READ(reg) & mask;
1664 * Clear the PIPE*STAT regs before the IIR
1666 if (pipe_stats[pipe] & (PIPE_FIFO_UNDERRUN_STATUS |
1667 PIPESTAT_INT_STATUS_MASK))
1668 I915_WRITE(reg, pipe_stats[pipe]);
1670 spin_unlock(&dev_priv->irq_lock);
1672 for_each_pipe(dev_priv, pipe) {
1673 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
1674 intel_pipe_handle_vblank(dev, pipe))
1675 intel_check_page_flip(dev, pipe);
1677 if (pipe_stats[pipe] & PLANE_FLIP_DONE_INT_STATUS_VLV) {
1678 intel_prepare_page_flip(dev, pipe);
1679 intel_finish_page_flip(dev, pipe);
1682 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1683 i9xx_pipe_crc_irq_handler(dev, pipe);
1685 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1686 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1689 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1690 gmbus_irq_handler(dev);
1693 static void i9xx_hpd_irq_handler(struct drm_device *dev)
1695 struct drm_i915_private *dev_priv = dev->dev_private;
1696 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1697 u32 pin_mask = 0, long_mask = 0;
1699 if (!hotplug_status)
1702 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1704 * Make sure hotplug status is cleared before we clear IIR, or else we
1705 * may miss hotplug events.
1707 POSTING_READ(PORT_HOTPLUG_STAT);
1709 if (IS_G4X(dev) || IS_VALLEYVIEW(dev)) {
1710 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_G4X;
1712 if (hotplug_trigger) {
1713 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
1714 hotplug_trigger, hpd_status_g4x,
1715 i9xx_port_hotplug_long_detect);
1717 intel_hpd_irq_handler(dev, pin_mask, long_mask);
1720 if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
1721 dp_aux_irq_handler(dev);
1723 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1725 if (hotplug_trigger) {
1726 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
1727 hotplug_trigger, hpd_status_i915,
1728 i9xx_port_hotplug_long_detect);
1729 intel_hpd_irq_handler(dev, pin_mask, long_mask);
1734 static irqreturn_t valleyview_irq_handler(int irq, void *arg)
1736 struct drm_device *dev = arg;
1737 struct drm_i915_private *dev_priv = dev->dev_private;
1738 u32 iir, gt_iir, pm_iir;
1739 irqreturn_t ret = IRQ_NONE;
1741 if (!intel_irqs_enabled(dev_priv))
1745 /* Find, clear, then process each source of interrupt */
1747 gt_iir = I915_READ(GTIIR);
1749 I915_WRITE(GTIIR, gt_iir);
1751 pm_iir = I915_READ(GEN6_PMIIR);
1753 I915_WRITE(GEN6_PMIIR, pm_iir);
1755 iir = I915_READ(VLV_IIR);
1757 /* Consume port before clearing IIR or we'll miss events */
1758 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1759 i9xx_hpd_irq_handler(dev);
1760 I915_WRITE(VLV_IIR, iir);
1763 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
1769 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1771 gen6_rps_irq_handler(dev_priv, pm_iir);
1772 /* Call regardless, as some status bits might not be
1773 * signalled in iir */
1774 valleyview_pipestat_irq_handler(dev, iir);
1781 static irqreturn_t cherryview_irq_handler(int irq, void *arg)
1783 struct drm_device *dev = arg;
1784 struct drm_i915_private *dev_priv = dev->dev_private;
1785 u32 master_ctl, iir;
1786 irqreturn_t ret = IRQ_NONE;
1788 if (!intel_irqs_enabled(dev_priv))
1792 master_ctl = I915_READ(GEN8_MASTER_IRQ) & ~GEN8_MASTER_IRQ_CONTROL;
1793 iir = I915_READ(VLV_IIR);
1795 if (master_ctl == 0 && iir == 0)
1800 I915_WRITE(GEN8_MASTER_IRQ, 0);
1802 /* Find, clear, then process each source of interrupt */
1805 /* Consume port before clearing IIR or we'll miss events */
1806 if (iir & I915_DISPLAY_PORT_INTERRUPT)
1807 i9xx_hpd_irq_handler(dev);
1808 I915_WRITE(VLV_IIR, iir);
1811 gen8_gt_irq_handler(dev_priv, master_ctl);
1813 /* Call regardless, as some status bits might not be
1814 * signalled in iir */
1815 valleyview_pipestat_irq_handler(dev, iir);
1817 I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
1818 POSTING_READ(GEN8_MASTER_IRQ);
1824 static void ibx_hpd_irq_handler(struct drm_device *dev, u32 hotplug_trigger,
1825 const u32 hpd[HPD_NUM_PINS])
1827 struct drm_i915_private *dev_priv = to_i915(dev);
1828 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
1830 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
1831 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
1833 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
1834 dig_hotplug_reg, hpd,
1835 pch_port_hotplug_long_detect);
1837 intel_hpd_irq_handler(dev, pin_mask, long_mask);
1840 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
1842 struct drm_i915_private *dev_priv = dev->dev_private;
1844 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1846 if (hotplug_trigger)
1847 ibx_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
1849 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1850 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1851 SDE_AUDIO_POWER_SHIFT);
1852 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1856 if (pch_iir & SDE_AUX_MASK)
1857 dp_aux_irq_handler(dev);
1859 if (pch_iir & SDE_GMBUS)
1860 gmbus_irq_handler(dev);
1862 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1863 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1865 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1866 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1868 if (pch_iir & SDE_POISON)
1869 DRM_ERROR("PCH poison interrupt\n");
1871 if (pch_iir & SDE_FDI_MASK)
1872 for_each_pipe(dev_priv, pipe)
1873 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1875 I915_READ(FDI_RX_IIR(pipe)));
1877 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1878 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1880 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1881 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1883 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1884 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
1886 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1887 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
1890 static void ivb_err_int_handler(struct drm_device *dev)
1892 struct drm_i915_private *dev_priv = dev->dev_private;
1893 u32 err_int = I915_READ(GEN7_ERR_INT);
1896 if (err_int & ERR_INT_POISON)
1897 DRM_ERROR("Poison interrupt\n");
1899 for_each_pipe(dev_priv, pipe) {
1900 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe))
1901 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
1903 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
1904 if (IS_IVYBRIDGE(dev))
1905 ivb_pipe_crc_irq_handler(dev, pipe);
1907 hsw_pipe_crc_irq_handler(dev, pipe);
1911 I915_WRITE(GEN7_ERR_INT, err_int);
1914 static void cpt_serr_int_handler(struct drm_device *dev)
1916 struct drm_i915_private *dev_priv = dev->dev_private;
1917 u32 serr_int = I915_READ(SERR_INT);
1919 if (serr_int & SERR_INT_POISON)
1920 DRM_ERROR("PCH poison interrupt\n");
1922 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
1923 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
1925 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
1926 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
1928 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
1929 intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_C);
1931 I915_WRITE(SERR_INT, serr_int);
1934 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
1936 struct drm_i915_private *dev_priv = dev->dev_private;
1938 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
1940 if (hotplug_trigger)
1941 ibx_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
1943 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1944 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1945 SDE_AUDIO_POWER_SHIFT_CPT);
1946 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1950 if (pch_iir & SDE_AUX_MASK_CPT)
1951 dp_aux_irq_handler(dev);
1953 if (pch_iir & SDE_GMBUS_CPT)
1954 gmbus_irq_handler(dev);
1956 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1957 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1959 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1960 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1962 if (pch_iir & SDE_FDI_MASK_CPT)
1963 for_each_pipe(dev_priv, pipe)
1964 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1966 I915_READ(FDI_RX_IIR(pipe)));
1968 if (pch_iir & SDE_ERROR_CPT)
1969 cpt_serr_int_handler(dev);
1972 static void spt_irq_handler(struct drm_device *dev, u32 pch_iir)
1974 struct drm_i915_private *dev_priv = dev->dev_private;
1975 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_SPT &
1976 ~SDE_PORTE_HOTPLUG_SPT;
1977 u32 hotplug2_trigger = pch_iir & SDE_PORTE_HOTPLUG_SPT;
1978 u32 pin_mask = 0, long_mask = 0;
1980 if (hotplug_trigger) {
1981 u32 dig_hotplug_reg;
1983 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
1984 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
1986 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
1987 dig_hotplug_reg, hpd_spt,
1988 spt_port_hotplug_long_detect);
1991 if (hotplug2_trigger) {
1992 u32 dig_hotplug_reg;
1994 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG2);
1995 I915_WRITE(PCH_PORT_HOTPLUG2, dig_hotplug_reg);
1997 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug2_trigger,
1998 dig_hotplug_reg, hpd_spt,
1999 spt_port_hotplug2_long_detect);
2003 intel_hpd_irq_handler(dev, pin_mask, long_mask);
2005 if (pch_iir & SDE_GMBUS_CPT)
2006 gmbus_irq_handler(dev);
2009 static void ilk_hpd_irq_handler(struct drm_device *dev, u32 hotplug_trigger,
2010 const u32 hpd[HPD_NUM_PINS])
2012 struct drm_i915_private *dev_priv = to_i915(dev);
2013 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2015 dig_hotplug_reg = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
2016 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, dig_hotplug_reg);
2018 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
2019 dig_hotplug_reg, hpd,
2020 ilk_port_hotplug_long_detect);
2022 intel_hpd_irq_handler(dev, pin_mask, long_mask);
2025 static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir)
2027 struct drm_i915_private *dev_priv = dev->dev_private;
2029 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG;
2031 if (hotplug_trigger)
2032 ilk_hpd_irq_handler(dev, hotplug_trigger, hpd_ilk);
2034 if (de_iir & DE_AUX_CHANNEL_A)
2035 dp_aux_irq_handler(dev);
2037 if (de_iir & DE_GSE)
2038 intel_opregion_asle_intr(dev);
2040 if (de_iir & DE_POISON)
2041 DRM_ERROR("Poison interrupt\n");
2043 for_each_pipe(dev_priv, pipe) {
2044 if (de_iir & DE_PIPE_VBLANK(pipe) &&
2045 intel_pipe_handle_vblank(dev, pipe))
2046 intel_check_page_flip(dev, pipe);
2048 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
2049 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
2051 if (de_iir & DE_PIPE_CRC_DONE(pipe))
2052 i9xx_pipe_crc_irq_handler(dev, pipe);
2054 /* plane/pipes map 1:1 on ilk+ */
2055 if (de_iir & DE_PLANE_FLIP_DONE(pipe)) {
2056 intel_prepare_page_flip(dev, pipe);
2057 intel_finish_page_flip_plane(dev, pipe);
2061 /* check event from PCH */
2062 if (de_iir & DE_PCH_EVENT) {
2063 u32 pch_iir = I915_READ(SDEIIR);
2065 if (HAS_PCH_CPT(dev))
2066 cpt_irq_handler(dev, pch_iir);
2068 ibx_irq_handler(dev, pch_iir);
2070 /* should clear PCH hotplug event before clear CPU irq */
2071 I915_WRITE(SDEIIR, pch_iir);
2074 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
2075 ironlake_rps_change_irq_handler(dev);
2078 static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
2080 struct drm_i915_private *dev_priv = dev->dev_private;
2082 u32 hotplug_trigger = de_iir & DE_DP_A_HOTPLUG_IVB;
2084 if (hotplug_trigger)
2085 ilk_hpd_irq_handler(dev, hotplug_trigger, hpd_ivb);
2087 if (de_iir & DE_ERR_INT_IVB)
2088 ivb_err_int_handler(dev);
2090 if (de_iir & DE_AUX_CHANNEL_A_IVB)
2091 dp_aux_irq_handler(dev);
2093 if (de_iir & DE_GSE_IVB)
2094 intel_opregion_asle_intr(dev);
2096 for_each_pipe(dev_priv, pipe) {
2097 if (de_iir & (DE_PIPE_VBLANK_IVB(pipe)) &&
2098 intel_pipe_handle_vblank(dev, pipe))
2099 intel_check_page_flip(dev, pipe);
2101 /* plane/pipes map 1:1 on ilk+ */
2102 if (de_iir & DE_PLANE_FLIP_DONE_IVB(pipe)) {
2103 intel_prepare_page_flip(dev, pipe);
2104 intel_finish_page_flip_plane(dev, pipe);
2108 /* check event from PCH */
2109 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
2110 u32 pch_iir = I915_READ(SDEIIR);
2112 cpt_irq_handler(dev, pch_iir);
2114 /* clear PCH hotplug event before clear CPU irq */
2115 I915_WRITE(SDEIIR, pch_iir);
2120 * To handle irqs with the minimum potential races with fresh interrupts, we:
2121 * 1 - Disable Master Interrupt Control.
2122 * 2 - Find the source(s) of the interrupt.
2123 * 3 - Clear the Interrupt Identity bits (IIR).
2124 * 4 - Process the interrupt(s) that had bits set in the IIRs.
2125 * 5 - Re-enable Master Interrupt Control.
2127 static irqreturn_t ironlake_irq_handler(int irq, void *arg)
2129 struct drm_device *dev = arg;
2130 struct drm_i915_private *dev_priv = dev->dev_private;
2131 u32 de_iir, gt_iir, de_ier, sde_ier = 0;
2132 irqreturn_t ret = IRQ_NONE;
2134 if (!intel_irqs_enabled(dev_priv))
2137 /* We get interrupts on unclaimed registers, so check for this before we
2138 * do any I915_{READ,WRITE}. */
2139 intel_uncore_check_errors(dev);
2141 /* disable master interrupt before clearing iir */
2142 de_ier = I915_READ(DEIER);
2143 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
2144 POSTING_READ(DEIER);
2146 /* Disable south interrupts. We'll only write to SDEIIR once, so further
2147 * interrupts will will be stored on its back queue, and then we'll be
2148 * able to process them after we restore SDEIER (as soon as we restore
2149 * it, we'll get an interrupt if SDEIIR still has something to process
2150 * due to its back queue). */
2151 if (!HAS_PCH_NOP(dev)) {
2152 sde_ier = I915_READ(SDEIER);
2153 I915_WRITE(SDEIER, 0);
2154 POSTING_READ(SDEIER);
2157 /* Find, clear, then process each source of interrupt */
2159 gt_iir = I915_READ(GTIIR);
2161 I915_WRITE(GTIIR, gt_iir);
2163 if (INTEL_INFO(dev)->gen >= 6)
2164 snb_gt_irq_handler(dev, dev_priv, gt_iir);
2166 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
2169 de_iir = I915_READ(DEIIR);
2171 I915_WRITE(DEIIR, de_iir);
2173 if (INTEL_INFO(dev)->gen >= 7)
2174 ivb_display_irq_handler(dev, de_iir);
2176 ilk_display_irq_handler(dev, de_iir);
2179 if (INTEL_INFO(dev)->gen >= 6) {
2180 u32 pm_iir = I915_READ(GEN6_PMIIR);
2182 I915_WRITE(GEN6_PMIIR, pm_iir);
2184 gen6_rps_irq_handler(dev_priv, pm_iir);
2188 I915_WRITE(DEIER, de_ier);
2189 POSTING_READ(DEIER);
2190 if (!HAS_PCH_NOP(dev)) {
2191 I915_WRITE(SDEIER, sde_ier);
2192 POSTING_READ(SDEIER);
2198 static void bxt_hpd_irq_handler(struct drm_device *dev, u32 hotplug_trigger,
2199 const u32 hpd[HPD_NUM_PINS])
2201 struct drm_i915_private *dev_priv = to_i915(dev);
2202 u32 dig_hotplug_reg, pin_mask = 0, long_mask = 0;
2204 dig_hotplug_reg = I915_READ(PCH_PORT_HOTPLUG);
2205 I915_WRITE(PCH_PORT_HOTPLUG, dig_hotplug_reg);
2207 intel_get_hpd_pins(&pin_mask, &long_mask, hotplug_trigger,
2208 dig_hotplug_reg, hpd,
2209 bxt_port_hotplug_long_detect);
2211 intel_hpd_irq_handler(dev, pin_mask, long_mask);
2214 static irqreturn_t gen8_irq_handler(int irq, void *arg)
2216 struct drm_device *dev = arg;
2217 struct drm_i915_private *dev_priv = dev->dev_private;
2219 irqreturn_t ret = IRQ_NONE;
2222 u32 aux_mask = GEN8_AUX_CHANNEL_A;
2224 if (!intel_irqs_enabled(dev_priv))
2227 if (INTEL_INFO(dev_priv)->gen >= 9)
2228 aux_mask |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
2231 master_ctl = I915_READ_FW(GEN8_MASTER_IRQ);
2232 master_ctl &= ~GEN8_MASTER_IRQ_CONTROL;
2236 I915_WRITE_FW(GEN8_MASTER_IRQ, 0);
2238 /* Find, clear, then process each source of interrupt */
2240 ret = gen8_gt_irq_handler(dev_priv, master_ctl);
2242 if (master_ctl & GEN8_DE_MISC_IRQ) {
2243 tmp = I915_READ(GEN8_DE_MISC_IIR);
2245 I915_WRITE(GEN8_DE_MISC_IIR, tmp);
2247 if (tmp & GEN8_DE_MISC_GSE)
2248 intel_opregion_asle_intr(dev);
2250 DRM_ERROR("Unexpected DE Misc interrupt\n");
2253 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
2256 if (master_ctl & GEN8_DE_PORT_IRQ) {
2257 tmp = I915_READ(GEN8_DE_PORT_IIR);
2260 u32 hotplug_trigger = 0;
2262 if (IS_BROXTON(dev_priv))
2263 hotplug_trigger = tmp & BXT_DE_PORT_HOTPLUG_MASK;
2264 else if (IS_BROADWELL(dev_priv))
2265 hotplug_trigger = tmp & GEN8_PORT_DP_A_HOTPLUG;
2267 I915_WRITE(GEN8_DE_PORT_IIR, tmp);
2270 if (tmp & aux_mask) {
2271 dp_aux_irq_handler(dev);
2275 if (hotplug_trigger) {
2276 if (IS_BROXTON(dev))
2277 bxt_hpd_irq_handler(dev, hotplug_trigger, hpd_bxt);
2279 ilk_hpd_irq_handler(dev, hotplug_trigger, hpd_bdw);
2283 if (IS_BROXTON(dev) && (tmp & BXT_DE_PORT_GMBUS)) {
2284 gmbus_irq_handler(dev);
2289 DRM_ERROR("Unexpected DE Port interrupt\n");
2292 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
2295 for_each_pipe(dev_priv, pipe) {
2296 uint32_t pipe_iir, flip_done = 0, fault_errors = 0;
2298 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
2301 pipe_iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
2304 I915_WRITE(GEN8_DE_PIPE_IIR(pipe), pipe_iir);
2306 if (pipe_iir & GEN8_PIPE_VBLANK &&
2307 intel_pipe_handle_vblank(dev, pipe))
2308 intel_check_page_flip(dev, pipe);
2310 if (INTEL_INFO(dev_priv)->gen >= 9)
2311 flip_done = pipe_iir & GEN9_PIPE_PLANE1_FLIP_DONE;
2313 flip_done = pipe_iir & GEN8_PIPE_PRIMARY_FLIP_DONE;
2316 intel_prepare_page_flip(dev, pipe);
2317 intel_finish_page_flip_plane(dev, pipe);
2320 if (pipe_iir & GEN8_PIPE_CDCLK_CRC_DONE)
2321 hsw_pipe_crc_irq_handler(dev, pipe);
2323 if (pipe_iir & GEN8_PIPE_FIFO_UNDERRUN)
2324 intel_cpu_fifo_underrun_irq_handler(dev_priv,
2328 if (INTEL_INFO(dev_priv)->gen >= 9)
2329 fault_errors = pipe_iir & GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
2331 fault_errors = pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
2334 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
2336 pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS);
2338 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
2341 if (HAS_PCH_SPLIT(dev) && !HAS_PCH_NOP(dev) &&
2342 master_ctl & GEN8_DE_PCH_IRQ) {
2344 * FIXME(BDW): Assume for now that the new interrupt handling
2345 * scheme also closed the SDE interrupt handling race we've seen
2346 * on older pch-split platforms. But this needs testing.
2348 u32 pch_iir = I915_READ(SDEIIR);
2350 I915_WRITE(SDEIIR, pch_iir);
2353 if (HAS_PCH_SPT(dev_priv))
2354 spt_irq_handler(dev, pch_iir);
2356 cpt_irq_handler(dev, pch_iir);
2359 * Like on previous PCH there seems to be something
2360 * fishy going on with forwarding PCH interrupts.
2362 DRM_DEBUG_DRIVER("The master control interrupt lied (SDE)!\n");
2366 I915_WRITE_FW(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
2367 POSTING_READ_FW(GEN8_MASTER_IRQ);
2372 static void i915_error_wake_up(struct drm_i915_private *dev_priv,
2373 bool reset_completed)
2375 struct intel_engine_cs *ring;
2379 * Notify all waiters for GPU completion events that reset state has
2380 * been changed, and that they need to restart their wait after
2381 * checking for potential errors (and bail out to drop locks if there is
2382 * a gpu reset pending so that i915_error_work_func can acquire them).
2385 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
2386 for_each_ring(ring, dev_priv, i)
2387 wake_up_all(&ring->irq_queue);
2389 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
2390 wake_up_all(&dev_priv->pending_flip_queue);
2393 * Signal tasks blocked in i915_gem_wait_for_error that the pending
2394 * reset state is cleared.
2396 if (reset_completed)
2397 wake_up_all(&dev_priv->gpu_error.reset_queue);
2401 * i915_reset_and_wakeup - do process context error handling work
2404 * Fire an error uevent so userspace can see that a hang or error
2407 static void i915_reset_and_wakeup(struct drm_device *dev)
2409 struct drm_i915_private *dev_priv = to_i915(dev);
2410 struct i915_gpu_error *error = &dev_priv->gpu_error;
2411 char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
2412 char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
2413 char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
2416 kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, error_event);
2419 * Note that there's only one work item which does gpu resets, so we
2420 * need not worry about concurrent gpu resets potentially incrementing
2421 * error->reset_counter twice. We only need to take care of another
2422 * racing irq/hangcheck declaring the gpu dead for a second time. A
2423 * quick check for that is good enough: schedule_work ensures the
2424 * correct ordering between hang detection and this work item, and since
2425 * the reset in-progress bit is only ever set by code outside of this
2426 * work we don't need to worry about any other races.
2428 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
2429 DRM_DEBUG_DRIVER("resetting chip\n");
2430 kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE,
2434 * In most cases it's guaranteed that we get here with an RPM
2435 * reference held, for example because there is a pending GPU
2436 * request that won't finish until the reset is done. This
2437 * isn't the case at least when we get here by doing a
2438 * simulated reset via debugs, so get an RPM reference.
2440 intel_runtime_pm_get(dev_priv);
2442 intel_prepare_reset(dev);
2445 * All state reset _must_ be completed before we update the
2446 * reset counter, for otherwise waiters might miss the reset
2447 * pending state and not properly drop locks, resulting in
2448 * deadlocks with the reset work.
2450 ret = i915_reset(dev);
2452 intel_finish_reset(dev);
2454 intel_runtime_pm_put(dev_priv);
2458 * After all the gem state is reset, increment the reset
2459 * counter and wake up everyone waiting for the reset to
2462 * Since unlock operations are a one-sided barrier only,
2463 * we need to insert a barrier here to order any seqno
2465 * the counter increment.
2467 smp_mb__before_atomic();
2468 atomic_inc(&dev_priv->gpu_error.reset_counter);
2470 kobject_uevent_env(&dev->primary->kdev->kobj,
2471 KOBJ_CHANGE, reset_done_event);
2473 atomic_or(I915_WEDGED, &error->reset_counter);
2477 * Note: The wake_up also serves as a memory barrier so that
2478 * waiters see the update value of the reset counter atomic_t.
2480 i915_error_wake_up(dev_priv, true);
2484 static void i915_report_and_clear_eir(struct drm_device *dev)
2486 struct drm_i915_private *dev_priv = dev->dev_private;
2487 uint32_t instdone[I915_NUM_INSTDONE_REG];
2488 u32 eir = I915_READ(EIR);
2494 pr_err("render error detected, EIR: 0x%08x\n", eir);
2496 i915_get_extra_instdone(dev, instdone);
2499 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
2500 u32 ipeir = I915_READ(IPEIR_I965);
2502 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2503 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2504 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2505 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2506 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2507 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2508 I915_WRITE(IPEIR_I965, ipeir);
2509 POSTING_READ(IPEIR_I965);
2511 if (eir & GM45_ERROR_PAGE_TABLE) {
2512 u32 pgtbl_err = I915_READ(PGTBL_ER);
2513 pr_err("page table error\n");
2514 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2515 I915_WRITE(PGTBL_ER, pgtbl_err);
2516 POSTING_READ(PGTBL_ER);
2520 if (!IS_GEN2(dev)) {
2521 if (eir & I915_ERROR_PAGE_TABLE) {
2522 u32 pgtbl_err = I915_READ(PGTBL_ER);
2523 pr_err("page table error\n");
2524 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2525 I915_WRITE(PGTBL_ER, pgtbl_err);
2526 POSTING_READ(PGTBL_ER);
2530 if (eir & I915_ERROR_MEMORY_REFRESH) {
2531 pr_err("memory refresh error:\n");
2532 for_each_pipe(dev_priv, pipe)
2533 pr_err("pipe %c stat: 0x%08x\n",
2534 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2535 /* pipestat has already been acked */
2537 if (eir & I915_ERROR_INSTRUCTION) {
2538 pr_err("instruction error\n");
2539 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2540 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2541 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2542 if (INTEL_INFO(dev)->gen < 4) {
2543 u32 ipeir = I915_READ(IPEIR);
2545 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2546 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2547 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2548 I915_WRITE(IPEIR, ipeir);
2549 POSTING_READ(IPEIR);
2551 u32 ipeir = I915_READ(IPEIR_I965);
2553 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2554 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2555 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2556 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2557 I915_WRITE(IPEIR_I965, ipeir);
2558 POSTING_READ(IPEIR_I965);
2562 I915_WRITE(EIR, eir);
2564 eir = I915_READ(EIR);
2567 * some errors might have become stuck,
2570 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2571 I915_WRITE(EMR, I915_READ(EMR) | eir);
2572 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2577 * i915_handle_error - handle a gpu error
2580 * Do some basic checking of register state at error time and
2581 * dump it to the syslog. Also call i915_capture_error_state() to make
2582 * sure we get a record and make it available in debugfs. Fire a uevent
2583 * so userspace knows something bad happened (should trigger collection
2584 * of a ring dump etc.).
2586 void i915_handle_error(struct drm_device *dev, bool wedged,
2587 const char *fmt, ...)
2589 struct drm_i915_private *dev_priv = dev->dev_private;
2593 va_start(args, fmt);
2594 vscnprintf(error_msg, sizeof(error_msg), fmt, args);
2597 i915_capture_error_state(dev, wedged, error_msg);
2598 i915_report_and_clear_eir(dev);
2601 atomic_or(I915_RESET_IN_PROGRESS_FLAG,
2602 &dev_priv->gpu_error.reset_counter);
2605 * Wakeup waiting processes so that the reset function
2606 * i915_reset_and_wakeup doesn't deadlock trying to grab
2607 * various locks. By bumping the reset counter first, the woken
2608 * processes will see a reset in progress and back off,
2609 * releasing their locks and then wait for the reset completion.
2610 * We must do this for _all_ gpu waiters that might hold locks
2611 * that the reset work needs to acquire.
2613 * Note: The wake_up serves as the required memory barrier to
2614 * ensure that the waiters see the updated value of the reset
2617 i915_error_wake_up(dev_priv, false);
2620 i915_reset_and_wakeup(dev);
2623 /* Called from drm generic code, passed 'crtc' which
2624 * we use as a pipe index
2626 static int i915_enable_vblank(struct drm_device *dev, unsigned int pipe)
2628 struct drm_i915_private *dev_priv = dev->dev_private;
2629 unsigned long irqflags;
2631 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2632 if (INTEL_INFO(dev)->gen >= 4)
2633 i915_enable_pipestat(dev_priv, pipe,
2634 PIPE_START_VBLANK_INTERRUPT_STATUS);
2636 i915_enable_pipestat(dev_priv, pipe,
2637 PIPE_VBLANK_INTERRUPT_STATUS);
2638 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2643 static int ironlake_enable_vblank(struct drm_device *dev, unsigned int pipe)
2645 struct drm_i915_private *dev_priv = dev->dev_private;
2646 unsigned long irqflags;
2647 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2648 DE_PIPE_VBLANK(pipe);
2650 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2651 ironlake_enable_display_irq(dev_priv, bit);
2652 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2657 static int valleyview_enable_vblank(struct drm_device *dev, unsigned int pipe)
2659 struct drm_i915_private *dev_priv = dev->dev_private;
2660 unsigned long irqflags;
2662 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2663 i915_enable_pipestat(dev_priv, pipe,
2664 PIPE_START_VBLANK_INTERRUPT_STATUS);
2665 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2670 static int gen8_enable_vblank(struct drm_device *dev, unsigned int pipe)
2672 struct drm_i915_private *dev_priv = dev->dev_private;
2673 unsigned long irqflags;
2675 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2676 dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_VBLANK;
2677 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2678 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2679 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2683 /* Called from drm generic code, passed 'crtc' which
2684 * we use as a pipe index
2686 static void i915_disable_vblank(struct drm_device *dev, unsigned int pipe)
2688 struct drm_i915_private *dev_priv = dev->dev_private;
2689 unsigned long irqflags;
2691 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2692 i915_disable_pipestat(dev_priv, pipe,
2693 PIPE_VBLANK_INTERRUPT_STATUS |
2694 PIPE_START_VBLANK_INTERRUPT_STATUS);
2695 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2698 static void ironlake_disable_vblank(struct drm_device *dev, unsigned int pipe)
2700 struct drm_i915_private *dev_priv = dev->dev_private;
2701 unsigned long irqflags;
2702 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2703 DE_PIPE_VBLANK(pipe);
2705 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2706 ironlake_disable_display_irq(dev_priv, bit);
2707 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2710 static void valleyview_disable_vblank(struct drm_device *dev, unsigned int pipe)
2712 struct drm_i915_private *dev_priv = dev->dev_private;
2713 unsigned long irqflags;
2715 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2716 i915_disable_pipestat(dev_priv, pipe,
2717 PIPE_START_VBLANK_INTERRUPT_STATUS);
2718 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2721 static void gen8_disable_vblank(struct drm_device *dev, unsigned int pipe)
2723 struct drm_i915_private *dev_priv = dev->dev_private;
2724 unsigned long irqflags;
2726 spin_lock_irqsave(&dev_priv->irq_lock, irqflags);
2727 dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_VBLANK;
2728 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2729 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2730 spin_unlock_irqrestore(&dev_priv->irq_lock, irqflags);
2734 ring_idle(struct intel_engine_cs *ring, u32 seqno)
2736 return (list_empty(&ring->request_list) ||
2737 i915_seqno_passed(seqno, ring->last_submitted_seqno));
2741 ipehr_is_semaphore_wait(struct drm_device *dev, u32 ipehr)
2743 if (INTEL_INFO(dev)->gen >= 8) {
2744 return (ipehr >> 23) == 0x1c;
2746 ipehr &= ~MI_SEMAPHORE_SYNC_MASK;
2747 return ipehr == (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE |
2748 MI_SEMAPHORE_REGISTER);
2752 static struct intel_engine_cs *
2753 semaphore_wait_to_signaller_ring(struct intel_engine_cs *ring, u32 ipehr, u64 offset)
2755 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2756 struct intel_engine_cs *signaller;
2759 if (INTEL_INFO(dev_priv->dev)->gen >= 8) {
2760 for_each_ring(signaller, dev_priv, i) {
2761 if (ring == signaller)
2764 if (offset == signaller->semaphore.signal_ggtt[ring->id])
2768 u32 sync_bits = ipehr & MI_SEMAPHORE_SYNC_MASK;
2770 for_each_ring(signaller, dev_priv, i) {
2771 if(ring == signaller)
2774 if (sync_bits == signaller->semaphore.mbox.wait[ring->id])
2779 DRM_ERROR("No signaller ring found for ring %i, ipehr 0x%08x, offset 0x%016llx\n",
2780 ring->id, ipehr, offset);
2785 static struct intel_engine_cs *
2786 semaphore_waits_for(struct intel_engine_cs *ring, u32 *seqno)
2788 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2789 u32 cmd, ipehr, head;
2794 * This function does not support execlist mode - any attempt to
2795 * proceed further into this function will result in a kernel panic
2796 * when dereferencing ring->buffer, which is not set up in execlist
2799 * The correct way of doing it would be to derive the currently
2800 * executing ring buffer from the current context, which is derived
2801 * from the currently running request. Unfortunately, to get the
2802 * current request we would have to grab the struct_mutex before doing
2803 * anything else, which would be ill-advised since some other thread
2804 * might have grabbed it already and managed to hang itself, causing
2805 * the hang checker to deadlock.
2807 * Therefore, this function does not support execlist mode in its
2808 * current form. Just return NULL and move on.
2810 if (ring->buffer == NULL)
2813 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
2814 if (!ipehr_is_semaphore_wait(ring->dev, ipehr))
2818 * HEAD is likely pointing to the dword after the actual command,
2819 * so scan backwards until we find the MBOX. But limit it to just 3
2820 * or 4 dwords depending on the semaphore wait command size.
2821 * Note that we don't care about ACTHD here since that might
2822 * point at at batch, and semaphores are always emitted into the
2823 * ringbuffer itself.
2825 head = I915_READ_HEAD(ring) & HEAD_ADDR;
2826 backwards = (INTEL_INFO(ring->dev)->gen >= 8) ? 5 : 4;
2828 for (i = backwards; i; --i) {
2830 * Be paranoid and presume the hw has gone off into the wild -
2831 * our ring is smaller than what the hardware (and hence
2832 * HEAD_ADDR) allows. Also handles wrap-around.
2834 head &= ring->buffer->size - 1;
2836 /* This here seems to blow up */
2837 cmd = ioread32(ring->buffer->virtual_start + head);
2847 *seqno = ioread32(ring->buffer->virtual_start + head + 4) + 1;
2848 if (INTEL_INFO(ring->dev)->gen >= 8) {
2849 offset = ioread32(ring->buffer->virtual_start + head + 12);
2851 offset = ioread32(ring->buffer->virtual_start + head + 8);
2853 return semaphore_wait_to_signaller_ring(ring, ipehr, offset);
2856 static int semaphore_passed(struct intel_engine_cs *ring)
2858 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2859 struct intel_engine_cs *signaller;
2862 ring->hangcheck.deadlock++;
2864 signaller = semaphore_waits_for(ring, &seqno);
2865 if (signaller == NULL)
2868 /* Prevent pathological recursion due to driver bugs */
2869 if (signaller->hangcheck.deadlock >= I915_NUM_RINGS)
2872 if (i915_seqno_passed(signaller->get_seqno(signaller, false), seqno))
2875 /* cursory check for an unkickable deadlock */
2876 if (I915_READ_CTL(signaller) & RING_WAIT_SEMAPHORE &&
2877 semaphore_passed(signaller) < 0)
2883 static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
2885 struct intel_engine_cs *ring;
2888 for_each_ring(ring, dev_priv, i)
2889 ring->hangcheck.deadlock = 0;
2892 static enum intel_ring_hangcheck_action
2893 ring_stuck(struct intel_engine_cs *ring, u64 acthd)
2895 struct drm_device *dev = ring->dev;
2896 struct drm_i915_private *dev_priv = dev->dev_private;
2899 if (acthd != ring->hangcheck.acthd) {
2900 if (acthd > ring->hangcheck.max_acthd) {
2901 ring->hangcheck.max_acthd = acthd;
2902 return HANGCHECK_ACTIVE;
2905 return HANGCHECK_ACTIVE_LOOP;
2909 return HANGCHECK_HUNG;
2911 /* Is the chip hanging on a WAIT_FOR_EVENT?
2912 * If so we can simply poke the RB_WAIT bit
2913 * and break the hang. This should work on
2914 * all but the second generation chipsets.
2916 tmp = I915_READ_CTL(ring);
2917 if (tmp & RING_WAIT) {
2918 i915_handle_error(dev, false,
2919 "Kicking stuck wait on %s",
2921 I915_WRITE_CTL(ring, tmp);
2922 return HANGCHECK_KICK;
2925 if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
2926 switch (semaphore_passed(ring)) {
2928 return HANGCHECK_HUNG;
2930 i915_handle_error(dev, false,
2931 "Kicking stuck semaphore on %s",
2933 I915_WRITE_CTL(ring, tmp);
2934 return HANGCHECK_KICK;
2936 return HANGCHECK_WAIT;
2940 return HANGCHECK_HUNG;
2944 * This is called when the chip hasn't reported back with completed
2945 * batchbuffers in a long time. We keep track per ring seqno progress and
2946 * if there are no progress, hangcheck score for that ring is increased.
2947 * Further, acthd is inspected to see if the ring is stuck. On stuck case
2948 * we kick the ring. If we see no progress on three subsequent calls
2949 * we assume chip is wedged and try to fix it by resetting the chip.
2951 static void i915_hangcheck_elapsed(struct work_struct *work)
2953 struct drm_i915_private *dev_priv =
2954 container_of(work, typeof(*dev_priv),
2955 gpu_error.hangcheck_work.work);
2956 struct drm_device *dev = dev_priv->dev;
2957 struct intel_engine_cs *ring;
2959 int busy_count = 0, rings_hung = 0;
2960 bool stuck[I915_NUM_RINGS] = { 0 };
2965 if (!i915.enable_hangcheck)
2968 for_each_ring(ring, dev_priv, i) {
2973 semaphore_clear_deadlocks(dev_priv);
2975 seqno = ring->get_seqno(ring, false);
2976 acthd = intel_ring_get_active_head(ring);
2978 if (ring->hangcheck.seqno == seqno) {
2979 if (ring_idle(ring, seqno)) {
2980 ring->hangcheck.action = HANGCHECK_IDLE;
2982 if (waitqueue_active(&ring->irq_queue)) {
2983 /* Issue a wake-up to catch stuck h/w. */
2984 if (!test_and_set_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings)) {
2985 if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring)))
2986 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2989 DRM_INFO("Fake missed irq on %s\n",
2991 wake_up_all(&ring->irq_queue);
2993 /* Safeguard against driver failure */
2994 ring->hangcheck.score += BUSY;
2998 /* We always increment the hangcheck score
2999 * if the ring is busy and still processing
3000 * the same request, so that no single request
3001 * can run indefinitely (such as a chain of
3002 * batches). The only time we do not increment
3003 * the hangcheck score on this ring, if this
3004 * ring is in a legitimate wait for another
3005 * ring. In that case the waiting ring is a
3006 * victim and we want to be sure we catch the
3007 * right culprit. Then every time we do kick
3008 * the ring, add a small increment to the
3009 * score so that we can catch a batch that is
3010 * being repeatedly kicked and so responsible
3011 * for stalling the machine.
3013 ring->hangcheck.action = ring_stuck(ring,
3016 switch (ring->hangcheck.action) {
3017 case HANGCHECK_IDLE:
3018 case HANGCHECK_WAIT:
3019 case HANGCHECK_ACTIVE:
3021 case HANGCHECK_ACTIVE_LOOP:
3022 ring->hangcheck.score += BUSY;
3024 case HANGCHECK_KICK:
3025 ring->hangcheck.score += KICK;
3027 case HANGCHECK_HUNG:
3028 ring->hangcheck.score += HUNG;
3034 ring->hangcheck.action = HANGCHECK_ACTIVE;
3036 /* Gradually reduce the count so that we catch DoS
3037 * attempts across multiple batches.
3039 if (ring->hangcheck.score > 0)
3040 ring->hangcheck.score--;
3042 ring->hangcheck.acthd = ring->hangcheck.max_acthd = 0;
3045 ring->hangcheck.seqno = seqno;
3046 ring->hangcheck.acthd = acthd;
3050 for_each_ring(ring, dev_priv, i) {
3051 if (ring->hangcheck.score >= HANGCHECK_SCORE_RING_HUNG) {
3052 DRM_INFO("%s on %s\n",
3053 stuck[i] ? "stuck" : "no progress",
3060 return i915_handle_error(dev, true, "Ring hung");
3063 /* Reset timer case chip hangs without another request
3065 i915_queue_hangcheck(dev);
3068 void i915_queue_hangcheck(struct drm_device *dev)
3070 struct i915_gpu_error *e = &to_i915(dev)->gpu_error;
3072 if (!i915.enable_hangcheck)
3075 /* Don't continually defer the hangcheck so that it is always run at
3076 * least once after work has been scheduled on any ring. Otherwise,
3077 * we will ignore a hung ring if a second ring is kept busy.
3080 queue_delayed_work(e->hangcheck_wq, &e->hangcheck_work,
3081 round_jiffies_up_relative(DRM_I915_HANGCHECK_JIFFIES));
3084 static void ibx_irq_reset(struct drm_device *dev)
3086 struct drm_i915_private *dev_priv = dev->dev_private;
3088 if (HAS_PCH_NOP(dev))
3091 GEN5_IRQ_RESET(SDE);
3093 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
3094 I915_WRITE(SERR_INT, 0xffffffff);
3098 * SDEIER is also touched by the interrupt handler to work around missed PCH
3099 * interrupts. Hence we can't update it after the interrupt handler is enabled -
3100 * instead we unconditionally enable all PCH interrupt sources here, but then
3101 * only unmask them as needed with SDEIMR.
3103 * This function needs to be called before interrupts are enabled.
3105 static void ibx_irq_pre_postinstall(struct drm_device *dev)
3107 struct drm_i915_private *dev_priv = dev->dev_private;
3109 if (HAS_PCH_NOP(dev))
3112 WARN_ON(I915_READ(SDEIER) != 0);
3113 I915_WRITE(SDEIER, 0xffffffff);
3114 POSTING_READ(SDEIER);
3117 static void gen5_gt_irq_reset(struct drm_device *dev)
3119 struct drm_i915_private *dev_priv = dev->dev_private;
3122 if (INTEL_INFO(dev)->gen >= 6)
3123 GEN5_IRQ_RESET(GEN6_PM);
3128 static void ironlake_irq_reset(struct drm_device *dev)
3130 struct drm_i915_private *dev_priv = dev->dev_private;
3132 I915_WRITE(HWSTAM, 0xffffffff);
3136 I915_WRITE(GEN7_ERR_INT, 0xffffffff);
3138 gen5_gt_irq_reset(dev);
3143 static void vlv_display_irq_reset(struct drm_i915_private *dev_priv)
3147 i915_hotplug_interrupt_update(dev_priv, 0xFFFFFFFF, 0);
3148 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3150 for_each_pipe(dev_priv, pipe)
3151 I915_WRITE(PIPESTAT(pipe), 0xffff);
3153 GEN5_IRQ_RESET(VLV_);
3156 static void valleyview_irq_preinstall(struct drm_device *dev)
3158 struct drm_i915_private *dev_priv = dev->dev_private;
3161 I915_WRITE(VLV_IMR, 0);
3162 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
3163 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
3164 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
3166 gen5_gt_irq_reset(dev);
3168 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
3170 vlv_display_irq_reset(dev_priv);
3173 static void gen8_gt_irq_reset(struct drm_i915_private *dev_priv)
3175 GEN8_IRQ_RESET_NDX(GT, 0);
3176 GEN8_IRQ_RESET_NDX(GT, 1);
3177 GEN8_IRQ_RESET_NDX(GT, 2);
3178 GEN8_IRQ_RESET_NDX(GT, 3);
3181 static void gen8_irq_reset(struct drm_device *dev)
3183 struct drm_i915_private *dev_priv = dev->dev_private;
3186 I915_WRITE(GEN8_MASTER_IRQ, 0);
3187 POSTING_READ(GEN8_MASTER_IRQ);
3189 gen8_gt_irq_reset(dev_priv);
3191 for_each_pipe(dev_priv, pipe)
3192 if (intel_display_power_is_enabled(dev_priv,
3193 POWER_DOMAIN_PIPE(pipe)))
3194 GEN8_IRQ_RESET_NDX(DE_PIPE, pipe);
3196 GEN5_IRQ_RESET(GEN8_DE_PORT_);
3197 GEN5_IRQ_RESET(GEN8_DE_MISC_);
3198 GEN5_IRQ_RESET(GEN8_PCU_);
3200 if (HAS_PCH_SPLIT(dev))
3204 void gen8_irq_power_well_post_enable(struct drm_i915_private *dev_priv,
3205 unsigned int pipe_mask)
3207 uint32_t extra_ier = GEN8_PIPE_VBLANK | GEN8_PIPE_FIFO_UNDERRUN;
3209 spin_lock_irq(&dev_priv->irq_lock);
3210 if (pipe_mask & 1 << PIPE_A)
3211 GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_A,
3212 dev_priv->de_irq_mask[PIPE_A],
3213 ~dev_priv->de_irq_mask[PIPE_A] | extra_ier);
3214 if (pipe_mask & 1 << PIPE_B)
3215 GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_B,
3216 dev_priv->de_irq_mask[PIPE_B],
3217 ~dev_priv->de_irq_mask[PIPE_B] | extra_ier);
3218 if (pipe_mask & 1 << PIPE_C)
3219 GEN8_IRQ_INIT_NDX(DE_PIPE, PIPE_C,
3220 dev_priv->de_irq_mask[PIPE_C],
3221 ~dev_priv->de_irq_mask[PIPE_C] | extra_ier);
3222 spin_unlock_irq(&dev_priv->irq_lock);
3225 static void cherryview_irq_preinstall(struct drm_device *dev)
3227 struct drm_i915_private *dev_priv = dev->dev_private;
3229 I915_WRITE(GEN8_MASTER_IRQ, 0);
3230 POSTING_READ(GEN8_MASTER_IRQ);
3232 gen8_gt_irq_reset(dev_priv);
3234 GEN5_IRQ_RESET(GEN8_PCU_);
3236 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
3238 vlv_display_irq_reset(dev_priv);
3241 static u32 intel_hpd_enabled_irqs(struct drm_device *dev,
3242 const u32 hpd[HPD_NUM_PINS])
3244 struct drm_i915_private *dev_priv = to_i915(dev);
3245 struct intel_encoder *encoder;
3246 u32 enabled_irqs = 0;
3248 for_each_intel_encoder(dev, encoder)
3249 if (dev_priv->hotplug.stats[encoder->hpd_pin].state == HPD_ENABLED)
3250 enabled_irqs |= hpd[encoder->hpd_pin];
3252 return enabled_irqs;
3255 static void ibx_hpd_irq_setup(struct drm_device *dev)
3257 struct drm_i915_private *dev_priv = dev->dev_private;
3258 u32 hotplug_irqs, hotplug, enabled_irqs;
3260 if (HAS_PCH_IBX(dev)) {
3261 hotplug_irqs = SDE_HOTPLUG_MASK;
3262 enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ibx);
3264 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
3265 enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_cpt);
3268 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3271 * Enable digital hotplug on the PCH, and configure the DP short pulse
3272 * duration to 2ms (which is the minimum in the Display Port spec).
3273 * The pulse duration bits are reserved on LPT+.
3275 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3276 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
3277 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
3278 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
3279 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
3281 * When CPU and PCH are on the same package, port A
3282 * HPD must be enabled in both north and south.
3284 if (HAS_PCH_LPT_LP(dev))
3285 hotplug |= PORTA_HOTPLUG_ENABLE;
3286 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3289 static void spt_hpd_irq_setup(struct drm_device *dev)
3291 struct drm_i915_private *dev_priv = dev->dev_private;
3292 u32 hotplug_irqs, hotplug, enabled_irqs;
3294 hotplug_irqs = SDE_HOTPLUG_MASK_SPT;
3295 enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_spt);
3297 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
3299 /* Enable digital hotplug on the PCH */
3300 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3301 hotplug |= PORTD_HOTPLUG_ENABLE | PORTC_HOTPLUG_ENABLE |
3302 PORTB_HOTPLUG_ENABLE | PORTA_HOTPLUG_ENABLE;
3303 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3305 hotplug = I915_READ(PCH_PORT_HOTPLUG2);
3306 hotplug |= PORTE_HOTPLUG_ENABLE;
3307 I915_WRITE(PCH_PORT_HOTPLUG2, hotplug);
3310 static void ilk_hpd_irq_setup(struct drm_device *dev)
3312 struct drm_i915_private *dev_priv = dev->dev_private;
3313 u32 hotplug_irqs, hotplug, enabled_irqs;
3315 if (INTEL_INFO(dev)->gen >= 8) {
3316 hotplug_irqs = GEN8_PORT_DP_A_HOTPLUG;
3317 enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_bdw);
3319 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3320 } else if (INTEL_INFO(dev)->gen >= 7) {
3321 hotplug_irqs = DE_DP_A_HOTPLUG_IVB;
3322 enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ivb);
3324 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3326 hotplug_irqs = DE_DP_A_HOTPLUG;
3327 enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_ilk);
3329 ilk_update_display_irq(dev_priv, hotplug_irqs, enabled_irqs);
3333 * Enable digital hotplug on the CPU, and configure the DP short pulse
3334 * duration to 2ms (which is the minimum in the Display Port spec)
3335 * The pulse duration bits are reserved on HSW+.
3337 hotplug = I915_READ(DIGITAL_PORT_HOTPLUG_CNTRL);
3338 hotplug &= ~DIGITAL_PORTA_PULSE_DURATION_MASK;
3339 hotplug |= DIGITAL_PORTA_HOTPLUG_ENABLE | DIGITAL_PORTA_PULSE_DURATION_2ms;
3340 I915_WRITE(DIGITAL_PORT_HOTPLUG_CNTRL, hotplug);
3342 ibx_hpd_irq_setup(dev);
3345 static void bxt_hpd_irq_setup(struct drm_device *dev)
3347 struct drm_i915_private *dev_priv = dev->dev_private;
3348 u32 hotplug_irqs, hotplug, enabled_irqs;
3350 enabled_irqs = intel_hpd_enabled_irqs(dev, hpd_bxt);
3351 hotplug_irqs = BXT_DE_PORT_HOTPLUG_MASK;
3353 bdw_update_port_irq(dev_priv, hotplug_irqs, enabled_irqs);
3355 hotplug = I915_READ(PCH_PORT_HOTPLUG);
3356 hotplug |= PORTC_HOTPLUG_ENABLE | PORTB_HOTPLUG_ENABLE |
3357 PORTA_HOTPLUG_ENABLE;
3358 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
3361 static void ibx_irq_postinstall(struct drm_device *dev)
3363 struct drm_i915_private *dev_priv = dev->dev_private;
3366 if (HAS_PCH_NOP(dev))
3369 if (HAS_PCH_IBX(dev))
3370 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
3372 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
3374 gen5_assert_iir_is_zero(dev_priv, SDEIIR);
3375 I915_WRITE(SDEIMR, ~mask);
3378 static void gen5_gt_irq_postinstall(struct drm_device *dev)
3380 struct drm_i915_private *dev_priv = dev->dev_private;
3381 u32 pm_irqs, gt_irqs;
3383 pm_irqs = gt_irqs = 0;
3385 dev_priv->gt_irq_mask = ~0;
3386 if (HAS_L3_DPF(dev)) {
3387 /* L3 parity interrupt is always unmasked. */
3388 dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev);
3389 gt_irqs |= GT_PARITY_ERROR(dev);
3392 gt_irqs |= GT_RENDER_USER_INTERRUPT;
3394 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
3395 ILK_BSD_USER_INTERRUPT;
3397 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
3400 GEN5_IRQ_INIT(GT, dev_priv->gt_irq_mask, gt_irqs);
3402 if (INTEL_INFO(dev)->gen >= 6) {
3404 * RPS interrupts will get enabled/disabled on demand when RPS
3405 * itself is enabled/disabled.
3408 pm_irqs |= PM_VEBOX_USER_INTERRUPT;
3410 dev_priv->pm_irq_mask = 0xffffffff;
3411 GEN5_IRQ_INIT(GEN6_PM, dev_priv->pm_irq_mask, pm_irqs);
3415 static int ironlake_irq_postinstall(struct drm_device *dev)
3417 struct drm_i915_private *dev_priv = dev->dev_private;
3418 u32 display_mask, extra_mask;
3420 if (INTEL_INFO(dev)->gen >= 7) {
3421 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
3422 DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB |
3423 DE_PLANEB_FLIP_DONE_IVB |
3424 DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB);
3425 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
3426 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB |
3427 DE_DP_A_HOTPLUG_IVB);
3429 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
3430 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
3432 DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE |
3434 extra_mask = (DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
3435 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN |
3439 dev_priv->irq_mask = ~display_mask;
3441 I915_WRITE(HWSTAM, 0xeffe);
3443 ibx_irq_pre_postinstall(dev);
3445 GEN5_IRQ_INIT(DE, dev_priv->irq_mask, display_mask | extra_mask);
3447 gen5_gt_irq_postinstall(dev);
3449 ibx_irq_postinstall(dev);
3451 if (IS_IRONLAKE_M(dev)) {
3452 /* Enable PCU event interrupts
3454 * spinlocking not required here for correctness since interrupt
3455 * setup is guaranteed to run in single-threaded context. But we
3456 * need it to make the assert_spin_locked happy. */
3457 spin_lock_irq(&dev_priv->irq_lock);
3458 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
3459 spin_unlock_irq(&dev_priv->irq_lock);
3465 static void valleyview_display_irqs_install(struct drm_i915_private *dev_priv)
3471 pipestat_mask = PIPESTAT_INT_STATUS_MASK |
3472 PIPE_FIFO_UNDERRUN_STATUS;
3474 for_each_pipe(dev_priv, pipe)
3475 I915_WRITE(PIPESTAT(pipe), pipestat_mask);
3476 POSTING_READ(PIPESTAT(PIPE_A));
3478 pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
3479 PIPE_CRC_DONE_INTERRUPT_STATUS;
3481 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3482 for_each_pipe(dev_priv, pipe)
3483 i915_enable_pipestat(dev_priv, pipe, pipestat_mask);
3485 iir_mask = I915_DISPLAY_PORT_INTERRUPT |
3486 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3487 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
3488 if (IS_CHERRYVIEW(dev_priv))
3489 iir_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
3490 dev_priv->irq_mask &= ~iir_mask;
3492 I915_WRITE(VLV_IIR, iir_mask);
3493 I915_WRITE(VLV_IIR, iir_mask);
3494 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3495 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3496 POSTING_READ(VLV_IMR);
3499 static void valleyview_display_irqs_uninstall(struct drm_i915_private *dev_priv)
3505 iir_mask = I915_DISPLAY_PORT_INTERRUPT |
3506 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3507 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT;
3508 if (IS_CHERRYVIEW(dev_priv))
3509 iir_mask |= I915_DISPLAY_PIPE_C_EVENT_INTERRUPT;
3511 dev_priv->irq_mask |= iir_mask;
3512 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3513 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3514 I915_WRITE(VLV_IIR, iir_mask);
3515 I915_WRITE(VLV_IIR, iir_mask);
3516 POSTING_READ(VLV_IIR);
3518 pipestat_mask = PLANE_FLIP_DONE_INT_STATUS_VLV |
3519 PIPE_CRC_DONE_INTERRUPT_STATUS;
3521 i915_disable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
3522 for_each_pipe(dev_priv, pipe)
3523 i915_disable_pipestat(dev_priv, pipe, pipestat_mask);
3525 pipestat_mask = PIPESTAT_INT_STATUS_MASK |
3526 PIPE_FIFO_UNDERRUN_STATUS;
3528 for_each_pipe(dev_priv, pipe)
3529 I915_WRITE(PIPESTAT(pipe), pipestat_mask);
3530 POSTING_READ(PIPESTAT(PIPE_A));
3533 void valleyview_enable_display_irqs(struct drm_i915_private *dev_priv)
3535 assert_spin_locked(&dev_priv->irq_lock);
3537 if (dev_priv->display_irqs_enabled)
3540 dev_priv->display_irqs_enabled = true;
3542 if (intel_irqs_enabled(dev_priv))
3543 valleyview_display_irqs_install(dev_priv);
3546 void valleyview_disable_display_irqs(struct drm_i915_private *dev_priv)
3548 assert_spin_locked(&dev_priv->irq_lock);
3550 if (!dev_priv->display_irqs_enabled)
3553 dev_priv->display_irqs_enabled = false;
3555 if (intel_irqs_enabled(dev_priv))
3556 valleyview_display_irqs_uninstall(dev_priv);
3559 static void vlv_display_irq_postinstall(struct drm_i915_private *dev_priv)
3561 dev_priv->irq_mask = ~0;
3563 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
3564 POSTING_READ(PORT_HOTPLUG_EN);
3566 I915_WRITE(VLV_IIR, 0xffffffff);
3567 I915_WRITE(VLV_IIR, 0xffffffff);
3568 I915_WRITE(VLV_IER, ~dev_priv->irq_mask);
3569 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
3570 POSTING_READ(VLV_IMR);
3572 /* Interrupt setup is already guaranteed to be single-threaded, this is
3573 * just to make the assert_spin_locked check happy. */
3574 spin_lock_irq(&dev_priv->irq_lock);
3575 if (dev_priv->display_irqs_enabled)
3576 valleyview_display_irqs_install(dev_priv);
3577 spin_unlock_irq(&dev_priv->irq_lock);
3580 static int valleyview_irq_postinstall(struct drm_device *dev)
3582 struct drm_i915_private *dev_priv = dev->dev_private;
3584 vlv_display_irq_postinstall(dev_priv);
3586 gen5_gt_irq_postinstall(dev);
3588 /* ack & enable invalid PTE error interrupts */
3589 #if 0 /* FIXME: add support to irq handler for checking these bits */
3590 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
3591 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
3594 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
3599 static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
3601 /* These are interrupts we'll toggle with the ring mask register */
3602 uint32_t gt_interrupts[] = {
3603 GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
3604 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
3605 GT_RENDER_L3_PARITY_ERROR_INTERRUPT |
3606 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT |
3607 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_BCS_IRQ_SHIFT,
3608 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
3609 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
3610 GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT |
3611 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VCS2_IRQ_SHIFT,
3613 GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT |
3614 GT_CONTEXT_SWITCH_INTERRUPT << GEN8_VECS_IRQ_SHIFT
3617 dev_priv->pm_irq_mask = 0xffffffff;
3618 GEN8_IRQ_INIT_NDX(GT, 0, ~gt_interrupts[0], gt_interrupts[0]);
3619 GEN8_IRQ_INIT_NDX(GT, 1, ~gt_interrupts[1], gt_interrupts[1]);
3621 * RPS interrupts will get enabled/disabled on demand when RPS itself
3622 * is enabled/disabled.
3624 GEN8_IRQ_INIT_NDX(GT, 2, dev_priv->pm_irq_mask, 0);
3625 GEN8_IRQ_INIT_NDX(GT, 3, ~gt_interrupts[3], gt_interrupts[3]);
3628 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
3630 uint32_t de_pipe_masked = GEN8_PIPE_CDCLK_CRC_DONE;
3631 uint32_t de_pipe_enables;
3632 u32 de_port_masked = GEN8_AUX_CHANNEL_A;
3633 u32 de_port_enables;
3636 if (INTEL_INFO(dev_priv)->gen >= 9) {
3637 de_pipe_masked |= GEN9_PIPE_PLANE1_FLIP_DONE |
3638 GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
3639 de_port_masked |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
3641 if (IS_BROXTON(dev_priv))
3642 de_port_masked |= BXT_DE_PORT_GMBUS;
3644 de_pipe_masked |= GEN8_PIPE_PRIMARY_FLIP_DONE |
3645 GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
3648 de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
3649 GEN8_PIPE_FIFO_UNDERRUN;
3651 de_port_enables = de_port_masked;
3652 if (IS_BROXTON(dev_priv))
3653 de_port_enables |= BXT_DE_PORT_HOTPLUG_MASK;
3654 else if (IS_BROADWELL(dev_priv))
3655 de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
3657 dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked;
3658 dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked;
3659 dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked;
3661 for_each_pipe(dev_priv, pipe)
3662 if (intel_display_power_is_enabled(dev_priv,
3663 POWER_DOMAIN_PIPE(pipe)))
3664 GEN8_IRQ_INIT_NDX(DE_PIPE, pipe,
3665 dev_priv->de_irq_mask[pipe],
3668 GEN5_IRQ_INIT(GEN8_DE_PORT_, ~de_port_masked, de_port_enables);
3671 static int gen8_irq_postinstall(struct drm_device *dev)
3673 struct drm_i915_private *dev_priv = dev->dev_private;
3675 if (HAS_PCH_SPLIT(dev))
3676 ibx_irq_pre_postinstall(dev);
3678 gen8_gt_irq_postinstall(dev_priv);
3679 gen8_de_irq_postinstall(dev_priv);
3681 if (HAS_PCH_SPLIT(dev))
3682 ibx_irq_postinstall(dev);
3684 I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
3685 POSTING_READ(GEN8_MASTER_IRQ);
3690 static int cherryview_irq_postinstall(struct drm_device *dev)
3692 struct drm_i915_private *dev_priv = dev->dev_private;
3694 vlv_display_irq_postinstall(dev_priv);
3696 gen8_gt_irq_postinstall(dev_priv);
3698 I915_WRITE(GEN8_MASTER_IRQ, MASTER_INTERRUPT_ENABLE);
3699 POSTING_READ(GEN8_MASTER_IRQ);
3704 static void gen8_irq_uninstall(struct drm_device *dev)
3706 struct drm_i915_private *dev_priv = dev->dev_private;
3711 gen8_irq_reset(dev);
3714 static void vlv_display_irq_uninstall(struct drm_i915_private *dev_priv)
3716 /* Interrupt setup is already guaranteed to be single-threaded, this is
3717 * just to make the assert_spin_locked check happy. */
3718 spin_lock_irq(&dev_priv->irq_lock);
3719 if (dev_priv->display_irqs_enabled)
3720 valleyview_display_irqs_uninstall(dev_priv);
3721 spin_unlock_irq(&dev_priv->irq_lock);
3723 vlv_display_irq_reset(dev_priv);
3725 dev_priv->irq_mask = ~0;
3728 static void valleyview_irq_uninstall(struct drm_device *dev)
3730 struct drm_i915_private *dev_priv = dev->dev_private;
3735 I915_WRITE(VLV_MASTER_IER, 0);
3737 gen5_gt_irq_reset(dev);
3739 I915_WRITE(HWSTAM, 0xffffffff);
3741 vlv_display_irq_uninstall(dev_priv);
3744 static void cherryview_irq_uninstall(struct drm_device *dev)
3746 struct drm_i915_private *dev_priv = dev->dev_private;
3751 I915_WRITE(GEN8_MASTER_IRQ, 0);
3752 POSTING_READ(GEN8_MASTER_IRQ);
3754 gen8_gt_irq_reset(dev_priv);
3756 GEN5_IRQ_RESET(GEN8_PCU_);
3758 vlv_display_irq_uninstall(dev_priv);
3761 static void ironlake_irq_uninstall(struct drm_device *dev)
3763 struct drm_i915_private *dev_priv = dev->dev_private;
3768 ironlake_irq_reset(dev);
3771 static void i8xx_irq_preinstall(struct drm_device * dev)
3773 struct drm_i915_private *dev_priv = dev->dev_private;
3776 for_each_pipe(dev_priv, pipe)
3777 I915_WRITE(PIPESTAT(pipe), 0);
3778 I915_WRITE16(IMR, 0xffff);
3779 I915_WRITE16(IER, 0x0);
3780 POSTING_READ16(IER);
3783 static int i8xx_irq_postinstall(struct drm_device *dev)
3785 struct drm_i915_private *dev_priv = dev->dev_private;
3788 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3790 /* Unmask the interrupts that we always want on. */
3791 dev_priv->irq_mask =
3792 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3793 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3794 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3795 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3796 I915_WRITE16(IMR, dev_priv->irq_mask);
3799 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3800 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3801 I915_USER_INTERRUPT);
3802 POSTING_READ16(IER);
3804 /* Interrupt setup is already guaranteed to be single-threaded, this is
3805 * just to make the assert_spin_locked check happy. */
3806 spin_lock_irq(&dev_priv->irq_lock);
3807 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3808 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3809 spin_unlock_irq(&dev_priv->irq_lock);
3815 * Returns true when a page flip has completed.
3817 static bool i8xx_handle_vblank(struct drm_device *dev,
3818 int plane, int pipe, u32 iir)
3820 struct drm_i915_private *dev_priv = dev->dev_private;
3821 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3823 if (!intel_pipe_handle_vblank(dev, pipe))
3826 if ((iir & flip_pending) == 0)
3827 goto check_page_flip;
3829 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3830 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3831 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3832 * the flip is completed (no longer pending). Since this doesn't raise
3833 * an interrupt per se, we watch for the change at vblank.
3835 if (I915_READ16(ISR) & flip_pending)
3836 goto check_page_flip;
3838 intel_prepare_page_flip(dev, plane);
3839 intel_finish_page_flip(dev, pipe);
3843 intel_check_page_flip(dev, pipe);
3847 static irqreturn_t i8xx_irq_handler(int irq, void *arg)
3849 struct drm_device *dev = arg;
3850 struct drm_i915_private *dev_priv = dev->dev_private;
3855 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3856 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3858 if (!intel_irqs_enabled(dev_priv))
3861 iir = I915_READ16(IIR);
3865 while (iir & ~flip_mask) {
3866 /* Can't rely on pipestat interrupt bit in iir as it might
3867 * have been cleared after the pipestat interrupt was received.
3868 * It doesn't set the bit in iir again, but it still produces
3869 * interrupts (for non-MSI).
3871 spin_lock(&dev_priv->irq_lock);
3872 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3873 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
3875 for_each_pipe(dev_priv, pipe) {
3876 int reg = PIPESTAT(pipe);
3877 pipe_stats[pipe] = I915_READ(reg);
3880 * Clear the PIPE*STAT regs before the IIR
3882 if (pipe_stats[pipe] & 0x8000ffff)
3883 I915_WRITE(reg, pipe_stats[pipe]);
3885 spin_unlock(&dev_priv->irq_lock);
3887 I915_WRITE16(IIR, iir & ~flip_mask);
3888 new_iir = I915_READ16(IIR); /* Flush posted writes */
3890 if (iir & I915_USER_INTERRUPT)
3891 notify_ring(&dev_priv->ring[RCS]);
3893 for_each_pipe(dev_priv, pipe) {
3898 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3899 i8xx_handle_vblank(dev, plane, pipe, iir))
3900 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3902 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3903 i9xx_pipe_crc_irq_handler(dev, pipe);
3905 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3906 intel_cpu_fifo_underrun_irq_handler(dev_priv,
3916 static void i8xx_irq_uninstall(struct drm_device * dev)
3918 struct drm_i915_private *dev_priv = dev->dev_private;
3921 for_each_pipe(dev_priv, pipe) {
3922 /* Clear enable bits; then clear status bits */
3923 I915_WRITE(PIPESTAT(pipe), 0);
3924 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3926 I915_WRITE16(IMR, 0xffff);
3927 I915_WRITE16(IER, 0x0);
3928 I915_WRITE16(IIR, I915_READ16(IIR));
3931 static void i915_irq_preinstall(struct drm_device * dev)
3933 struct drm_i915_private *dev_priv = dev->dev_private;
3936 if (I915_HAS_HOTPLUG(dev)) {
3937 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
3938 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3941 I915_WRITE16(HWSTAM, 0xeffe);
3942 for_each_pipe(dev_priv, pipe)
3943 I915_WRITE(PIPESTAT(pipe), 0);
3944 I915_WRITE(IMR, 0xffffffff);
3945 I915_WRITE(IER, 0x0);
3949 static int i915_irq_postinstall(struct drm_device *dev)
3951 struct drm_i915_private *dev_priv = dev->dev_private;
3954 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3956 /* Unmask the interrupts that we always want on. */
3957 dev_priv->irq_mask =
3958 ~(I915_ASLE_INTERRUPT |
3959 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3960 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3961 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3962 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3965 I915_ASLE_INTERRUPT |
3966 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3967 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3968 I915_USER_INTERRUPT;
3970 if (I915_HAS_HOTPLUG(dev)) {
3971 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
3972 POSTING_READ(PORT_HOTPLUG_EN);
3974 /* Enable in IER... */
3975 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
3976 /* and unmask in IMR */
3977 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
3980 I915_WRITE(IMR, dev_priv->irq_mask);
3981 I915_WRITE(IER, enable_mask);
3984 i915_enable_asle_pipestat(dev);
3986 /* Interrupt setup is already guaranteed to be single-threaded, this is
3987 * just to make the assert_spin_locked check happy. */
3988 spin_lock_irq(&dev_priv->irq_lock);
3989 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
3990 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
3991 spin_unlock_irq(&dev_priv->irq_lock);
3997 * Returns true when a page flip has completed.
3999 static bool i915_handle_vblank(struct drm_device *dev,
4000 int plane, int pipe, u32 iir)
4002 struct drm_i915_private *dev_priv = dev->dev_private;
4003 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
4005 if (!intel_pipe_handle_vblank(dev, pipe))
4008 if ((iir & flip_pending) == 0)
4009 goto check_page_flip;
4011 /* We detect FlipDone by looking for the change in PendingFlip from '1'
4012 * to '0' on the following vblank, i.e. IIR has the Pendingflip
4013 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
4014 * the flip is completed (no longer pending). Since this doesn't raise
4015 * an interrupt per se, we watch for the change at vblank.
4017 if (I915_READ(ISR) & flip_pending)
4018 goto check_page_flip;
4020 intel_prepare_page_flip(dev, plane);
4021 intel_finish_page_flip(dev, pipe);
4025 intel_check_page_flip(dev, pipe);
4029 static irqreturn_t i915_irq_handler(int irq, void *arg)
4031 struct drm_device *dev = arg;
4032 struct drm_i915_private *dev_priv = dev->dev_private;
4033 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
4035 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4036 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
4037 int pipe, ret = IRQ_NONE;
4039 if (!intel_irqs_enabled(dev_priv))
4042 iir = I915_READ(IIR);
4044 bool irq_received = (iir & ~flip_mask) != 0;
4045 bool blc_event = false;
4047 /* Can't rely on pipestat interrupt bit in iir as it might
4048 * have been cleared after the pipestat interrupt was received.
4049 * It doesn't set the bit in iir again, but it still produces
4050 * interrupts (for non-MSI).
4052 spin_lock(&dev_priv->irq_lock);
4053 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
4054 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
4056 for_each_pipe(dev_priv, pipe) {
4057 int reg = PIPESTAT(pipe);
4058 pipe_stats[pipe] = I915_READ(reg);
4060 /* Clear the PIPE*STAT regs before the IIR */
4061 if (pipe_stats[pipe] & 0x8000ffff) {
4062 I915_WRITE(reg, pipe_stats[pipe]);
4063 irq_received = true;
4066 spin_unlock(&dev_priv->irq_lock);
4071 /* Consume port. Then clear IIR or we'll miss events */
4072 if (I915_HAS_HOTPLUG(dev) &&
4073 iir & I915_DISPLAY_PORT_INTERRUPT)
4074 i9xx_hpd_irq_handler(dev);
4076 I915_WRITE(IIR, iir & ~flip_mask);
4077 new_iir = I915_READ(IIR); /* Flush posted writes */
4079 if (iir & I915_USER_INTERRUPT)
4080 notify_ring(&dev_priv->ring[RCS]);
4082 for_each_pipe(dev_priv, pipe) {
4087 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
4088 i915_handle_vblank(dev, plane, pipe, iir))
4089 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
4091 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
4094 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
4095 i9xx_pipe_crc_irq_handler(dev, pipe);
4097 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
4098 intel_cpu_fifo_underrun_irq_handler(dev_priv,
4102 if (blc_event || (iir & I915_ASLE_INTERRUPT))
4103 intel_opregion_asle_intr(dev);
4105 /* With MSI, interrupts are only generated when iir
4106 * transitions from zero to nonzero. If another bit got
4107 * set while we were handling the existing iir bits, then
4108 * we would never get another interrupt.
4110 * This is fine on non-MSI as well, as if we hit this path
4111 * we avoid exiting the interrupt handler only to generate
4114 * Note that for MSI this could cause a stray interrupt report
4115 * if an interrupt landed in the time between writing IIR and
4116 * the posting read. This should be rare enough to never
4117 * trigger the 99% of 100,000 interrupts test for disabling
4122 } while (iir & ~flip_mask);
4127 static void i915_irq_uninstall(struct drm_device * dev)
4129 struct drm_i915_private *dev_priv = dev->dev_private;
4132 if (I915_HAS_HOTPLUG(dev)) {
4133 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4134 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4137 I915_WRITE16(HWSTAM, 0xffff);
4138 for_each_pipe(dev_priv, pipe) {
4139 /* Clear enable bits; then clear status bits */
4140 I915_WRITE(PIPESTAT(pipe), 0);
4141 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
4143 I915_WRITE(IMR, 0xffffffff);
4144 I915_WRITE(IER, 0x0);
4146 I915_WRITE(IIR, I915_READ(IIR));
4149 static void i965_irq_preinstall(struct drm_device * dev)
4151 struct drm_i915_private *dev_priv = dev->dev_private;
4154 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4155 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4157 I915_WRITE(HWSTAM, 0xeffe);
4158 for_each_pipe(dev_priv, pipe)
4159 I915_WRITE(PIPESTAT(pipe), 0);
4160 I915_WRITE(IMR, 0xffffffff);
4161 I915_WRITE(IER, 0x0);
4165 static int i965_irq_postinstall(struct drm_device *dev)
4167 struct drm_i915_private *dev_priv = dev->dev_private;
4171 /* Unmask the interrupts that we always want on. */
4172 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
4173 I915_DISPLAY_PORT_INTERRUPT |
4174 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
4175 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
4176 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4177 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
4178 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
4180 enable_mask = ~dev_priv->irq_mask;
4181 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4182 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
4183 enable_mask |= I915_USER_INTERRUPT;
4186 enable_mask |= I915_BSD_USER_INTERRUPT;
4188 /* Interrupt setup is already guaranteed to be single-threaded, this is
4189 * just to make the assert_spin_locked check happy. */
4190 spin_lock_irq(&dev_priv->irq_lock);
4191 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_INTERRUPT_STATUS);
4192 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_INTERRUPT_STATUS);
4193 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_INTERRUPT_STATUS);
4194 spin_unlock_irq(&dev_priv->irq_lock);
4197 * Enable some error detection, note the instruction error mask
4198 * bit is reserved, so we leave it masked.
4201 error_mask = ~(GM45_ERROR_PAGE_TABLE |
4202 GM45_ERROR_MEM_PRIV |
4203 GM45_ERROR_CP_PRIV |
4204 I915_ERROR_MEMORY_REFRESH);
4206 error_mask = ~(I915_ERROR_PAGE_TABLE |
4207 I915_ERROR_MEMORY_REFRESH);
4209 I915_WRITE(EMR, error_mask);
4211 I915_WRITE(IMR, dev_priv->irq_mask);
4212 I915_WRITE(IER, enable_mask);
4215 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4216 POSTING_READ(PORT_HOTPLUG_EN);
4218 i915_enable_asle_pipestat(dev);
4223 static void i915_hpd_irq_setup(struct drm_device *dev)
4225 struct drm_i915_private *dev_priv = dev->dev_private;
4228 assert_spin_locked(&dev_priv->irq_lock);
4230 /* Note HDMI and DP share hotplug bits */
4231 /* enable bits are the same for all generations */
4232 hotplug_en = intel_hpd_enabled_irqs(dev, hpd_mask_i915);
4233 /* Programming the CRT detection parameters tends
4234 to generate a spurious hotplug event about three
4235 seconds later. So just do it once.
4238 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
4239 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
4241 /* Ignore TV since it's buggy */
4242 i915_hotplug_interrupt_update_locked(dev_priv,
4243 HOTPLUG_INT_EN_MASK |
4244 CRT_HOTPLUG_VOLTAGE_COMPARE_MASK |
4245 CRT_HOTPLUG_ACTIVATION_PERIOD_64,
4249 static irqreturn_t i965_irq_handler(int irq, void *arg)
4251 struct drm_device *dev = arg;
4252 struct drm_i915_private *dev_priv = dev->dev_private;
4254 u32 pipe_stats[I915_MAX_PIPES];
4255 int ret = IRQ_NONE, pipe;
4257 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
4258 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
4260 if (!intel_irqs_enabled(dev_priv))
4263 iir = I915_READ(IIR);
4266 bool irq_received = (iir & ~flip_mask) != 0;
4267 bool blc_event = false;
4269 /* Can't rely on pipestat interrupt bit in iir as it might
4270 * have been cleared after the pipestat interrupt was received.
4271 * It doesn't set the bit in iir again, but it still produces
4272 * interrupts (for non-MSI).
4274 spin_lock(&dev_priv->irq_lock);
4275 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
4276 DRM_DEBUG("Command parser error, iir 0x%08x\n", iir);
4278 for_each_pipe(dev_priv, pipe) {
4279 int reg = PIPESTAT(pipe);
4280 pipe_stats[pipe] = I915_READ(reg);
4283 * Clear the PIPE*STAT regs before the IIR
4285 if (pipe_stats[pipe] & 0x8000ffff) {
4286 I915_WRITE(reg, pipe_stats[pipe]);
4287 irq_received = true;
4290 spin_unlock(&dev_priv->irq_lock);
4297 /* Consume port. Then clear IIR or we'll miss events */
4298 if (iir & I915_DISPLAY_PORT_INTERRUPT)
4299 i9xx_hpd_irq_handler(dev);
4301 I915_WRITE(IIR, iir & ~flip_mask);
4302 new_iir = I915_READ(IIR); /* Flush posted writes */
4304 if (iir & I915_USER_INTERRUPT)
4305 notify_ring(&dev_priv->ring[RCS]);
4306 if (iir & I915_BSD_USER_INTERRUPT)
4307 notify_ring(&dev_priv->ring[VCS]);
4309 for_each_pipe(dev_priv, pipe) {
4310 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
4311 i915_handle_vblank(dev, pipe, pipe, iir))
4312 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
4314 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
4317 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
4318 i9xx_pipe_crc_irq_handler(dev, pipe);
4320 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
4321 intel_cpu_fifo_underrun_irq_handler(dev_priv, pipe);
4324 if (blc_event || (iir & I915_ASLE_INTERRUPT))
4325 intel_opregion_asle_intr(dev);
4327 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
4328 gmbus_irq_handler(dev);
4330 /* With MSI, interrupts are only generated when iir
4331 * transitions from zero to nonzero. If another bit got
4332 * set while we were handling the existing iir bits, then
4333 * we would never get another interrupt.
4335 * This is fine on non-MSI as well, as if we hit this path
4336 * we avoid exiting the interrupt handler only to generate
4339 * Note that for MSI this could cause a stray interrupt report
4340 * if an interrupt landed in the time between writing IIR and
4341 * the posting read. This should be rare enough to never
4342 * trigger the 99% of 100,000 interrupts test for disabling
4351 static void i965_irq_uninstall(struct drm_device * dev)
4353 struct drm_i915_private *dev_priv = dev->dev_private;
4359 i915_hotplug_interrupt_update(dev_priv, 0xffffffff, 0);
4360 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
4362 I915_WRITE(HWSTAM, 0xffffffff);
4363 for_each_pipe(dev_priv, pipe)
4364 I915_WRITE(PIPESTAT(pipe), 0);
4365 I915_WRITE(IMR, 0xffffffff);
4366 I915_WRITE(IER, 0x0);
4368 for_each_pipe(dev_priv, pipe)
4369 I915_WRITE(PIPESTAT(pipe),
4370 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
4371 I915_WRITE(IIR, I915_READ(IIR));
4375 * intel_irq_init - initializes irq support
4376 * @dev_priv: i915 device instance
4378 * This function initializes all the irq support including work items, timers
4379 * and all the vtables. It does not setup the interrupt itself though.
4381 void intel_irq_init(struct drm_i915_private *dev_priv)
4383 struct drm_device *dev = dev_priv->dev;
4385 intel_hpd_init_work(dev_priv);
4387 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
4388 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
4390 /* Let's track the enabled rps events */
4391 if (IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
4392 /* WaGsvRC0ResidencyMethod:vlv */
4393 dev_priv->pm_rps_events = GEN6_PM_RP_DOWN_EI_EXPIRED | GEN6_PM_RP_UP_EI_EXPIRED;
4395 dev_priv->pm_rps_events = GEN6_PM_RPS_EVENTS;
4397 INIT_DELAYED_WORK(&dev_priv->gpu_error.hangcheck_work,
4398 i915_hangcheck_elapsed);
4400 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
4402 if (IS_GEN2(dev_priv)) {
4403 dev->max_vblank_count = 0;
4404 dev->driver->get_vblank_counter = i8xx_get_vblank_counter;
4405 } else if (IS_G4X(dev_priv) || INTEL_INFO(dev_priv)->gen >= 5) {
4406 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
4407 dev->driver->get_vblank_counter = g4x_get_vblank_counter;
4409 dev->driver->get_vblank_counter = i915_get_vblank_counter;
4410 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
4414 * Opt out of the vblank disable timer on everything except gen2.
4415 * Gen2 doesn't have a hardware frame counter and so depends on
4416 * vblank interrupts to produce sane vblank seuquence numbers.
4418 if (!IS_GEN2(dev_priv))
4419 dev->vblank_disable_immediate = true;
4421 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
4422 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
4424 if (IS_CHERRYVIEW(dev_priv)) {
4425 dev->driver->irq_handler = cherryview_irq_handler;
4426 dev->driver->irq_preinstall = cherryview_irq_preinstall;
4427 dev->driver->irq_postinstall = cherryview_irq_postinstall;
4428 dev->driver->irq_uninstall = cherryview_irq_uninstall;
4429 dev->driver->enable_vblank = valleyview_enable_vblank;
4430 dev->driver->disable_vblank = valleyview_disable_vblank;
4431 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4432 } else if (IS_VALLEYVIEW(dev_priv)) {
4433 dev->driver->irq_handler = valleyview_irq_handler;
4434 dev->driver->irq_preinstall = valleyview_irq_preinstall;
4435 dev->driver->irq_postinstall = valleyview_irq_postinstall;
4436 dev->driver->irq_uninstall = valleyview_irq_uninstall;
4437 dev->driver->enable_vblank = valleyview_enable_vblank;
4438 dev->driver->disable_vblank = valleyview_disable_vblank;
4439 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4440 } else if (INTEL_INFO(dev_priv)->gen >= 8) {
4441 dev->driver->irq_handler = gen8_irq_handler;
4442 dev->driver->irq_preinstall = gen8_irq_reset;
4443 dev->driver->irq_postinstall = gen8_irq_postinstall;
4444 dev->driver->irq_uninstall = gen8_irq_uninstall;
4445 dev->driver->enable_vblank = gen8_enable_vblank;
4446 dev->driver->disable_vblank = gen8_disable_vblank;
4447 if (IS_BROXTON(dev))
4448 dev_priv->display.hpd_irq_setup = bxt_hpd_irq_setup;
4449 else if (HAS_PCH_SPT(dev))
4450 dev_priv->display.hpd_irq_setup = spt_hpd_irq_setup;
4452 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4453 } else if (HAS_PCH_SPLIT(dev)) {
4454 dev->driver->irq_handler = ironlake_irq_handler;
4455 dev->driver->irq_preinstall = ironlake_irq_reset;
4456 dev->driver->irq_postinstall = ironlake_irq_postinstall;
4457 dev->driver->irq_uninstall = ironlake_irq_uninstall;
4458 dev->driver->enable_vblank = ironlake_enable_vblank;
4459 dev->driver->disable_vblank = ironlake_disable_vblank;
4460 dev_priv->display.hpd_irq_setup = ilk_hpd_irq_setup;
4462 if (INTEL_INFO(dev_priv)->gen == 2) {
4463 dev->driver->irq_preinstall = i8xx_irq_preinstall;
4464 dev->driver->irq_postinstall = i8xx_irq_postinstall;
4465 dev->driver->irq_handler = i8xx_irq_handler;
4466 dev->driver->irq_uninstall = i8xx_irq_uninstall;
4467 } else if (INTEL_INFO(dev_priv)->gen == 3) {
4468 dev->driver->irq_preinstall = i915_irq_preinstall;
4469 dev->driver->irq_postinstall = i915_irq_postinstall;
4470 dev->driver->irq_uninstall = i915_irq_uninstall;
4471 dev->driver->irq_handler = i915_irq_handler;
4473 dev->driver->irq_preinstall = i965_irq_preinstall;
4474 dev->driver->irq_postinstall = i965_irq_postinstall;
4475 dev->driver->irq_uninstall = i965_irq_uninstall;
4476 dev->driver->irq_handler = i965_irq_handler;
4478 if (I915_HAS_HOTPLUG(dev_priv))
4479 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
4480 dev->driver->enable_vblank = i915_enable_vblank;
4481 dev->driver->disable_vblank = i915_disable_vblank;
4486 * intel_irq_install - enables the hardware interrupt
4487 * @dev_priv: i915 device instance
4489 * This function enables the hardware interrupt handling, but leaves the hotplug
4490 * handling still disabled. It is called after intel_irq_init().
4492 * In the driver load and resume code we need working interrupts in a few places
4493 * but don't want to deal with the hassle of concurrent probe and hotplug
4494 * workers. Hence the split into this two-stage approach.
4496 int intel_irq_install(struct drm_i915_private *dev_priv)
4499 * We enable some interrupt sources in our postinstall hooks, so mark
4500 * interrupts as enabled _before_ actually enabling them to avoid
4501 * special cases in our ordering checks.
4503 dev_priv->pm.irqs_enabled = true;
4505 return drm_irq_install(dev_priv->dev, dev_priv->dev->pdev->irq);
4509 * intel_irq_uninstall - finilizes all irq handling
4510 * @dev_priv: i915 device instance
4512 * This stops interrupt and hotplug handling and unregisters and frees all
4513 * resources acquired in the init functions.
4515 void intel_irq_uninstall(struct drm_i915_private *dev_priv)
4517 drm_irq_uninstall(dev_priv->dev);
4518 intel_hpd_cancel_work(dev_priv);
4519 dev_priv->pm.irqs_enabled = false;
4523 * intel_runtime_pm_disable_interrupts - runtime interrupt disabling
4524 * @dev_priv: i915 device instance
4526 * This function is used to disable interrupts at runtime, both in the runtime
4527 * pm and the system suspend/resume code.
4529 void intel_runtime_pm_disable_interrupts(struct drm_i915_private *dev_priv)
4531 dev_priv->dev->driver->irq_uninstall(dev_priv->dev);
4532 dev_priv->pm.irqs_enabled = false;
4533 synchronize_irq(dev_priv->dev->irq);
4537 * intel_runtime_pm_enable_interrupts - runtime interrupt enabling
4538 * @dev_priv: i915 device instance
4540 * This function is used to enable interrupts at runtime, both in the runtime
4541 * pm and the system suspend/resume code.
4543 void intel_runtime_pm_enable_interrupts(struct drm_i915_private *dev_priv)
4545 dev_priv->pm.irqs_enabled = true;
4546 dev_priv->dev->driver->irq_preinstall(dev_priv->dev);
4547 dev_priv->dev->driver->irq_postinstall(dev_priv->dev);