1 /* i915_irq.c -- IRQ support for the I915 -*- linux-c -*-
4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/sysrq.h>
32 #include <linux/slab.h>
34 #include <drm/i915_drm.h>
36 #include "i915_trace.h"
37 #include "intel_drv.h"
39 static const u32 hpd_ibx
[] = {
40 [HPD_CRT
] = SDE_CRT_HOTPLUG
,
41 [HPD_SDVO_B
] = SDE_SDVOB_HOTPLUG
,
42 [HPD_PORT_B
] = SDE_PORTB_HOTPLUG
,
43 [HPD_PORT_C
] = SDE_PORTC_HOTPLUG
,
44 [HPD_PORT_D
] = SDE_PORTD_HOTPLUG
47 static const u32 hpd_cpt
[] = {
48 [HPD_CRT
] = SDE_CRT_HOTPLUG_CPT
,
49 [HPD_SDVO_B
] = SDE_SDVOB_HOTPLUG_CPT
,
50 [HPD_PORT_B
] = SDE_PORTB_HOTPLUG_CPT
,
51 [HPD_PORT_C
] = SDE_PORTC_HOTPLUG_CPT
,
52 [HPD_PORT_D
] = SDE_PORTD_HOTPLUG_CPT
55 static const u32 hpd_mask_i915
[] = {
56 [HPD_CRT
] = CRT_HOTPLUG_INT_EN
,
57 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_EN
,
58 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_EN
,
59 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_EN
,
60 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_EN
,
61 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_EN
64 static const u32 hpd_status_gen4
[] = {
65 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
66 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_G4X
,
67 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_G4X
,
68 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
69 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
70 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
73 static const u32 hpd_status_i915
[] = { /* i915 and valleyview are the same */
74 [HPD_CRT
] = CRT_HOTPLUG_INT_STATUS
,
75 [HPD_SDVO_B
] = SDVOB_HOTPLUG_INT_STATUS_I915
,
76 [HPD_SDVO_C
] = SDVOC_HOTPLUG_INT_STATUS_I915
,
77 [HPD_PORT_B
] = PORTB_HOTPLUG_INT_STATUS
,
78 [HPD_PORT_C
] = PORTC_HOTPLUG_INT_STATUS
,
79 [HPD_PORT_D
] = PORTD_HOTPLUG_INT_STATUS
82 /* For display hotplug interrupt */
84 ironlake_enable_display_irq(drm_i915_private_t
*dev_priv
, u32 mask
)
86 assert_spin_locked(&dev_priv
->irq_lock
);
88 if ((dev_priv
->irq_mask
& mask
) != 0) {
89 dev_priv
->irq_mask
&= ~mask
;
90 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
96 ironlake_disable_display_irq(drm_i915_private_t
*dev_priv
, u32 mask
)
98 assert_spin_locked(&dev_priv
->irq_lock
);
100 if ((dev_priv
->irq_mask
& mask
) != mask
) {
101 dev_priv
->irq_mask
|= mask
;
102 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
108 * ilk_update_gt_irq - update GTIMR
109 * @dev_priv: driver private
110 * @interrupt_mask: mask of interrupt bits to update
111 * @enabled_irq_mask: mask of interrupt bits to enable
113 static void ilk_update_gt_irq(struct drm_i915_private
*dev_priv
,
114 uint32_t interrupt_mask
,
115 uint32_t enabled_irq_mask
)
117 assert_spin_locked(&dev_priv
->irq_lock
);
119 dev_priv
->gt_irq_mask
&= ~interrupt_mask
;
120 dev_priv
->gt_irq_mask
|= (~enabled_irq_mask
& interrupt_mask
);
121 I915_WRITE(GTIMR
, dev_priv
->gt_irq_mask
);
125 void ilk_enable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
127 ilk_update_gt_irq(dev_priv
, mask
, mask
);
130 void ilk_disable_gt_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
132 ilk_update_gt_irq(dev_priv
, mask
, 0);
136 * snb_update_pm_irq - update GEN6_PMIMR
137 * @dev_priv: driver private
138 * @interrupt_mask: mask of interrupt bits to update
139 * @enabled_irq_mask: mask of interrupt bits to enable
141 static void snb_update_pm_irq(struct drm_i915_private
*dev_priv
,
142 uint32_t interrupt_mask
,
143 uint32_t enabled_irq_mask
)
147 assert_spin_locked(&dev_priv
->irq_lock
);
149 new_val
= dev_priv
->pm_irq_mask
;
150 new_val
&= ~interrupt_mask
;
151 new_val
|= (~enabled_irq_mask
& interrupt_mask
);
153 if (new_val
!= dev_priv
->pm_irq_mask
) {
154 dev_priv
->pm_irq_mask
= new_val
;
155 I915_WRITE(GEN6_PMIMR
, dev_priv
->pm_irq_mask
);
156 POSTING_READ(GEN6_PMIMR
);
160 void snb_enable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
162 snb_update_pm_irq(dev_priv
, mask
, mask
);
165 void snb_disable_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t mask
)
167 snb_update_pm_irq(dev_priv
, mask
, 0);
170 static void snb_set_pm_irq(struct drm_i915_private
*dev_priv
, uint32_t val
)
172 snb_update_pm_irq(dev_priv
, 0xffffffff, ~val
);
175 static bool ivb_can_enable_err_int(struct drm_device
*dev
)
177 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
178 struct intel_crtc
*crtc
;
181 assert_spin_locked(&dev_priv
->irq_lock
);
183 for_each_pipe(pipe
) {
184 crtc
= to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
186 if (crtc
->cpu_fifo_underrun_disabled
)
193 static bool cpt_can_enable_serr_int(struct drm_device
*dev
)
195 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
197 struct intel_crtc
*crtc
;
199 assert_spin_locked(&dev_priv
->irq_lock
);
201 for_each_pipe(pipe
) {
202 crtc
= to_intel_crtc(dev_priv
->pipe_to_crtc_mapping
[pipe
]);
204 if (crtc
->pch_fifo_underrun_disabled
)
211 static void ironlake_set_fifo_underrun_reporting(struct drm_device
*dev
,
212 enum pipe pipe
, bool enable
)
214 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
215 uint32_t bit
= (pipe
== PIPE_A
) ? DE_PIPEA_FIFO_UNDERRUN
:
216 DE_PIPEB_FIFO_UNDERRUN
;
219 ironlake_enable_display_irq(dev_priv
, bit
);
221 ironlake_disable_display_irq(dev_priv
, bit
);
224 static void ivybridge_set_fifo_underrun_reporting(struct drm_device
*dev
,
225 enum pipe pipe
, bool enable
)
227 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
229 I915_WRITE(GEN7_ERR_INT
, ERR_INT_FIFO_UNDERRUN(pipe
));
231 if (!ivb_can_enable_err_int(dev
))
234 ironlake_enable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
236 bool was_enabled
= !(I915_READ(DEIMR
) & DE_ERR_INT_IVB
);
238 /* Change the state _after_ we've read out the current one. */
239 ironlake_disable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
242 (I915_READ(GEN7_ERR_INT
) & ERR_INT_FIFO_UNDERRUN(pipe
))) {
243 DRM_DEBUG_KMS("uncleared fifo underrun on pipe %c\n",
250 * ibx_display_interrupt_update - update SDEIMR
251 * @dev_priv: driver private
252 * @interrupt_mask: mask of interrupt bits to update
253 * @enabled_irq_mask: mask of interrupt bits to enable
255 static void ibx_display_interrupt_update(struct drm_i915_private
*dev_priv
,
256 uint32_t interrupt_mask
,
257 uint32_t enabled_irq_mask
)
259 uint32_t sdeimr
= I915_READ(SDEIMR
);
260 sdeimr
&= ~interrupt_mask
;
261 sdeimr
|= (~enabled_irq_mask
& interrupt_mask
);
263 assert_spin_locked(&dev_priv
->irq_lock
);
265 I915_WRITE(SDEIMR
, sdeimr
);
266 POSTING_READ(SDEIMR
);
268 #define ibx_enable_display_interrupt(dev_priv, bits) \
269 ibx_display_interrupt_update((dev_priv), (bits), (bits))
270 #define ibx_disable_display_interrupt(dev_priv, bits) \
271 ibx_display_interrupt_update((dev_priv), (bits), 0)
273 static void ibx_set_fifo_underrun_reporting(struct drm_device
*dev
,
274 enum transcoder pch_transcoder
,
277 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
278 uint32_t bit
= (pch_transcoder
== TRANSCODER_A
) ?
279 SDE_TRANSA_FIFO_UNDER
: SDE_TRANSB_FIFO_UNDER
;
282 ibx_enable_display_interrupt(dev_priv
, bit
);
284 ibx_disable_display_interrupt(dev_priv
, bit
);
287 static void cpt_set_fifo_underrun_reporting(struct drm_device
*dev
,
288 enum transcoder pch_transcoder
,
291 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
295 SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder
));
297 if (!cpt_can_enable_serr_int(dev
))
300 ibx_enable_display_interrupt(dev_priv
, SDE_ERROR_CPT
);
302 uint32_t tmp
= I915_READ(SERR_INT
);
303 bool was_enabled
= !(I915_READ(SDEIMR
) & SDE_ERROR_CPT
);
305 /* Change the state _after_ we've read out the current one. */
306 ibx_disable_display_interrupt(dev_priv
, SDE_ERROR_CPT
);
309 (tmp
& SERR_INT_TRANS_FIFO_UNDERRUN(pch_transcoder
))) {
310 DRM_DEBUG_KMS("uncleared pch fifo underrun on pch transcoder %c\n",
311 transcoder_name(pch_transcoder
));
317 * intel_set_cpu_fifo_underrun_reporting - enable/disable FIFO underrun messages
320 * @enable: true if we want to report FIFO underrun errors, false otherwise
322 * This function makes us disable or enable CPU fifo underruns for a specific
323 * pipe. Notice that on some Gens (e.g. IVB, HSW), disabling FIFO underrun
324 * reporting for one pipe may also disable all the other CPU error interruts for
325 * the other pipes, due to the fact that there's just one interrupt mask/enable
326 * bit for all the pipes.
328 * Returns the previous state of underrun reporting.
330 bool intel_set_cpu_fifo_underrun_reporting(struct drm_device
*dev
,
331 enum pipe pipe
, bool enable
)
333 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
334 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
335 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
339 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
341 ret
= !intel_crtc
->cpu_fifo_underrun_disabled
;
346 intel_crtc
->cpu_fifo_underrun_disabled
= !enable
;
348 if (IS_GEN5(dev
) || IS_GEN6(dev
))
349 ironlake_set_fifo_underrun_reporting(dev
, pipe
, enable
);
350 else if (IS_GEN7(dev
))
351 ivybridge_set_fifo_underrun_reporting(dev
, pipe
, enable
);
354 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
359 * intel_set_pch_fifo_underrun_reporting - enable/disable FIFO underrun messages
361 * @pch_transcoder: the PCH transcoder (same as pipe on IVB and older)
362 * @enable: true if we want to report FIFO underrun errors, false otherwise
364 * This function makes us disable or enable PCH fifo underruns for a specific
365 * PCH transcoder. Notice that on some PCHs (e.g. CPT/PPT), disabling FIFO
366 * underrun reporting for one transcoder may also disable all the other PCH
367 * error interruts for the other transcoders, due to the fact that there's just
368 * one interrupt mask/enable bit for all the transcoders.
370 * Returns the previous state of underrun reporting.
372 bool intel_set_pch_fifo_underrun_reporting(struct drm_device
*dev
,
373 enum transcoder pch_transcoder
,
376 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
377 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pch_transcoder
];
378 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
383 * NOTE: Pre-LPT has a fixed cpu pipe -> pch transcoder mapping, but LPT
384 * has only one pch transcoder A that all pipes can use. To avoid racy
385 * pch transcoder -> pipe lookups from interrupt code simply store the
386 * underrun statistics in crtc A. Since we never expose this anywhere
387 * nor use it outside of the fifo underrun code here using the "wrong"
388 * crtc on LPT won't cause issues.
391 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
393 ret
= !intel_crtc
->pch_fifo_underrun_disabled
;
398 intel_crtc
->pch_fifo_underrun_disabled
= !enable
;
400 if (HAS_PCH_IBX(dev
))
401 ibx_set_fifo_underrun_reporting(dev
, pch_transcoder
, enable
);
403 cpt_set_fifo_underrun_reporting(dev
, pch_transcoder
, enable
);
406 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
412 i915_enable_pipestat(drm_i915_private_t
*dev_priv
, int pipe
, u32 mask
)
414 u32 reg
= PIPESTAT(pipe
);
415 u32 pipestat
= I915_READ(reg
) & 0x7fff0000;
417 assert_spin_locked(&dev_priv
->irq_lock
);
419 if ((pipestat
& mask
) == mask
)
422 /* Enable the interrupt, clear any pending status */
423 pipestat
|= mask
| (mask
>> 16);
424 I915_WRITE(reg
, pipestat
);
429 i915_disable_pipestat(drm_i915_private_t
*dev_priv
, int pipe
, u32 mask
)
431 u32 reg
= PIPESTAT(pipe
);
432 u32 pipestat
= I915_READ(reg
) & 0x7fff0000;
434 assert_spin_locked(&dev_priv
->irq_lock
);
436 if ((pipestat
& mask
) == 0)
440 I915_WRITE(reg
, pipestat
);
445 * i915_enable_asle_pipestat - enable ASLE pipestat for OpRegion
447 static void i915_enable_asle_pipestat(struct drm_device
*dev
)
449 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
450 unsigned long irqflags
;
452 if (!dev_priv
->opregion
.asle
|| !IS_MOBILE(dev
))
455 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
457 i915_enable_pipestat(dev_priv
, 1, PIPE_LEGACY_BLC_EVENT_ENABLE
);
458 if (INTEL_INFO(dev
)->gen
>= 4)
459 i915_enable_pipestat(dev_priv
, 0, PIPE_LEGACY_BLC_EVENT_ENABLE
);
461 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
465 * i915_pipe_enabled - check if a pipe is enabled
467 * @pipe: pipe to check
469 * Reading certain registers when the pipe is disabled can hang the chip.
470 * Use this routine to make sure the PLL is running and the pipe is active
471 * before reading such registers if unsure.
474 i915_pipe_enabled(struct drm_device
*dev
, int pipe
)
476 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
478 if (drm_core_check_feature(dev
, DRIVER_MODESET
)) {
479 /* Locking is horribly broken here, but whatever. */
480 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
481 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
483 return intel_crtc
->active
;
485 return I915_READ(PIPECONF(pipe
)) & PIPECONF_ENABLE
;
489 /* Called from drm generic code, passed a 'crtc', which
490 * we use as a pipe index
492 static u32
i915_get_vblank_counter(struct drm_device
*dev
, int pipe
)
494 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
495 unsigned long high_frame
;
496 unsigned long low_frame
;
497 u32 high1
, high2
, low
;
499 if (!i915_pipe_enabled(dev
, pipe
)) {
500 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
501 "pipe %c\n", pipe_name(pipe
));
505 high_frame
= PIPEFRAME(pipe
);
506 low_frame
= PIPEFRAMEPIXEL(pipe
);
509 * High & low register fields aren't synchronized, so make sure
510 * we get a low value that's stable across two reads of the high
514 high1
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
515 low
= I915_READ(low_frame
) & PIPE_FRAME_LOW_MASK
;
516 high2
= I915_READ(high_frame
) & PIPE_FRAME_HIGH_MASK
;
517 } while (high1
!= high2
);
519 high1
>>= PIPE_FRAME_HIGH_SHIFT
;
520 low
>>= PIPE_FRAME_LOW_SHIFT
;
521 return (high1
<< 8) | low
;
524 static u32
gm45_get_vblank_counter(struct drm_device
*dev
, int pipe
)
526 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
527 int reg
= PIPE_FRMCOUNT_GM45(pipe
);
529 if (!i915_pipe_enabled(dev
, pipe
)) {
530 DRM_DEBUG_DRIVER("trying to get vblank count for disabled "
531 "pipe %c\n", pipe_name(pipe
));
535 return I915_READ(reg
);
538 static int i915_get_crtc_scanoutpos(struct drm_device
*dev
, int pipe
,
539 int *vpos
, int *hpos
)
541 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
542 u32 vbl
= 0, position
= 0;
543 int vbl_start
, vbl_end
, htotal
, vtotal
;
546 enum transcoder cpu_transcoder
= intel_pipe_to_cpu_transcoder(dev_priv
,
549 if (!i915_pipe_enabled(dev
, pipe
)) {
550 DRM_DEBUG_DRIVER("trying to get scanoutpos for disabled "
551 "pipe %c\n", pipe_name(pipe
));
556 vtotal
= 1 + ((I915_READ(VTOTAL(cpu_transcoder
)) >> 16) & 0x1fff);
558 if (INTEL_INFO(dev
)->gen
>= 4) {
559 /* No obvious pixelcount register. Only query vertical
560 * scanout position from Display scan line register.
562 position
= I915_READ(PIPEDSL(pipe
));
564 /* Decode into vertical scanout position. Don't have
565 * horizontal scanout position.
567 *vpos
= position
& 0x1fff;
570 /* Have access to pixelcount since start of frame.
571 * We can split this into vertical and horizontal
574 position
= (I915_READ(PIPEFRAMEPIXEL(pipe
)) & PIPE_PIXEL_MASK
) >> PIPE_PIXEL_SHIFT
;
576 htotal
= 1 + ((I915_READ(HTOTAL(cpu_transcoder
)) >> 16) & 0x1fff);
577 *vpos
= position
/ htotal
;
578 *hpos
= position
- (*vpos
* htotal
);
581 /* Query vblank area. */
582 vbl
= I915_READ(VBLANK(cpu_transcoder
));
584 /* Test position against vblank region. */
585 vbl_start
= vbl
& 0x1fff;
586 vbl_end
= (vbl
>> 16) & 0x1fff;
588 if ((*vpos
< vbl_start
) || (*vpos
> vbl_end
))
591 /* Inside "upper part" of vblank area? Apply corrective offset: */
592 if (in_vbl
&& (*vpos
>= vbl_start
))
593 *vpos
= *vpos
- vtotal
;
595 /* Readouts valid? */
597 ret
|= DRM_SCANOUTPOS_VALID
| DRM_SCANOUTPOS_ACCURATE
;
601 ret
|= DRM_SCANOUTPOS_INVBL
;
606 static int i915_get_vblank_timestamp(struct drm_device
*dev
, int pipe
,
608 struct timeval
*vblank_time
,
611 struct drm_crtc
*crtc
;
613 if (pipe
< 0 || pipe
>= INTEL_INFO(dev
)->num_pipes
) {
614 DRM_ERROR("Invalid crtc %d\n", pipe
);
618 /* Get drm_crtc to timestamp: */
619 crtc
= intel_get_crtc_for_pipe(dev
, pipe
);
621 DRM_ERROR("Invalid crtc %d\n", pipe
);
625 if (!crtc
->enabled
) {
626 DRM_DEBUG_KMS("crtc %d is disabled\n", pipe
);
630 /* Helper routine in DRM core does all the work: */
631 return drm_calc_vbltimestamp_from_scanoutpos(dev
, pipe
, max_error
,
636 static int intel_hpd_irq_event(struct drm_device
*dev
, struct drm_connector
*connector
)
638 enum drm_connector_status old_status
;
640 WARN_ON(!mutex_is_locked(&dev
->mode_config
.mutex
));
641 old_status
= connector
->status
;
643 connector
->status
= connector
->funcs
->detect(connector
, false);
644 DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
646 drm_get_connector_name(connector
),
647 old_status
, connector
->status
);
648 return (old_status
!= connector
->status
);
652 * Handle hotplug events outside the interrupt handler proper.
654 #define I915_REENABLE_HOTPLUG_DELAY (2*60*1000)
656 static void i915_hotplug_work_func(struct work_struct
*work
)
658 drm_i915_private_t
*dev_priv
= container_of(work
, drm_i915_private_t
,
660 struct drm_device
*dev
= dev_priv
->dev
;
661 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
662 struct intel_connector
*intel_connector
;
663 struct intel_encoder
*intel_encoder
;
664 struct drm_connector
*connector
;
665 unsigned long irqflags
;
666 bool hpd_disabled
= false;
667 bool changed
= false;
670 /* HPD irq before everything is fully set up. */
671 if (!dev_priv
->enable_hotplug_processing
)
674 mutex_lock(&mode_config
->mutex
);
675 DRM_DEBUG_KMS("running encoder hotplug functions\n");
677 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
679 hpd_event_bits
= dev_priv
->hpd_event_bits
;
680 dev_priv
->hpd_event_bits
= 0;
681 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
682 intel_connector
= to_intel_connector(connector
);
683 intel_encoder
= intel_connector
->encoder
;
684 if (intel_encoder
->hpd_pin
> HPD_NONE
&&
685 dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_MARK_DISABLED
&&
686 connector
->polled
== DRM_CONNECTOR_POLL_HPD
) {
687 DRM_INFO("HPD interrupt storm detected on connector %s: "
688 "switching from hotplug detection to polling\n",
689 drm_get_connector_name(connector
));
690 dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
= HPD_DISABLED
;
691 connector
->polled
= DRM_CONNECTOR_POLL_CONNECT
692 | DRM_CONNECTOR_POLL_DISCONNECT
;
695 if (hpd_event_bits
& (1 << intel_encoder
->hpd_pin
)) {
696 DRM_DEBUG_KMS("Connector %s (pin %i) received hotplug event.\n",
697 drm_get_connector_name(connector
), intel_encoder
->hpd_pin
);
700 /* if there were no outputs to poll, poll was disabled,
701 * therefore make sure it's enabled when disabling HPD on
704 drm_kms_helper_poll_enable(dev
);
705 mod_timer(&dev_priv
->hotplug_reenable_timer
,
706 jiffies
+ msecs_to_jiffies(I915_REENABLE_HOTPLUG_DELAY
));
709 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
711 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
712 intel_connector
= to_intel_connector(connector
);
713 intel_encoder
= intel_connector
->encoder
;
714 if (hpd_event_bits
& (1 << intel_encoder
->hpd_pin
)) {
715 if (intel_encoder
->hot_plug
)
716 intel_encoder
->hot_plug(intel_encoder
);
717 if (intel_hpd_irq_event(dev
, connector
))
721 mutex_unlock(&mode_config
->mutex
);
724 drm_kms_helper_hotplug_event(dev
);
727 static void ironlake_rps_change_irq_handler(struct drm_device
*dev
)
729 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
730 u32 busy_up
, busy_down
, max_avg
, min_avg
;
733 spin_lock(&mchdev_lock
);
735 I915_WRITE16(MEMINTRSTS
, I915_READ(MEMINTRSTS
));
737 new_delay
= dev_priv
->ips
.cur_delay
;
739 I915_WRITE16(MEMINTRSTS
, MEMINT_EVAL_CHG
);
740 busy_up
= I915_READ(RCPREVBSYTUPAVG
);
741 busy_down
= I915_READ(RCPREVBSYTDNAVG
);
742 max_avg
= I915_READ(RCBMAXAVG
);
743 min_avg
= I915_READ(RCBMINAVG
);
745 /* Handle RCS change request from hw */
746 if (busy_up
> max_avg
) {
747 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.max_delay
)
748 new_delay
= dev_priv
->ips
.cur_delay
- 1;
749 if (new_delay
< dev_priv
->ips
.max_delay
)
750 new_delay
= dev_priv
->ips
.max_delay
;
751 } else if (busy_down
< min_avg
) {
752 if (dev_priv
->ips
.cur_delay
!= dev_priv
->ips
.min_delay
)
753 new_delay
= dev_priv
->ips
.cur_delay
+ 1;
754 if (new_delay
> dev_priv
->ips
.min_delay
)
755 new_delay
= dev_priv
->ips
.min_delay
;
758 if (ironlake_set_drps(dev
, new_delay
))
759 dev_priv
->ips
.cur_delay
= new_delay
;
761 spin_unlock(&mchdev_lock
);
766 static void notify_ring(struct drm_device
*dev
,
767 struct intel_ring_buffer
*ring
)
769 if (ring
->obj
== NULL
)
772 trace_i915_gem_request_complete(ring
, ring
->get_seqno(ring
, false));
774 wake_up_all(&ring
->irq_queue
);
775 i915_queue_hangcheck(dev
);
778 static void gen6_pm_rps_work(struct work_struct
*work
)
780 drm_i915_private_t
*dev_priv
= container_of(work
, drm_i915_private_t
,
785 spin_lock_irq(&dev_priv
->irq_lock
);
786 pm_iir
= dev_priv
->rps
.pm_iir
;
787 dev_priv
->rps
.pm_iir
= 0;
788 /* Make sure not to corrupt PMIMR state used by ringbuffer code */
789 snb_enable_pm_irq(dev_priv
, GEN6_PM_RPS_EVENTS
);
790 spin_unlock_irq(&dev_priv
->irq_lock
);
792 /* Make sure we didn't queue anything we're not going to process. */
793 WARN_ON(pm_iir
& ~GEN6_PM_RPS_EVENTS
);
795 if ((pm_iir
& GEN6_PM_RPS_EVENTS
) == 0)
798 mutex_lock(&dev_priv
->rps
.hw_lock
);
800 if (pm_iir
& GEN6_PM_RP_UP_THRESHOLD
) {
801 new_delay
= dev_priv
->rps
.cur_delay
+ 1;
804 * For better performance, jump directly
805 * to RPe if we're below it.
807 if (IS_VALLEYVIEW(dev_priv
->dev
) &&
808 dev_priv
->rps
.cur_delay
< dev_priv
->rps
.rpe_delay
)
809 new_delay
= dev_priv
->rps
.rpe_delay
;
811 new_delay
= dev_priv
->rps
.cur_delay
- 1;
813 /* sysfs frequency interfaces may have snuck in while servicing the
816 if (new_delay
>= dev_priv
->rps
.min_delay
&&
817 new_delay
<= dev_priv
->rps
.max_delay
) {
818 if (IS_VALLEYVIEW(dev_priv
->dev
))
819 valleyview_set_rps(dev_priv
->dev
, new_delay
);
821 gen6_set_rps(dev_priv
->dev
, new_delay
);
824 if (IS_VALLEYVIEW(dev_priv
->dev
)) {
826 * On VLV, when we enter RC6 we may not be at the minimum
827 * voltage level, so arm a timer to check. It should only
828 * fire when there's activity or once after we've entered
829 * RC6, and then won't be re-armed until the next RPS interrupt.
831 mod_delayed_work(dev_priv
->wq
, &dev_priv
->rps
.vlv_work
,
832 msecs_to_jiffies(100));
835 mutex_unlock(&dev_priv
->rps
.hw_lock
);
840 * ivybridge_parity_work - Workqueue called when a parity error interrupt
842 * @work: workqueue struct
844 * Doesn't actually do anything except notify userspace. As a consequence of
845 * this event, userspace should try to remap the bad rows since statistically
846 * it is likely the same row is more likely to go bad again.
848 static void ivybridge_parity_work(struct work_struct
*work
)
850 drm_i915_private_t
*dev_priv
= container_of(work
, drm_i915_private_t
,
851 l3_parity
.error_work
);
852 u32 error_status
, row
, bank
, subbank
;
853 char *parity_event
[5];
857 /* We must turn off DOP level clock gating to access the L3 registers.
858 * In order to prevent a get/put style interface, acquire struct mutex
859 * any time we access those registers.
861 mutex_lock(&dev_priv
->dev
->struct_mutex
);
863 misccpctl
= I915_READ(GEN7_MISCCPCTL
);
864 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
& ~GEN7_DOP_CLOCK_GATE_ENABLE
);
865 POSTING_READ(GEN7_MISCCPCTL
);
867 error_status
= I915_READ(GEN7_L3CDERRST1
);
868 row
= GEN7_PARITY_ERROR_ROW(error_status
);
869 bank
= GEN7_PARITY_ERROR_BANK(error_status
);
870 subbank
= GEN7_PARITY_ERROR_SUBBANK(error_status
);
872 I915_WRITE(GEN7_L3CDERRST1
, GEN7_PARITY_ERROR_VALID
|
873 GEN7_L3CDERRST1_ENABLE
);
874 POSTING_READ(GEN7_L3CDERRST1
);
876 I915_WRITE(GEN7_MISCCPCTL
, misccpctl
);
878 spin_lock_irqsave(&dev_priv
->irq_lock
, flags
);
879 ilk_enable_gt_irq(dev_priv
, GT_RENDER_L3_PARITY_ERROR_INTERRUPT
);
880 spin_unlock_irqrestore(&dev_priv
->irq_lock
, flags
);
882 mutex_unlock(&dev_priv
->dev
->struct_mutex
);
884 parity_event
[0] = I915_L3_PARITY_UEVENT
"=1";
885 parity_event
[1] = kasprintf(GFP_KERNEL
, "ROW=%d", row
);
886 parity_event
[2] = kasprintf(GFP_KERNEL
, "BANK=%d", bank
);
887 parity_event
[3] = kasprintf(GFP_KERNEL
, "SUBBANK=%d", subbank
);
888 parity_event
[4] = NULL
;
890 kobject_uevent_env(&dev_priv
->dev
->primary
->kdev
.kobj
,
891 KOBJ_CHANGE
, parity_event
);
893 DRM_DEBUG("Parity error: Row = %d, Bank = %d, Sub bank = %d.\n",
896 kfree(parity_event
[3]);
897 kfree(parity_event
[2]);
898 kfree(parity_event
[1]);
901 static void ivybridge_parity_error_irq_handler(struct drm_device
*dev
)
903 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
905 if (!HAS_L3_GPU_CACHE(dev
))
908 spin_lock(&dev_priv
->irq_lock
);
909 ilk_disable_gt_irq(dev_priv
, GT_RENDER_L3_PARITY_ERROR_INTERRUPT
);
910 spin_unlock(&dev_priv
->irq_lock
);
912 queue_work(dev_priv
->wq
, &dev_priv
->l3_parity
.error_work
);
915 static void ilk_gt_irq_handler(struct drm_device
*dev
,
916 struct drm_i915_private
*dev_priv
,
920 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
921 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
922 if (gt_iir
& ILK_BSD_USER_INTERRUPT
)
923 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
926 static void snb_gt_irq_handler(struct drm_device
*dev
,
927 struct drm_i915_private
*dev_priv
,
932 (GT_RENDER_USER_INTERRUPT
| GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
))
933 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
934 if (gt_iir
& GT_BSD_USER_INTERRUPT
)
935 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
936 if (gt_iir
& GT_BLT_USER_INTERRUPT
)
937 notify_ring(dev
, &dev_priv
->ring
[BCS
]);
939 if (gt_iir
& (GT_BLT_CS_ERROR_INTERRUPT
|
940 GT_BSD_CS_ERROR_INTERRUPT
|
941 GT_RENDER_CS_MASTER_ERROR_INTERRUPT
)) {
942 DRM_ERROR("GT error interrupt 0x%08x\n", gt_iir
);
943 i915_handle_error(dev
, false);
946 if (gt_iir
& GT_RENDER_L3_PARITY_ERROR_INTERRUPT
)
947 ivybridge_parity_error_irq_handler(dev
);
950 /* Legacy way of handling PM interrupts */
951 static void gen6_rps_irq_handler(struct drm_i915_private
*dev_priv
,
955 * IIR bits should never already be set because IMR should
956 * prevent an interrupt from being shown in IIR. The warning
957 * displays a case where we've unsafely cleared
958 * dev_priv->rps.pm_iir. Although missing an interrupt of the same
959 * type is not a problem, it displays a problem in the logic.
961 * The mask bit in IMR is cleared by dev_priv->rps.work.
964 spin_lock(&dev_priv
->irq_lock
);
965 dev_priv
->rps
.pm_iir
|= pm_iir
& GEN6_PM_RPS_EVENTS
;
966 snb_set_pm_irq(dev_priv
, dev_priv
->rps
.pm_iir
);
967 spin_unlock(&dev_priv
->irq_lock
);
969 queue_work(dev_priv
->wq
, &dev_priv
->rps
.work
);
972 #define HPD_STORM_DETECT_PERIOD 1000
973 #define HPD_STORM_THRESHOLD 5
975 static inline void intel_hpd_irq_handler(struct drm_device
*dev
,
979 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
981 bool storm_detected
= false;
983 if (!hotplug_trigger
)
986 spin_lock(&dev_priv
->irq_lock
);
987 for (i
= 1; i
< HPD_NUM_PINS
; i
++) {
989 WARN(((hpd
[i
] & hotplug_trigger
) &&
990 dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_ENABLED
),
991 "Received HPD interrupt although disabled\n");
993 if (!(hpd
[i
] & hotplug_trigger
) ||
994 dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_ENABLED
)
997 dev_priv
->hpd_event_bits
|= (1 << i
);
998 if (!time_in_range(jiffies
, dev_priv
->hpd_stats
[i
].hpd_last_jiffies
,
999 dev_priv
->hpd_stats
[i
].hpd_last_jiffies
1000 + msecs_to_jiffies(HPD_STORM_DETECT_PERIOD
))) {
1001 dev_priv
->hpd_stats
[i
].hpd_last_jiffies
= jiffies
;
1002 dev_priv
->hpd_stats
[i
].hpd_cnt
= 0;
1003 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: 0\n", i
);
1004 } else if (dev_priv
->hpd_stats
[i
].hpd_cnt
> HPD_STORM_THRESHOLD
) {
1005 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_MARK_DISABLED
;
1006 dev_priv
->hpd_event_bits
&= ~(1 << i
);
1007 DRM_DEBUG_KMS("HPD interrupt storm detected on PIN %d\n", i
);
1008 storm_detected
= true;
1010 dev_priv
->hpd_stats
[i
].hpd_cnt
++;
1011 DRM_DEBUG_KMS("Received HPD interrupt on PIN %d - cnt: %d\n", i
,
1012 dev_priv
->hpd_stats
[i
].hpd_cnt
);
1017 dev_priv
->display
.hpd_irq_setup(dev
);
1018 spin_unlock(&dev_priv
->irq_lock
);
1020 queue_work(dev_priv
->wq
,
1021 &dev_priv
->hotplug_work
);
1024 static void gmbus_irq_handler(struct drm_device
*dev
)
1026 struct drm_i915_private
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1028 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1031 static void dp_aux_irq_handler(struct drm_device
*dev
)
1033 struct drm_i915_private
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1035 wake_up_all(&dev_priv
->gmbus_wait_queue
);
1038 /* Unlike gen6_rps_irq_handler() from which this function is originally derived,
1039 * we must be able to deal with other PM interrupts. This is complicated because
1040 * of the way in which we use the masks to defer the RPS work (which for
1041 * posterity is necessary because of forcewake).
1043 static void hsw_pm_irq_handler(struct drm_i915_private
*dev_priv
,
1046 if (pm_iir
& GEN6_PM_RPS_EVENTS
) {
1047 spin_lock(&dev_priv
->irq_lock
);
1048 dev_priv
->rps
.pm_iir
|= pm_iir
& GEN6_PM_RPS_EVENTS
;
1049 snb_set_pm_irq(dev_priv
, dev_priv
->rps
.pm_iir
);
1050 /* never want to mask useful interrupts. */
1051 WARN_ON(I915_READ_NOTRACE(GEN6_PMIMR
) & ~GEN6_PM_RPS_EVENTS
);
1052 spin_unlock(&dev_priv
->irq_lock
);
1054 queue_work(dev_priv
->wq
, &dev_priv
->rps
.work
);
1057 if (pm_iir
& PM_VEBOX_USER_INTERRUPT
)
1058 notify_ring(dev_priv
->dev
, &dev_priv
->ring
[VECS
]);
1060 if (pm_iir
& PM_VEBOX_CS_ERROR_INTERRUPT
) {
1061 DRM_ERROR("VEBOX CS error interrupt 0x%08x\n", pm_iir
);
1062 i915_handle_error(dev_priv
->dev
, false);
1066 static irqreturn_t
valleyview_irq_handler(int irq
, void *arg
)
1068 struct drm_device
*dev
= (struct drm_device
*) arg
;
1069 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1070 u32 iir
, gt_iir
, pm_iir
;
1071 irqreturn_t ret
= IRQ_NONE
;
1072 unsigned long irqflags
;
1074 u32 pipe_stats
[I915_MAX_PIPES
];
1076 atomic_inc(&dev_priv
->irq_received
);
1079 iir
= I915_READ(VLV_IIR
);
1080 gt_iir
= I915_READ(GTIIR
);
1081 pm_iir
= I915_READ(GEN6_PMIIR
);
1083 if (gt_iir
== 0 && pm_iir
== 0 && iir
== 0)
1088 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
1090 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1091 for_each_pipe(pipe
) {
1092 int reg
= PIPESTAT(pipe
);
1093 pipe_stats
[pipe
] = I915_READ(reg
);
1096 * Clear the PIPE*STAT regs before the IIR
1098 if (pipe_stats
[pipe
] & 0x8000ffff) {
1099 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
1100 DRM_DEBUG_DRIVER("pipe %c underrun\n",
1102 I915_WRITE(reg
, pipe_stats
[pipe
]);
1105 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1107 for_each_pipe(pipe
) {
1108 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
)
1109 drm_handle_vblank(dev
, pipe
);
1111 if (pipe_stats
[pipe
] & PLANE_FLIPDONE_INT_STATUS_VLV
) {
1112 intel_prepare_page_flip(dev
, pipe
);
1113 intel_finish_page_flip(dev
, pipe
);
1117 /* Consume port. Then clear IIR or we'll miss events */
1118 if (iir
& I915_DISPLAY_PORT_INTERRUPT
) {
1119 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
1120 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_I915
;
1122 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
1125 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_status_i915
);
1127 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
1128 I915_READ(PORT_HOTPLUG_STAT
);
1131 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
1132 gmbus_irq_handler(dev
);
1135 gen6_rps_irq_handler(dev_priv
, pm_iir
);
1137 I915_WRITE(GTIIR
, gt_iir
);
1138 I915_WRITE(GEN6_PMIIR
, pm_iir
);
1139 I915_WRITE(VLV_IIR
, iir
);
1146 static void ibx_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
1148 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1150 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK
;
1152 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_ibx
);
1154 if (pch_iir
& SDE_AUDIO_POWER_MASK
) {
1155 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK
) >>
1156 SDE_AUDIO_POWER_SHIFT
);
1157 DRM_DEBUG_DRIVER("PCH audio power change on port %d\n",
1161 if (pch_iir
& SDE_AUX_MASK
)
1162 dp_aux_irq_handler(dev
);
1164 if (pch_iir
& SDE_GMBUS
)
1165 gmbus_irq_handler(dev
);
1167 if (pch_iir
& SDE_AUDIO_HDCP_MASK
)
1168 DRM_DEBUG_DRIVER("PCH HDCP audio interrupt\n");
1170 if (pch_iir
& SDE_AUDIO_TRANS_MASK
)
1171 DRM_DEBUG_DRIVER("PCH transcoder audio interrupt\n");
1173 if (pch_iir
& SDE_POISON
)
1174 DRM_ERROR("PCH poison interrupt\n");
1176 if (pch_iir
& SDE_FDI_MASK
)
1178 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1180 I915_READ(FDI_RX_IIR(pipe
)));
1182 if (pch_iir
& (SDE_TRANSB_CRC_DONE
| SDE_TRANSA_CRC_DONE
))
1183 DRM_DEBUG_DRIVER("PCH transcoder CRC done interrupt\n");
1185 if (pch_iir
& (SDE_TRANSB_CRC_ERR
| SDE_TRANSA_CRC_ERR
))
1186 DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
1188 if (pch_iir
& SDE_TRANSA_FIFO_UNDER
)
1189 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_A
,
1191 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1193 if (pch_iir
& SDE_TRANSB_FIFO_UNDER
)
1194 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_B
,
1196 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1199 static void ivb_err_int_handler(struct drm_device
*dev
)
1201 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1202 u32 err_int
= I915_READ(GEN7_ERR_INT
);
1204 if (err_int
& ERR_INT_POISON
)
1205 DRM_ERROR("Poison interrupt\n");
1207 if (err_int
& ERR_INT_FIFO_UNDERRUN_A
)
1208 if (intel_set_cpu_fifo_underrun_reporting(dev
, PIPE_A
, false))
1209 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1211 if (err_int
& ERR_INT_FIFO_UNDERRUN_B
)
1212 if (intel_set_cpu_fifo_underrun_reporting(dev
, PIPE_B
, false))
1213 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1215 if (err_int
& ERR_INT_FIFO_UNDERRUN_C
)
1216 if (intel_set_cpu_fifo_underrun_reporting(dev
, PIPE_C
, false))
1217 DRM_DEBUG_DRIVER("Pipe C FIFO underrun\n");
1219 I915_WRITE(GEN7_ERR_INT
, err_int
);
1222 static void cpt_serr_int_handler(struct drm_device
*dev
)
1224 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1225 u32 serr_int
= I915_READ(SERR_INT
);
1227 if (serr_int
& SERR_INT_POISON
)
1228 DRM_ERROR("PCH poison interrupt\n");
1230 if (serr_int
& SERR_INT_TRANS_A_FIFO_UNDERRUN
)
1231 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_A
,
1233 DRM_DEBUG_DRIVER("PCH transcoder A FIFO underrun\n");
1235 if (serr_int
& SERR_INT_TRANS_B_FIFO_UNDERRUN
)
1236 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_B
,
1238 DRM_DEBUG_DRIVER("PCH transcoder B FIFO underrun\n");
1240 if (serr_int
& SERR_INT_TRANS_C_FIFO_UNDERRUN
)
1241 if (intel_set_pch_fifo_underrun_reporting(dev
, TRANSCODER_C
,
1243 DRM_DEBUG_DRIVER("PCH transcoder C FIFO underrun\n");
1245 I915_WRITE(SERR_INT
, serr_int
);
1248 static void cpt_irq_handler(struct drm_device
*dev
, u32 pch_iir
)
1250 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1252 u32 hotplug_trigger
= pch_iir
& SDE_HOTPLUG_MASK_CPT
;
1254 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_cpt
);
1256 if (pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) {
1257 int port
= ffs((pch_iir
& SDE_AUDIO_POWER_MASK_CPT
) >>
1258 SDE_AUDIO_POWER_SHIFT_CPT
);
1259 DRM_DEBUG_DRIVER("PCH audio power change on port %c\n",
1263 if (pch_iir
& SDE_AUX_MASK_CPT
)
1264 dp_aux_irq_handler(dev
);
1266 if (pch_iir
& SDE_GMBUS_CPT
)
1267 gmbus_irq_handler(dev
);
1269 if (pch_iir
& SDE_AUDIO_CP_REQ_CPT
)
1270 DRM_DEBUG_DRIVER("Audio CP request interrupt\n");
1272 if (pch_iir
& SDE_AUDIO_CP_CHG_CPT
)
1273 DRM_DEBUG_DRIVER("Audio CP change interrupt\n");
1275 if (pch_iir
& SDE_FDI_MASK_CPT
)
1277 DRM_DEBUG_DRIVER(" pipe %c FDI IIR: 0x%08x\n",
1279 I915_READ(FDI_RX_IIR(pipe
)));
1281 if (pch_iir
& SDE_ERROR_CPT
)
1282 cpt_serr_int_handler(dev
);
1285 static void ilk_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
1287 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1289 if (de_iir
& DE_AUX_CHANNEL_A
)
1290 dp_aux_irq_handler(dev
);
1292 if (de_iir
& DE_GSE
)
1293 intel_opregion_asle_intr(dev
);
1295 if (de_iir
& DE_PIPEA_VBLANK
)
1296 drm_handle_vblank(dev
, 0);
1298 if (de_iir
& DE_PIPEB_VBLANK
)
1299 drm_handle_vblank(dev
, 1);
1301 if (de_iir
& DE_POISON
)
1302 DRM_ERROR("Poison interrupt\n");
1304 if (de_iir
& DE_PIPEA_FIFO_UNDERRUN
)
1305 if (intel_set_cpu_fifo_underrun_reporting(dev
, PIPE_A
, false))
1306 DRM_DEBUG_DRIVER("Pipe A FIFO underrun\n");
1308 if (de_iir
& DE_PIPEB_FIFO_UNDERRUN
)
1309 if (intel_set_cpu_fifo_underrun_reporting(dev
, PIPE_B
, false))
1310 DRM_DEBUG_DRIVER("Pipe B FIFO underrun\n");
1312 if (de_iir
& DE_PLANEA_FLIP_DONE
) {
1313 intel_prepare_page_flip(dev
, 0);
1314 intel_finish_page_flip_plane(dev
, 0);
1317 if (de_iir
& DE_PLANEB_FLIP_DONE
) {
1318 intel_prepare_page_flip(dev
, 1);
1319 intel_finish_page_flip_plane(dev
, 1);
1322 /* check event from PCH */
1323 if (de_iir
& DE_PCH_EVENT
) {
1324 u32 pch_iir
= I915_READ(SDEIIR
);
1326 if (HAS_PCH_CPT(dev
))
1327 cpt_irq_handler(dev
, pch_iir
);
1329 ibx_irq_handler(dev
, pch_iir
);
1331 /* should clear PCH hotplug event before clear CPU irq */
1332 I915_WRITE(SDEIIR
, pch_iir
);
1335 if (IS_GEN5(dev
) && de_iir
& DE_PCU_EVENT
)
1336 ironlake_rps_change_irq_handler(dev
);
1339 static void ivb_display_irq_handler(struct drm_device
*dev
, u32 de_iir
)
1341 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1344 if (de_iir
& DE_ERR_INT_IVB
)
1345 ivb_err_int_handler(dev
);
1347 if (de_iir
& DE_AUX_CHANNEL_A_IVB
)
1348 dp_aux_irq_handler(dev
);
1350 if (de_iir
& DE_GSE_IVB
)
1351 intel_opregion_asle_intr(dev
);
1353 for (i
= 0; i
< 3; i
++) {
1354 if (de_iir
& (DE_PIPEA_VBLANK_IVB
<< (5 * i
)))
1355 drm_handle_vblank(dev
, i
);
1356 if (de_iir
& (DE_PLANEA_FLIP_DONE_IVB
<< (5 * i
))) {
1357 intel_prepare_page_flip(dev
, i
);
1358 intel_finish_page_flip_plane(dev
, i
);
1362 /* check event from PCH */
1363 if (!HAS_PCH_NOP(dev
) && (de_iir
& DE_PCH_EVENT_IVB
)) {
1364 u32 pch_iir
= I915_READ(SDEIIR
);
1366 cpt_irq_handler(dev
, pch_iir
);
1368 /* clear PCH hotplug event before clear CPU irq */
1369 I915_WRITE(SDEIIR
, pch_iir
);
1373 static irqreturn_t
ironlake_irq_handler(int irq
, void *arg
)
1375 struct drm_device
*dev
= (struct drm_device
*) arg
;
1376 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1377 u32 de_iir
, gt_iir
, de_ier
, sde_ier
= 0;
1378 irqreturn_t ret
= IRQ_NONE
;
1379 bool err_int_reenable
= false;
1381 atomic_inc(&dev_priv
->irq_received
);
1383 /* We get interrupts on unclaimed registers, so check for this before we
1384 * do any I915_{READ,WRITE}. */
1385 intel_uncore_check_errors(dev
);
1387 /* disable master interrupt before clearing iir */
1388 de_ier
= I915_READ(DEIER
);
1389 I915_WRITE(DEIER
, de_ier
& ~DE_MASTER_IRQ_CONTROL
);
1390 POSTING_READ(DEIER
);
1392 /* Disable south interrupts. We'll only write to SDEIIR once, so further
1393 * interrupts will will be stored on its back queue, and then we'll be
1394 * able to process them after we restore SDEIER (as soon as we restore
1395 * it, we'll get an interrupt if SDEIIR still has something to process
1396 * due to its back queue). */
1397 if (!HAS_PCH_NOP(dev
)) {
1398 sde_ier
= I915_READ(SDEIER
);
1399 I915_WRITE(SDEIER
, 0);
1400 POSTING_READ(SDEIER
);
1403 /* On Haswell, also mask ERR_INT because we don't want to risk
1404 * generating "unclaimed register" interrupts from inside the interrupt
1406 if (IS_HASWELL(dev
)) {
1407 spin_lock(&dev_priv
->irq_lock
);
1408 err_int_reenable
= ~dev_priv
->irq_mask
& DE_ERR_INT_IVB
;
1409 if (err_int_reenable
)
1410 ironlake_disable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
1411 spin_unlock(&dev_priv
->irq_lock
);
1414 gt_iir
= I915_READ(GTIIR
);
1416 if (INTEL_INFO(dev
)->gen
>= 6)
1417 snb_gt_irq_handler(dev
, dev_priv
, gt_iir
);
1419 ilk_gt_irq_handler(dev
, dev_priv
, gt_iir
);
1420 I915_WRITE(GTIIR
, gt_iir
);
1424 de_iir
= I915_READ(DEIIR
);
1426 if (INTEL_INFO(dev
)->gen
>= 7)
1427 ivb_display_irq_handler(dev
, de_iir
);
1429 ilk_display_irq_handler(dev
, de_iir
);
1430 I915_WRITE(DEIIR
, de_iir
);
1434 if (INTEL_INFO(dev
)->gen
>= 6) {
1435 u32 pm_iir
= I915_READ(GEN6_PMIIR
);
1437 if (IS_HASWELL(dev
))
1438 hsw_pm_irq_handler(dev_priv
, pm_iir
);
1440 gen6_rps_irq_handler(dev_priv
, pm_iir
);
1441 I915_WRITE(GEN6_PMIIR
, pm_iir
);
1446 if (err_int_reenable
) {
1447 spin_lock(&dev_priv
->irq_lock
);
1448 if (ivb_can_enable_err_int(dev
))
1449 ironlake_enable_display_irq(dev_priv
, DE_ERR_INT_IVB
);
1450 spin_unlock(&dev_priv
->irq_lock
);
1453 I915_WRITE(DEIER
, de_ier
);
1454 POSTING_READ(DEIER
);
1455 if (!HAS_PCH_NOP(dev
)) {
1456 I915_WRITE(SDEIER
, sde_ier
);
1457 POSTING_READ(SDEIER
);
1464 * i915_error_work_func - do process context error handling work
1465 * @work: work struct
1467 * Fire an error uevent so userspace can see that a hang or error
1470 static void i915_error_work_func(struct work_struct
*work
)
1472 struct i915_gpu_error
*error
= container_of(work
, struct i915_gpu_error
,
1474 drm_i915_private_t
*dev_priv
= container_of(error
, drm_i915_private_t
,
1476 struct drm_device
*dev
= dev_priv
->dev
;
1477 struct intel_ring_buffer
*ring
;
1478 char *error_event
[] = { I915_ERROR_UEVENT
"=1", NULL
};
1479 char *reset_event
[] = { I915_RESET_UEVENT
"=1", NULL
};
1480 char *reset_done_event
[] = { I915_ERROR_UEVENT
"=0", NULL
};
1483 kobject_uevent_env(&dev
->primary
->kdev
.kobj
, KOBJ_CHANGE
, error_event
);
1486 * Note that there's only one work item which does gpu resets, so we
1487 * need not worry about concurrent gpu resets potentially incrementing
1488 * error->reset_counter twice. We only need to take care of another
1489 * racing irq/hangcheck declaring the gpu dead for a second time. A
1490 * quick check for that is good enough: schedule_work ensures the
1491 * correct ordering between hang detection and this work item, and since
1492 * the reset in-progress bit is only ever set by code outside of this
1493 * work we don't need to worry about any other races.
1495 if (i915_reset_in_progress(error
) && !i915_terminally_wedged(error
)) {
1496 DRM_DEBUG_DRIVER("resetting chip\n");
1497 kobject_uevent_env(&dev
->primary
->kdev
.kobj
, KOBJ_CHANGE
,
1500 ret
= i915_reset(dev
);
1504 * After all the gem state is reset, increment the reset
1505 * counter and wake up everyone waiting for the reset to
1508 * Since unlock operations are a one-sided barrier only,
1509 * we need to insert a barrier here to order any seqno
1511 * the counter increment.
1513 smp_mb__before_atomic_inc();
1514 atomic_inc(&dev_priv
->gpu_error
.reset_counter
);
1516 kobject_uevent_env(&dev
->primary
->kdev
.kobj
,
1517 KOBJ_CHANGE
, reset_done_event
);
1519 atomic_set(&error
->reset_counter
, I915_WEDGED
);
1522 for_each_ring(ring
, dev_priv
, i
)
1523 wake_up_all(&ring
->irq_queue
);
1525 intel_display_handle_reset(dev
);
1527 wake_up_all(&dev_priv
->gpu_error
.reset_queue
);
1531 static void i915_report_and_clear_eir(struct drm_device
*dev
)
1533 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1534 uint32_t instdone
[I915_NUM_INSTDONE_REG
];
1535 u32 eir
= I915_READ(EIR
);
1541 pr_err("render error detected, EIR: 0x%08x\n", eir
);
1543 i915_get_extra_instdone(dev
, instdone
);
1546 if (eir
& (GM45_ERROR_MEM_PRIV
| GM45_ERROR_CP_PRIV
)) {
1547 u32 ipeir
= I915_READ(IPEIR_I965
);
1549 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
1550 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
1551 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
1552 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
1553 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
1554 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
1555 I915_WRITE(IPEIR_I965
, ipeir
);
1556 POSTING_READ(IPEIR_I965
);
1558 if (eir
& GM45_ERROR_PAGE_TABLE
) {
1559 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
1560 pr_err("page table error\n");
1561 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
1562 I915_WRITE(PGTBL_ER
, pgtbl_err
);
1563 POSTING_READ(PGTBL_ER
);
1567 if (!IS_GEN2(dev
)) {
1568 if (eir
& I915_ERROR_PAGE_TABLE
) {
1569 u32 pgtbl_err
= I915_READ(PGTBL_ER
);
1570 pr_err("page table error\n");
1571 pr_err(" PGTBL_ER: 0x%08x\n", pgtbl_err
);
1572 I915_WRITE(PGTBL_ER
, pgtbl_err
);
1573 POSTING_READ(PGTBL_ER
);
1577 if (eir
& I915_ERROR_MEMORY_REFRESH
) {
1578 pr_err("memory refresh error:\n");
1580 pr_err("pipe %c stat: 0x%08x\n",
1581 pipe_name(pipe
), I915_READ(PIPESTAT(pipe
)));
1582 /* pipestat has already been acked */
1584 if (eir
& I915_ERROR_INSTRUCTION
) {
1585 pr_err("instruction error\n");
1586 pr_err(" INSTPM: 0x%08x\n", I915_READ(INSTPM
));
1587 for (i
= 0; i
< ARRAY_SIZE(instdone
); i
++)
1588 pr_err(" INSTDONE_%d: 0x%08x\n", i
, instdone
[i
]);
1589 if (INTEL_INFO(dev
)->gen
< 4) {
1590 u32 ipeir
= I915_READ(IPEIR
);
1592 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR
));
1593 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR
));
1594 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD
));
1595 I915_WRITE(IPEIR
, ipeir
);
1596 POSTING_READ(IPEIR
);
1598 u32 ipeir
= I915_READ(IPEIR_I965
);
1600 pr_err(" IPEIR: 0x%08x\n", I915_READ(IPEIR_I965
));
1601 pr_err(" IPEHR: 0x%08x\n", I915_READ(IPEHR_I965
));
1602 pr_err(" INSTPS: 0x%08x\n", I915_READ(INSTPS
));
1603 pr_err(" ACTHD: 0x%08x\n", I915_READ(ACTHD_I965
));
1604 I915_WRITE(IPEIR_I965
, ipeir
);
1605 POSTING_READ(IPEIR_I965
);
1609 I915_WRITE(EIR
, eir
);
1611 eir
= I915_READ(EIR
);
1614 * some errors might have become stuck,
1617 DRM_ERROR("EIR stuck: 0x%08x, masking\n", eir
);
1618 I915_WRITE(EMR
, I915_READ(EMR
) | eir
);
1619 I915_WRITE(IIR
, I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
1624 * i915_handle_error - handle an error interrupt
1627 * Do some basic checking of regsiter state at error interrupt time and
1628 * dump it to the syslog. Also call i915_capture_error_state() to make
1629 * sure we get a record and make it available in debugfs. Fire a uevent
1630 * so userspace knows something bad happened (should trigger collection
1631 * of a ring dump etc.).
1633 void i915_handle_error(struct drm_device
*dev
, bool wedged
)
1635 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1636 struct intel_ring_buffer
*ring
;
1639 i915_capture_error_state(dev
);
1640 i915_report_and_clear_eir(dev
);
1643 atomic_set_mask(I915_RESET_IN_PROGRESS_FLAG
,
1644 &dev_priv
->gpu_error
.reset_counter
);
1647 * Wakeup waiting processes so that the reset work item
1648 * doesn't deadlock trying to grab various locks.
1650 for_each_ring(ring
, dev_priv
, i
)
1651 wake_up_all(&ring
->irq_queue
);
1654 queue_work(dev_priv
->wq
, &dev_priv
->gpu_error
.work
);
1657 static void __always_unused
i915_pageflip_stall_check(struct drm_device
*dev
, int pipe
)
1659 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1660 struct drm_crtc
*crtc
= dev_priv
->pipe_to_crtc_mapping
[pipe
];
1661 struct intel_crtc
*intel_crtc
= to_intel_crtc(crtc
);
1662 struct drm_i915_gem_object
*obj
;
1663 struct intel_unpin_work
*work
;
1664 unsigned long flags
;
1665 bool stall_detected
;
1667 /* Ignore early vblank irqs */
1668 if (intel_crtc
== NULL
)
1671 spin_lock_irqsave(&dev
->event_lock
, flags
);
1672 work
= intel_crtc
->unpin_work
;
1675 atomic_read(&work
->pending
) >= INTEL_FLIP_COMPLETE
||
1676 !work
->enable_stall_check
) {
1677 /* Either the pending flip IRQ arrived, or we're too early. Don't check */
1678 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
1682 /* Potential stall - if we see that the flip has happened, assume a missed interrupt */
1683 obj
= work
->pending_flip_obj
;
1684 if (INTEL_INFO(dev
)->gen
>= 4) {
1685 int dspsurf
= DSPSURF(intel_crtc
->plane
);
1686 stall_detected
= I915_HI_DISPBASE(I915_READ(dspsurf
)) ==
1687 i915_gem_obj_ggtt_offset(obj
);
1689 int dspaddr
= DSPADDR(intel_crtc
->plane
);
1690 stall_detected
= I915_READ(dspaddr
) == (i915_gem_obj_ggtt_offset(obj
) +
1691 crtc
->y
* crtc
->fb
->pitches
[0] +
1692 crtc
->x
* crtc
->fb
->bits_per_pixel
/8);
1695 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
1697 if (stall_detected
) {
1698 DRM_DEBUG_DRIVER("Pageflip stall detected\n");
1699 intel_prepare_page_flip(dev
, intel_crtc
->plane
);
1703 /* Called from drm generic code, passed 'crtc' which
1704 * we use as a pipe index
1706 static int i915_enable_vblank(struct drm_device
*dev
, int pipe
)
1708 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1709 unsigned long irqflags
;
1711 if (!i915_pipe_enabled(dev
, pipe
))
1714 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1715 if (INTEL_INFO(dev
)->gen
>= 4)
1716 i915_enable_pipestat(dev_priv
, pipe
,
1717 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
1719 i915_enable_pipestat(dev_priv
, pipe
,
1720 PIPE_VBLANK_INTERRUPT_ENABLE
);
1722 /* maintain vblank delivery even in deep C-states */
1723 if (dev_priv
->info
->gen
== 3)
1724 I915_WRITE(INSTPM
, _MASKED_BIT_DISABLE(INSTPM_AGPBUSY_DIS
));
1725 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1730 static int ironlake_enable_vblank(struct drm_device
*dev
, int pipe
)
1732 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1733 unsigned long irqflags
;
1734 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
1735 DE_PIPE_VBLANK_ILK(pipe
);
1737 if (!i915_pipe_enabled(dev
, pipe
))
1740 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1741 ironlake_enable_display_irq(dev_priv
, bit
);
1742 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1747 static int valleyview_enable_vblank(struct drm_device
*dev
, int pipe
)
1749 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1750 unsigned long irqflags
;
1753 if (!i915_pipe_enabled(dev
, pipe
))
1756 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1757 imr
= I915_READ(VLV_IMR
);
1759 imr
&= ~I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
;
1761 imr
&= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
1762 I915_WRITE(VLV_IMR
, imr
);
1763 i915_enable_pipestat(dev_priv
, pipe
,
1764 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
1765 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1770 /* Called from drm generic code, passed 'crtc' which
1771 * we use as a pipe index
1773 static void i915_disable_vblank(struct drm_device
*dev
, int pipe
)
1775 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1776 unsigned long irqflags
;
1778 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1779 if (dev_priv
->info
->gen
== 3)
1780 I915_WRITE(INSTPM
, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_DIS
));
1782 i915_disable_pipestat(dev_priv
, pipe
,
1783 PIPE_VBLANK_INTERRUPT_ENABLE
|
1784 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
1785 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1788 static void ironlake_disable_vblank(struct drm_device
*dev
, int pipe
)
1790 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1791 unsigned long irqflags
;
1792 uint32_t bit
= (INTEL_INFO(dev
)->gen
>= 7) ? DE_PIPE_VBLANK_IVB(pipe
) :
1793 DE_PIPE_VBLANK_ILK(pipe
);
1795 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1796 ironlake_disable_display_irq(dev_priv
, bit
);
1797 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1800 static void valleyview_disable_vblank(struct drm_device
*dev
, int pipe
)
1802 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
1803 unsigned long irqflags
;
1806 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
1807 i915_disable_pipestat(dev_priv
, pipe
,
1808 PIPE_START_VBLANK_INTERRUPT_ENABLE
);
1809 imr
= I915_READ(VLV_IMR
);
1811 imr
|= I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
;
1813 imr
|= I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
1814 I915_WRITE(VLV_IMR
, imr
);
1815 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
1819 ring_last_seqno(struct intel_ring_buffer
*ring
)
1821 return list_entry(ring
->request_list
.prev
,
1822 struct drm_i915_gem_request
, list
)->seqno
;
1826 ring_idle(struct intel_ring_buffer
*ring
, u32 seqno
)
1828 return (list_empty(&ring
->request_list
) ||
1829 i915_seqno_passed(seqno
, ring_last_seqno(ring
)));
1832 static struct intel_ring_buffer
*
1833 semaphore_waits_for(struct intel_ring_buffer
*ring
, u32
*seqno
)
1835 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
1836 u32 cmd
, ipehr
, acthd
, acthd_min
;
1838 ipehr
= I915_READ(RING_IPEHR(ring
->mmio_base
));
1839 if ((ipehr
& ~(0x3 << 16)) !=
1840 (MI_SEMAPHORE_MBOX
| MI_SEMAPHORE_COMPARE
| MI_SEMAPHORE_REGISTER
))
1843 /* ACTHD is likely pointing to the dword after the actual command,
1844 * so scan backwards until we find the MBOX.
1846 acthd
= intel_ring_get_active_head(ring
) & HEAD_ADDR
;
1847 acthd_min
= max((int)acthd
- 3 * 4, 0);
1849 cmd
= ioread32(ring
->virtual_start
+ acthd
);
1854 if (acthd
< acthd_min
)
1858 *seqno
= ioread32(ring
->virtual_start
+acthd
+4)+1;
1859 return &dev_priv
->ring
[(ring
->id
+ (((ipehr
>> 17) & 1) + 1)) % 3];
1862 static int semaphore_passed(struct intel_ring_buffer
*ring
)
1864 struct drm_i915_private
*dev_priv
= ring
->dev
->dev_private
;
1865 struct intel_ring_buffer
*signaller
;
1868 ring
->hangcheck
.deadlock
= true;
1870 signaller
= semaphore_waits_for(ring
, &seqno
);
1871 if (signaller
== NULL
|| signaller
->hangcheck
.deadlock
)
1874 /* cursory check for an unkickable deadlock */
1875 ctl
= I915_READ_CTL(signaller
);
1876 if (ctl
& RING_WAIT_SEMAPHORE
&& semaphore_passed(signaller
) < 0)
1879 return i915_seqno_passed(signaller
->get_seqno(signaller
, false), seqno
);
1882 static void semaphore_clear_deadlocks(struct drm_i915_private
*dev_priv
)
1884 struct intel_ring_buffer
*ring
;
1887 for_each_ring(ring
, dev_priv
, i
)
1888 ring
->hangcheck
.deadlock
= false;
1891 static enum intel_ring_hangcheck_action
1892 ring_stuck(struct intel_ring_buffer
*ring
, u32 acthd
)
1894 struct drm_device
*dev
= ring
->dev
;
1895 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
1898 if (ring
->hangcheck
.acthd
!= acthd
)
1899 return HANGCHECK_ACTIVE
;
1902 return HANGCHECK_HUNG
;
1904 /* Is the chip hanging on a WAIT_FOR_EVENT?
1905 * If so we can simply poke the RB_WAIT bit
1906 * and break the hang. This should work on
1907 * all but the second generation chipsets.
1909 tmp
= I915_READ_CTL(ring
);
1910 if (tmp
& RING_WAIT
) {
1911 DRM_ERROR("Kicking stuck wait on %s\n",
1913 I915_WRITE_CTL(ring
, tmp
);
1914 return HANGCHECK_KICK
;
1917 if (INTEL_INFO(dev
)->gen
>= 6 && tmp
& RING_WAIT_SEMAPHORE
) {
1918 switch (semaphore_passed(ring
)) {
1920 return HANGCHECK_HUNG
;
1922 DRM_ERROR("Kicking stuck semaphore on %s\n",
1924 I915_WRITE_CTL(ring
, tmp
);
1925 return HANGCHECK_KICK
;
1927 return HANGCHECK_WAIT
;
1931 return HANGCHECK_HUNG
;
1935 * This is called when the chip hasn't reported back with completed
1936 * batchbuffers in a long time. We keep track per ring seqno progress and
1937 * if there are no progress, hangcheck score for that ring is increased.
1938 * Further, acthd is inspected to see if the ring is stuck. On stuck case
1939 * we kick the ring. If we see no progress on three subsequent calls
1940 * we assume chip is wedged and try to fix it by resetting the chip.
1942 static void i915_hangcheck_elapsed(unsigned long data
)
1944 struct drm_device
*dev
= (struct drm_device
*)data
;
1945 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
1946 struct intel_ring_buffer
*ring
;
1948 int busy_count
= 0, rings_hung
= 0;
1949 bool stuck
[I915_NUM_RINGS
] = { 0 };
1955 if (!i915_enable_hangcheck
)
1958 for_each_ring(ring
, dev_priv
, i
) {
1962 semaphore_clear_deadlocks(dev_priv
);
1964 seqno
= ring
->get_seqno(ring
, false);
1965 acthd
= intel_ring_get_active_head(ring
);
1967 if (ring
->hangcheck
.seqno
== seqno
) {
1968 if (ring_idle(ring
, seqno
)) {
1969 if (waitqueue_active(&ring
->irq_queue
)) {
1970 /* Issue a wake-up to catch stuck h/w. */
1971 DRM_ERROR("Hangcheck timer elapsed... %s idle\n",
1973 wake_up_all(&ring
->irq_queue
);
1974 ring
->hangcheck
.score
+= HUNG
;
1978 /* We always increment the hangcheck score
1979 * if the ring is busy and still processing
1980 * the same request, so that no single request
1981 * can run indefinitely (such as a chain of
1982 * batches). The only time we do not increment
1983 * the hangcheck score on this ring, if this
1984 * ring is in a legitimate wait for another
1985 * ring. In that case the waiting ring is a
1986 * victim and we want to be sure we catch the
1987 * right culprit. Then every time we do kick
1988 * the ring, add a small increment to the
1989 * score so that we can catch a batch that is
1990 * being repeatedly kicked and so responsible
1991 * for stalling the machine.
1993 ring
->hangcheck
.action
= ring_stuck(ring
,
1996 switch (ring
->hangcheck
.action
) {
1997 case HANGCHECK_WAIT
:
1999 case HANGCHECK_ACTIVE
:
2000 ring
->hangcheck
.score
+= BUSY
;
2002 case HANGCHECK_KICK
:
2003 ring
->hangcheck
.score
+= KICK
;
2005 case HANGCHECK_HUNG
:
2006 ring
->hangcheck
.score
+= HUNG
;
2012 /* Gradually reduce the count so that we catch DoS
2013 * attempts across multiple batches.
2015 if (ring
->hangcheck
.score
> 0)
2016 ring
->hangcheck
.score
--;
2019 ring
->hangcheck
.seqno
= seqno
;
2020 ring
->hangcheck
.acthd
= acthd
;
2024 for_each_ring(ring
, dev_priv
, i
) {
2025 if (ring
->hangcheck
.score
> FIRE
) {
2026 DRM_ERROR("%s on %s\n",
2027 stuck
[i
] ? "stuck" : "no progress",
2034 return i915_handle_error(dev
, true);
2037 /* Reset timer case chip hangs without another request
2039 i915_queue_hangcheck(dev
);
2042 void i915_queue_hangcheck(struct drm_device
*dev
)
2044 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2045 if (!i915_enable_hangcheck
)
2048 mod_timer(&dev_priv
->gpu_error
.hangcheck_timer
,
2049 round_jiffies_up(jiffies
+ DRM_I915_HANGCHECK_JIFFIES
));
2052 static void ibx_irq_preinstall(struct drm_device
*dev
)
2054 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2056 if (HAS_PCH_NOP(dev
))
2059 /* south display irq */
2060 I915_WRITE(SDEIMR
, 0xffffffff);
2062 * SDEIER is also touched by the interrupt handler to work around missed
2063 * PCH interrupts. Hence we can't update it after the interrupt handler
2064 * is enabled - instead we unconditionally enable all PCH interrupt
2065 * sources here, but then only unmask them as needed with SDEIMR.
2067 I915_WRITE(SDEIER
, 0xffffffff);
2068 POSTING_READ(SDEIER
);
2071 static void gen5_gt_irq_preinstall(struct drm_device
*dev
)
2073 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2076 I915_WRITE(GTIMR
, 0xffffffff);
2077 I915_WRITE(GTIER
, 0x0);
2078 POSTING_READ(GTIER
);
2080 if (INTEL_INFO(dev
)->gen
>= 6) {
2082 I915_WRITE(GEN6_PMIMR
, 0xffffffff);
2083 I915_WRITE(GEN6_PMIER
, 0x0);
2084 POSTING_READ(GEN6_PMIER
);
2090 static void ironlake_irq_preinstall(struct drm_device
*dev
)
2092 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2094 atomic_set(&dev_priv
->irq_received
, 0);
2096 I915_WRITE(HWSTAM
, 0xeffe);
2098 I915_WRITE(DEIMR
, 0xffffffff);
2099 I915_WRITE(DEIER
, 0x0);
2100 POSTING_READ(DEIER
);
2102 gen5_gt_irq_preinstall(dev
);
2104 ibx_irq_preinstall(dev
);
2107 static void valleyview_irq_preinstall(struct drm_device
*dev
)
2109 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2112 atomic_set(&dev_priv
->irq_received
, 0);
2115 I915_WRITE(VLV_IMR
, 0);
2116 I915_WRITE(RING_IMR(RENDER_RING_BASE
), 0);
2117 I915_WRITE(RING_IMR(GEN6_BSD_RING_BASE
), 0);
2118 I915_WRITE(RING_IMR(BLT_RING_BASE
), 0);
2121 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
2122 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
2124 gen5_gt_irq_preinstall(dev
);
2126 I915_WRITE(DPINVGTT
, 0xff);
2128 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2129 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
2131 I915_WRITE(PIPESTAT(pipe
), 0xffff);
2132 I915_WRITE(VLV_IIR
, 0xffffffff);
2133 I915_WRITE(VLV_IMR
, 0xffffffff);
2134 I915_WRITE(VLV_IER
, 0x0);
2135 POSTING_READ(VLV_IER
);
2138 static void ibx_hpd_irq_setup(struct drm_device
*dev
)
2140 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2141 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
2142 struct intel_encoder
*intel_encoder
;
2143 u32 hotplug_irqs
, hotplug
, enabled_irqs
= 0;
2145 if (HAS_PCH_IBX(dev
)) {
2146 hotplug_irqs
= SDE_HOTPLUG_MASK
;
2147 list_for_each_entry(intel_encoder
, &mode_config
->encoder_list
, base
.head
)
2148 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
2149 enabled_irqs
|= hpd_ibx
[intel_encoder
->hpd_pin
];
2151 hotplug_irqs
= SDE_HOTPLUG_MASK_CPT
;
2152 list_for_each_entry(intel_encoder
, &mode_config
->encoder_list
, base
.head
)
2153 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
2154 enabled_irqs
|= hpd_cpt
[intel_encoder
->hpd_pin
];
2157 ibx_display_interrupt_update(dev_priv
, hotplug_irqs
, enabled_irqs
);
2160 * Enable digital hotplug on the PCH, and configure the DP short pulse
2161 * duration to 2ms (which is the minimum in the Display Port spec)
2163 * This register is the same on all known PCH chips.
2165 hotplug
= I915_READ(PCH_PORT_HOTPLUG
);
2166 hotplug
&= ~(PORTD_PULSE_DURATION_MASK
|PORTC_PULSE_DURATION_MASK
|PORTB_PULSE_DURATION_MASK
);
2167 hotplug
|= PORTD_HOTPLUG_ENABLE
| PORTD_PULSE_DURATION_2ms
;
2168 hotplug
|= PORTC_HOTPLUG_ENABLE
| PORTC_PULSE_DURATION_2ms
;
2169 hotplug
|= PORTB_HOTPLUG_ENABLE
| PORTB_PULSE_DURATION_2ms
;
2170 I915_WRITE(PCH_PORT_HOTPLUG
, hotplug
);
2173 static void ibx_irq_postinstall(struct drm_device
*dev
)
2175 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2178 if (HAS_PCH_NOP(dev
))
2181 if (HAS_PCH_IBX(dev
)) {
2182 mask
= SDE_GMBUS
| SDE_AUX_MASK
| SDE_TRANSB_FIFO_UNDER
|
2183 SDE_TRANSA_FIFO_UNDER
| SDE_POISON
;
2185 mask
= SDE_GMBUS_CPT
| SDE_AUX_MASK_CPT
| SDE_ERROR_CPT
;
2187 I915_WRITE(SERR_INT
, I915_READ(SERR_INT
));
2190 I915_WRITE(SDEIIR
, I915_READ(SDEIIR
));
2191 I915_WRITE(SDEIMR
, ~mask
);
2194 static void gen5_gt_irq_postinstall(struct drm_device
*dev
)
2196 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
2197 u32 pm_irqs
, gt_irqs
;
2199 pm_irqs
= gt_irqs
= 0;
2201 dev_priv
->gt_irq_mask
= ~0;
2202 if (HAS_L3_GPU_CACHE(dev
)) {
2203 /* L3 parity interrupt is always unmasked. */
2204 dev_priv
->gt_irq_mask
= ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT
;
2205 gt_irqs
|= GT_RENDER_L3_PARITY_ERROR_INTERRUPT
;
2208 gt_irqs
|= GT_RENDER_USER_INTERRUPT
;
2210 gt_irqs
|= GT_RENDER_PIPECTL_NOTIFY_INTERRUPT
|
2211 ILK_BSD_USER_INTERRUPT
;
2213 gt_irqs
|= GT_BLT_USER_INTERRUPT
| GT_BSD_USER_INTERRUPT
;
2216 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
2217 I915_WRITE(GTIMR
, dev_priv
->gt_irq_mask
);
2218 I915_WRITE(GTIER
, gt_irqs
);
2219 POSTING_READ(GTIER
);
2221 if (INTEL_INFO(dev
)->gen
>= 6) {
2222 pm_irqs
|= GEN6_PM_RPS_EVENTS
;
2225 pm_irqs
|= PM_VEBOX_USER_INTERRUPT
;
2227 dev_priv
->pm_irq_mask
= 0xffffffff;
2228 I915_WRITE(GEN6_PMIIR
, I915_READ(GEN6_PMIIR
));
2229 I915_WRITE(GEN6_PMIMR
, dev_priv
->pm_irq_mask
);
2230 I915_WRITE(GEN6_PMIER
, pm_irqs
);
2231 POSTING_READ(GEN6_PMIER
);
2235 static int ironlake_irq_postinstall(struct drm_device
*dev
)
2237 unsigned long irqflags
;
2238 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2239 u32 display_mask
, extra_mask
;
2241 if (INTEL_INFO(dev
)->gen
>= 7) {
2242 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE_IVB
|
2243 DE_PCH_EVENT_IVB
| DE_PLANEC_FLIP_DONE_IVB
|
2244 DE_PLANEB_FLIP_DONE_IVB
|
2245 DE_PLANEA_FLIP_DONE_IVB
| DE_AUX_CHANNEL_A_IVB
|
2247 extra_mask
= (DE_PIPEC_VBLANK_IVB
| DE_PIPEB_VBLANK_IVB
|
2248 DE_PIPEA_VBLANK_IVB
);
2250 I915_WRITE(GEN7_ERR_INT
, I915_READ(GEN7_ERR_INT
));
2252 display_mask
= (DE_MASTER_IRQ_CONTROL
| DE_GSE
| DE_PCH_EVENT
|
2253 DE_PLANEA_FLIP_DONE
| DE_PLANEB_FLIP_DONE
|
2254 DE_AUX_CHANNEL_A
| DE_PIPEB_FIFO_UNDERRUN
|
2255 DE_PIPEA_FIFO_UNDERRUN
| DE_POISON
);
2256 extra_mask
= DE_PIPEA_VBLANK
| DE_PIPEB_VBLANK
| DE_PCU_EVENT
;
2259 dev_priv
->irq_mask
= ~display_mask
;
2261 /* should always can generate irq */
2262 I915_WRITE(DEIIR
, I915_READ(DEIIR
));
2263 I915_WRITE(DEIMR
, dev_priv
->irq_mask
);
2264 I915_WRITE(DEIER
, display_mask
| extra_mask
);
2265 POSTING_READ(DEIER
);
2267 gen5_gt_irq_postinstall(dev
);
2269 ibx_irq_postinstall(dev
);
2271 if (IS_IRONLAKE_M(dev
)) {
2272 /* Enable PCU event interrupts
2274 * spinlocking not required here for correctness since interrupt
2275 * setup is guaranteed to run in single-threaded context. But we
2276 * need it to make the assert_spin_locked happy. */
2277 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2278 ironlake_enable_display_irq(dev_priv
, DE_PCU_EVENT
);
2279 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2285 static int valleyview_irq_postinstall(struct drm_device
*dev
)
2287 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2289 u32 pipestat_enable
= PLANE_FLIP_DONE_INT_EN_VLV
;
2290 unsigned long irqflags
;
2292 enable_mask
= I915_DISPLAY_PORT_INTERRUPT
;
2293 enable_mask
|= I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
2294 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
|
2295 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
2296 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
2299 *Leave vblank interrupts masked initially. enable/disable will
2300 * toggle them based on usage.
2302 dev_priv
->irq_mask
= (~enable_mask
) |
2303 I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT
|
2304 I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT
;
2306 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2307 POSTING_READ(PORT_HOTPLUG_EN
);
2309 I915_WRITE(VLV_IMR
, dev_priv
->irq_mask
);
2310 I915_WRITE(VLV_IER
, enable_mask
);
2311 I915_WRITE(VLV_IIR
, 0xffffffff);
2312 I915_WRITE(PIPESTAT(0), 0xffff);
2313 I915_WRITE(PIPESTAT(1), 0xffff);
2314 POSTING_READ(VLV_IER
);
2316 /* Interrupt setup is already guaranteed to be single-threaded, this is
2317 * just to make the assert_spin_locked check happy. */
2318 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2319 i915_enable_pipestat(dev_priv
, 0, pipestat_enable
);
2320 i915_enable_pipestat(dev_priv
, 0, PIPE_GMBUS_EVENT_ENABLE
);
2321 i915_enable_pipestat(dev_priv
, 1, pipestat_enable
);
2322 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2324 I915_WRITE(VLV_IIR
, 0xffffffff);
2325 I915_WRITE(VLV_IIR
, 0xffffffff);
2327 gen5_gt_irq_postinstall(dev
);
2329 /* ack & enable invalid PTE error interrupts */
2330 #if 0 /* FIXME: add support to irq handler for checking these bits */
2331 I915_WRITE(DPINVGTT
, DPINVGTT_STATUS_MASK
);
2332 I915_WRITE(DPINVGTT
, DPINVGTT_EN_MASK
);
2335 I915_WRITE(VLV_MASTER_IER
, MASTER_INTERRUPT_ENABLE
);
2340 static void valleyview_irq_uninstall(struct drm_device
*dev
)
2342 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2348 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
2351 I915_WRITE(PIPESTAT(pipe
), 0xffff);
2353 I915_WRITE(HWSTAM
, 0xffffffff);
2354 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2355 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
2357 I915_WRITE(PIPESTAT(pipe
), 0xffff);
2358 I915_WRITE(VLV_IIR
, 0xffffffff);
2359 I915_WRITE(VLV_IMR
, 0xffffffff);
2360 I915_WRITE(VLV_IER
, 0x0);
2361 POSTING_READ(VLV_IER
);
2364 static void ironlake_irq_uninstall(struct drm_device
*dev
)
2366 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2371 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
2373 I915_WRITE(HWSTAM
, 0xffffffff);
2375 I915_WRITE(DEIMR
, 0xffffffff);
2376 I915_WRITE(DEIER
, 0x0);
2377 I915_WRITE(DEIIR
, I915_READ(DEIIR
));
2379 I915_WRITE(GEN7_ERR_INT
, I915_READ(GEN7_ERR_INT
));
2381 I915_WRITE(GTIMR
, 0xffffffff);
2382 I915_WRITE(GTIER
, 0x0);
2383 I915_WRITE(GTIIR
, I915_READ(GTIIR
));
2385 if (HAS_PCH_NOP(dev
))
2388 I915_WRITE(SDEIMR
, 0xffffffff);
2389 I915_WRITE(SDEIER
, 0x0);
2390 I915_WRITE(SDEIIR
, I915_READ(SDEIIR
));
2391 if (HAS_PCH_CPT(dev
) || HAS_PCH_LPT(dev
))
2392 I915_WRITE(SERR_INT
, I915_READ(SERR_INT
));
2395 static void i8xx_irq_preinstall(struct drm_device
* dev
)
2397 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2400 atomic_set(&dev_priv
->irq_received
, 0);
2403 I915_WRITE(PIPESTAT(pipe
), 0);
2404 I915_WRITE16(IMR
, 0xffff);
2405 I915_WRITE16(IER
, 0x0);
2406 POSTING_READ16(IER
);
2409 static int i8xx_irq_postinstall(struct drm_device
*dev
)
2411 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2414 ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
2416 /* Unmask the interrupts that we always want on. */
2417 dev_priv
->irq_mask
=
2418 ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
2419 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
2420 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
2421 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
2422 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
2423 I915_WRITE16(IMR
, dev_priv
->irq_mask
);
2426 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
2427 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
2428 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
|
2429 I915_USER_INTERRUPT
);
2430 POSTING_READ16(IER
);
2436 * Returns true when a page flip has completed.
2438 static bool i8xx_handle_vblank(struct drm_device
*dev
,
2441 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2442 u16 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(pipe
);
2444 if (!drm_handle_vblank(dev
, pipe
))
2447 if ((iir
& flip_pending
) == 0)
2450 intel_prepare_page_flip(dev
, pipe
);
2452 /* We detect FlipDone by looking for the change in PendingFlip from '1'
2453 * to '0' on the following vblank, i.e. IIR has the Pendingflip
2454 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
2455 * the flip is completed (no longer pending). Since this doesn't raise
2456 * an interrupt per se, we watch for the change at vblank.
2458 if (I915_READ16(ISR
) & flip_pending
)
2461 intel_finish_page_flip(dev
, pipe
);
2466 static irqreturn_t
i8xx_irq_handler(int irq
, void *arg
)
2468 struct drm_device
*dev
= (struct drm_device
*) arg
;
2469 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2472 unsigned long irqflags
;
2475 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
2476 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
2478 atomic_inc(&dev_priv
->irq_received
);
2480 iir
= I915_READ16(IIR
);
2484 while (iir
& ~flip_mask
) {
2485 /* Can't rely on pipestat interrupt bit in iir as it might
2486 * have been cleared after the pipestat interrupt was received.
2487 * It doesn't set the bit in iir again, but it still produces
2488 * interrupts (for non-MSI).
2490 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2491 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
2492 i915_handle_error(dev
, false);
2494 for_each_pipe(pipe
) {
2495 int reg
= PIPESTAT(pipe
);
2496 pipe_stats
[pipe
] = I915_READ(reg
);
2499 * Clear the PIPE*STAT regs before the IIR
2501 if (pipe_stats
[pipe
] & 0x8000ffff) {
2502 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
2503 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2505 I915_WRITE(reg
, pipe_stats
[pipe
]);
2508 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2510 I915_WRITE16(IIR
, iir
& ~flip_mask
);
2511 new_iir
= I915_READ16(IIR
); /* Flush posted writes */
2513 i915_update_dri1_breadcrumb(dev
);
2515 if (iir
& I915_USER_INTERRUPT
)
2516 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
2518 if (pipe_stats
[0] & PIPE_VBLANK_INTERRUPT_STATUS
&&
2519 i8xx_handle_vblank(dev
, 0, iir
))
2520 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(0);
2522 if (pipe_stats
[1] & PIPE_VBLANK_INTERRUPT_STATUS
&&
2523 i8xx_handle_vblank(dev
, 1, iir
))
2524 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(1);
2532 static void i8xx_irq_uninstall(struct drm_device
* dev
)
2534 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2537 for_each_pipe(pipe
) {
2538 /* Clear enable bits; then clear status bits */
2539 I915_WRITE(PIPESTAT(pipe
), 0);
2540 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
2542 I915_WRITE16(IMR
, 0xffff);
2543 I915_WRITE16(IER
, 0x0);
2544 I915_WRITE16(IIR
, I915_READ16(IIR
));
2547 static void i915_irq_preinstall(struct drm_device
* dev
)
2549 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2552 atomic_set(&dev_priv
->irq_received
, 0);
2554 if (I915_HAS_HOTPLUG(dev
)) {
2555 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2556 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
2559 I915_WRITE16(HWSTAM
, 0xeffe);
2561 I915_WRITE(PIPESTAT(pipe
), 0);
2562 I915_WRITE(IMR
, 0xffffffff);
2563 I915_WRITE(IER
, 0x0);
2567 static int i915_irq_postinstall(struct drm_device
*dev
)
2569 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2572 I915_WRITE(EMR
, ~(I915_ERROR_PAGE_TABLE
| I915_ERROR_MEMORY_REFRESH
));
2574 /* Unmask the interrupts that we always want on. */
2575 dev_priv
->irq_mask
=
2576 ~(I915_ASLE_INTERRUPT
|
2577 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
2578 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
2579 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
2580 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
2581 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
2584 I915_ASLE_INTERRUPT
|
2585 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
2586 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
2587 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
|
2588 I915_USER_INTERRUPT
;
2590 if (I915_HAS_HOTPLUG(dev
)) {
2591 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2592 POSTING_READ(PORT_HOTPLUG_EN
);
2594 /* Enable in IER... */
2595 enable_mask
|= I915_DISPLAY_PORT_INTERRUPT
;
2596 /* and unmask in IMR */
2597 dev_priv
->irq_mask
&= ~I915_DISPLAY_PORT_INTERRUPT
;
2600 I915_WRITE(IMR
, dev_priv
->irq_mask
);
2601 I915_WRITE(IER
, enable_mask
);
2604 i915_enable_asle_pipestat(dev
);
2610 * Returns true when a page flip has completed.
2612 static bool i915_handle_vblank(struct drm_device
*dev
,
2613 int plane
, int pipe
, u32 iir
)
2615 drm_i915_private_t
*dev_priv
= dev
->dev_private
;
2616 u32 flip_pending
= DISPLAY_PLANE_FLIP_PENDING(plane
);
2618 if (!drm_handle_vblank(dev
, pipe
))
2621 if ((iir
& flip_pending
) == 0)
2624 intel_prepare_page_flip(dev
, plane
);
2626 /* We detect FlipDone by looking for the change in PendingFlip from '1'
2627 * to '0' on the following vblank, i.e. IIR has the Pendingflip
2628 * asserted following the MI_DISPLAY_FLIP, but ISR is deasserted, hence
2629 * the flip is completed (no longer pending). Since this doesn't raise
2630 * an interrupt per se, we watch for the change at vblank.
2632 if (I915_READ(ISR
) & flip_pending
)
2635 intel_finish_page_flip(dev
, pipe
);
2640 static irqreturn_t
i915_irq_handler(int irq
, void *arg
)
2642 struct drm_device
*dev
= (struct drm_device
*) arg
;
2643 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2644 u32 iir
, new_iir
, pipe_stats
[I915_MAX_PIPES
];
2645 unsigned long irqflags
;
2647 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
2648 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
2649 int pipe
, ret
= IRQ_NONE
;
2651 atomic_inc(&dev_priv
->irq_received
);
2653 iir
= I915_READ(IIR
);
2655 bool irq_received
= (iir
& ~flip_mask
) != 0;
2656 bool blc_event
= false;
2658 /* Can't rely on pipestat interrupt bit in iir as it might
2659 * have been cleared after the pipestat interrupt was received.
2660 * It doesn't set the bit in iir again, but it still produces
2661 * interrupts (for non-MSI).
2663 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2664 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
2665 i915_handle_error(dev
, false);
2667 for_each_pipe(pipe
) {
2668 int reg
= PIPESTAT(pipe
);
2669 pipe_stats
[pipe
] = I915_READ(reg
);
2671 /* Clear the PIPE*STAT regs before the IIR */
2672 if (pipe_stats
[pipe
] & 0x8000ffff) {
2673 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
2674 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2676 I915_WRITE(reg
, pipe_stats
[pipe
]);
2677 irq_received
= true;
2680 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2685 /* Consume port. Then clear IIR or we'll miss events */
2686 if ((I915_HAS_HOTPLUG(dev
)) &&
2687 (iir
& I915_DISPLAY_PORT_INTERRUPT
)) {
2688 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
2689 u32 hotplug_trigger
= hotplug_status
& HOTPLUG_INT_STATUS_I915
;
2691 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2694 intel_hpd_irq_handler(dev
, hotplug_trigger
, hpd_status_i915
);
2696 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
2697 POSTING_READ(PORT_HOTPLUG_STAT
);
2700 I915_WRITE(IIR
, iir
& ~flip_mask
);
2701 new_iir
= I915_READ(IIR
); /* Flush posted writes */
2703 if (iir
& I915_USER_INTERRUPT
)
2704 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
2706 for_each_pipe(pipe
) {
2711 if (pipe_stats
[pipe
] & PIPE_VBLANK_INTERRUPT_STATUS
&&
2712 i915_handle_vblank(dev
, plane
, pipe
, iir
))
2713 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(plane
);
2715 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
2719 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
2720 intel_opregion_asle_intr(dev
);
2722 /* With MSI, interrupts are only generated when iir
2723 * transitions from zero to nonzero. If another bit got
2724 * set while we were handling the existing iir bits, then
2725 * we would never get another interrupt.
2727 * This is fine on non-MSI as well, as if we hit this path
2728 * we avoid exiting the interrupt handler only to generate
2731 * Note that for MSI this could cause a stray interrupt report
2732 * if an interrupt landed in the time between writing IIR and
2733 * the posting read. This should be rare enough to never
2734 * trigger the 99% of 100,000 interrupts test for disabling
2739 } while (iir
& ~flip_mask
);
2741 i915_update_dri1_breadcrumb(dev
);
2746 static void i915_irq_uninstall(struct drm_device
* dev
)
2748 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2751 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
2753 if (I915_HAS_HOTPLUG(dev
)) {
2754 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2755 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
2758 I915_WRITE16(HWSTAM
, 0xffff);
2759 for_each_pipe(pipe
) {
2760 /* Clear enable bits; then clear status bits */
2761 I915_WRITE(PIPESTAT(pipe
), 0);
2762 I915_WRITE(PIPESTAT(pipe
), I915_READ(PIPESTAT(pipe
)));
2764 I915_WRITE(IMR
, 0xffffffff);
2765 I915_WRITE(IER
, 0x0);
2767 I915_WRITE(IIR
, I915_READ(IIR
));
2770 static void i965_irq_preinstall(struct drm_device
* dev
)
2772 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2775 atomic_set(&dev_priv
->irq_received
, 0);
2777 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2778 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
2780 I915_WRITE(HWSTAM
, 0xeffe);
2782 I915_WRITE(PIPESTAT(pipe
), 0);
2783 I915_WRITE(IMR
, 0xffffffff);
2784 I915_WRITE(IER
, 0x0);
2788 static int i965_irq_postinstall(struct drm_device
*dev
)
2790 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2793 unsigned long irqflags
;
2795 /* Unmask the interrupts that we always want on. */
2796 dev_priv
->irq_mask
= ~(I915_ASLE_INTERRUPT
|
2797 I915_DISPLAY_PORT_INTERRUPT
|
2798 I915_DISPLAY_PIPE_A_EVENT_INTERRUPT
|
2799 I915_DISPLAY_PIPE_B_EVENT_INTERRUPT
|
2800 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
2801 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
|
2802 I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
);
2804 enable_mask
= ~dev_priv
->irq_mask
;
2805 enable_mask
&= ~(I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
2806 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
);
2807 enable_mask
|= I915_USER_INTERRUPT
;
2810 enable_mask
|= I915_BSD_USER_INTERRUPT
;
2812 /* Interrupt setup is already guaranteed to be single-threaded, this is
2813 * just to make the assert_spin_locked check happy. */
2814 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2815 i915_enable_pipestat(dev_priv
, 0, PIPE_GMBUS_EVENT_ENABLE
);
2816 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2819 * Enable some error detection, note the instruction error mask
2820 * bit is reserved, so we leave it masked.
2823 error_mask
= ~(GM45_ERROR_PAGE_TABLE
|
2824 GM45_ERROR_MEM_PRIV
|
2825 GM45_ERROR_CP_PRIV
|
2826 I915_ERROR_MEMORY_REFRESH
);
2828 error_mask
= ~(I915_ERROR_PAGE_TABLE
|
2829 I915_ERROR_MEMORY_REFRESH
);
2831 I915_WRITE(EMR
, error_mask
);
2833 I915_WRITE(IMR
, dev_priv
->irq_mask
);
2834 I915_WRITE(IER
, enable_mask
);
2837 I915_WRITE(PORT_HOTPLUG_EN
, 0);
2838 POSTING_READ(PORT_HOTPLUG_EN
);
2840 i915_enable_asle_pipestat(dev
);
2845 static void i915_hpd_irq_setup(struct drm_device
*dev
)
2847 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2848 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
2849 struct intel_encoder
*intel_encoder
;
2852 assert_spin_locked(&dev_priv
->irq_lock
);
2854 if (I915_HAS_HOTPLUG(dev
)) {
2855 hotplug_en
= I915_READ(PORT_HOTPLUG_EN
);
2856 hotplug_en
&= ~HOTPLUG_INT_EN_MASK
;
2857 /* Note HDMI and DP share hotplug bits */
2858 /* enable bits are the same for all generations */
2859 list_for_each_entry(intel_encoder
, &mode_config
->encoder_list
, base
.head
)
2860 if (dev_priv
->hpd_stats
[intel_encoder
->hpd_pin
].hpd_mark
== HPD_ENABLED
)
2861 hotplug_en
|= hpd_mask_i915
[intel_encoder
->hpd_pin
];
2862 /* Programming the CRT detection parameters tends
2863 to generate a spurious hotplug event about three
2864 seconds later. So just do it once.
2867 hotplug_en
|= CRT_HOTPLUG_ACTIVATION_PERIOD_64
;
2868 hotplug_en
&= ~CRT_HOTPLUG_VOLTAGE_COMPARE_MASK
;
2869 hotplug_en
|= CRT_HOTPLUG_VOLTAGE_COMPARE_50
;
2871 /* Ignore TV since it's buggy */
2872 I915_WRITE(PORT_HOTPLUG_EN
, hotplug_en
);
2876 static irqreturn_t
i965_irq_handler(int irq
, void *arg
)
2878 struct drm_device
*dev
= (struct drm_device
*) arg
;
2879 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
2881 u32 pipe_stats
[I915_MAX_PIPES
];
2882 unsigned long irqflags
;
2884 int ret
= IRQ_NONE
, pipe
;
2886 I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT
|
2887 I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT
;
2889 atomic_inc(&dev_priv
->irq_received
);
2891 iir
= I915_READ(IIR
);
2894 bool blc_event
= false;
2896 irq_received
= (iir
& ~flip_mask
) != 0;
2898 /* Can't rely on pipestat interrupt bit in iir as it might
2899 * have been cleared after the pipestat interrupt was received.
2900 * It doesn't set the bit in iir again, but it still produces
2901 * interrupts (for non-MSI).
2903 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
2904 if (iir
& I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT
)
2905 i915_handle_error(dev
, false);
2907 for_each_pipe(pipe
) {
2908 int reg
= PIPESTAT(pipe
);
2909 pipe_stats
[pipe
] = I915_READ(reg
);
2912 * Clear the PIPE*STAT regs before the IIR
2914 if (pipe_stats
[pipe
] & 0x8000ffff) {
2915 if (pipe_stats
[pipe
] & PIPE_FIFO_UNDERRUN_STATUS
)
2916 DRM_DEBUG_DRIVER("pipe %c underrun\n",
2918 I915_WRITE(reg
, pipe_stats
[pipe
]);
2922 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
2929 /* Consume port. Then clear IIR or we'll miss events */
2930 if (iir
& I915_DISPLAY_PORT_INTERRUPT
) {
2931 u32 hotplug_status
= I915_READ(PORT_HOTPLUG_STAT
);
2932 u32 hotplug_trigger
= hotplug_status
& (IS_G4X(dev
) ?
2933 HOTPLUG_INT_STATUS_G4X
:
2934 HOTPLUG_INT_STATUS_I915
);
2936 DRM_DEBUG_DRIVER("hotplug event received, stat 0x%08x\n",
2939 intel_hpd_irq_handler(dev
, hotplug_trigger
,
2940 IS_G4X(dev
) ? hpd_status_gen4
: hpd_status_i915
);
2942 I915_WRITE(PORT_HOTPLUG_STAT
, hotplug_status
);
2943 I915_READ(PORT_HOTPLUG_STAT
);
2946 I915_WRITE(IIR
, iir
& ~flip_mask
);
2947 new_iir
= I915_READ(IIR
); /* Flush posted writes */
2949 if (iir
& I915_USER_INTERRUPT
)
2950 notify_ring(dev
, &dev_priv
->ring
[RCS
]);
2951 if (iir
& I915_BSD_USER_INTERRUPT
)
2952 notify_ring(dev
, &dev_priv
->ring
[VCS
]);
2954 for_each_pipe(pipe
) {
2955 if (pipe_stats
[pipe
] & PIPE_START_VBLANK_INTERRUPT_STATUS
&&
2956 i915_handle_vblank(dev
, pipe
, pipe
, iir
))
2957 flip_mask
&= ~DISPLAY_PLANE_FLIP_PENDING(pipe
);
2959 if (pipe_stats
[pipe
] & PIPE_LEGACY_BLC_EVENT_STATUS
)
2964 if (blc_event
|| (iir
& I915_ASLE_INTERRUPT
))
2965 intel_opregion_asle_intr(dev
);
2967 if (pipe_stats
[0] & PIPE_GMBUS_INTERRUPT_STATUS
)
2968 gmbus_irq_handler(dev
);
2970 /* With MSI, interrupts are only generated when iir
2971 * transitions from zero to nonzero. If another bit got
2972 * set while we were handling the existing iir bits, then
2973 * we would never get another interrupt.
2975 * This is fine on non-MSI as well, as if we hit this path
2976 * we avoid exiting the interrupt handler only to generate
2979 * Note that for MSI this could cause a stray interrupt report
2980 * if an interrupt landed in the time between writing IIR and
2981 * the posting read. This should be rare enough to never
2982 * trigger the 99% of 100,000 interrupts test for disabling
2988 i915_update_dri1_breadcrumb(dev
);
2993 static void i965_irq_uninstall(struct drm_device
* dev
)
2995 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*) dev
->dev_private
;
3001 del_timer_sync(&dev_priv
->hotplug_reenable_timer
);
3003 I915_WRITE(PORT_HOTPLUG_EN
, 0);
3004 I915_WRITE(PORT_HOTPLUG_STAT
, I915_READ(PORT_HOTPLUG_STAT
));
3006 I915_WRITE(HWSTAM
, 0xffffffff);
3008 I915_WRITE(PIPESTAT(pipe
), 0);
3009 I915_WRITE(IMR
, 0xffffffff);
3010 I915_WRITE(IER
, 0x0);
3013 I915_WRITE(PIPESTAT(pipe
),
3014 I915_READ(PIPESTAT(pipe
)) & 0x8000ffff);
3015 I915_WRITE(IIR
, I915_READ(IIR
));
3018 static void i915_reenable_hotplug_timer_func(unsigned long data
)
3020 drm_i915_private_t
*dev_priv
= (drm_i915_private_t
*)data
;
3021 struct drm_device
*dev
= dev_priv
->dev
;
3022 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
3023 unsigned long irqflags
;
3026 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3027 for (i
= (HPD_NONE
+ 1); i
< HPD_NUM_PINS
; i
++) {
3028 struct drm_connector
*connector
;
3030 if (dev_priv
->hpd_stats
[i
].hpd_mark
!= HPD_DISABLED
)
3033 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_ENABLED
;
3035 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
3036 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
3038 if (intel_connector
->encoder
->hpd_pin
== i
) {
3039 if (connector
->polled
!= intel_connector
->polled
)
3040 DRM_DEBUG_DRIVER("Reenabling HPD on connector %s\n",
3041 drm_get_connector_name(connector
));
3042 connector
->polled
= intel_connector
->polled
;
3043 if (!connector
->polled
)
3044 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
3048 if (dev_priv
->display
.hpd_irq_setup
)
3049 dev_priv
->display
.hpd_irq_setup(dev
);
3050 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);
3053 void intel_irq_init(struct drm_device
*dev
)
3055 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3057 INIT_WORK(&dev_priv
->hotplug_work
, i915_hotplug_work_func
);
3058 INIT_WORK(&dev_priv
->gpu_error
.work
, i915_error_work_func
);
3059 INIT_WORK(&dev_priv
->rps
.work
, gen6_pm_rps_work
);
3060 INIT_WORK(&dev_priv
->l3_parity
.error_work
, ivybridge_parity_work
);
3062 setup_timer(&dev_priv
->gpu_error
.hangcheck_timer
,
3063 i915_hangcheck_elapsed
,
3064 (unsigned long) dev
);
3065 setup_timer(&dev_priv
->hotplug_reenable_timer
, i915_reenable_hotplug_timer_func
,
3066 (unsigned long) dev_priv
);
3068 pm_qos_add_request(&dev_priv
->pm_qos
, PM_QOS_CPU_DMA_LATENCY
, PM_QOS_DEFAULT_VALUE
);
3070 dev
->driver
->get_vblank_counter
= i915_get_vblank_counter
;
3071 dev
->max_vblank_count
= 0xffffff; /* only 24 bits of frame count */
3072 if (IS_G4X(dev
) || INTEL_INFO(dev
)->gen
>= 5) {
3073 dev
->max_vblank_count
= 0xffffffff; /* full 32 bit counter */
3074 dev
->driver
->get_vblank_counter
= gm45_get_vblank_counter
;
3077 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
3078 dev
->driver
->get_vblank_timestamp
= i915_get_vblank_timestamp
;
3080 dev
->driver
->get_vblank_timestamp
= NULL
;
3081 dev
->driver
->get_scanout_position
= i915_get_crtc_scanoutpos
;
3083 if (IS_VALLEYVIEW(dev
)) {
3084 dev
->driver
->irq_handler
= valleyview_irq_handler
;
3085 dev
->driver
->irq_preinstall
= valleyview_irq_preinstall
;
3086 dev
->driver
->irq_postinstall
= valleyview_irq_postinstall
;
3087 dev
->driver
->irq_uninstall
= valleyview_irq_uninstall
;
3088 dev
->driver
->enable_vblank
= valleyview_enable_vblank
;
3089 dev
->driver
->disable_vblank
= valleyview_disable_vblank
;
3090 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
3091 } else if (HAS_PCH_SPLIT(dev
)) {
3092 dev
->driver
->irq_handler
= ironlake_irq_handler
;
3093 dev
->driver
->irq_preinstall
= ironlake_irq_preinstall
;
3094 dev
->driver
->irq_postinstall
= ironlake_irq_postinstall
;
3095 dev
->driver
->irq_uninstall
= ironlake_irq_uninstall
;
3096 dev
->driver
->enable_vblank
= ironlake_enable_vblank
;
3097 dev
->driver
->disable_vblank
= ironlake_disable_vblank
;
3098 dev_priv
->display
.hpd_irq_setup
= ibx_hpd_irq_setup
;
3100 if (INTEL_INFO(dev
)->gen
== 2) {
3101 dev
->driver
->irq_preinstall
= i8xx_irq_preinstall
;
3102 dev
->driver
->irq_postinstall
= i8xx_irq_postinstall
;
3103 dev
->driver
->irq_handler
= i8xx_irq_handler
;
3104 dev
->driver
->irq_uninstall
= i8xx_irq_uninstall
;
3105 } else if (INTEL_INFO(dev
)->gen
== 3) {
3106 dev
->driver
->irq_preinstall
= i915_irq_preinstall
;
3107 dev
->driver
->irq_postinstall
= i915_irq_postinstall
;
3108 dev
->driver
->irq_uninstall
= i915_irq_uninstall
;
3109 dev
->driver
->irq_handler
= i915_irq_handler
;
3110 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
3112 dev
->driver
->irq_preinstall
= i965_irq_preinstall
;
3113 dev
->driver
->irq_postinstall
= i965_irq_postinstall
;
3114 dev
->driver
->irq_uninstall
= i965_irq_uninstall
;
3115 dev
->driver
->irq_handler
= i965_irq_handler
;
3116 dev_priv
->display
.hpd_irq_setup
= i915_hpd_irq_setup
;
3118 dev
->driver
->enable_vblank
= i915_enable_vblank
;
3119 dev
->driver
->disable_vblank
= i915_disable_vblank
;
3123 void intel_hpd_init(struct drm_device
*dev
)
3125 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
3126 struct drm_mode_config
*mode_config
= &dev
->mode_config
;
3127 struct drm_connector
*connector
;
3128 unsigned long irqflags
;
3131 for (i
= 1; i
< HPD_NUM_PINS
; i
++) {
3132 dev_priv
->hpd_stats
[i
].hpd_cnt
= 0;
3133 dev_priv
->hpd_stats
[i
].hpd_mark
= HPD_ENABLED
;
3135 list_for_each_entry(connector
, &mode_config
->connector_list
, head
) {
3136 struct intel_connector
*intel_connector
= to_intel_connector(connector
);
3137 connector
->polled
= intel_connector
->polled
;
3138 if (!connector
->polled
&& I915_HAS_HOTPLUG(dev
) && intel_connector
->encoder
->hpd_pin
> HPD_NONE
)
3139 connector
->polled
= DRM_CONNECTOR_POLL_HPD
;
3142 /* Interrupt setup is already guaranteed to be single-threaded, this is
3143 * just to make the assert_spin_locked checks happy. */
3144 spin_lock_irqsave(&dev_priv
->irq_lock
, irqflags
);
3145 if (dev_priv
->display
.hpd_irq_setup
)
3146 dev_priv
->display
.hpd_irq_setup(dev
);
3147 spin_unlock_irqrestore(&dev_priv
->irq_lock
, irqflags
);