5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Created: Fri Mar 19 14:30:16 1999 by faith@valinux.com
12 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14 * All Rights Reserved.
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33 * OTHER DEALINGS IN THE SOFTWARE.
37 #include "drm_trace.h"
39 #include <linux/interrupt.h> /* For task queue support */
40 #include <linux/slab.h>
42 #include <linux/vgaarb.h>
44 * Get interrupt from bus id.
46 * \param inode device inode.
47 * \param file_priv DRM file private.
49 * \param arg user argument, pointing to a drm_irq_busid structure.
50 * \return zero on success or a negative number on failure.
52 * Finds the PCI device with the specified bus id and gets its IRQ number.
53 * This IOCTL is deprecated, and will now return EINVAL for any busid not equal
54 * to that of the device that this DRM instance attached to.
56 int drm_irq_by_busid(struct drm_device
*dev
, void *data
,
57 struct drm_file
*file_priv
)
59 struct drm_irq_busid
*p
= data
;
61 if (drm_core_check_feature(dev
, DRIVER_USE_PLATFORM_DEVICE
))
64 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
67 if ((p
->busnum
>> 8) != drm_get_pci_domain(dev
) ||
68 (p
->busnum
& 0xff) != dev
->pdev
->bus
->number
||
69 p
->devnum
!= PCI_SLOT(dev
->pdev
->devfn
) || p
->funcnum
!= PCI_FUNC(dev
->pdev
->devfn
))
72 p
->irq
= dev
->pdev
->irq
;
74 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p
->busnum
, p
->devnum
, p
->funcnum
,
80 static void vblank_disable_fn(unsigned long arg
)
82 struct drm_device
*dev
= (struct drm_device
*)arg
;
83 unsigned long irqflags
;
86 if (!dev
->vblank_disable_allowed
)
89 for (i
= 0; i
< dev
->num_crtcs
; i
++) {
90 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
91 if (atomic_read(&dev
->vblank_refcount
[i
]) == 0 &&
92 dev
->vblank_enabled
[i
]) {
93 DRM_DEBUG("disabling vblank on crtc %d\n", i
);
95 dev
->driver
->get_vblank_counter(dev
, i
);
96 dev
->driver
->disable_vblank(dev
, i
);
97 dev
->vblank_enabled
[i
] = 0;
99 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
103 void drm_vblank_cleanup(struct drm_device
*dev
)
105 /* Bail if the driver didn't call drm_vblank_init() */
106 if (dev
->num_crtcs
== 0)
109 del_timer(&dev
->vblank_disable_timer
);
111 vblank_disable_fn((unsigned long)dev
);
113 kfree(dev
->vbl_queue
);
114 kfree(dev
->_vblank_count
);
115 kfree(dev
->vblank_refcount
);
116 kfree(dev
->vblank_enabled
);
117 kfree(dev
->last_vblank
);
118 kfree(dev
->last_vblank_wait
);
119 kfree(dev
->vblank_inmodeset
);
123 EXPORT_SYMBOL(drm_vblank_cleanup
);
125 int drm_vblank_init(struct drm_device
*dev
, int num_crtcs
)
127 int i
, ret
= -ENOMEM
;
129 setup_timer(&dev
->vblank_disable_timer
, vblank_disable_fn
,
131 spin_lock_init(&dev
->vbl_lock
);
132 dev
->num_crtcs
= num_crtcs
;
134 dev
->vbl_queue
= kmalloc(sizeof(wait_queue_head_t
) * num_crtcs
,
139 dev
->_vblank_count
= kmalloc(sizeof(atomic_t
) * num_crtcs
, GFP_KERNEL
);
140 if (!dev
->_vblank_count
)
143 dev
->vblank_refcount
= kmalloc(sizeof(atomic_t
) * num_crtcs
,
145 if (!dev
->vblank_refcount
)
148 dev
->vblank_enabled
= kcalloc(num_crtcs
, sizeof(int), GFP_KERNEL
);
149 if (!dev
->vblank_enabled
)
152 dev
->last_vblank
= kcalloc(num_crtcs
, sizeof(u32
), GFP_KERNEL
);
153 if (!dev
->last_vblank
)
156 dev
->last_vblank_wait
= kcalloc(num_crtcs
, sizeof(u32
), GFP_KERNEL
);
157 if (!dev
->last_vblank_wait
)
160 dev
->vblank_inmodeset
= kcalloc(num_crtcs
, sizeof(int), GFP_KERNEL
);
161 if (!dev
->vblank_inmodeset
)
164 /* Zero per-crtc vblank stuff */
165 for (i
= 0; i
< num_crtcs
; i
++) {
166 init_waitqueue_head(&dev
->vbl_queue
[i
]);
167 atomic_set(&dev
->_vblank_count
[i
], 0);
168 atomic_set(&dev
->vblank_refcount
[i
], 0);
171 dev
->vblank_disable_allowed
= 0;
175 drm_vblank_cleanup(dev
);
178 EXPORT_SYMBOL(drm_vblank_init
);
180 static void drm_irq_vgaarb_nokms(void *cookie
, bool state
)
182 struct drm_device
*dev
= cookie
;
184 if (dev
->driver
->vgaarb_irq
) {
185 dev
->driver
->vgaarb_irq(dev
, state
);
189 if (!dev
->irq_enabled
)
193 dev
->driver
->irq_uninstall(dev
);
195 dev
->driver
->irq_preinstall(dev
);
196 dev
->driver
->irq_postinstall(dev
);
201 * Install IRQ handler.
203 * \param dev DRM device.
205 * Initializes the IRQ related data. Installs the handler, calling the driver
206 * \c drm_driver_irq_preinstall() and \c drm_driver_irq_postinstall() functions
207 * before and after the installation.
209 int drm_irq_install(struct drm_device
*dev
)
212 unsigned long sh_flags
= 0;
215 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
218 if (drm_dev_to_irq(dev
) == 0)
221 mutex_lock(&dev
->struct_mutex
);
223 /* Driver must have been initialized */
224 if (!dev
->dev_private
) {
225 mutex_unlock(&dev
->struct_mutex
);
229 if (dev
->irq_enabled
) {
230 mutex_unlock(&dev
->struct_mutex
);
233 dev
->irq_enabled
= 1;
234 mutex_unlock(&dev
->struct_mutex
);
236 DRM_DEBUG("irq=%d\n", drm_dev_to_irq(dev
));
238 /* Before installing handler */
239 dev
->driver
->irq_preinstall(dev
);
241 /* Install handler */
242 if (drm_core_check_feature(dev
, DRIVER_IRQ_SHARED
))
243 sh_flags
= IRQF_SHARED
;
246 irqname
= dev
->devname
;
248 irqname
= dev
->driver
->name
;
250 ret
= request_irq(drm_dev_to_irq(dev
), dev
->driver
->irq_handler
,
251 sh_flags
, irqname
, dev
);
254 mutex_lock(&dev
->struct_mutex
);
255 dev
->irq_enabled
= 0;
256 mutex_unlock(&dev
->struct_mutex
);
260 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
261 vga_client_register(dev
->pdev
, (void *)dev
, drm_irq_vgaarb_nokms
, NULL
);
263 /* After installing handler */
264 ret
= dev
->driver
->irq_postinstall(dev
);
266 mutex_lock(&dev
->struct_mutex
);
267 dev
->irq_enabled
= 0;
268 mutex_unlock(&dev
->struct_mutex
);
273 EXPORT_SYMBOL(drm_irq_install
);
276 * Uninstall the IRQ handler.
278 * \param dev DRM device.
280 * Calls the driver's \c drm_driver_irq_uninstall() function, and stops the irq.
282 int drm_irq_uninstall(struct drm_device
* dev
)
284 unsigned long irqflags
;
287 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
290 mutex_lock(&dev
->struct_mutex
);
291 irq_enabled
= dev
->irq_enabled
;
292 dev
->irq_enabled
= 0;
293 mutex_unlock(&dev
->struct_mutex
);
296 * Wake up any waiters so they don't hang.
298 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
299 for (i
= 0; i
< dev
->num_crtcs
; i
++) {
300 DRM_WAKEUP(&dev
->vbl_queue
[i
]);
301 dev
->vblank_enabled
[i
] = 0;
302 dev
->last_vblank
[i
] = dev
->driver
->get_vblank_counter(dev
, i
);
304 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
309 DRM_DEBUG("irq=%d\n", drm_dev_to_irq(dev
));
311 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
312 vga_client_register(dev
->pdev
, NULL
, NULL
, NULL
);
314 dev
->driver
->irq_uninstall(dev
);
316 free_irq(drm_dev_to_irq(dev
), dev
);
320 EXPORT_SYMBOL(drm_irq_uninstall
);
325 * \param inode device inode.
326 * \param file_priv DRM file private.
327 * \param cmd command.
328 * \param arg user argument, pointing to a drm_control structure.
329 * \return zero on success or a negative number on failure.
331 * Calls irq_install() or irq_uninstall() according to \p arg.
333 int drm_control(struct drm_device
*dev
, void *data
,
334 struct drm_file
*file_priv
)
336 struct drm_control
*ctl
= data
;
338 /* if we haven't irq we fallback for compatibility reasons - this used to be a separate function in drm_dma.h */
342 case DRM_INST_HANDLER
:
343 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
345 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
347 if (dev
->if_version
< DRM_IF_VERSION(1, 2) &&
348 ctl
->irq
!= drm_dev_to_irq(dev
))
350 return drm_irq_install(dev
);
351 case DRM_UNINST_HANDLER
:
352 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
354 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
356 return drm_irq_uninstall(dev
);
363 * drm_vblank_count - retrieve "cooked" vblank counter value
365 * @crtc: which counter to retrieve
367 * Fetches the "cooked" vblank count value that represents the number of
368 * vblank events since the system was booted, including lost events due to
369 * modesetting activity.
371 u32
drm_vblank_count(struct drm_device
*dev
, int crtc
)
373 return atomic_read(&dev
->_vblank_count
[crtc
]);
375 EXPORT_SYMBOL(drm_vblank_count
);
378 * drm_update_vblank_count - update the master vblank counter
380 * @crtc: counter to update
382 * Call back into the driver to update the appropriate vblank counter
383 * (specified by @crtc). Deal with wraparound, if it occurred, and
384 * update the last read value so we can deal with wraparound on the next
387 * Only necessary when going from off->on, to account for frames we
388 * didn't get an interrupt for.
390 * Note: caller must hold dev->vbl_lock since this reads & writes
391 * device vblank fields.
393 static void drm_update_vblank_count(struct drm_device
*dev
, int crtc
)
395 u32 cur_vblank
, diff
;
398 * Interrupts were disabled prior to this call, so deal with counter
400 * NOTE! It's possible we lost a full dev->max_vblank_count events
401 * here if the register is small or we had vblank interrupts off for
404 cur_vblank
= dev
->driver
->get_vblank_counter(dev
, crtc
);
405 diff
= cur_vblank
- dev
->last_vblank
[crtc
];
406 if (cur_vblank
< dev
->last_vblank
[crtc
]) {
407 diff
+= dev
->max_vblank_count
;
409 DRM_DEBUG("last_vblank[%d]=0x%x, cur_vblank=0x%x => diff=0x%x\n",
410 crtc
, dev
->last_vblank
[crtc
], cur_vblank
, diff
);
413 DRM_DEBUG("enabling vblank interrupts on crtc %d, missed %d\n",
416 atomic_add(diff
, &dev
->_vblank_count
[crtc
]);
420 * drm_vblank_get - get a reference count on vblank events
422 * @crtc: which CRTC to own
424 * Acquire a reference count on vblank events to avoid having them disabled
428 * Zero on success, nonzero on failure.
430 int drm_vblank_get(struct drm_device
*dev
, int crtc
)
432 unsigned long irqflags
;
435 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
436 /* Going from 0->1 means we have to enable interrupts again */
437 if (atomic_add_return(1, &dev
->vblank_refcount
[crtc
]) == 1) {
438 if (!dev
->vblank_enabled
[crtc
]) {
439 ret
= dev
->driver
->enable_vblank(dev
, crtc
);
440 DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc
, ret
);
442 atomic_dec(&dev
->vblank_refcount
[crtc
]);
444 dev
->vblank_enabled
[crtc
] = 1;
445 drm_update_vblank_count(dev
, crtc
);
449 if (!dev
->vblank_enabled
[crtc
]) {
450 atomic_dec(&dev
->vblank_refcount
[crtc
]);
454 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
458 EXPORT_SYMBOL(drm_vblank_get
);
461 * drm_vblank_put - give up ownership of vblank events
463 * @crtc: which counter to give up
465 * Release ownership of a given vblank counter, turning off interrupts
468 void drm_vblank_put(struct drm_device
*dev
, int crtc
)
470 BUG_ON (atomic_read (&dev
->vblank_refcount
[crtc
]) == 0);
472 /* Last user schedules interrupt disable */
473 if (atomic_dec_and_test(&dev
->vblank_refcount
[crtc
]))
474 mod_timer(&dev
->vblank_disable_timer
, jiffies
+ 5*DRM_HZ
);
476 EXPORT_SYMBOL(drm_vblank_put
);
478 void drm_vblank_off(struct drm_device
*dev
, int crtc
)
480 unsigned long irqflags
;
482 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
483 dev
->driver
->disable_vblank(dev
, crtc
);
484 DRM_WAKEUP(&dev
->vbl_queue
[crtc
]);
485 dev
->vblank_enabled
[crtc
] = 0;
486 dev
->last_vblank
[crtc
] = dev
->driver
->get_vblank_counter(dev
, crtc
);
487 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
489 EXPORT_SYMBOL(drm_vblank_off
);
492 * drm_vblank_pre_modeset - account for vblanks across mode sets
494 * @crtc: CRTC in question
495 * @post: post or pre mode set?
497 * Account for vblank events across mode setting events, which will likely
498 * reset the hardware frame counter.
500 void drm_vblank_pre_modeset(struct drm_device
*dev
, int crtc
)
502 /* vblank is not initialized (IRQ not installed ?) */
506 * To avoid all the problems that might happen if interrupts
507 * were enabled/disabled around or between these calls, we just
508 * have the kernel take a reference on the CRTC (just once though
509 * to avoid corrupting the count if multiple, mismatch calls occur),
510 * so that interrupts remain enabled in the interim.
512 if (!dev
->vblank_inmodeset
[crtc
]) {
513 dev
->vblank_inmodeset
[crtc
] = 0x1;
514 if (drm_vblank_get(dev
, crtc
) == 0)
515 dev
->vblank_inmodeset
[crtc
] |= 0x2;
518 EXPORT_SYMBOL(drm_vblank_pre_modeset
);
520 void drm_vblank_post_modeset(struct drm_device
*dev
, int crtc
)
522 unsigned long irqflags
;
524 if (dev
->vblank_inmodeset
[crtc
]) {
525 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
526 dev
->vblank_disable_allowed
= 1;
527 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
529 if (dev
->vblank_inmodeset
[crtc
] & 0x2)
530 drm_vblank_put(dev
, crtc
);
532 dev
->vblank_inmodeset
[crtc
] = 0;
535 EXPORT_SYMBOL(drm_vblank_post_modeset
);
538 * drm_modeset_ctl - handle vblank event counter changes across mode switch
539 * @DRM_IOCTL_ARGS: standard ioctl arguments
541 * Applications should call the %_DRM_PRE_MODESET and %_DRM_POST_MODESET
542 * ioctls around modesetting so that any lost vblank events are accounted for.
544 * Generally the counter will reset across mode sets. If interrupts are
545 * enabled around this call, we don't have to do anything since the counter
546 * will have already been incremented.
548 int drm_modeset_ctl(struct drm_device
*dev
, void *data
,
549 struct drm_file
*file_priv
)
551 struct drm_modeset_ctl
*modeset
= data
;
554 /* If drm_vblank_init() hasn't been called yet, just no-op */
558 crtc
= modeset
->crtc
;
559 if (crtc
>= dev
->num_crtcs
) {
564 switch (modeset
->cmd
) {
565 case _DRM_PRE_MODESET
:
566 drm_vblank_pre_modeset(dev
, crtc
);
568 case _DRM_POST_MODESET
:
569 drm_vblank_post_modeset(dev
, crtc
);
580 static int drm_queue_vblank_event(struct drm_device
*dev
, int pipe
,
581 union drm_wait_vblank
*vblwait
,
582 struct drm_file
*file_priv
)
584 struct drm_pending_vblank_event
*e
;
589 e
= kzalloc(sizeof *e
, GFP_KERNEL
);
594 e
->base
.pid
= current
->pid
;
595 e
->event
.base
.type
= DRM_EVENT_VBLANK
;
596 e
->event
.base
.length
= sizeof e
->event
;
597 e
->event
.user_data
= vblwait
->request
.signal
;
598 e
->base
.event
= &e
->event
.base
;
599 e
->base
.file_priv
= file_priv
;
600 e
->base
.destroy
= (void (*) (struct drm_pending_event
*)) kfree
;
602 do_gettimeofday(&now
);
603 spin_lock_irqsave(&dev
->event_lock
, flags
);
605 if (file_priv
->event_space
< sizeof e
->event
) {
606 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
611 file_priv
->event_space
-= sizeof e
->event
;
612 seq
= drm_vblank_count(dev
, pipe
);
613 if ((vblwait
->request
.type
& _DRM_VBLANK_NEXTONMISS
) &&
614 (seq
- vblwait
->request
.sequence
) <= (1 << 23)) {
615 vblwait
->request
.sequence
= seq
+ 1;
616 vblwait
->reply
.sequence
= vblwait
->request
.sequence
;
619 DRM_DEBUG("event on vblank count %d, current %d, crtc %d\n",
620 vblwait
->request
.sequence
, seq
, pipe
);
622 trace_drm_vblank_event_queued(current
->pid
, pipe
,
623 vblwait
->request
.sequence
);
625 e
->event
.sequence
= vblwait
->request
.sequence
;
626 if ((seq
- vblwait
->request
.sequence
) <= (1 << 23)) {
627 e
->event
.tv_sec
= now
.tv_sec
;
628 e
->event
.tv_usec
= now
.tv_usec
;
629 drm_vblank_put(dev
, e
->pipe
);
630 list_add_tail(&e
->base
.link
, &e
->base
.file_priv
->event_list
);
631 wake_up_interruptible(&e
->base
.file_priv
->event_wait
);
632 trace_drm_vblank_event_delivered(current
->pid
, pipe
,
633 vblwait
->request
.sequence
);
635 list_add_tail(&e
->base
.link
, &dev
->vblank_event_list
);
638 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
646 * \param inode device inode.
647 * \param file_priv DRM file private.
648 * \param cmd command.
649 * \param data user argument, pointing to a drm_wait_vblank structure.
650 * \return zero on success or a negative number on failure.
652 * This function enables the vblank interrupt on the pipe requested, then
653 * sleeps waiting for the requested sequence number to occur, and drops
654 * the vblank interrupt refcount afterwards. (vblank irq disable follows that
655 * after a timeout with no further vblank waits scheduled).
657 int drm_wait_vblank(struct drm_device
*dev
, void *data
,
658 struct drm_file
*file_priv
)
660 union drm_wait_vblank
*vblwait
= data
;
662 unsigned int flags
, seq
, crtc
;
664 if ((!drm_dev_to_irq(dev
)) || (!dev
->irq_enabled
))
667 if (vblwait
->request
.type
& _DRM_VBLANK_SIGNAL
)
670 if (vblwait
->request
.type
&
671 ~(_DRM_VBLANK_TYPES_MASK
| _DRM_VBLANK_FLAGS_MASK
)) {
672 DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n",
673 vblwait
->request
.type
,
674 (_DRM_VBLANK_TYPES_MASK
| _DRM_VBLANK_FLAGS_MASK
));
678 flags
= vblwait
->request
.type
& _DRM_VBLANK_FLAGS_MASK
;
679 crtc
= flags
& _DRM_VBLANK_SECONDARY
? 1 : 0;
681 if (crtc
>= dev
->num_crtcs
)
684 ret
= drm_vblank_get(dev
, crtc
);
686 DRM_DEBUG("failed to acquire vblank counter, %d\n", ret
);
689 seq
= drm_vblank_count(dev
, crtc
);
691 switch (vblwait
->request
.type
& _DRM_VBLANK_TYPES_MASK
) {
692 case _DRM_VBLANK_RELATIVE
:
693 vblwait
->request
.sequence
+= seq
;
694 vblwait
->request
.type
&= ~_DRM_VBLANK_RELATIVE
;
695 case _DRM_VBLANK_ABSOLUTE
:
702 if (flags
& _DRM_VBLANK_EVENT
)
703 return drm_queue_vblank_event(dev
, crtc
, vblwait
, file_priv
);
705 if ((flags
& _DRM_VBLANK_NEXTONMISS
) &&
706 (seq
- vblwait
->request
.sequence
) <= (1<<23)) {
707 vblwait
->request
.sequence
= seq
+ 1;
710 DRM_DEBUG("waiting on vblank count %d, crtc %d\n",
711 vblwait
->request
.sequence
, crtc
);
712 dev
->last_vblank_wait
[crtc
] = vblwait
->request
.sequence
;
713 DRM_WAIT_ON(ret
, dev
->vbl_queue
[crtc
], 3 * DRM_HZ
,
714 (((drm_vblank_count(dev
, crtc
) -
715 vblwait
->request
.sequence
) <= (1 << 23)) ||
721 do_gettimeofday(&now
);
723 vblwait
->reply
.tval_sec
= now
.tv_sec
;
724 vblwait
->reply
.tval_usec
= now
.tv_usec
;
725 vblwait
->reply
.sequence
= drm_vblank_count(dev
, crtc
);
726 DRM_DEBUG("returning %d to client\n",
727 vblwait
->reply
.sequence
);
729 DRM_DEBUG("vblank wait interrupted by signal\n");
733 drm_vblank_put(dev
, crtc
);
737 void drm_handle_vblank_events(struct drm_device
*dev
, int crtc
)
739 struct drm_pending_vblank_event
*e
, *t
;
744 do_gettimeofday(&now
);
745 seq
= drm_vblank_count(dev
, crtc
);
747 spin_lock_irqsave(&dev
->event_lock
, flags
);
749 list_for_each_entry_safe(e
, t
, &dev
->vblank_event_list
, base
.link
) {
752 if ((seq
- e
->event
.sequence
) > (1<<23))
755 DRM_DEBUG("vblank event on %d, current %d\n",
756 e
->event
.sequence
, seq
);
758 e
->event
.sequence
= seq
;
759 e
->event
.tv_sec
= now
.tv_sec
;
760 e
->event
.tv_usec
= now
.tv_usec
;
761 drm_vblank_put(dev
, e
->pipe
);
762 list_move_tail(&e
->base
.link
, &e
->base
.file_priv
->event_list
);
763 wake_up_interruptible(&e
->base
.file_priv
->event_wait
);
764 trace_drm_vblank_event_delivered(e
->base
.pid
, e
->pipe
,
768 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
770 trace_drm_vblank_event(crtc
, seq
);
774 * drm_handle_vblank - handle a vblank event
776 * @crtc: where this event occurred
778 * Drivers should call this routine in their vblank interrupt handlers to
779 * update the vblank counter and send any signals that may be pending.
781 void drm_handle_vblank(struct drm_device
*dev
, int crtc
)
786 atomic_inc(&dev
->_vblank_count
[crtc
]);
787 DRM_WAKEUP(&dev
->vbl_queue
[crtc
]);
788 drm_handle_vblank_events(dev
, crtc
);
790 EXPORT_SYMBOL(drm_handle_vblank
);