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.
30 #include <drm/i915_drm.h>
32 #include "i915_trace.h"
33 #include "intel_drv.h"
35 static const u32 hpd_ibx[] = {
36 [HPD_CRT] = SDE_CRT_HOTPLUG,
37 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG,
38 [HPD_PORT_B] = SDE_PORTB_HOTPLUG,
39 [HPD_PORT_C] = SDE_PORTC_HOTPLUG,
40 [HPD_PORT_D] = SDE_PORTD_HOTPLUG
43 static const u32 hpd_cpt[] = {
44 [HPD_CRT] = SDE_CRT_HOTPLUG_CPT,
45 [HPD_SDVO_B] = SDE_SDVOB_HOTPLUG_CPT,
46 [HPD_PORT_B] = SDE_PORTB_HOTPLUG_CPT,
47 [HPD_PORT_C] = SDE_PORTC_HOTPLUG_CPT,
48 [HPD_PORT_D] = SDE_PORTD_HOTPLUG_CPT
51 static const u32 hpd_mask_i915[] = {
52 [HPD_CRT] = CRT_HOTPLUG_INT_EN,
53 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_EN,
54 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_EN,
55 [HPD_PORT_B] = PORTB_HOTPLUG_INT_EN,
56 [HPD_PORT_C] = PORTC_HOTPLUG_INT_EN,
57 [HPD_PORT_D] = PORTD_HOTPLUG_INT_EN
60 static const u32 hpd_status_g4x[] = {
61 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
62 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_G4X,
63 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_G4X,
64 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
65 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
66 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
69 static const u32 hpd_status_i915[] = { /* i915 and valleyview are the same */
70 [HPD_CRT] = CRT_HOTPLUG_INT_STATUS,
71 [HPD_SDVO_B] = SDVOB_HOTPLUG_INT_STATUS_I915,
72 [HPD_SDVO_C] = SDVOC_HOTPLUG_INT_STATUS_I915,
73 [HPD_PORT_B] = PORTB_HOTPLUG_INT_STATUS,
74 [HPD_PORT_C] = PORTC_HOTPLUG_INT_STATUS,
75 [HPD_PORT_D] = PORTD_HOTPLUG_INT_STATUS
78 /* For display hotplug interrupt */
80 ironlake_enable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
82 assert_spin_locked(&dev_priv->irq_lock);
84 if (dev_priv->pc8.irqs_disabled) {
85 WARN(1, "IRQs disabled\n");
86 dev_priv->pc8.regsave.deimr &= ~mask;
90 if ((dev_priv->irq_mask & mask) != 0) {
91 dev_priv->irq_mask &= ~mask;
92 I915_WRITE(DEIMR, dev_priv->irq_mask);
98 ironlake_disable_display_irq(drm_i915_private_t *dev_priv, u32 mask)
100 assert_spin_locked(&dev_priv->irq_lock);
102 if (dev_priv->pc8.irqs_disabled) {
103 WARN(1, "IRQs disabled\n");
104 dev_priv->pc8.regsave.deimr |= mask;
108 if ((dev_priv->irq_mask & mask) != mask) {
109 dev_priv->irq_mask |= mask;
110 I915_WRITE(DEIMR, dev_priv->irq_mask);
116 * ilk_update_gt_irq - update GTIMR
117 * @dev_priv: driver private
118 * @interrupt_mask: mask of interrupt bits to update
119 * @enabled_irq_mask: mask of interrupt bits to enable
121 static void ilk_update_gt_irq(struct drm_i915_private *dev_priv,
122 uint32_t interrupt_mask,
123 uint32_t enabled_irq_mask)
125 assert_spin_locked(&dev_priv->irq_lock);
127 if (dev_priv->pc8.irqs_disabled) {
128 WARN(1, "IRQs disabled\n");
129 dev_priv->pc8.regsave.gtimr &= ~interrupt_mask;
130 dev_priv->pc8.regsave.gtimr |= (~enabled_irq_mask &
135 dev_priv->gt_irq_mask &= ~interrupt_mask;
136 dev_priv->gt_irq_mask |= (~enabled_irq_mask & interrupt_mask);
137 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
141 void ilk_enable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
143 ilk_update_gt_irq(dev_priv, mask, mask);
146 void ilk_disable_gt_irq(struct drm_i915_private *dev_priv, uint32_t mask)
148 ilk_update_gt_irq(dev_priv, mask, 0);
152 * snb_update_pm_irq - update GEN6_PMIMR
153 * @dev_priv: driver private
154 * @interrupt_mask: mask of interrupt bits to update
155 * @enabled_irq_mask: mask of interrupt bits to enable
157 static void snb_update_pm_irq(struct drm_i915_private *dev_priv,
158 uint32_t interrupt_mask,
159 uint32_t enabled_irq_mask)
163 assert_spin_locked(&dev_priv->irq_lock);
165 if (dev_priv->pc8.irqs_disabled) {
166 WARN(1, "IRQs disabled\n");
167 dev_priv->pc8.regsave.gen6_pmimr &= ~interrupt_mask;
168 dev_priv->pc8.regsave.gen6_pmimr |= (~enabled_irq_mask &
173 new_val = dev_priv->pm_irq_mask;
174 new_val &= ~interrupt_mask;
175 new_val |= (~enabled_irq_mask & interrupt_mask);
177 if (new_val != dev_priv->pm_irq_mask) {
178 dev_priv->pm_irq_mask = new_val;
179 I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
180 POSTING_READ(GEN6_PMIMR);
184 void snb_enable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
186 snb_update_pm_irq(dev_priv, mask, mask);
189 void snb_disable_pm_irq(struct drm_i915_private *dev_priv, uint32_t mask)
191 snb_update_pm_irq(dev_priv, mask, 0);
194 static bool ivb_can_enable_err_int(struct drm_device *dev)
196 struct drm_i915_private *dev_priv = dev->dev_private;
197 struct intel_crtc *crtc;
200 assert_spin_locked(&dev_priv->irq_lock);
202 for_each_pipe(pipe) {
203 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
205 if (crtc->cpu_fifo_underrun_disabled)
212 static bool cpt_can_enable_serr_int(struct drm_device *dev)
214 struct drm_i915_private *dev_priv = dev->dev_private;
216 struct intel_crtc *crtc;
218 assert_spin_locked(&dev_priv->irq_lock);
220 for_each_pipe(pipe) {
221 crtc = to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
223 if (crtc->pch_fifo_underrun_disabled)
230 static void ironlake_set_fifo_underrun_reporting(struct drm_device *dev,
231 enum i915_pipe pipe, bool enable)
233 struct drm_i915_private *dev_priv = dev->dev_private;
234 uint32_t bit = (pipe == PIPE_A) ? DE_PIPEA_FIFO_UNDERRUN :
235 DE_PIPEB_FIFO_UNDERRUN;
238 ironlake_enable_display_irq(dev_priv, bit);
240 ironlake_disable_display_irq(dev_priv, bit);
243 static void ivybridge_set_fifo_underrun_reporting(struct drm_device *dev,
244 enum i915_pipe pipe, bool enable)
246 struct drm_i915_private *dev_priv = dev->dev_private;
248 I915_WRITE(GEN7_ERR_INT, ERR_INT_FIFO_UNDERRUN(pipe));
250 if (!ivb_can_enable_err_int(dev))
253 ironlake_enable_display_irq(dev_priv, DE_ERR_INT_IVB);
255 bool was_enabled = !(I915_READ(DEIMR) & DE_ERR_INT_IVB);
257 /* Change the state _after_ we've read out the current one. */
258 ironlake_disable_display_irq(dev_priv, DE_ERR_INT_IVB);
261 (I915_READ(GEN7_ERR_INT) & ERR_INT_FIFO_UNDERRUN(pipe))) {
262 DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n",
268 static void broadwell_set_fifo_underrun_reporting(struct drm_device *dev,
269 enum i915_pipe pipe, bool enable)
271 struct drm_i915_private *dev_priv = dev->dev_private;
273 assert_spin_locked(&dev_priv->irq_lock);
276 dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_FIFO_UNDERRUN;
278 dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_FIFO_UNDERRUN;
279 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
280 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
284 * ibx_display_interrupt_update - update SDEIMR
285 * @dev_priv: driver private
286 * @interrupt_mask: mask of interrupt bits to update
287 * @enabled_irq_mask: mask of interrupt bits to enable
289 static void ibx_display_interrupt_update(struct drm_i915_private *dev_priv,
290 uint32_t interrupt_mask,
291 uint32_t enabled_irq_mask)
293 uint32_t sdeimr = I915_READ(SDEIMR);
294 sdeimr &= ~interrupt_mask;
295 sdeimr |= (~enabled_irq_mask & interrupt_mask);
297 assert_spin_locked(&dev_priv->irq_lock);
299 if (dev_priv->pc8.irqs_disabled &&
300 (interrupt_mask & SDE_HOTPLUG_MASK_CPT)) {
301 WARN(1, "IRQs disabled\n");
302 dev_priv->pc8.regsave.sdeimr &= ~interrupt_mask;
303 dev_priv->pc8.regsave.sdeimr |= (~enabled_irq_mask &
308 I915_WRITE(SDEIMR, sdeimr);
309 POSTING_READ(SDEIMR);
311 #define ibx_enable_display_interrupt(dev_priv, bits) \
312 ibx_display_interrupt_update((dev_priv), (bits), (bits))
313 #define ibx_disable_display_interrupt(dev_priv, bits) \
314 ibx_display_interrupt_update((dev_priv), (bits), 0)
316 static void ibx_set_fifo_underrun_reporting(struct drm_device *dev,
317 enum transcoder pch_transcoder,
320 struct drm_i915_private *dev_priv = dev->dev_private;
321 uint32_t bit = (pch_transcoder == TRANSCODER_A) ?
322 SDE_TRANSA_FIFO_UNDER : SDE_TRANSB_FIFO_UNDER;
325 ibx_enable_display_interrupt(dev_priv, bit);
327 ibx_disable_display_interrupt(dev_priv, bit);
330 static void cpt_set_fifo_underrun_reporting(struct drm_device *dev,
331 enum transcoder pch_transcoder,
334 struct drm_i915_private *dev_priv = dev->dev_private;
338 SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder));
340 if (!cpt_can_enable_serr_int(dev))
343 ibx_enable_display_interrupt(dev_priv, SDE_ERROR_CPT);
345 uint32_t tmp = I915_READ(SERR_INT);
346 bool was_enabled = !(I915_READ(SDEIMR) & SDE_ERROR_CPT);
348 /* Change the state _after_ we've read out the current one. */
349 ibx_disable_display_interrupt(dev_priv, SDE_ERROR_CPT);
352 (tmp & SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder))) {
353 DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n",
354 transcoder_name(pch_transcoder));
360 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
363 * @enable: true if we want to report FIFO underrun errors, false otherwise
365 * This function makes us disable or enable CPU fifo underruns for a specific
366 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
367 * reporting for one pipe may also disable all the other CPU error interruts for
368 * the other pipes, due to the fact that there's just one interrupt mask/enable
369 * bit for all the pipes.
371 * Returns the previous state of underrun reporting.
373 bool intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev,
374 enum i915_pipe pipe, bool enable)
376 struct drm_i915_private *dev_priv = dev->dev_private;
377 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
378 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
381 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
383 ret = !intel_crtc->cpu_fifo_underrun_disabled;
388 intel_crtc->cpu_fifo_underrun_disabled = !enable;
390 if (IS_GEN5(dev) || IS_GEN6(dev))
391 ironlake_set_fifo_underrun_reporting(dev, pipe, enable);
392 else if (IS_GEN7(dev))
393 ivybridge_set_fifo_underrun_reporting(dev, pipe, enable);
394 else if (IS_GEN8(dev))
395 broadwell_set_fifo_underrun_reporting(dev, pipe, enable);
398 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
403 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
405 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
406 * @enable: true if we want to report FIFO underrun errors, false otherwise
408 * This function makes us disable or enable PCH fifo underruns for a specific
409 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
410 * underrun reporting for one transcoder may also disable all the other PCH
411 * error interruts for the other transcoders, due to the fact that there's just
412 * one interrupt mask/enable bit for all the transcoders.
414 * Returns the previous state of underrun reporting.
416 bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev,
417 enum transcoder pch_transcoder,
420 struct drm_i915_private *dev_priv = dev->dev_private;
421 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
422 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
426 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
427 * has only one pch transcoder A that all pipes can use. To avoid racy
428 * pch transcoder -> pipe lookups from interrupt code simply store the
429 * underrun statistics in crtc A. Since we never expose this anywhere
430 * nor use it outside of the fifo underrun code here using the "wrong"
431 * crtc on LPT won't cause issues.
434 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
436 ret = !intel_crtc->pch_fifo_underrun_disabled;
441 intel_crtc->pch_fifo_underrun_disabled = !enable;
443 if (HAS_PCH_IBX(dev))
444 ibx_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
446 cpt_set_fifo_underrun_reporting(dev, pch_transcoder, enable);
449 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
455 i915_enable_pipestat(drm_i915_private_t *dev_priv, enum i915_pipe pipe, u32 mask)
457 u32 reg = PIPESTAT(pipe);
458 u32 pipestat = I915_READ(reg) & 0x7fff0000;
460 assert_spin_locked(&dev_priv->irq_lock);
462 if ((pipestat & mask) == mask)
465 /* Enable the interrupt, clear any pending status */
466 pipestat |= mask | (mask >> 16);
467 I915_WRITE(reg, pipestat);
472 i915_disable_pipestat(drm_i915_private_t *dev_priv, enum i915_pipe pipe, u32 mask)
474 u32 reg = PIPESTAT(pipe);
475 u32 pipestat = I915_READ(reg) & 0x7fff0000;
477 assert_spin_locked(&dev_priv->irq_lock);
479 if ((pipestat & mask) == 0)
483 I915_WRITE(reg, pipestat);
488 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
490 static void i915_enable_asle_pipestat(struct drm_device *dev)
492 drm_i915_private_t *dev_priv = dev->dev_private;
494 if (!dev_priv->opregion.asle || !IS_MOBILE(dev))
497 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
499 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_LEGACY_BLC_EVENT_ENABLE);
500 if (INTEL_INFO(dev)->gen >= 4)
501 i915_enable_pipestat(dev_priv, PIPE_A,
502 PIPE_LEGACY_BLC_EVENT_ENABLE);
504 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
508 * i915_pipe_enabled - check if a pipe is enabled
510 * @pipe: pipe to check
512 * Reading certain registers when the pipe is disabled can hang the chip.
513 * Use this routine to make sure the PLL is running and the pipe is active
514 * before reading such registers if unsure.
517 i915_pipe_enabled(struct drm_device *dev, int pipe)
519 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
521 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
522 /* Locking is horribly broken here, but whatever. */
523 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
524 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
526 return intel_crtc->active;
528 return I915_READ(PIPECONF(pipe)) & PIPECONF_ENABLE;
532 static u32 i8xx_get_vblank_counter(struct drm_device *dev, int pipe)
534 /* Gen2 doesn't have a hardware frame counter */
538 /* Called from drm generic code, passed a 'crtc', which
539 * we use as a pipe index
541 static u32 i915_get_vblank_counter(struct drm_device *dev, int pipe)
543 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
544 unsigned long high_frame;
545 unsigned long low_frame;
546 u32 high1, high2, low, pixel, vbl_start;
548 if (!i915_pipe_enabled(dev, pipe)) {
549 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
550 "pipe %c\n", pipe_name(pipe));
554 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
555 struct intel_crtc *intel_crtc =
556 to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
557 const struct drm_display_mode *mode =
558 &intel_crtc->config.adjusted_mode;
560 vbl_start = mode->crtc_vblank_start * mode->crtc_htotal;
562 enum transcoder cpu_transcoder = (enum transcoder) pipe;
565 htotal = ((I915_READ(HTOTAL(cpu_transcoder)) >> 16) & 0x1fff) + 1;
566 vbl_start = (I915_READ(VBLANK(cpu_transcoder)) & 0x1fff) + 1;
571 high_frame = PIPEFRAME(pipe);
572 low_frame = PIPEFRAMEPIXEL(pipe);
575 * High & low register fields aren't synchronized, so make sure
576 * we get a low value that's stable across two reads of the high
580 high1 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
581 low = I915_READ(low_frame);
582 high2 = I915_READ(high_frame) & PIPE_FRAME_HIGH_MASK;
583 } while (high1 != high2);
585 high1 >>= PIPE_FRAME_HIGH_SHIFT;
586 pixel = low & PIPE_PIXEL_MASK;
587 low >>= PIPE_FRAME_LOW_SHIFT;
590 * The frame counter increments at beginning of active.
591 * Cook up a vblank counter by also checking the pixel
592 * counter against vblank start.
594 return (((high1 << 8) | low) + (pixel >= vbl_start)) & 0xffffff;
597 static u32 gm45_get_vblank_counter(struct drm_device *dev, int pipe)
599 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
600 int reg = PIPE_FRMCOUNT_GM45(pipe);
602 if (!i915_pipe_enabled(dev, pipe)) {
603 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
604 "pipe %c\n", pipe_name(pipe));
608 return I915_READ(reg);
611 /* raw reads, only for fast reads of display block, no need for forcewake etc. */
612 #define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
614 static bool ilk_pipe_in_vblank_locked(struct drm_device *dev, enum i915_pipe pipe)
616 struct drm_i915_private *dev_priv = dev->dev_private;
620 if (INTEL_INFO(dev)->gen >= 8) {
621 status = GEN8_PIPE_VBLANK;
622 reg = GEN8_DE_PIPE_ISR(pipe);
623 } else if (INTEL_INFO(dev)->gen >= 7) {
624 status = DE_PIPE_VBLANK_IVB(pipe);
627 status = DE_PIPE_VBLANK(pipe);
631 return __raw_i915_read32(dev_priv, reg) & status;
634 static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
635 int *vpos, int *hpos)
637 struct drm_i915_private *dev_priv = dev->dev_private;
638 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
639 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
640 const struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode;
642 int vbl_start, vbl_end, htotal, vtotal;
646 if (!intel_crtc->active) {
647 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
648 "pipe %c\n", pipe_name(pipe));
652 htotal = mode->crtc_htotal;
653 vtotal = mode->crtc_vtotal;
654 vbl_start = mode->crtc_vblank_start;
655 vbl_end = mode->crtc_vblank_end;
657 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
658 vbl_start = DIV_ROUND_UP(vbl_start, 2);
663 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
666 * Lock uncore.lock, as we will do multiple timing critical raw
667 * register reads, potentially with preemption disabled, so the
668 * following code must not block on uncore.lock.
670 lockmgr(&dev_priv->uncore.lock, LK_EXCLUSIVE);
672 /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
674 /* Get optional system timestamp before query. */
677 *stime = ktime_get();
680 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
681 /* No obvious pixelcount register. Only query vertical
682 * scanout position from Display scan line register.
685 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
687 position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
691 * On HSW HDMI outputs there seems to be a 2 line
692 * difference, whereas eDP has the normal 1 line
693 * difference that earlier platforms have. External
694 * DP is unknown. For now just check for the 2 line
695 * difference case on all output types on HSW+.
697 * This might misinterpret the scanline counter being
698 * one line too far along on eDP, but that's less
699 * dangerous than the alternative since that would lead
700 * the vblank timestamp code astray when it sees a
701 * scanline count before vblank_start during a vblank
704 in_vbl = ilk_pipe_in_vblank_locked(dev, pipe);
705 if ((in_vbl && (position == vbl_start - 2 ||
706 position == vbl_start - 1)) ||
707 (!in_vbl && (position == vbl_end - 2 ||
708 position == vbl_end - 1)))
709 position = (position + 2) % vtotal;
710 } else if (HAS_PCH_SPLIT(dev)) {
712 * The scanline counter increments at the leading edge
713 * of hsync, ie. it completely misses the active portion
714 * of the line. Fix up the counter at both edges of vblank
715 * to get a more accurate picture whether we're in vblank
718 in_vbl = ilk_pipe_in_vblank_locked(dev, pipe);
719 if ((in_vbl && position == vbl_start - 1) ||
720 (!in_vbl && position == vbl_end - 1))
721 position = (position + 1) % vtotal;
724 * ISR vblank status bits don't work the way we'd want
725 * them to work on non-PCH platforms (for
726 * ilk_pipe_in_vblank_locked()), and there doesn't
727 * appear any other way to determine if we're currently
730 * Instead let's assume that we're already in vblank if
731 * we got called from the vblank interrupt and the
732 * scanline counter value indicates that we're on the
733 * line just prior to vblank start. This should result
734 * in the correct answer, unless the vblank interrupt
735 * delivery really got delayed for almost exactly one
739 if (flags & DRM_CALLED_FROM_VBLIRQ &&
740 position == vbl_start - 1) {
741 position = (position + 1) % vtotal;
743 /* Signal this correction as "applied". */
749 /* Have access to pixelcount since start of frame.
750 * We can split this into vertical and horizontal
753 position = (__raw_i915_read32(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
755 /* convert to pixel counts */
761 /* Get optional system timestamp after query. */
764 *etime = ktime_get();
767 /* preempt_enable_rt() should go right here in PREEMPT_RT patchset. */
769 lockmgr(&dev_priv->uncore.lock, LK_RELEASE);
771 in_vbl = position >= vbl_start && position < vbl_end;
774 * While in vblank, position will be negative
775 * counting up towards 0 at vbl_end. And outside
776 * vblank, position will be positive counting
779 if (position >= vbl_start)
782 position += vtotal - vbl_end;
784 if (IS_GEN2(dev) || IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
788 *vpos = position / htotal;
789 *hpos = position - (*vpos * htotal);
794 ret |= DRM_SCANOUTPOS_INVBL;
799 static int i915_get_vblank_timestamp(struct drm_device *dev, int pipe,
801 struct timeval *vblank_time,
804 struct drm_crtc *crtc;
806 if (pipe < 0 || pipe >= INTEL_INFO(dev)->num_pipes) {
807 DRM_ERROR("Invalid crtc %d\n", pipe);
811 /* Get drm_crtc to timestamp: */
812 crtc = intel_get_crtc_for_pipe(dev, pipe);
814 DRM_ERROR("Invalid crtc %d\n", pipe);
818 if (!crtc->enabled) {
819 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe);
823 /* Helper routine in DRM core does all the work: */
824 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
829 static bool intel_hpd_irq_event(struct drm_device *dev,
830 struct drm_connector *connector)
832 enum drm_connector_status old_status;
834 WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
835 old_status = connector->status;
837 connector->status = connector->funcs->detect(connector, false);
838 if (old_status == connector->status)
841 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
843 drm_get_connector_name(connector),
844 drm_get_connector_status_name(old_status),
845 drm_get_connector_status_name(connector->status));
851 * Handle hotplug events outside the interrupt handler proper.
853 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
855 static void i915_hotplug_work_func(struct work_struct *work)
857 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
859 struct drm_device *dev = dev_priv->dev;
860 struct drm_mode_config *mode_config = &dev->mode_config;
861 struct intel_connector *intel_connector;
862 struct intel_encoder *intel_encoder;
863 struct drm_connector *connector;
864 bool hpd_disabled = false;
865 bool changed = false;
868 /* HPD irq before everything is fully set up. */
869 if (!dev_priv->enable_hotplug_processing)
872 mutex_lock(&mode_config->mutex);
873 DRM_DEBUG_KMS("running encoder hotplug functions\n");
875 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
877 hpd_event_bits = dev_priv->hpd_event_bits;
878 dev_priv->hpd_event_bits = 0;
879 list_for_each_entry(connector, &mode_config->connector_list, head) {
880 intel_connector = to_intel_connector(connector);
881 intel_encoder = intel_connector->encoder;
882 if (intel_encoder->hpd_pin > HPD_NONE &&
883 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_MARK_DISABLED &&
884 connector->polled == DRM_CONNECTOR_POLL_HPD) {
885 DRM_INFO("HPD interrupt storm detected on connector %s: "
886 "switching from hotplug detection to polling\n",
887 drm_get_connector_name(connector));
888 dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark = HPD_DISABLED;
889 connector->polled = DRM_CONNECTOR_POLL_CONNECT
890 | DRM_CONNECTOR_POLL_DISCONNECT;
893 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
894 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
895 drm_get_connector_name(connector), intel_encoder->hpd_pin);
898 /* if there were no outputs to poll, poll was disabled,
899 * therefore make sure it's enabled when disabling HPD on
902 drm_kms_helper_poll_enable(dev);
903 mod_timer(&dev_priv->hotplug_reenable_timer,
904 jiffies + msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY));
907 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
909 list_for_each_entry(connector, &mode_config->connector_list, head) {
910 intel_connector = to_intel_connector(connector);
911 intel_encoder = intel_connector->encoder;
912 if (hpd_event_bits & (1 << intel_encoder->hpd_pin)) {
913 if (intel_encoder->hot_plug)
914 intel_encoder->hot_plug(intel_encoder);
915 if (intel_hpd_irq_event(dev, connector))
919 mutex_unlock(&mode_config->mutex);
922 drm_kms_helper_hotplug_event(dev);
925 static void ironlake_rps_change_irq_handler(struct drm_device *dev)
927 drm_i915_private_t *dev_priv = dev->dev_private;
928 u32 busy_up, busy_down, max_avg, min_avg;
931 lockmgr(&mchdev_lock, LK_EXCLUSIVE);
933 I915_WRITE16(MEMINTRSTS, I915_READ(MEMINTRSTS));
935 new_delay = dev_priv->ips.cur_delay;
937 I915_WRITE16(MEMINTRSTS, MEMINT_EVAL_CHG);
938 busy_up = I915_READ(RCPREVBSYTUPAVG);
939 busy_down = I915_READ(RCPREVBSYTDNAVG);
940 max_avg = I915_READ(RCBMAXAVG);
941 min_avg = I915_READ(RCBMINAVG);
943 /* Handle RCS change request from hw */
944 if (busy_up > max_avg) {
945 if (dev_priv->ips.cur_delay != dev_priv->ips.max_delay)
946 new_delay = dev_priv->ips.cur_delay - 1;
947 if (new_delay < dev_priv->ips.max_delay)
948 new_delay = dev_priv->ips.max_delay;
949 } else if (busy_down < min_avg) {
950 if (dev_priv->ips.cur_delay != dev_priv->ips.min_delay)
951 new_delay = dev_priv->ips.cur_delay + 1;
952 if (new_delay > dev_priv->ips.min_delay)
953 new_delay = dev_priv->ips.min_delay;
956 if (ironlake_set_drps(dev, new_delay))
957 dev_priv->ips.cur_delay = new_delay;
959 lockmgr(&mchdev_lock, LK_RELEASE);
964 static void notify_ring(struct drm_device *dev,
965 struct intel_ring_buffer *ring)
967 if (ring->obj == NULL)
970 trace_i915_gem_request_complete(ring);
972 wake_up_all(&ring->irq_queue);
973 i915_queue_hangcheck(dev);
976 static void gen6_pm_rps_work(struct work_struct *work)
978 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
983 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
984 pm_iir = dev_priv->rps.pm_iir;
985 dev_priv->rps.pm_iir = 0;
986 /* Make sure not to corrupt PMIMR state used by ringbuffer code */
987 snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS);
988 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
990 /* Make sure we didn't queue anything we're not going to process. */
991 WARN_ON(pm_iir & ~GEN6_PM_RPS_EVENTS);
993 if ((pm_iir & GEN6_PM_RPS_EVENTS) == 0)
996 mutex_lock(&dev_priv->rps.hw_lock);
998 adj = dev_priv->rps.last_adj;
999 if (pm_iir & GEN6_PM_RP_UP_THRESHOLD) {
1004 new_delay = dev_priv->rps.cur_delay + adj;
1007 * For better performance, jump directly
1008 * to RPe if we're below it.
1010 if (new_delay < dev_priv->rps.rpe_delay)
1011 new_delay = dev_priv->rps.rpe_delay;
1012 } else if (pm_iir & GEN6_PM_RP_DOWN_TIMEOUT) {
1013 if (dev_priv->rps.cur_delay > dev_priv->rps.rpe_delay)
1014 new_delay = dev_priv->rps.rpe_delay;
1016 new_delay = dev_priv->rps.min_delay;
1018 } else if (pm_iir & GEN6_PM_RP_DOWN_THRESHOLD) {
1023 new_delay = dev_priv->rps.cur_delay + adj;
1024 } else { /* unknown event */
1025 new_delay = dev_priv->rps.cur_delay;
1028 /* sysfs frequency interfaces may have snuck in while servicing the
1031 new_delay = clamp_t(int, new_delay,
1032 dev_priv->rps.min_delay, dev_priv->rps.max_delay);
1033 dev_priv->rps.last_adj = new_delay - dev_priv->rps.cur_delay;
1035 if (IS_VALLEYVIEW(dev_priv->dev))
1036 valleyview_set_rps(dev_priv->dev, new_delay);
1038 gen6_set_rps(dev_priv->dev, new_delay);
1040 mutex_unlock(&dev_priv->rps.hw_lock);
1045 * ivybridge_parity_work - Workqueue called when a parity error interrupt
1047 * @work: workqueue struct
1049 * Doesn't actually do anything except notify userspace. As a consequence of
1050 * this event, userspace should try to remap the bad rows since statistically
1051 * it is likely the same row is more likely to go bad again.
1053 static void ivybridge_parity_work(struct work_struct *work)
1055 drm_i915_private_t *dev_priv = container_of(work, drm_i915_private_t,
1056 l3_parity.error_work);
1057 u32 error_status, row, bank, subbank;
1058 char *parity_event[6];
1062 /* We must turn off DOP level clock gating to access the L3 registers.
1063 * In order to prevent a get/put style interface, acquire struct mutex
1064 * any time we access those registers.
1066 mutex_lock(&dev_priv->dev->struct_mutex);
1068 /* If we've screwed up tracking, just let the interrupt fire again */
1069 if (WARN_ON(!dev_priv->l3_parity.which_slice))
1072 misccpctl = I915_READ(GEN7_MISCCPCTL);
1073 I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
1074 POSTING_READ(GEN7_MISCCPCTL);
1076 while ((slice = ffs(dev_priv->l3_parity.which_slice)) != 0) {
1080 if (WARN_ON_ONCE(slice >= NUM_L3_SLICES(dev_priv->dev)))
1083 dev_priv->l3_parity.which_slice &= ~(1<<slice);
1085 reg = GEN7_L3CDERRST1 + (slice * 0x200);
1087 error_status = I915_READ(reg);
1088 row = GEN7_PARITY_ERROR_ROW(error_status);
1089 bank = GEN7_PARITY_ERROR_BANK(error_status);
1090 subbank = GEN7_PARITY_ERROR_SUBBANK(error_status);
1092 I915_WRITE(reg, GEN7_PARITY_ERROR_VALID | GEN7_L3CDERRST1_ENABLE);
1095 parity_event[0] = I915_L3_PARITY_UEVENT "=1";
1096 parity_event[5] = NULL;
1099 kobject_uevent_env(&dev_priv->dev->primary->kdev->kobj,
1100 KOBJ_CHANGE, parity_event);
1103 DRM_DEBUG("Parity error: Slice = %d, Row = %d, Bank = %d, Sub bank = %d.\n",
1104 slice, row, bank, subbank);
1107 kfree(parity_event[4]);
1108 kfree(parity_event[3]);
1109 kfree(parity_event[2]);
1110 kfree(parity_event[1]);
1114 I915_WRITE(GEN7_MISCCPCTL, misccpctl);
1117 WARN_ON(dev_priv->l3_parity.which_slice);
1118 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
1119 ilk_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv->dev));
1120 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
1122 mutex_unlock(&dev_priv->dev->struct_mutex);
1125 static void ivybridge_parity_error_irq_handler(struct drm_device *dev, u32 iir)
1127 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1129 if (!HAS_L3_DPF(dev))
1132 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
1133 ilk_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev));
1134 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
1136 iir &= GT_PARITY_ERROR(dev);
1137 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT_S1)
1138 dev_priv->l3_parity.which_slice |= 1 << 1;
1140 if (iir & GT_RENDER_L3_PARITY_ERROR_INTERRUPT)
1141 dev_priv->l3_parity.which_slice |= 1 << 0;
1143 queue_work(dev_priv->wq, &dev_priv->l3_parity.error_work);
1146 static void ilk_gt_irq_handler(struct drm_device *dev,
1147 struct drm_i915_private *dev_priv,
1151 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1152 notify_ring(dev, &dev_priv->ring[RCS]);
1153 if (gt_iir & ILK_BSD_USER_INTERRUPT)
1154 notify_ring(dev, &dev_priv->ring[VCS]);
1157 static void snb_gt_irq_handler(struct drm_device *dev,
1158 struct drm_i915_private *dev_priv,
1163 (GT_RENDER_USER_INTERRUPT | GT_RENDER_PIPECTL_NOTIFY_INTERRUPT))
1164 notify_ring(dev, &dev_priv->ring[RCS]);
1165 if (gt_iir & GT_BSD_USER_INTERRUPT)
1166 notify_ring(dev, &dev_priv->ring[VCS]);
1167 if (gt_iir & GT_BLT_USER_INTERRUPT)
1168 notify_ring(dev, &dev_priv->ring[BCS]);
1170 if (gt_iir & (GT_BLT_CS_ERROR_INTERRUPT |
1171 GT_BSD_CS_ERROR_INTERRUPT |
1172 GT_RENDER_CS_MASTER_ERROR_INTERRUPT)) {
1173 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir);
1174 i915_handle_error(dev, false);
1177 if (gt_iir & GT_PARITY_ERROR(dev))
1178 ivybridge_parity_error_irq_handler(dev, gt_iir);
1181 static irqreturn_t gen8_gt_irq_handler(struct drm_device *dev,
1182 struct drm_i915_private *dev_priv,
1188 if (master_ctl & (GEN8_GT_RCS_IRQ | GEN8_GT_BCS_IRQ)) {
1189 tmp = I915_READ(GEN8_GT_IIR(0));
1191 rcs = tmp >> GEN8_RCS_IRQ_SHIFT;
1192 bcs = tmp >> GEN8_BCS_IRQ_SHIFT;
1193 if (rcs & GT_RENDER_USER_INTERRUPT)
1194 notify_ring(dev, &dev_priv->ring[RCS]);
1195 if (bcs & GT_RENDER_USER_INTERRUPT)
1196 notify_ring(dev, &dev_priv->ring[BCS]);
1197 I915_WRITE(GEN8_GT_IIR(0), tmp);
1199 DRM_ERROR("The master control interrupt lied (GT0)!\n");
1202 if (master_ctl & GEN8_GT_VCS1_IRQ) {
1203 tmp = I915_READ(GEN8_GT_IIR(1));
1205 vcs = tmp >> GEN8_VCS1_IRQ_SHIFT;
1206 if (vcs & GT_RENDER_USER_INTERRUPT)
1207 notify_ring(dev, &dev_priv->ring[VCS]);
1208 I915_WRITE(GEN8_GT_IIR(1), tmp);
1210 DRM_ERROR("The master control interrupt lied (GT1)!\n");
1213 if (master_ctl & GEN8_GT_VECS_IRQ) {
1214 tmp = I915_READ(GEN8_GT_IIR(3));
1216 vcs = tmp >> GEN8_VECS_IRQ_SHIFT;
1217 if (vcs & GT_RENDER_USER_INTERRUPT)
1218 notify_ring(dev, &dev_priv->ring[VECS]);
1219 I915_WRITE(GEN8_GT_IIR(3), tmp);
1221 DRM_ERROR("The master control interrupt lied (GT3)!\n");
1226 #define HPD_STORM_DETECT_PERIOD 1000
1227 #define HPD_STORM_THRESHOLD 5
1229 static inline void intel_hpd_irq_handler(struct drm_device *dev,
1230 u32 hotplug_trigger,
1233 drm_i915_private_t *dev_priv = dev->dev_private;
1235 bool storm_detected = false;
1237 if (!hotplug_trigger)
1240 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
1241 for (i = 1; i < HPD_NUM_PINS; i++) {
1243 WARN_ONCE(hpd[i] & hotplug_trigger &&
1244 dev_priv->hpd_stats[i].hpd_mark == HPD_DISABLED,
1245 "Received HPD interrupt (0x%08x) on pin %d (0x%08x) although disabled\n",
1246 hotplug_trigger, i, hpd[i]);
1248 if (!(hpd[i] & hotplug_trigger) ||
1249 dev_priv->hpd_stats[i].hpd_mark != HPD_ENABLED)
1252 dev_priv->hpd_event_bits |= (1 << i);
1253 if (!time_in_range(jiffies, dev_priv->hpd_stats[i].hpd_last_jiffies,
1254 dev_priv->hpd_stats[i].hpd_last_jiffies
1255 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD))) {
1256 dev_priv->hpd_stats[i].hpd_last_jiffies = jiffies;
1257 dev_priv->hpd_stats[i].hpd_cnt = 0;
1258 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i);
1259 } else if (dev_priv->hpd_stats[i].hpd_cnt > HPD_STORM_THRESHOLD) {
1260 dev_priv->hpd_stats[i].hpd_mark = HPD_MARK_DISABLED;
1261 dev_priv->hpd_event_bits &= ~(1 << i);
1262 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i);
1263 storm_detected = true;
1265 dev_priv->hpd_stats[i].hpd_cnt++;
1266 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i,
1267 dev_priv->hpd_stats[i].hpd_cnt);
1272 dev_priv->display.hpd_irq_setup(dev);
1273 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
1276 * Our hotplug handler can grab modeset locks (by calling down into the
1277 * fb helpers). Hence it must not be run on our own dev-priv->wq work
1278 * queue for otherwise the flush_work in the pageflip code will
1281 schedule_work(&dev_priv->hotplug_work);
1284 static void gmbus_irq_handler(struct drm_device *dev)
1286 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
1288 wake_up_all(&dev_priv->gmbus_wait_queue);
1291 static void dp_aux_irq_handler(struct drm_device *dev)
1293 struct drm_i915_private *dev_priv = (drm_i915_private_t *) dev->dev_private;
1295 wake_up_all(&dev_priv->gmbus_wait_queue);
1298 #if defined(CONFIG_DEBUG_FS)
1299 static void display_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe,
1300 uint32_t crc0, uint32_t crc1,
1301 uint32_t crc2, uint32_t crc3,
1304 struct drm_i915_private *dev_priv = dev->dev_private;
1305 struct intel_pipe_crc *pipe_crc = &dev_priv->pipe_crc[pipe];
1306 struct intel_pipe_crc_entry *entry;
1309 spin_lock(&pipe_crc->lock);
1311 if (!pipe_crc->entries) {
1312 spin_unlock(&pipe_crc->lock);
1313 DRM_ERROR("spurious interrupt\n");
1317 head = pipe_crc->head;
1318 tail = pipe_crc->tail;
1320 if (CIRC_SPACE(head, tail, INTEL_PIPE_CRC_ENTRIES_NR) < 1) {
1321 spin_unlock(&pipe_crc->lock);
1322 DRM_ERROR("CRC buffer overflowing\n");
1326 entry = &pipe_crc->entries[head];
1328 entry->frame = dev->driver->get_vblank_counter(dev, pipe);
1329 entry->crc[0] = crc0;
1330 entry->crc[1] = crc1;
1331 entry->crc[2] = crc2;
1332 entry->crc[3] = crc3;
1333 entry->crc[4] = crc4;
1335 head = (head + 1) & (INTEL_PIPE_CRC_ENTRIES_NR - 1);
1336 pipe_crc->head = head;
1338 spin_unlock(&pipe_crc->lock);
1340 wake_up_interruptible(&pipe_crc->wq);
1344 display_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe,
1345 uint32_t crc0, uint32_t crc1,
1346 uint32_t crc2, uint32_t crc3,
1351 static void hsw_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe)
1353 struct drm_i915_private *dev_priv = dev->dev_private;
1355 display_pipe_crc_irq_handler(dev, pipe,
1356 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1360 static void ivb_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe)
1362 struct drm_i915_private *dev_priv = dev->dev_private;
1364 display_pipe_crc_irq_handler(dev, pipe,
1365 I915_READ(PIPE_CRC_RES_1_IVB(pipe)),
1366 I915_READ(PIPE_CRC_RES_2_IVB(pipe)),
1367 I915_READ(PIPE_CRC_RES_3_IVB(pipe)),
1368 I915_READ(PIPE_CRC_RES_4_IVB(pipe)),
1369 I915_READ(PIPE_CRC_RES_5_IVB(pipe)));
1372 static void i9xx_pipe_crc_irq_handler(struct drm_device *dev, enum i915_pipe pipe)
1374 struct drm_i915_private *dev_priv = dev->dev_private;
1375 uint32_t res1, res2;
1377 if (INTEL_INFO(dev)->gen >= 3)
1378 res1 = I915_READ(PIPE_CRC_RES_RES1_I915(pipe));
1382 if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
1383 res2 = I915_READ(PIPE_CRC_RES_RES2_G4X(pipe));
1387 display_pipe_crc_irq_handler(dev, pipe,
1388 I915_READ(PIPE_CRC_RES_RED(pipe)),
1389 I915_READ(PIPE_CRC_RES_GREEN(pipe)),
1390 I915_READ(PIPE_CRC_RES_BLUE(pipe)),
1394 /* The RPS events need forcewake, so we add them to a work queue and mask their
1395 * IMR bits until the work is done. Other interrupts can be processed without
1396 * the work queue. */
1397 static void gen6_rps_irq_handler(struct drm_i915_private *dev_priv, u32 pm_iir)
1399 if (pm_iir & GEN6_PM_RPS_EVENTS) {
1400 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
1401 dev_priv->rps.pm_iir |= pm_iir & GEN6_PM_RPS_EVENTS;
1402 snb_disable_pm_irq(dev_priv, pm_iir & GEN6_PM_RPS_EVENTS);
1403 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
1405 queue_work(dev_priv->wq, &dev_priv->rps.work);
1408 if (HAS_VEBOX(dev_priv->dev)) {
1409 if (pm_iir & PM_VEBOX_USER_INTERRUPT)
1410 notify_ring(dev_priv->dev, &dev_priv->ring[VECS]);
1412 if (pm_iir & PM_VEBOX_CS_ERROR_INTERRUPT) {
1413 DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir);
1414 i915_handle_error(dev_priv->dev, false);
1419 static irqreturn_t valleyview_irq_handler(void *arg)
1421 struct drm_device *dev = (struct drm_device *) arg;
1422 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1423 u32 iir, gt_iir, pm_iir;
1425 u32 pipe_stats[I915_MAX_PIPES];
1427 atomic_inc(&dev_priv->irq_received);
1430 iir = I915_READ(VLV_IIR);
1431 gt_iir = I915_READ(GTIIR);
1432 pm_iir = I915_READ(GEN6_PMIIR);
1434 if (gt_iir == 0 && pm_iir == 0 && iir == 0)
1438 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1440 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
1441 for_each_pipe(pipe) {
1442 int reg = PIPESTAT(pipe);
1443 pipe_stats[pipe] = I915_READ(reg);
1446 * Clear the PIPE*STAT regs before the IIR
1448 if (pipe_stats[pipe] & 0x8000ffff) {
1449 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
1450 DRM_DEBUG_DRIVER("pipe %c underrun\n",
1452 I915_WRITE(reg, pipe_stats[pipe]);
1455 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
1457 for_each_pipe(pipe) {
1458 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS)
1459 drm_handle_vblank(dev, pipe);
1461 if (pipe_stats[pipe] & PLANE_FLIPDONE_INT_STATUS_VLV) {
1462 intel_prepare_page_flip(dev, pipe);
1463 intel_finish_page_flip(dev, pipe);
1466 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
1467 i9xx_pipe_crc_irq_handler(dev, pipe);
1470 /* Consume port. Then clear IIR or we'll miss events */
1471 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
1472 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
1473 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
1475 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1478 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
1480 if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)
1481 dp_aux_irq_handler(dev);
1483 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
1484 I915_READ(PORT_HOTPLUG_STAT);
1487 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
1488 gmbus_irq_handler(dev);
1491 gen6_rps_irq_handler(dev_priv, pm_iir);
1493 I915_WRITE(GTIIR, gt_iir);
1494 I915_WRITE(GEN6_PMIIR, pm_iir);
1495 I915_WRITE(VLV_IIR, iir);
1502 static void ibx_irq_handler(struct drm_device *dev, u32 pch_iir)
1504 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1506 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK;
1508 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_ibx);
1510 if (pch_iir & SDE_AUDIO_POWER_MASK) {
1511 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK) >>
1512 SDE_AUDIO_POWER_SHIFT);
1513 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1517 if (pch_iir & SDE_AUX_MASK)
1518 dp_aux_irq_handler(dev);
1520 if (pch_iir & SDE_GMBUS)
1521 gmbus_irq_handler(dev);
1523 if (pch_iir & SDE_AUDIO_HDCP_MASK)
1524 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1526 if (pch_iir & SDE_AUDIO_TRANS_MASK)
1527 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1529 if (pch_iir & SDE_POISON)
1530 DRM_ERROR("PCH poison interrupt\n");
1532 if (pch_iir & SDE_FDI_MASK)
1534 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1536 I915_READ(FDI_RX_IIR(pipe)));
1538 if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
1539 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1541 if (pch_iir & (SDE_TRANSB_CRC_ERR | SDE_TRANSA_CRC_ERR))
1542 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1544 if (pch_iir & SDE_TRANSA_FIFO_UNDER)
1545 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1547 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1549 if (pch_iir & SDE_TRANSB_FIFO_UNDER)
1550 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1552 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1555 static void ivb_err_int_handler(struct drm_device *dev)
1557 struct drm_i915_private *dev_priv = dev->dev_private;
1558 u32 err_int = I915_READ(GEN7_ERR_INT);
1559 enum i915_pipe pipe;
1561 if (err_int & ERR_INT_POISON)
1562 DRM_ERROR("Poison interrupt\n");
1564 for_each_pipe(pipe) {
1565 if (err_int & ERR_INT_FIFO_UNDERRUN(pipe)) {
1566 if (intel_set_cpu_fifo_underrun_reporting(dev, pipe,
1568 DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n",
1572 if (err_int & ERR_INT_PIPE_CRC_DONE(pipe)) {
1573 if (IS_IVYBRIDGE(dev))
1574 ivb_pipe_crc_irq_handler(dev, pipe);
1576 hsw_pipe_crc_irq_handler(dev, pipe);
1580 I915_WRITE(GEN7_ERR_INT, err_int);
1583 static void cpt_serr_int_handler(struct drm_device *dev)
1585 struct drm_i915_private *dev_priv = dev->dev_private;
1586 u32 serr_int = I915_READ(SERR_INT);
1588 if (serr_int & SERR_INT_POISON)
1589 DRM_ERROR("PCH poison interrupt\n");
1591 if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
1592 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A,
1594 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1596 if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
1597 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_B,
1599 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1601 if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
1602 if (intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_C,
1604 DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
1606 I915_WRITE(SERR_INT, serr_int);
1609 static void cpt_irq_handler(struct drm_device *dev, u32 pch_iir)
1611 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1613 u32 hotplug_trigger = pch_iir & SDE_HOTPLUG_MASK_CPT;
1615 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_cpt);
1617 if (pch_iir & SDE_AUDIO_POWER_MASK_CPT) {
1618 int port = ffs((pch_iir & SDE_AUDIO_POWER_MASK_CPT) >>
1619 SDE_AUDIO_POWER_SHIFT_CPT);
1620 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1624 if (pch_iir & SDE_AUX_MASK_CPT)
1625 dp_aux_irq_handler(dev);
1627 if (pch_iir & SDE_GMBUS_CPT)
1628 gmbus_irq_handler(dev);
1630 if (pch_iir & SDE_AUDIO_CP_REQ_CPT)
1631 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1633 if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
1634 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1636 if (pch_iir & SDE_FDI_MASK_CPT)
1638 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1640 I915_READ(FDI_RX_IIR(pipe)));
1642 if (pch_iir & SDE_ERROR_CPT)
1643 cpt_serr_int_handler(dev);
1646 static void ilk_display_irq_handler(struct drm_device *dev, u32 de_iir)
1648 struct drm_i915_private *dev_priv = dev->dev_private;
1649 enum i915_pipe pipe;
1651 if (de_iir & DE_AUX_CHANNEL_A)
1652 dp_aux_irq_handler(dev);
1654 if (de_iir & DE_GSE)
1655 intel_opregion_asle_intr(dev);
1657 if (de_iir & DE_POISON)
1658 DRM_ERROR("Poison interrupt\n");
1660 for_each_pipe(pipe) {
1661 if (de_iir & DE_PIPE_VBLANK(pipe))
1662 drm_handle_vblank(dev, pipe);
1664 if (de_iir & DE_PIPE_FIFO_UNDERRUN(pipe))
1665 if (intel_set_cpu_fifo_underrun_reporting(dev, pipe, false))
1666 DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n",
1669 if (de_iir & DE_PIPE_CRC_DONE(pipe))
1670 i9xx_pipe_crc_irq_handler(dev, pipe);
1672 /* plane/pipes map 1:1 on ilk+ */
1673 if (de_iir & DE_PLANE_FLIP_DONE(pipe)) {
1674 intel_prepare_page_flip(dev, pipe);
1675 intel_finish_page_flip_plane(dev, pipe);
1679 /* check event from PCH */
1680 if (de_iir & DE_PCH_EVENT) {
1681 u32 pch_iir = I915_READ(SDEIIR);
1683 if (HAS_PCH_CPT(dev))
1684 cpt_irq_handler(dev, pch_iir);
1686 ibx_irq_handler(dev, pch_iir);
1688 /* should clear PCH hotplug event before clear CPU irq */
1689 I915_WRITE(SDEIIR, pch_iir);
1692 if (IS_GEN5(dev) && de_iir & DE_PCU_EVENT)
1693 ironlake_rps_change_irq_handler(dev);
1696 static void ivb_display_irq_handler(struct drm_device *dev, u32 de_iir)
1698 struct drm_i915_private *dev_priv = dev->dev_private;
1701 if (de_iir & DE_ERR_INT_IVB)
1702 ivb_err_int_handler(dev);
1704 if (de_iir & DE_AUX_CHANNEL_A_IVB)
1705 dp_aux_irq_handler(dev);
1707 if (de_iir & DE_GSE_IVB)
1708 intel_opregion_asle_intr(dev);
1711 if (de_iir & (DE_PIPE_VBLANK_IVB(i)))
1712 drm_handle_vblank(dev, i);
1714 /* plane/pipes map 1:1 on ilk+ */
1715 if (de_iir & DE_PLANE_FLIP_DONE_IVB(i)) {
1716 intel_prepare_page_flip(dev, i);
1717 intel_finish_page_flip_plane(dev, i);
1721 /* check event from PCH */
1722 if (!HAS_PCH_NOP(dev) && (de_iir & DE_PCH_EVENT_IVB)) {
1723 u32 pch_iir = I915_READ(SDEIIR);
1725 cpt_irq_handler(dev, pch_iir);
1727 /* clear PCH hotplug event before clear CPU irq */
1728 I915_WRITE(SDEIIR, pch_iir);
1732 static irqreturn_t ironlake_irq_handler(void *arg)
1734 struct drm_device *dev = (struct drm_device *) arg;
1735 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
1736 u32 de_iir, gt_iir, de_ier, sde_ier = 0;
1738 atomic_inc(&dev_priv->irq_received);
1740 /* We get interrupts on unclaimed registers, so check for this before we
1741 * do any I915_{READ,WRITE}. */
1742 intel_uncore_check_errors(dev);
1744 /* disable master interrupt before clearing iir */
1745 de_ier = I915_READ(DEIER);
1746 I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
1747 POSTING_READ(DEIER);
1749 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1750 * interrupts will will be stored on its back queue, and then we'll be
1751 * able to process them after we restore SDEIER (as soon as we restore
1752 * it, we'll get an interrupt if SDEIIR still has something to process
1753 * due to its back queue). */
1754 if (!HAS_PCH_NOP(dev)) {
1755 sde_ier = I915_READ(SDEIER);
1756 I915_WRITE(SDEIER, 0);
1757 POSTING_READ(SDEIER);
1760 gt_iir = I915_READ(GTIIR);
1762 if (INTEL_INFO(dev)->gen >= 6)
1763 snb_gt_irq_handler(dev, dev_priv, gt_iir);
1765 ilk_gt_irq_handler(dev, dev_priv, gt_iir);
1766 I915_WRITE(GTIIR, gt_iir);
1769 de_iir = I915_READ(DEIIR);
1771 if (INTEL_INFO(dev)->gen >= 7)
1772 ivb_display_irq_handler(dev, de_iir);
1774 ilk_display_irq_handler(dev, de_iir);
1775 I915_WRITE(DEIIR, de_iir);
1778 if (INTEL_INFO(dev)->gen >= 6) {
1779 u32 pm_iir = I915_READ(GEN6_PMIIR);
1781 gen6_rps_irq_handler(dev_priv, pm_iir);
1782 I915_WRITE(GEN6_PMIIR, pm_iir);
1786 I915_WRITE(DEIER, de_ier);
1787 POSTING_READ(DEIER);
1788 if (!HAS_PCH_NOP(dev)) {
1789 I915_WRITE(SDEIER, sde_ier);
1790 POSTING_READ(SDEIER);
1795 static irqreturn_t gen8_irq_handler(void *arg)
1797 struct drm_device *dev = arg;
1798 struct drm_i915_private *dev_priv = dev->dev_private;
1801 enum i915_pipe pipe;
1803 atomic_inc(&dev_priv->irq_received);
1805 master_ctl = I915_READ(GEN8_MASTER_IRQ);
1806 master_ctl &= ~GEN8_MASTER_IRQ_CONTROL;
1810 I915_WRITE(GEN8_MASTER_IRQ, 0);
1811 POSTING_READ(GEN8_MASTER_IRQ);
1813 gen8_gt_irq_handler(dev, dev_priv, master_ctl);
1815 if (master_ctl & GEN8_DE_MISC_IRQ) {
1816 tmp = I915_READ(GEN8_DE_MISC_IIR);
1817 if (tmp & GEN8_DE_MISC_GSE)
1818 intel_opregion_asle_intr(dev);
1820 DRM_ERROR("Unexpected DE Misc interrupt\n");
1822 DRM_ERROR("The master control interrupt lied (DE MISC)!\n");
1825 I915_WRITE(GEN8_DE_MISC_IIR, tmp);
1829 if (master_ctl & GEN8_DE_PORT_IRQ) {
1830 tmp = I915_READ(GEN8_DE_PORT_IIR);
1831 if (tmp & GEN8_AUX_CHANNEL_A)
1832 dp_aux_irq_handler(dev);
1834 DRM_ERROR("Unexpected DE Port interrupt\n");
1836 DRM_ERROR("The master control interrupt lied (DE PORT)!\n");
1839 I915_WRITE(GEN8_DE_PORT_IIR, tmp);
1843 for_each_pipe(pipe) {
1846 if (!(master_ctl & GEN8_DE_PIPE_IRQ(pipe)))
1849 pipe_iir = I915_READ(GEN8_DE_PIPE_IIR(pipe));
1850 if (pipe_iir & GEN8_PIPE_VBLANK)
1851 drm_handle_vblank(dev, pipe);
1853 if (pipe_iir & GEN8_PIPE_FLIP_DONE) {
1854 intel_prepare_page_flip(dev, pipe);
1855 intel_finish_page_flip_plane(dev, pipe);
1858 if (pipe_iir & GEN8_PIPE_CDCLK_CRC_DONE)
1859 hsw_pipe_crc_irq_handler(dev, pipe);
1861 if (pipe_iir & GEN8_PIPE_FIFO_UNDERRUN) {
1862 if (intel_set_cpu_fifo_underrun_reporting(dev, pipe,
1864 DRM_DEBUG_DRIVER("Pipe %c FIFO underrun\n",
1868 if (pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS) {
1869 DRM_ERROR("Fault errors on pipe %c\n: 0x%08x",
1871 pipe_iir & GEN8_DE_PIPE_IRQ_FAULT_ERRORS);
1875 I915_WRITE(GEN8_DE_PIPE_IIR(pipe), pipe_iir);
1877 DRM_ERROR("The master control interrupt lied (DE PIPE)!\n");
1880 if (!HAS_PCH_NOP(dev) && master_ctl & GEN8_DE_PCH_IRQ) {
1882 * FIXME(BDW): Assume for now that the new interrupt handling
1883 * scheme also closed the SDE interrupt handling race we've seen
1884 * on older pch-split platforms. But this needs testing.
1886 u32 pch_iir = I915_READ(SDEIIR);
1888 cpt_irq_handler(dev, pch_iir);
1891 I915_WRITE(SDEIIR, pch_iir);
1895 I915_WRITE(GEN8_MASTER_IRQ, GEN8_MASTER_IRQ_CONTROL);
1896 POSTING_READ(GEN8_MASTER_IRQ);
1900 static void i915_error_wake_up(struct drm_i915_private *dev_priv,
1901 bool reset_completed)
1903 struct intel_ring_buffer *ring;
1907 * Notify all waiters for GPU completion events that reset state has
1908 * been changed, and that they need to restart their wait after
1909 * checking for potential errors (and bail out to drop locks if there is
1910 * a gpu reset pending so that i915_error_work_func can acquire them).
1913 /* Wake up __wait_seqno, potentially holding dev->struct_mutex. */
1914 for_each_ring(ring, dev_priv, i)
1915 wake_up_all(&ring->irq_queue);
1917 /* Wake up intel_crtc_wait_for_pending_flips, holding crtc->mutex. */
1918 wake_up_all(&dev_priv->pending_flip_queue);
1921 * Signal tasks blocked in i915_gem_wait_for_error that the pending
1922 * reset state is cleared.
1924 if (reset_completed)
1925 wake_up_all(&dev_priv->gpu_error.reset_queue);
1929 * i915_error_work_func - do process context error handling work
1930 * @work: work struct
1932 * Fire an error uevent so userspace can see that a hang or error
1935 static void i915_error_work_func(struct work_struct *work)
1937 struct i915_gpu_error *error = container_of(work, struct i915_gpu_error,
1939 drm_i915_private_t *dev_priv = container_of(error, drm_i915_private_t,
1941 struct drm_device *dev = dev_priv->dev;
1943 char *error_event[] = { I915_ERROR_UEVENT "=1", NULL };
1944 char *reset_event[] = { I915_RESET_UEVENT "=1", NULL };
1945 char *reset_done_event[] = { I915_ERROR_UEVENT "=0", NULL };
1949 /* kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, error_event); */
1952 * Note that there's only one work item which does gpu resets, so we
1953 * need not worry about concurrent gpu resets potentially incrementing
1954 * error->reset_counter twice. We only need to take care of another
1955 * racing irq/hangcheck declaring the gpu dead for a second time. A
1956 * quick check for that is good enough: schedule_work ensures the
1957 * correct ordering between hang detection and this work item, and since
1958 * the reset in-progress bit is only ever set by code outside of this
1959 * work we don't need to worry about any other races.
1961 if (i915_reset_in_progress(error) && !i915_terminally_wedged(error)) {
1962 DRM_DEBUG_DRIVER("resetting chip\n");
1964 kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE,
1969 * All state reset _must_ be completed before we update the
1970 * reset counter, for otherwise waiters might miss the reset
1971 * pending state and not properly drop locks, resulting in
1972 * deadlocks with the reset work.
1974 ret = i915_reset(dev);
1976 intel_display_handle_reset(dev);
1980 * After all the gem state is reset, increment the reset
1981 * counter and wake up everyone waiting for the reset to
1984 * Since unlock operations are a one-sided barrier only,
1985 * we need to insert a barrier here to order any seqno
1987 * the counter increment.
1990 atomic_inc(&dev_priv->gpu_error.reset_counter);
1993 kobject_uevent_env(&dev->primary->kdev->kobj,
1994 KOBJ_CHANGE, reset_done_event);
1997 atomic_set_mask(I915_WEDGED, &error->reset_counter);
2001 * Note: The wake_up also serves as a memory barrier so that
2002 * waiters see the update value of the reset counter atomic_t.
2004 i915_error_wake_up(dev_priv, true);
2008 static void i915_report_and_clear_eir(struct drm_device *dev)
2010 struct drm_i915_private *dev_priv = dev->dev_private;
2011 uint32_t instdone[I915_NUM_INSTDONE_REG];
2012 u32 eir = I915_READ(EIR);
2018 pr_err("render error detected, EIR: 0x%08x\n", eir);
2021 i915_get_extra_instdone(dev, instdone);
2025 if (eir & (GM45_ERROR_MEM_PRIV | GM45_ERROR_CP_PRIV)) {
2026 u32 ipeir = I915_READ(IPEIR_I965);
2028 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2029 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2030 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2031 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2032 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2033 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2034 I915_WRITE(IPEIR_I965, ipeir);
2035 POSTING_READ(IPEIR_I965);
2037 if (eir & GM45_ERROR_PAGE_TABLE) {
2038 u32 pgtbl_err = I915_READ(PGTBL_ER);
2039 pr_err("page table error\n");
2040 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2041 I915_WRITE(PGTBL_ER, pgtbl_err);
2042 POSTING_READ(PGTBL_ER);
2046 if (!IS_GEN2(dev)) {
2047 if (eir & I915_ERROR_PAGE_TABLE) {
2048 u32 pgtbl_err = I915_READ(PGTBL_ER);
2049 pr_err("page table error\n");
2050 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err);
2051 I915_WRITE(PGTBL_ER, pgtbl_err);
2052 POSTING_READ(PGTBL_ER);
2056 if (eir & I915_ERROR_MEMORY_REFRESH) {
2057 pr_err("memory refresh error:\n");
2059 pr_err("pipe %c stat: 0x%08x\n",
2060 pipe_name(pipe), I915_READ(PIPESTAT(pipe)));
2061 /* pipestat has already been acked */
2063 if (eir & I915_ERROR_INSTRUCTION) {
2064 pr_err("instruction error\n");
2065 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM));
2066 for (i = 0; i < ARRAY_SIZE(instdone); i++)
2067 pr_err(" INSTDONE_%d: 0x%08x\n", i, instdone[i]);
2068 if (INTEL_INFO(dev)->gen < 4) {
2069 u32 ipeir = I915_READ(IPEIR);
2071 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR));
2072 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR));
2073 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD));
2074 I915_WRITE(IPEIR, ipeir);
2075 POSTING_READ(IPEIR);
2077 u32 ipeir = I915_READ(IPEIR_I965);
2079 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965));
2080 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965));
2081 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS));
2082 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965));
2083 I915_WRITE(IPEIR_I965, ipeir);
2084 POSTING_READ(IPEIR_I965);
2088 I915_WRITE(EIR, eir);
2090 eir = I915_READ(EIR);
2093 * some errors might have become stuck,
2096 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir);
2097 I915_WRITE(EMR, I915_READ(EMR) | eir);
2098 I915_WRITE(IIR, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
2103 * i915_handle_error - handle an error interrupt
2106 * Do some basic checking of regsiter state at error interrupt time and
2107 * dump it to the syslog. Also call i915_capture_error_state() to make
2108 * sure we get a record and make it available in debugfs. Fire a uevent
2109 * so userspace knows something bad happened (should trigger collection
2110 * of a ring dump etc.).
2112 void i915_handle_error(struct drm_device *dev, bool wedged)
2114 struct drm_i915_private *dev_priv = dev->dev_private;
2117 i915_capture_error_state(dev);
2119 i915_report_and_clear_eir(dev);
2122 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG,
2123 &dev_priv->gpu_error.reset_counter);
2126 * Wakeup waiting processes so that the reset work function
2127 * i915_error_work_func doesn't deadlock trying to grab various
2128 * locks. By bumping the reset counter first, the woken
2129 * processes will see a reset in progress and back off,
2130 * releasing their locks and then wait for the reset completion.
2131 * We must do this for _all_ gpu waiters that might hold locks
2132 * that the reset work needs to acquire.
2134 * Note: The wake_up serves as the required memory barrier to
2135 * ensure that the waiters see the updated value of the reset
2138 i915_error_wake_up(dev_priv, false);
2142 * Our reset work can grab modeset locks (since it needs to reset the
2143 * state of outstanding pagelips). Hence it must not be run on our own
2144 * dev-priv->wq work queue for otherwise the flush_work in the pageflip
2145 * code will deadlock.
2147 schedule_work(&dev_priv->gpu_error.work);
2150 static void __always_unused i915_pageflip_stall_check(struct drm_device *dev, int pipe)
2152 drm_i915_private_t *dev_priv = dev->dev_private;
2153 struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
2154 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2155 struct drm_i915_gem_object *obj;
2156 struct intel_unpin_work *work;
2157 bool stall_detected;
2159 /* Ignore early vblank irqs */
2160 if (intel_crtc == NULL)
2163 lockmgr(&dev->event_lock, LK_EXCLUSIVE);
2164 work = intel_crtc->unpin_work;
2167 atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE ||
2168 !work->enable_stall_check) {
2169 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
2170 lockmgr(&dev->event_lock, LK_RELEASE);
2174 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
2175 obj = work->pending_flip_obj;
2176 if (INTEL_INFO(dev)->gen >= 4) {
2177 int dspsurf = DSPSURF(intel_crtc->plane);
2178 stall_detected = I915_HI_DISPBASE(I915_READ(dspsurf)) ==
2179 i915_gem_obj_ggtt_offset(obj);
2181 int dspaddr = DSPADDR(intel_crtc->plane);
2182 stall_detected = I915_READ(dspaddr) == (i915_gem_obj_ggtt_offset(obj) +
2183 crtc->y * crtc->fb->pitches[0] +
2184 crtc->x * crtc->fb->bits_per_pixel/8);
2187 lockmgr(&dev->event_lock, LK_RELEASE);
2189 if (stall_detected) {
2190 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
2191 intel_prepare_page_flip(dev, intel_crtc->plane);
2195 /* Called from drm generic code, passed 'crtc' which
2196 * we use as a pipe index
2198 static int i915_enable_vblank(struct drm_device *dev, int pipe)
2200 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2202 if (!i915_pipe_enabled(dev, pipe))
2205 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2206 if (INTEL_INFO(dev)->gen >= 4)
2207 i915_enable_pipestat(dev_priv, pipe,
2208 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2210 i915_enable_pipestat(dev_priv, pipe,
2211 PIPE_VBLANK_INTERRUPT_ENABLE);
2213 /* maintain vblank delivery even in deep C-states */
2214 if (dev_priv->info->gen == 3)
2215 I915_WRITE(INSTPM, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS));
2216 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2221 static int ironlake_enable_vblank(struct drm_device *dev, int pipe)
2223 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2224 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2225 DE_PIPE_VBLANK(pipe);
2227 if (!i915_pipe_enabled(dev, pipe))
2230 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2231 ironlake_enable_display_irq(dev_priv, bit);
2232 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2237 static int valleyview_enable_vblank(struct drm_device *dev, int pipe)
2239 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2242 if (!i915_pipe_enabled(dev, pipe))
2245 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2246 imr = I915_READ(VLV_IMR);
2248 imr &= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2250 imr &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2251 I915_WRITE(VLV_IMR, imr);
2252 i915_enable_pipestat(dev_priv, pipe,
2253 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2254 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2259 static int gen8_enable_vblank(struct drm_device *dev, int pipe)
2261 struct drm_i915_private *dev_priv = dev->dev_private;
2263 if (!i915_pipe_enabled(dev, pipe))
2266 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2267 dev_priv->de_irq_mask[pipe] &= ~GEN8_PIPE_VBLANK;
2268 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2269 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2270 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2274 /* Called from drm generic code, passed 'crtc' which
2275 * we use as a pipe index
2277 static void i915_disable_vblank(struct drm_device *dev, int pipe)
2279 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2281 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2282 if (dev_priv->info->gen == 3)
2283 I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS));
2285 i915_disable_pipestat(dev_priv, pipe,
2286 PIPE_VBLANK_INTERRUPT_ENABLE |
2287 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2288 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2291 static void ironlake_disable_vblank(struct drm_device *dev, int pipe)
2293 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2294 uint32_t bit = (INTEL_INFO(dev)->gen >= 7) ? DE_PIPE_VBLANK_IVB(pipe) :
2295 DE_PIPE_VBLANK(pipe);
2297 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2298 ironlake_disable_display_irq(dev_priv, bit);
2299 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2302 static void valleyview_disable_vblank(struct drm_device *dev, int pipe)
2304 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2307 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2308 i915_disable_pipestat(dev_priv, pipe,
2309 PIPE_START_VBLANK_INTERRUPT_ENABLE);
2310 imr = I915_READ(VLV_IMR);
2312 imr |= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT;
2314 imr |= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2315 I915_WRITE(VLV_IMR, imr);
2316 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2319 static void gen8_disable_vblank(struct drm_device *dev, int pipe)
2321 struct drm_i915_private *dev_priv = dev->dev_private;
2323 if (!i915_pipe_enabled(dev, pipe))
2326 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2327 dev_priv->de_irq_mask[pipe] |= GEN8_PIPE_VBLANK;
2328 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2329 POSTING_READ(GEN8_DE_PIPE_IMR(pipe));
2330 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2334 ring_last_seqno(struct intel_ring_buffer *ring)
2336 return list_entry(ring->request_list.prev,
2337 struct drm_i915_gem_request, list)->seqno;
2341 ring_idle(struct intel_ring_buffer *ring, u32 seqno)
2343 return (list_empty(&ring->request_list) ||
2344 i915_seqno_passed(seqno, ring_last_seqno(ring)));
2347 static struct intel_ring_buffer *
2348 semaphore_waits_for(struct intel_ring_buffer *ring, u32 *seqno)
2350 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2351 u32 cmd, ipehr, acthd, acthd_min;
2353 ipehr = I915_READ(RING_IPEHR(ring->mmio_base));
2354 if ((ipehr & ~(0x3 << 16)) !=
2355 (MI_SEMAPHORE_MBOX | MI_SEMAPHORE_COMPARE | MI_SEMAPHORE_REGISTER))
2358 /* ACTHD is likely pointing to the dword after the actual command,
2359 * so scan backwards until we find the MBOX.
2361 acthd = intel_ring_get_active_head(ring) & HEAD_ADDR;
2362 acthd_min = max((int)acthd - 3 * 4, 0);
2364 cmd = ioread32(ring->virtual_start + acthd);
2369 if (acthd < acthd_min)
2373 *seqno = ioread32(ring->virtual_start+acthd+4)+1;
2374 return &dev_priv->ring[(ring->id + (((ipehr >> 17) & 1) + 1)) % 3];
2377 static int semaphore_passed(struct intel_ring_buffer *ring)
2379 struct drm_i915_private *dev_priv = ring->dev->dev_private;
2380 struct intel_ring_buffer *signaller;
2383 ring->hangcheck.deadlock = true;
2385 signaller = semaphore_waits_for(ring, &seqno);
2386 if (signaller == NULL || signaller->hangcheck.deadlock)
2389 /* cursory check for an unkickable deadlock */
2390 ctl = I915_READ_CTL(signaller);
2391 if (ctl & RING_WAIT_SEMAPHORE && semaphore_passed(signaller) < 0)
2394 return i915_seqno_passed(signaller->get_seqno(signaller, false), seqno);
2397 static void semaphore_clear_deadlocks(struct drm_i915_private *dev_priv)
2399 struct intel_ring_buffer *ring;
2402 for_each_ring(ring, dev_priv, i)
2403 ring->hangcheck.deadlock = false;
2406 static enum intel_ring_hangcheck_action
2407 ring_stuck(struct intel_ring_buffer *ring, u32 acthd)
2409 struct drm_device *dev = ring->dev;
2410 struct drm_i915_private *dev_priv = dev->dev_private;
2413 if (ring->hangcheck.acthd != acthd)
2414 return HANGCHECK_ACTIVE;
2417 return HANGCHECK_HUNG;
2419 /* Is the chip hanging on a WAIT_FOR_EVENT?
2420 * If so we can simply poke the RB_WAIT bit
2421 * and break the hang. This should work on
2422 * all but the second generation chipsets.
2424 tmp = I915_READ_CTL(ring);
2425 if (tmp & RING_WAIT) {
2426 DRM_ERROR("Kicking stuck wait on %s\n",
2428 i915_handle_error(dev, false);
2429 I915_WRITE_CTL(ring, tmp);
2430 return HANGCHECK_KICK;
2433 if (INTEL_INFO(dev)->gen >= 6 && tmp & RING_WAIT_SEMAPHORE) {
2434 switch (semaphore_passed(ring)) {
2436 return HANGCHECK_HUNG;
2438 DRM_ERROR("Kicking stuck semaphore on %s\n",
2440 i915_handle_error(dev, false);
2441 I915_WRITE_CTL(ring, tmp);
2442 return HANGCHECK_KICK;
2444 return HANGCHECK_WAIT;
2448 return HANGCHECK_HUNG;
2452 * This is called when the chip hasn't reported back with completed
2453 * batchbuffers in a long time. We keep track per ring seqno progress and
2454 * if there are no progress, hangcheck score for that ring is increased.
2455 * Further, acthd is inspected to see if the ring is stuck. On stuck case
2456 * we kick the ring. If we see no progress on three subsequent calls
2457 * we assume chip is wedged and try to fix it by resetting the chip.
2459 static void i915_hangcheck_elapsed(unsigned long data)
2461 struct drm_device *dev = (struct drm_device *)data;
2462 drm_i915_private_t *dev_priv = dev->dev_private;
2463 struct intel_ring_buffer *ring;
2465 int busy_count = 0, rings_hung = 0;
2466 bool stuck[I915_NUM_RINGS] = { 0 };
2472 if (!i915_enable_hangcheck)
2475 for_each_ring(ring, dev_priv, i) {
2479 semaphore_clear_deadlocks(dev_priv);
2481 seqno = ring->get_seqno(ring, false);
2482 acthd = intel_ring_get_active_head(ring);
2484 if (ring->hangcheck.seqno == seqno) {
2485 if (ring_idle(ring, seqno)) {
2486 ring->hangcheck.action = HANGCHECK_IDLE;
2488 if (waitqueue_active(&ring->irq_queue)) {
2489 /* Issue a wake-up to catch stuck h/w. */
2490 if (!test_and_set_bit(ring->id, &dev_priv->gpu_error.missed_irq_rings)) {
2491 if (!(dev_priv->gpu_error.test_irq_rings & intel_ring_flag(ring)))
2492 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
2495 DRM_INFO("Fake missed irq on %s\n",
2497 wake_up_all(&ring->irq_queue);
2499 /* Safeguard against driver failure */
2500 ring->hangcheck.score += BUSY;
2504 /* We always increment the hangcheck score
2505 * if the ring is busy and still processing
2506 * the same request, so that no single request
2507 * can run indefinitely (such as a chain of
2508 * batches). The only time we do not increment
2509 * the hangcheck score on this ring, if this
2510 * ring is in a legitimate wait for another
2511 * ring. In that case the waiting ring is a
2512 * victim and we want to be sure we catch the
2513 * right culprit. Then every time we do kick
2514 * the ring, add a small increment to the
2515 * score so that we can catch a batch that is
2516 * being repeatedly kicked and so responsible
2517 * for stalling the machine.
2519 ring->hangcheck.action = ring_stuck(ring,
2522 switch (ring->hangcheck.action) {
2523 case HANGCHECK_IDLE:
2524 case HANGCHECK_WAIT:
2526 case HANGCHECK_ACTIVE:
2527 ring->hangcheck.score += BUSY;
2529 case HANGCHECK_KICK:
2530 ring->hangcheck.score += KICK;
2532 case HANGCHECK_HUNG:
2533 ring->hangcheck.score += HUNG;
2539 ring->hangcheck.action = HANGCHECK_ACTIVE;
2541 /* Gradually reduce the count so that we catch DoS
2542 * attempts across multiple batches.
2544 if (ring->hangcheck.score > 0)
2545 ring->hangcheck.score--;
2548 ring->hangcheck.seqno = seqno;
2549 ring->hangcheck.acthd = acthd;
2553 for_each_ring(ring, dev_priv, i) {
2554 if (ring->hangcheck.score > FIRE) {
2555 DRM_INFO("%s on %s\n",
2556 stuck[i] ? "stuck" : "no progress",
2563 return i915_handle_error(dev, true);
2566 /* Reset timer case chip hangs without another request
2568 i915_queue_hangcheck(dev);
2571 void i915_queue_hangcheck(struct drm_device *dev)
2573 struct drm_i915_private *dev_priv = dev->dev_private;
2574 if (!i915_enable_hangcheck)
2577 mod_timer(&dev_priv->gpu_error.hangcheck_timer,
2578 round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
2581 static void ibx_irq_preinstall(struct drm_device *dev)
2583 struct drm_i915_private *dev_priv = dev->dev_private;
2585 if (HAS_PCH_NOP(dev))
2588 /* south display irq */
2589 I915_WRITE(SDEIMR, 0xffffffff);
2591 * SDEIER is also touched by the interrupt handler to work around missed
2592 * PCH interrupts. Hence we can't update it after the interrupt handler
2593 * is enabled - instead we unconditionally enable all PCH interrupt
2594 * sources here, but then only unmask them as needed with SDEIMR.
2596 I915_WRITE(SDEIER, 0xffffffff);
2597 POSTING_READ(SDEIER);
2600 static void gen5_gt_irq_preinstall(struct drm_device *dev)
2602 struct drm_i915_private *dev_priv = dev->dev_private;
2605 I915_WRITE(GTIMR, 0xffffffff);
2606 I915_WRITE(GTIER, 0x0);
2607 POSTING_READ(GTIER);
2609 if (INTEL_INFO(dev)->gen >= 6) {
2611 I915_WRITE(GEN6_PMIMR, 0xffffffff);
2612 I915_WRITE(GEN6_PMIER, 0x0);
2613 POSTING_READ(GEN6_PMIER);
2619 static void ironlake_irq_preinstall(struct drm_device *dev)
2621 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2623 atomic_set(&dev_priv->irq_received, 0);
2625 I915_WRITE(HWSTAM, 0xeffe);
2627 I915_WRITE(DEIMR, 0xffffffff);
2628 I915_WRITE(DEIER, 0x0);
2629 POSTING_READ(DEIER);
2631 gen5_gt_irq_preinstall(dev);
2633 ibx_irq_preinstall(dev);
2636 static void valleyview_irq_preinstall(struct drm_device *dev)
2638 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2641 atomic_set(&dev_priv->irq_received, 0);
2644 I915_WRITE(VLV_IMR, 0);
2645 I915_WRITE(RING_IMR(RENDER_RING_BASE), 0);
2646 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE), 0);
2647 I915_WRITE(RING_IMR(BLT_RING_BASE), 0);
2650 I915_WRITE(GTIIR, I915_READ(GTIIR));
2651 I915_WRITE(GTIIR, I915_READ(GTIIR));
2653 gen5_gt_irq_preinstall(dev);
2655 I915_WRITE(DPINVGTT, 0xff);
2657 I915_WRITE(PORT_HOTPLUG_EN, 0);
2658 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
2660 I915_WRITE(PIPESTAT(pipe), 0xffff);
2661 I915_WRITE(VLV_IIR, 0xffffffff);
2662 I915_WRITE(VLV_IMR, 0xffffffff);
2663 I915_WRITE(VLV_IER, 0x0);
2664 POSTING_READ(VLV_IER);
2667 static void gen8_irq_preinstall(struct drm_device *dev)
2669 struct drm_i915_private *dev_priv = dev->dev_private;
2672 atomic_set(&dev_priv->irq_received, 0);
2674 I915_WRITE(GEN8_MASTER_IRQ, 0);
2675 POSTING_READ(GEN8_MASTER_IRQ);
2677 /* IIR can theoretically queue up two events. Be paranoid */
2678 #define GEN8_IRQ_INIT_NDX(type, which) do { \
2679 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
2680 POSTING_READ(GEN8_##type##_IMR(which)); \
2681 I915_WRITE(GEN8_##type##_IER(which), 0); \
2682 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
2683 POSTING_READ(GEN8_##type##_IIR(which)); \
2684 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
2687 #define GEN8_IRQ_INIT(type) do { \
2688 I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \
2689 POSTING_READ(GEN8_##type##_IMR); \
2690 I915_WRITE(GEN8_##type##_IER, 0); \
2691 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
2692 POSTING_READ(GEN8_##type##_IIR); \
2693 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
2696 GEN8_IRQ_INIT_NDX(GT, 0);
2697 GEN8_IRQ_INIT_NDX(GT, 1);
2698 GEN8_IRQ_INIT_NDX(GT, 2);
2699 GEN8_IRQ_INIT_NDX(GT, 3);
2701 for_each_pipe(pipe) {
2702 GEN8_IRQ_INIT_NDX(DE_PIPE, pipe);
2705 GEN8_IRQ_INIT(DE_PORT);
2706 GEN8_IRQ_INIT(DE_MISC);
2708 #undef GEN8_IRQ_INIT
2709 #undef GEN8_IRQ_INIT_NDX
2711 POSTING_READ(GEN8_PCU_IIR);
2713 ibx_irq_preinstall(dev);
2716 static void ibx_hpd_irq_setup(struct drm_device *dev)
2718 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2719 struct drm_mode_config *mode_config = &dev->mode_config;
2720 struct intel_encoder *intel_encoder;
2721 u32 hotplug_irqs, hotplug, enabled_irqs = 0;
2723 if (HAS_PCH_IBX(dev)) {
2724 hotplug_irqs = SDE_HOTPLUG_MASK;
2725 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2726 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2727 enabled_irqs |= hpd_ibx[intel_encoder->hpd_pin];
2729 hotplug_irqs = SDE_HOTPLUG_MASK_CPT;
2730 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
2731 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
2732 enabled_irqs |= hpd_cpt[intel_encoder->hpd_pin];
2735 ibx_display_interrupt_update(dev_priv, hotplug_irqs, enabled_irqs);
2738 * Enable digital hotplug on the PCH, and configure the DP short pulse
2739 * duration to 2ms (which is the minimum in the Display Port spec)
2741 * This register is the same on all known PCH chips.
2743 hotplug = I915_READ(PCH_PORT_HOTPLUG);
2744 hotplug &= ~(PORTD_PULSE_DURATION_MASK|PORTC_PULSE_DURATION_MASK|PORTB_PULSE_DURATION_MASK);
2745 hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;
2746 hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;
2747 hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;
2748 I915_WRITE(PCH_PORT_HOTPLUG, hotplug);
2751 static void ibx_irq_postinstall(struct drm_device *dev)
2753 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2756 if (HAS_PCH_NOP(dev))
2759 if (HAS_PCH_IBX(dev)) {
2760 mask = SDE_GMBUS | SDE_AUX_MASK | SDE_POISON;
2762 mask = SDE_GMBUS_CPT | SDE_AUX_MASK_CPT;
2764 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
2767 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
2768 I915_WRITE(SDEIMR, ~mask);
2771 static void gen5_gt_irq_postinstall(struct drm_device *dev)
2773 struct drm_i915_private *dev_priv = dev->dev_private;
2774 u32 pm_irqs, gt_irqs;
2776 pm_irqs = gt_irqs = 0;
2778 dev_priv->gt_irq_mask = ~0;
2779 if (HAS_L3_DPF(dev)) {
2780 /* L3 parity interrupt is always unmasked. */
2781 dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev);
2782 gt_irqs |= GT_PARITY_ERROR(dev);
2785 gt_irqs |= GT_RENDER_USER_INTERRUPT;
2787 gt_irqs |= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT |
2788 ILK_BSD_USER_INTERRUPT;
2790 gt_irqs |= GT_BLT_USER_INTERRUPT | GT_BSD_USER_INTERRUPT;
2793 I915_WRITE(GTIIR, I915_READ(GTIIR));
2794 I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
2795 I915_WRITE(GTIER, gt_irqs);
2796 POSTING_READ(GTIER);
2798 if (INTEL_INFO(dev)->gen >= 6) {
2799 pm_irqs |= GEN6_PM_RPS_EVENTS;
2802 pm_irqs |= PM_VEBOX_USER_INTERRUPT;
2804 dev_priv->pm_irq_mask = 0xffffffff;
2805 I915_WRITE(GEN6_PMIIR, I915_READ(GEN6_PMIIR));
2806 I915_WRITE(GEN6_PMIMR, dev_priv->pm_irq_mask);
2807 I915_WRITE(GEN6_PMIER, pm_irqs);
2808 POSTING_READ(GEN6_PMIER);
2812 static int ironlake_irq_postinstall(struct drm_device *dev)
2814 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2815 u32 display_mask, extra_mask;
2817 if (INTEL_INFO(dev)->gen >= 7) {
2818 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE_IVB |
2819 DE_PCH_EVENT_IVB | DE_PLANEC_FLIP_DONE_IVB |
2820 DE_PLANEB_FLIP_DONE_IVB |
2821 DE_PLANEA_FLIP_DONE_IVB | DE_AUX_CHANNEL_A_IVB);
2822 extra_mask = (DE_PIPEC_VBLANK_IVB | DE_PIPEB_VBLANK_IVB |
2823 DE_PIPEA_VBLANK_IVB | DE_ERR_INT_IVB);
2825 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
2827 display_mask = (DE_MASTER_IRQ_CONTROL | DE_GSE | DE_PCH_EVENT |
2828 DE_PLANEA_FLIP_DONE | DE_PLANEB_FLIP_DONE |
2830 DE_PIPEB_CRC_DONE | DE_PIPEA_CRC_DONE |
2832 extra_mask = DE_PIPEA_VBLANK | DE_PIPEB_VBLANK | DE_PCU_EVENT |
2833 DE_PIPEB_FIFO_UNDERRUN | DE_PIPEA_FIFO_UNDERRUN;
2836 dev_priv->irq_mask = ~display_mask;
2838 /* should always can generate irq */
2839 I915_WRITE(DEIIR, I915_READ(DEIIR));
2840 I915_WRITE(DEIMR, dev_priv->irq_mask);
2841 I915_WRITE(DEIER, display_mask | extra_mask);
2842 POSTING_READ(DEIER);
2844 gen5_gt_irq_postinstall(dev);
2846 ibx_irq_postinstall(dev);
2848 if (IS_IRONLAKE_M(dev)) {
2849 /* Enable PCU event interrupts
2851 * spinlocking not required here for correctness since interrupt
2852 * setup is guaranteed to run in single-threaded context. But we
2853 * need it to make the assert_spin_locked happy. */
2854 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2855 ironlake_enable_display_irq(dev_priv, DE_PCU_EVENT);
2856 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2862 static int valleyview_irq_postinstall(struct drm_device *dev)
2864 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
2866 u32 pipestat_enable = PLANE_FLIP_DONE_INT_EN_VLV |
2867 PIPE_CRC_DONE_ENABLE;
2869 enable_mask = I915_DISPLAY_PORT_INTERRUPT;
2870 enable_mask |= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
2871 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2872 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
2873 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2876 *Leave vblank interrupts masked initially. enable/disable will
2877 * toggle them based on usage.
2879 dev_priv->irq_mask = (~enable_mask) |
2880 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT |
2881 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
2883 I915_WRITE(PORT_HOTPLUG_EN, 0);
2884 POSTING_READ(PORT_HOTPLUG_EN);
2886 I915_WRITE(VLV_IMR, dev_priv->irq_mask);
2887 I915_WRITE(VLV_IER, enable_mask);
2888 I915_WRITE(VLV_IIR, 0xffffffff);
2889 I915_WRITE(PIPESTAT(0), 0xffff);
2890 I915_WRITE(PIPESTAT(1), 0xffff);
2891 POSTING_READ(VLV_IER);
2893 /* Interrupt setup is already guaranteed to be single-threaded, this is
2894 * just to make the assert_spin_locked check happy. */
2895 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
2896 i915_enable_pipestat(dev_priv, PIPE_A, pipestat_enable);
2897 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_EVENT_ENABLE);
2898 i915_enable_pipestat(dev_priv, PIPE_B, pipestat_enable);
2899 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
2901 I915_WRITE(VLV_IIR, 0xffffffff);
2902 I915_WRITE(VLV_IIR, 0xffffffff);
2904 gen5_gt_irq_postinstall(dev);
2906 /* ack & enable invalid PTE error interrupts */
2907 #if 0 /* FIXME: add support to irq handler for checking these bits */
2908 I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK);
2909 I915_WRITE(DPINVGTT, DPINVGTT_EN_MASK);
2912 I915_WRITE(VLV_MASTER_IER, MASTER_INTERRUPT_ENABLE);
2917 static void gen8_gt_irq_postinstall(struct drm_i915_private *dev_priv)
2921 /* These are interrupts we'll toggle with the ring mask register */
2922 uint32_t gt_interrupts[] = {
2923 GT_RENDER_USER_INTERRUPT << GEN8_RCS_IRQ_SHIFT |
2924 GT_RENDER_L3_PARITY_ERROR_INTERRUPT |
2925 GT_RENDER_USER_INTERRUPT << GEN8_BCS_IRQ_SHIFT,
2926 GT_RENDER_USER_INTERRUPT << GEN8_VCS1_IRQ_SHIFT |
2927 GT_RENDER_USER_INTERRUPT << GEN8_VCS2_IRQ_SHIFT,
2929 GT_RENDER_USER_INTERRUPT << GEN8_VECS_IRQ_SHIFT
2932 for (i = 0; i < ARRAY_SIZE(gt_interrupts); i++) {
2933 u32 tmp = I915_READ(GEN8_GT_IIR(i));
2935 DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n",
2937 I915_WRITE(GEN8_GT_IMR(i), ~gt_interrupts[i]);
2938 I915_WRITE(GEN8_GT_IER(i), gt_interrupts[i]);
2940 POSTING_READ(GEN8_GT_IER(0));
2943 static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
2945 struct drm_device *dev = dev_priv->dev;
2946 uint32_t de_pipe_masked = GEN8_PIPE_FLIP_DONE |
2947 GEN8_PIPE_CDCLK_CRC_DONE |
2948 GEN8_DE_PIPE_IRQ_FAULT_ERRORS;
2949 uint32_t de_pipe_enables = de_pipe_masked | GEN8_PIPE_VBLANK |
2950 GEN8_PIPE_FIFO_UNDERRUN;
2952 dev_priv->de_irq_mask[PIPE_A] = ~de_pipe_masked;
2953 dev_priv->de_irq_mask[PIPE_B] = ~de_pipe_masked;
2954 dev_priv->de_irq_mask[PIPE_C] = ~de_pipe_masked;
2956 for_each_pipe(pipe) {
2957 u32 tmp = I915_READ(GEN8_DE_PIPE_IIR(pipe));
2959 DRM_ERROR("Interrupt (%d) should have been masked in pre-install 0x%08x\n",
2961 I915_WRITE(GEN8_DE_PIPE_IMR(pipe), dev_priv->de_irq_mask[pipe]);
2962 I915_WRITE(GEN8_DE_PIPE_IER(pipe), de_pipe_enables);
2964 POSTING_READ(GEN8_DE_PIPE_ISR(0));
2966 I915_WRITE(GEN8_DE_PORT_IMR, ~GEN8_AUX_CHANNEL_A);
2967 I915_WRITE(GEN8_DE_PORT_IER, GEN8_AUX_CHANNEL_A);
2968 POSTING_READ(GEN8_DE_PORT_IER);
2971 static int gen8_irq_postinstall(struct drm_device *dev)
2973 struct drm_i915_private *dev_priv = dev->dev_private;
2975 gen8_gt_irq_postinstall(dev_priv);
2976 gen8_de_irq_postinstall(dev_priv);
2978 ibx_irq_postinstall(dev);
2980 I915_WRITE(GEN8_MASTER_IRQ, DE_MASTER_IRQ_CONTROL);
2981 POSTING_READ(GEN8_MASTER_IRQ);
2986 static void gen8_irq_uninstall(struct drm_device *dev)
2988 struct drm_i915_private *dev_priv = dev->dev_private;
2994 atomic_set(&dev_priv->irq_received, 0);
2996 I915_WRITE(GEN8_MASTER_IRQ, 0);
2998 #define GEN8_IRQ_FINI_NDX(type, which) do { \
2999 I915_WRITE(GEN8_##type##_IMR(which), 0xffffffff); \
3000 I915_WRITE(GEN8_##type##_IER(which), 0); \
3001 I915_WRITE(GEN8_##type##_IIR(which), 0xffffffff); \
3004 #define GEN8_IRQ_FINI(type) do { \
3005 I915_WRITE(GEN8_##type##_IMR, 0xffffffff); \
3006 I915_WRITE(GEN8_##type##_IER, 0); \
3007 I915_WRITE(GEN8_##type##_IIR, 0xffffffff); \
3010 GEN8_IRQ_FINI_NDX(GT, 0);
3011 GEN8_IRQ_FINI_NDX(GT, 1);
3012 GEN8_IRQ_FINI_NDX(GT, 2);
3013 GEN8_IRQ_FINI_NDX(GT, 3);
3015 for_each_pipe(pipe) {
3016 GEN8_IRQ_FINI_NDX(DE_PIPE, pipe);
3019 GEN8_IRQ_FINI(DE_PORT);
3020 GEN8_IRQ_FINI(DE_MISC);
3022 #undef GEN8_IRQ_FINI
3023 #undef GEN8_IRQ_FINI_NDX
3025 POSTING_READ(GEN8_PCU_IIR);
3028 static void valleyview_irq_uninstall(struct drm_device *dev)
3030 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3036 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3039 I915_WRITE(PIPESTAT(pipe), 0xffff);
3041 I915_WRITE(HWSTAM, 0xffffffff);
3042 I915_WRITE(PORT_HOTPLUG_EN, 0);
3043 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3045 I915_WRITE(PIPESTAT(pipe), 0xffff);
3046 I915_WRITE(VLV_IIR, 0xffffffff);
3047 I915_WRITE(VLV_IMR, 0xffffffff);
3048 I915_WRITE(VLV_IER, 0x0);
3049 POSTING_READ(VLV_IER);
3052 static void ironlake_irq_uninstall(struct drm_device *dev)
3054 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3059 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3061 I915_WRITE(HWSTAM, 0xffffffff);
3063 I915_WRITE(DEIMR, 0xffffffff);
3064 I915_WRITE(DEIER, 0x0);
3065 I915_WRITE(DEIIR, I915_READ(DEIIR));
3067 I915_WRITE(GEN7_ERR_INT, I915_READ(GEN7_ERR_INT));
3069 I915_WRITE(GTIMR, 0xffffffff);
3070 I915_WRITE(GTIER, 0x0);
3071 I915_WRITE(GTIIR, I915_READ(GTIIR));
3073 if (HAS_PCH_NOP(dev))
3076 I915_WRITE(SDEIMR, 0xffffffff);
3077 I915_WRITE(SDEIER, 0x0);
3078 I915_WRITE(SDEIIR, I915_READ(SDEIIR));
3079 if (HAS_PCH_CPT(dev) || HAS_PCH_LPT(dev))
3080 I915_WRITE(SERR_INT, I915_READ(SERR_INT));
3083 static void i8xx_irq_preinstall(struct drm_device * dev)
3085 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3088 atomic_set(&dev_priv->irq_received, 0);
3091 I915_WRITE(PIPESTAT(pipe), 0);
3092 I915_WRITE16(IMR, 0xffff);
3093 I915_WRITE16(IER, 0x0);
3094 POSTING_READ16(IER);
3097 static int i8xx_irq_postinstall(struct drm_device *dev)
3099 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3102 ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3104 /* Unmask the interrupts that we always want on. */
3105 dev_priv->irq_mask =
3106 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3107 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3108 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3109 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3110 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3111 I915_WRITE16(IMR, dev_priv->irq_mask);
3114 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3115 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3116 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3117 I915_USER_INTERRUPT);
3118 POSTING_READ16(IER);
3120 /* Interrupt setup is already guaranteed to be single-threaded, this is
3121 * just to make the assert_spin_locked check happy. */
3122 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3123 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_ENABLE);
3124 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_ENABLE);
3125 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3131 * Returns true when a page flip has completed.
3133 static bool i8xx_handle_vblank(struct drm_device *dev,
3134 int plane, int pipe, u32 iir)
3136 drm_i915_private_t *dev_priv = dev->dev_private;
3137 u16 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3139 if (!drm_handle_vblank(dev, pipe))
3142 if ((iir & flip_pending) == 0)
3145 intel_prepare_page_flip(dev, plane);
3147 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3148 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3149 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3150 * the flip is completed (no longer pending). Since this doesn't raise
3151 * an interrupt per se, we watch for the change at vblank.
3153 if (I915_READ16(ISR) & flip_pending)
3156 intel_finish_page_flip(dev, pipe);
3161 static irqreturn_t i8xx_irq_handler(void *arg)
3163 struct drm_device *dev = (struct drm_device *) arg;
3164 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3169 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3170 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3172 atomic_inc(&dev_priv->irq_received);
3174 iir = I915_READ16(IIR);
3178 while (iir & ~flip_mask) {
3179 /* Can't rely on pipestat interrupt bit in iir as it might
3180 * have been cleared after the pipestat interrupt was received.
3181 * It doesn't set the bit in iir again, but it still produces
3182 * interrupts (for non-MSI).
3184 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3185 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3186 i915_handle_error(dev, false);
3188 for_each_pipe(pipe) {
3189 int reg = PIPESTAT(pipe);
3190 pipe_stats[pipe] = I915_READ(reg);
3193 * Clear the PIPE*STAT regs before the IIR
3195 if (pipe_stats[pipe] & 0x8000ffff) {
3196 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3197 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3199 I915_WRITE(reg, pipe_stats[pipe]);
3202 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3204 I915_WRITE16(IIR, iir & ~flip_mask);
3205 new_iir = I915_READ16(IIR); /* Flush posted writes */
3207 i915_update_dri1_breadcrumb(dev);
3209 if (iir & I915_USER_INTERRUPT)
3210 notify_ring(dev, &dev_priv->ring[RCS]);
3212 for_each_pipe(pipe) {
3217 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3218 i8xx_handle_vblank(dev, plane, pipe, iir))
3219 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3221 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3222 i9xx_pipe_crc_irq_handler(dev, pipe);
3230 static void i8xx_irq_uninstall(struct drm_device * dev)
3232 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3235 for_each_pipe(pipe) {
3236 /* Clear enable bits; then clear status bits */
3237 I915_WRITE(PIPESTAT(pipe), 0);
3238 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3240 I915_WRITE16(IMR, 0xffff);
3241 I915_WRITE16(IER, 0x0);
3242 I915_WRITE16(IIR, I915_READ16(IIR));
3245 static void i915_irq_preinstall(struct drm_device * dev)
3247 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3250 atomic_set(&dev_priv->irq_received, 0);
3252 if (I915_HAS_HOTPLUG(dev)) {
3253 I915_WRITE(PORT_HOTPLUG_EN, 0);
3254 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3257 I915_WRITE16(HWSTAM, 0xeffe);
3259 I915_WRITE(PIPESTAT(pipe), 0);
3260 I915_WRITE(IMR, 0xffffffff);
3261 I915_WRITE(IER, 0x0);
3265 static int i915_irq_postinstall(struct drm_device *dev)
3267 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3270 I915_WRITE(EMR, ~(I915_ERROR_PAGE_TABLE | I915_ERROR_MEMORY_REFRESH));
3272 /* Unmask the interrupts that we always want on. */
3273 dev_priv->irq_mask =
3274 ~(I915_ASLE_INTERRUPT |
3275 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3276 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3277 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3278 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3279 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3282 I915_ASLE_INTERRUPT |
3283 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3284 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3285 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
3286 I915_USER_INTERRUPT;
3288 if (I915_HAS_HOTPLUG(dev)) {
3289 I915_WRITE(PORT_HOTPLUG_EN, 0);
3290 POSTING_READ(PORT_HOTPLUG_EN);
3292 /* Enable in IER... */
3293 enable_mask |= I915_DISPLAY_PORT_INTERRUPT;
3294 /* and unmask in IMR */
3295 dev_priv->irq_mask &= ~I915_DISPLAY_PORT_INTERRUPT;
3298 I915_WRITE(IMR, dev_priv->irq_mask);
3299 I915_WRITE(IER, enable_mask);
3302 i915_enable_asle_pipestat(dev);
3304 /* Interrupt setup is already guaranteed to be single-threaded, this is
3305 * just to make the assert_spin_locked check happy. */
3306 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3307 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_ENABLE);
3308 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_ENABLE);
3309 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3315 * Returns true when a page flip has completed.
3317 static bool i915_handle_vblank(struct drm_device *dev,
3318 int plane, int pipe, u32 iir)
3320 drm_i915_private_t *dev_priv = dev->dev_private;
3321 u32 flip_pending = DISPLAY_PLANE_FLIP_PENDING(plane);
3323 if (!drm_handle_vblank(dev, pipe))
3326 if ((iir & flip_pending) == 0)
3329 intel_prepare_page_flip(dev, plane);
3331 /* We detect FlipDone by looking for the change in PendingFlip from '1'
3332 * to '0' on the following vblank, i.e. IIR has the Pendingflip
3333 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
3334 * the flip is completed (no longer pending). Since this doesn't raise
3335 * an interrupt per se, we watch for the change at vblank.
3337 if (I915_READ(ISR) & flip_pending)
3340 intel_finish_page_flip(dev, pipe);
3345 static irqreturn_t i915_irq_handler(void *arg)
3347 struct drm_device *dev = (struct drm_device *) arg;
3348 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3349 u32 iir, new_iir, pipe_stats[I915_MAX_PIPES];
3351 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3352 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3355 atomic_inc(&dev_priv->irq_received);
3357 iir = I915_READ(IIR);
3359 bool irq_received = (iir & ~flip_mask) != 0;
3360 bool blc_event = false;
3362 /* Can't rely on pipestat interrupt bit in iir as it might
3363 * have been cleared after the pipestat interrupt was received.
3364 * It doesn't set the bit in iir again, but it still produces
3365 * interrupts (for non-MSI).
3367 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3368 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3369 i915_handle_error(dev, false);
3371 for_each_pipe(pipe) {
3372 int reg = PIPESTAT(pipe);
3373 pipe_stats[pipe] = I915_READ(reg);
3375 /* Clear the PIPE*STAT regs before the IIR */
3376 if (pipe_stats[pipe] & 0x8000ffff) {
3377 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3378 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3380 I915_WRITE(reg, pipe_stats[pipe]);
3381 irq_received = true;
3384 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3389 /* Consume port. Then clear IIR or we'll miss events */
3390 if ((I915_HAS_HOTPLUG(dev)) &&
3391 (iir & I915_DISPLAY_PORT_INTERRUPT)) {
3392 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3393 u32 hotplug_trigger = hotplug_status & HOTPLUG_INT_STATUS_I915;
3395 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3398 intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915);
3400 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3401 POSTING_READ(PORT_HOTPLUG_STAT);
3404 I915_WRITE(IIR, iir & ~flip_mask);
3405 new_iir = I915_READ(IIR); /* Flush posted writes */
3407 if (iir & I915_USER_INTERRUPT)
3408 notify_ring(dev, &dev_priv->ring[RCS]);
3410 for_each_pipe(pipe) {
3415 if (pipe_stats[pipe] & PIPE_VBLANK_INTERRUPT_STATUS &&
3416 i915_handle_vblank(dev, plane, pipe, iir))
3417 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(plane);
3419 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3422 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3423 i9xx_pipe_crc_irq_handler(dev, pipe);
3426 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3427 intel_opregion_asle_intr(dev);
3429 /* With MSI, interrupts are only generated when iir
3430 * transitions from zero to nonzero. If another bit got
3431 * set while we were handling the existing iir bits, then
3432 * we would never get another interrupt.
3434 * This is fine on non-MSI as well, as if we hit this path
3435 * we avoid exiting the interrupt handler only to generate
3438 * Note that for MSI this could cause a stray interrupt report
3439 * if an interrupt landed in the time between writing IIR and
3440 * the posting read. This should be rare enough to never
3441 * trigger the 99% of 100,000 interrupts test for disabling
3445 } while (iir & ~flip_mask);
3447 i915_update_dri1_breadcrumb(dev);
3451 static void i915_irq_uninstall(struct drm_device * dev)
3453 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3456 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3458 if (I915_HAS_HOTPLUG(dev)) {
3459 I915_WRITE(PORT_HOTPLUG_EN, 0);
3460 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3463 I915_WRITE16(HWSTAM, 0xffff);
3464 for_each_pipe(pipe) {
3465 /* Clear enable bits; then clear status bits */
3466 I915_WRITE(PIPESTAT(pipe), 0);
3467 I915_WRITE(PIPESTAT(pipe), I915_READ(PIPESTAT(pipe)));
3469 I915_WRITE(IMR, 0xffffffff);
3470 I915_WRITE(IER, 0x0);
3472 I915_WRITE(IIR, I915_READ(IIR));
3475 static void i965_irq_preinstall(struct drm_device * dev)
3477 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3480 atomic_set(&dev_priv->irq_received, 0);
3482 I915_WRITE(PORT_HOTPLUG_EN, 0);
3483 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3485 I915_WRITE(HWSTAM, 0xeffe);
3487 I915_WRITE(PIPESTAT(pipe), 0);
3488 I915_WRITE(IMR, 0xffffffff);
3489 I915_WRITE(IER, 0x0);
3493 static int i965_irq_postinstall(struct drm_device *dev)
3495 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3499 /* Unmask the interrupts that we always want on. */
3500 dev_priv->irq_mask = ~(I915_ASLE_INTERRUPT |
3501 I915_DISPLAY_PORT_INTERRUPT |
3502 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
3503 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
3504 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3505 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
3506 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
3508 enable_mask = ~dev_priv->irq_mask;
3509 enable_mask &= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3510 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
3511 enable_mask |= I915_USER_INTERRUPT;
3514 enable_mask |= I915_BSD_USER_INTERRUPT;
3516 /* Interrupt setup is already guaranteed to be single-threaded, this is
3517 * just to make the assert_spin_locked check happy. */
3518 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3519 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_GMBUS_EVENT_ENABLE);
3520 i915_enable_pipestat(dev_priv, PIPE_A, PIPE_CRC_DONE_ENABLE);
3521 i915_enable_pipestat(dev_priv, PIPE_B, PIPE_CRC_DONE_ENABLE);
3522 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3525 * Enable some error detection, note the instruction error mask
3526 * bit is reserved, so we leave it masked.
3529 error_mask = ~(GM45_ERROR_PAGE_TABLE |
3530 GM45_ERROR_MEM_PRIV |
3531 GM45_ERROR_CP_PRIV |
3532 I915_ERROR_MEMORY_REFRESH);
3534 error_mask = ~(I915_ERROR_PAGE_TABLE |
3535 I915_ERROR_MEMORY_REFRESH);
3537 I915_WRITE(EMR, error_mask);
3539 I915_WRITE(IMR, dev_priv->irq_mask);
3540 I915_WRITE(IER, enable_mask);
3543 I915_WRITE(PORT_HOTPLUG_EN, 0);
3544 POSTING_READ(PORT_HOTPLUG_EN);
3546 i915_enable_asle_pipestat(dev);
3551 static void i915_hpd_irq_setup(struct drm_device *dev)
3553 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3554 struct drm_mode_config *mode_config = &dev->mode_config;
3555 struct intel_encoder *intel_encoder;
3558 assert_spin_locked(&dev_priv->irq_lock);
3560 if (I915_HAS_HOTPLUG(dev)) {
3561 hotplug_en = I915_READ(PORT_HOTPLUG_EN);
3562 hotplug_en &= ~HOTPLUG_INT_EN_MASK;
3563 /* Note HDMI and DP share hotplug bits */
3564 /* enable bits are the same for all generations */
3565 list_for_each_entry(intel_encoder, &mode_config->encoder_list, base.head)
3566 if (dev_priv->hpd_stats[intel_encoder->hpd_pin].hpd_mark == HPD_ENABLED)
3567 hotplug_en |= hpd_mask_i915[intel_encoder->hpd_pin];
3568 /* Programming the CRT detection parameters tends
3569 to generate a spurious hotplug event about three
3570 seconds later. So just do it once.
3573 hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
3574 hotplug_en &= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK;
3575 hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
3577 /* Ignore TV since it's buggy */
3578 I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);
3582 static irqreturn_t i965_irq_handler(void *arg)
3584 struct drm_device *dev = (struct drm_device *) arg;
3585 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3587 u32 pipe_stats[I915_MAX_PIPES];
3591 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
3592 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
3594 atomic_inc(&dev_priv->irq_received);
3596 iir = I915_READ(IIR);
3599 bool blc_event = false;
3601 irq_received = (iir & ~flip_mask) != 0;
3603 /* Can't rely on pipestat interrupt bit in iir as it might
3604 * have been cleared after the pipestat interrupt was received.
3605 * It doesn't set the bit in iir again, but it still produces
3606 * interrupts (for non-MSI).
3608 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3609 if (iir & I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT)
3610 i915_handle_error(dev, false);
3612 for_each_pipe(pipe) {
3613 int reg = PIPESTAT(pipe);
3614 pipe_stats[pipe] = I915_READ(reg);
3617 * Clear the PIPE*STAT regs before the IIR
3619 if (pipe_stats[pipe] & 0x8000ffff) {
3620 if (pipe_stats[pipe] & PIPE_FIFO_UNDERRUN_STATUS)
3621 DRM_DEBUG_DRIVER("pipe %c underrun\n",
3623 I915_WRITE(reg, pipe_stats[pipe]);
3627 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3633 /* Consume port. Then clear IIR or we'll miss events */
3634 if (iir & I915_DISPLAY_PORT_INTERRUPT) {
3635 u32 hotplug_status = I915_READ(PORT_HOTPLUG_STAT);
3636 u32 hotplug_trigger = hotplug_status & (IS_G4X(dev) ?
3637 HOTPLUG_INT_STATUS_G4X :
3638 HOTPLUG_INT_STATUS_I915);
3640 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
3643 intel_hpd_irq_handler(dev, hotplug_trigger,
3644 IS_G4X(dev) ? hpd_status_g4x : hpd_status_i915);
3647 (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X))
3648 dp_aux_irq_handler(dev);
3650 I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status);
3651 I915_READ(PORT_HOTPLUG_STAT);
3654 I915_WRITE(IIR, iir & ~flip_mask);
3655 new_iir = I915_READ(IIR); /* Flush posted writes */
3657 if (iir & I915_USER_INTERRUPT)
3658 notify_ring(dev, &dev_priv->ring[RCS]);
3659 if (iir & I915_BSD_USER_INTERRUPT)
3660 notify_ring(dev, &dev_priv->ring[VCS]);
3662 for_each_pipe(pipe) {
3663 if (pipe_stats[pipe] & PIPE_START_VBLANK_INTERRUPT_STATUS &&
3664 i915_handle_vblank(dev, pipe, pipe, iir))
3665 flip_mask &= ~DISPLAY_PLANE_FLIP_PENDING(pipe);
3667 if (pipe_stats[pipe] & PIPE_LEGACY_BLC_EVENT_STATUS)
3670 if (pipe_stats[pipe] & PIPE_CRC_DONE_INTERRUPT_STATUS)
3671 i9xx_pipe_crc_irq_handler(dev, pipe);
3675 if (blc_event || (iir & I915_ASLE_INTERRUPT))
3676 intel_opregion_asle_intr(dev);
3678 if (pipe_stats[0] & PIPE_GMBUS_INTERRUPT_STATUS)
3679 gmbus_irq_handler(dev);
3681 /* With MSI, interrupts are only generated when iir
3682 * transitions from zero to nonzero. If another bit got
3683 * set while we were handling the existing iir bits, then
3684 * we would never get another interrupt.
3686 * This is fine on non-MSI as well, as if we hit this path
3687 * we avoid exiting the interrupt handler only to generate
3690 * Note that for MSI this could cause a stray interrupt report
3691 * if an interrupt landed in the time between writing IIR and
3692 * the posting read. This should be rare enough to never
3693 * trigger the 99% of 100,000 interrupts test for disabling
3699 i915_update_dri1_breadcrumb(dev);
3703 static void i965_irq_uninstall(struct drm_device * dev)
3705 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
3711 del_timer_sync(&dev_priv->hotplug_reenable_timer);
3713 I915_WRITE(PORT_HOTPLUG_EN, 0);
3714 I915_WRITE(PORT_HOTPLUG_STAT, I915_READ(PORT_HOTPLUG_STAT));
3716 I915_WRITE(HWSTAM, 0xffffffff);
3718 I915_WRITE(PIPESTAT(pipe), 0);
3719 I915_WRITE(IMR, 0xffffffff);
3720 I915_WRITE(IER, 0x0);
3723 I915_WRITE(PIPESTAT(pipe),
3724 I915_READ(PIPESTAT(pipe)) & 0x8000ffff);
3725 I915_WRITE(IIR, I915_READ(IIR));
3728 static void i915_reenable_hotplug_timer_func(unsigned long data)
3730 drm_i915_private_t *dev_priv = (drm_i915_private_t *)data;
3731 struct drm_device *dev = dev_priv->dev;
3732 struct drm_mode_config *mode_config = &dev->mode_config;
3735 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3736 for (i = (HPD_NONE + 1); i < HPD_NUM_PINS; i++) {
3737 struct drm_connector *connector;
3739 if (dev_priv->hpd_stats[i].hpd_mark != HPD_DISABLED)
3742 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3744 list_for_each_entry(connector, &mode_config->connector_list, head) {
3745 struct intel_connector *intel_connector = to_intel_connector(connector);
3747 if (intel_connector->encoder->hpd_pin == i) {
3748 if (connector->polled != intel_connector->polled)
3749 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
3750 drm_get_connector_name(connector));
3751 connector->polled = intel_connector->polled;
3752 if (!connector->polled)
3753 connector->polled = DRM_CONNECTOR_POLL_HPD;
3757 if (dev_priv->display.hpd_irq_setup)
3758 dev_priv->display.hpd_irq_setup(dev);
3759 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3762 void intel_irq_init(struct drm_device *dev)
3764 struct drm_i915_private *dev_priv = dev->dev_private;
3766 INIT_WORK(&dev_priv->hotplug_work, i915_hotplug_work_func);
3767 INIT_WORK(&dev_priv->gpu_error.work, i915_error_work_func);
3768 INIT_WORK(&dev_priv->rps.work, gen6_pm_rps_work);
3769 INIT_WORK(&dev_priv->l3_parity.error_work, ivybridge_parity_work);
3771 setup_timer(&dev_priv->gpu_error.hangcheck_timer,
3772 i915_hangcheck_elapsed,
3773 (unsigned long) dev);
3774 setup_timer(&dev_priv->hotplug_reenable_timer, i915_reenable_hotplug_timer_func,
3775 (unsigned long) dev_priv);
3777 pm_qos_add_request(&dev_priv->pm_qos, PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
3780 dev->max_vblank_count = 0;
3781 dev->driver->get_vblank_counter = i8xx_get_vblank_counter;
3782 } else if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
3783 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */
3784 dev->driver->get_vblank_counter = gm45_get_vblank_counter;
3786 dev->driver->get_vblank_counter = i915_get_vblank_counter;
3787 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
3790 if (drm_core_check_feature(dev, DRIVER_MODESET)) {
3791 dev->driver->get_vblank_timestamp = i915_get_vblank_timestamp;
3792 dev->driver->get_scanout_position = i915_get_crtc_scanoutpos;
3795 if (IS_VALLEYVIEW(dev)) {
3796 dev->driver->irq_handler = valleyview_irq_handler;
3797 dev->driver->irq_preinstall = valleyview_irq_preinstall;
3798 dev->driver->irq_postinstall = valleyview_irq_postinstall;
3799 dev->driver->irq_uninstall = valleyview_irq_uninstall;
3800 dev->driver->enable_vblank = valleyview_enable_vblank;
3801 dev->driver->disable_vblank = valleyview_disable_vblank;
3802 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3803 } else if (IS_GEN8(dev)) {
3804 dev->driver->irq_handler = gen8_irq_handler;
3805 dev->driver->irq_preinstall = gen8_irq_preinstall;
3806 dev->driver->irq_postinstall = gen8_irq_postinstall;
3807 dev->driver->irq_uninstall = gen8_irq_uninstall;
3808 dev->driver->enable_vblank = gen8_enable_vblank;
3809 dev->driver->disable_vblank = gen8_disable_vblank;
3810 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3811 } else if (HAS_PCH_SPLIT(dev)) {
3812 dev->driver->irq_handler = ironlake_irq_handler;
3813 dev->driver->irq_preinstall = ironlake_irq_preinstall;
3814 dev->driver->irq_postinstall = ironlake_irq_postinstall;
3815 dev->driver->irq_uninstall = ironlake_irq_uninstall;
3816 dev->driver->enable_vblank = ironlake_enable_vblank;
3817 dev->driver->disable_vblank = ironlake_disable_vblank;
3818 dev_priv->display.hpd_irq_setup = ibx_hpd_irq_setup;
3820 if (INTEL_INFO(dev)->gen == 2) {
3821 dev->driver->irq_preinstall = i8xx_irq_preinstall;
3822 dev->driver->irq_postinstall = i8xx_irq_postinstall;
3823 dev->driver->irq_handler = i8xx_irq_handler;
3824 dev->driver->irq_uninstall = i8xx_irq_uninstall;
3825 } else if (INTEL_INFO(dev)->gen == 3) {
3826 dev->driver->irq_preinstall = i915_irq_preinstall;
3827 dev->driver->irq_postinstall = i915_irq_postinstall;
3828 dev->driver->irq_uninstall = i915_irq_uninstall;
3829 dev->driver->irq_handler = i915_irq_handler;
3830 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3832 dev->driver->irq_preinstall = i965_irq_preinstall;
3833 dev->driver->irq_postinstall = i965_irq_postinstall;
3834 dev->driver->irq_uninstall = i965_irq_uninstall;
3835 dev->driver->irq_handler = i965_irq_handler;
3836 dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
3838 dev->driver->enable_vblank = i915_enable_vblank;
3839 dev->driver->disable_vblank = i915_disable_vblank;
3843 void intel_hpd_init(struct drm_device *dev)
3845 struct drm_i915_private *dev_priv = dev->dev_private;
3846 struct drm_mode_config *mode_config = &dev->mode_config;
3847 struct drm_connector *connector;
3850 for (i = 1; i < HPD_NUM_PINS; i++) {
3851 dev_priv->hpd_stats[i].hpd_cnt = 0;
3852 dev_priv->hpd_stats[i].hpd_mark = HPD_ENABLED;
3854 list_for_each_entry(connector, &mode_config->connector_list, head) {
3855 struct intel_connector *intel_connector = to_intel_connector(connector);
3856 connector->polled = intel_connector->polled;
3857 if (!connector->polled && I915_HAS_HOTPLUG(dev) && intel_connector->encoder->hpd_pin > HPD_NONE)
3858 connector->polled = DRM_CONNECTOR_POLL_HPD;
3861 /* Interrupt setup is already guaranteed to be single-threaded, this is
3862 * just to make the assert_spin_locked checks happy. */
3863 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3864 if (dev_priv->display.hpd_irq_setup)
3865 dev_priv->display.hpd_irq_setup(dev);
3866 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3869 /* Disable interrupts so we can allow Package C8+. */
3870 void hsw_pc8_disable_interrupts(struct drm_device *dev)
3872 struct drm_i915_private *dev_priv = dev->dev_private;
3874 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3876 dev_priv->pc8.regsave.deimr = I915_READ(DEIMR);
3877 dev_priv->pc8.regsave.sdeimr = I915_READ(SDEIMR);
3878 dev_priv->pc8.regsave.gtimr = I915_READ(GTIMR);
3879 dev_priv->pc8.regsave.gtier = I915_READ(GTIER);
3880 dev_priv->pc8.regsave.gen6_pmimr = I915_READ(GEN6_PMIMR);
3882 ironlake_disable_display_irq(dev_priv, 0xffffffff);
3883 ibx_disable_display_interrupt(dev_priv, 0xffffffff);
3884 ilk_disable_gt_irq(dev_priv, 0xffffffff);
3885 snb_disable_pm_irq(dev_priv, 0xffffffff);
3887 dev_priv->pc8.irqs_disabled = true;
3889 lockmgr(&dev_priv->irq_lock, LK_RELEASE);
3892 /* Restore interrupts so we can recover from Package C8+. */
3893 void hsw_pc8_restore_interrupts(struct drm_device *dev)
3895 struct drm_i915_private *dev_priv = dev->dev_private;
3898 lockmgr(&dev_priv->irq_lock, LK_EXCLUSIVE);
3900 val = I915_READ(DEIMR);
3901 WARN(val != 0xffffffff, "DEIMR is 0x%08x\n", val);
3903 val = I915_READ(SDEIMR);
3904 WARN(val != 0xffffffff, "SDEIMR is 0x%08x\n", val);
3906 val = I915_READ(GTIMR);
3907 WARN(val != 0xffffffff, "GTIMR is 0x%08x\n", val);
3909 val = I915_READ(GEN6_PMIMR);
3910 WARN(val != 0xffffffff, "GEN6_PMIMR is 0x%08x\n", val);
3912 dev_priv->pc8.irqs_disabled = false;
3914 ironlake_enable_display_irq(dev_priv, ~dev_priv->pc8.regsave.deimr);
3915 ibx_enable_display_interrupt(dev_priv, ~dev_priv->pc8.regsave.sdeimr);
3916 ilk_enable_gt_irq(dev_priv, ~dev_priv->pc8.regsave.gtimr);
3917 snb_enable_pm_irq(dev_priv, ~dev_priv->pc8.regsave.gen6_pmimr);
3918 I915_WRITE(GTIER, dev_priv->pc8.regsave.gtier);
3920 lockmgr(&dev_priv->irq_lock, LK_RELEASE);