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_HAVE_IRQ
))
64 if ((p
->busnum
>> 8) != drm_get_pci_domain(dev
) ||
65 (p
->busnum
& 0xff) != dev
->pdev
->bus
->number
||
66 p
->devnum
!= PCI_SLOT(dev
->pdev
->devfn
) || p
->funcnum
!= PCI_FUNC(dev
->pdev
->devfn
))
69 p
->irq
= dev
->pdev
->irq
;
71 DRM_DEBUG("%d:%d:%d => IRQ %d\n", p
->busnum
, p
->devnum
, p
->funcnum
,
77 static void vblank_disable_fn(unsigned long arg
)
79 struct drm_device
*dev
= (struct drm_device
*)arg
;
80 unsigned long irqflags
;
83 if (!dev
->vblank_disable_allowed
)
86 for (i
= 0; i
< dev
->num_crtcs
; i
++) {
87 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
88 if (atomic_read(&dev
->vblank_refcount
[i
]) == 0 &&
89 dev
->vblank_enabled
[i
]) {
90 DRM_DEBUG("disabling vblank on crtc %d\n", i
);
92 dev
->driver
->get_vblank_counter(dev
, i
);
93 dev
->driver
->disable_vblank(dev
, i
);
94 dev
->vblank_enabled
[i
] = 0;
96 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
100 void drm_vblank_cleanup(struct drm_device
*dev
)
102 /* Bail if the driver didn't call drm_vblank_init() */
103 if (dev
->num_crtcs
== 0)
106 del_timer(&dev
->vblank_disable_timer
);
108 vblank_disable_fn((unsigned long)dev
);
110 kfree(dev
->vbl_queue
);
111 kfree(dev
->_vblank_count
);
112 kfree(dev
->vblank_refcount
);
113 kfree(dev
->vblank_enabled
);
114 kfree(dev
->last_vblank
);
115 kfree(dev
->last_vblank_wait
);
116 kfree(dev
->vblank_inmodeset
);
120 EXPORT_SYMBOL(drm_vblank_cleanup
);
122 int drm_vblank_init(struct drm_device
*dev
, int num_crtcs
)
124 int i
, ret
= -ENOMEM
;
126 setup_timer(&dev
->vblank_disable_timer
, vblank_disable_fn
,
128 spin_lock_init(&dev
->vbl_lock
);
129 dev
->num_crtcs
= num_crtcs
;
131 dev
->vbl_queue
= kmalloc(sizeof(wait_queue_head_t
) * num_crtcs
,
136 dev
->_vblank_count
= kmalloc(sizeof(atomic_t
) * num_crtcs
, GFP_KERNEL
);
137 if (!dev
->_vblank_count
)
140 dev
->vblank_refcount
= kmalloc(sizeof(atomic_t
) * num_crtcs
,
142 if (!dev
->vblank_refcount
)
145 dev
->vblank_enabled
= kcalloc(num_crtcs
, sizeof(int), GFP_KERNEL
);
146 if (!dev
->vblank_enabled
)
149 dev
->last_vblank
= kcalloc(num_crtcs
, sizeof(u32
), GFP_KERNEL
);
150 if (!dev
->last_vblank
)
153 dev
->last_vblank_wait
= kcalloc(num_crtcs
, sizeof(u32
), GFP_KERNEL
);
154 if (!dev
->last_vblank_wait
)
157 dev
->vblank_inmodeset
= kcalloc(num_crtcs
, sizeof(int), GFP_KERNEL
);
158 if (!dev
->vblank_inmodeset
)
161 /* Zero per-crtc vblank stuff */
162 for (i
= 0; i
< num_crtcs
; i
++) {
163 init_waitqueue_head(&dev
->vbl_queue
[i
]);
164 atomic_set(&dev
->_vblank_count
[i
], 0);
165 atomic_set(&dev
->vblank_refcount
[i
], 0);
168 dev
->vblank_disable_allowed
= 0;
172 drm_vblank_cleanup(dev
);
175 EXPORT_SYMBOL(drm_vblank_init
);
177 static void drm_irq_vgaarb_nokms(void *cookie
, bool state
)
179 struct drm_device
*dev
= cookie
;
181 if (dev
->driver
->vgaarb_irq
) {
182 dev
->driver
->vgaarb_irq(dev
, state
);
186 if (!dev
->irq_enabled
)
190 dev
->driver
->irq_uninstall(dev
);
192 dev
->driver
->irq_preinstall(dev
);
193 dev
->driver
->irq_postinstall(dev
);
198 * Install IRQ handler.
200 * \param dev DRM device.
202 * Initializes the IRQ related data. Installs the handler, calling the driver
203 * \c drm_driver_irq_preinstall() and \c drm_driver_irq_postinstall() functions
204 * before and after the installation.
206 int drm_irq_install(struct drm_device
*dev
)
209 unsigned long sh_flags
= 0;
212 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
215 if (dev
->pdev
->irq
== 0)
218 mutex_lock(&dev
->struct_mutex
);
220 /* Driver must have been initialized */
221 if (!dev
->dev_private
) {
222 mutex_unlock(&dev
->struct_mutex
);
226 if (dev
->irq_enabled
) {
227 mutex_unlock(&dev
->struct_mutex
);
230 dev
->irq_enabled
= 1;
231 mutex_unlock(&dev
->struct_mutex
);
233 DRM_DEBUG("irq=%d\n", dev
->pdev
->irq
);
235 /* Before installing handler */
236 dev
->driver
->irq_preinstall(dev
);
238 /* Install handler */
239 if (drm_core_check_feature(dev
, DRIVER_IRQ_SHARED
))
240 sh_flags
= IRQF_SHARED
;
243 irqname
= dev
->devname
;
245 irqname
= dev
->driver
->name
;
247 ret
= request_irq(drm_dev_to_irq(dev
), dev
->driver
->irq_handler
,
248 sh_flags
, irqname
, dev
);
251 mutex_lock(&dev
->struct_mutex
);
252 dev
->irq_enabled
= 0;
253 mutex_unlock(&dev
->struct_mutex
);
257 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
258 vga_client_register(dev
->pdev
, (void *)dev
, drm_irq_vgaarb_nokms
, NULL
);
260 /* After installing handler */
261 ret
= dev
->driver
->irq_postinstall(dev
);
263 mutex_lock(&dev
->struct_mutex
);
264 dev
->irq_enabled
= 0;
265 mutex_unlock(&dev
->struct_mutex
);
270 EXPORT_SYMBOL(drm_irq_install
);
273 * Uninstall the IRQ handler.
275 * \param dev DRM device.
277 * Calls the driver's \c drm_driver_irq_uninstall() function, and stops the irq.
279 int drm_irq_uninstall(struct drm_device
* dev
)
281 unsigned long irqflags
;
284 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
287 mutex_lock(&dev
->struct_mutex
);
288 irq_enabled
= dev
->irq_enabled
;
289 dev
->irq_enabled
= 0;
290 mutex_unlock(&dev
->struct_mutex
);
293 * Wake up any waiters so they don't hang.
295 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
296 for (i
= 0; i
< dev
->num_crtcs
; i
++) {
297 DRM_WAKEUP(&dev
->vbl_queue
[i
]);
298 dev
->vblank_enabled
[i
] = 0;
299 dev
->last_vblank
[i
] = dev
->driver
->get_vblank_counter(dev
, i
);
301 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
306 DRM_DEBUG("irq=%d\n", dev
->pdev
->irq
);
308 if (!drm_core_check_feature(dev
, DRIVER_MODESET
))
309 vga_client_register(dev
->pdev
, NULL
, NULL
, NULL
);
311 dev
->driver
->irq_uninstall(dev
);
313 free_irq(dev
->pdev
->irq
, dev
);
317 EXPORT_SYMBOL(drm_irq_uninstall
);
322 * \param inode device inode.
323 * \param file_priv DRM file private.
324 * \param cmd command.
325 * \param arg user argument, pointing to a drm_control structure.
326 * \return zero on success or a negative number on failure.
328 * Calls irq_install() or irq_uninstall() according to \p arg.
330 int drm_control(struct drm_device
*dev
, void *data
,
331 struct drm_file
*file_priv
)
333 struct drm_control
*ctl
= data
;
335 /* if we haven't irq we fallback for compatibility reasons - this used to be a separate function in drm_dma.h */
339 case DRM_INST_HANDLER
:
340 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
342 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
344 if (dev
->if_version
< DRM_IF_VERSION(1, 2) &&
345 ctl
->irq
!= dev
->pdev
->irq
)
347 return drm_irq_install(dev
);
348 case DRM_UNINST_HANDLER
:
349 if (!drm_core_check_feature(dev
, DRIVER_HAVE_IRQ
))
351 if (drm_core_check_feature(dev
, DRIVER_MODESET
))
353 return drm_irq_uninstall(dev
);
360 * drm_vblank_count - retrieve "cooked" vblank counter value
362 * @crtc: which counter to retrieve
364 * Fetches the "cooked" vblank count value that represents the number of
365 * vblank events since the system was booted, including lost events due to
366 * modesetting activity.
368 u32
drm_vblank_count(struct drm_device
*dev
, int crtc
)
370 return atomic_read(&dev
->_vblank_count
[crtc
]);
372 EXPORT_SYMBOL(drm_vblank_count
);
375 * drm_update_vblank_count - update the master vblank counter
377 * @crtc: counter to update
379 * Call back into the driver to update the appropriate vblank counter
380 * (specified by @crtc). Deal with wraparound, if it occurred, and
381 * update the last read value so we can deal with wraparound on the next
384 * Only necessary when going from off->on, to account for frames we
385 * didn't get an interrupt for.
387 * Note: caller must hold dev->vbl_lock since this reads & writes
388 * device vblank fields.
390 static void drm_update_vblank_count(struct drm_device
*dev
, int crtc
)
392 u32 cur_vblank
, diff
;
395 * Interrupts were disabled prior to this call, so deal with counter
397 * NOTE! It's possible we lost a full dev->max_vblank_count events
398 * here if the register is small or we had vblank interrupts off for
401 cur_vblank
= dev
->driver
->get_vblank_counter(dev
, crtc
);
402 diff
= cur_vblank
- dev
->last_vblank
[crtc
];
403 if (cur_vblank
< dev
->last_vblank
[crtc
]) {
404 diff
+= dev
->max_vblank_count
;
406 DRM_DEBUG("last_vblank[%d]=0x%x, cur_vblank=0x%x => diff=0x%x\n",
407 crtc
, dev
->last_vblank
[crtc
], cur_vblank
, diff
);
410 DRM_DEBUG("enabling vblank interrupts on crtc %d, missed %d\n",
413 atomic_add(diff
, &dev
->_vblank_count
[crtc
]);
417 * drm_vblank_get - get a reference count on vblank events
419 * @crtc: which CRTC to own
421 * Acquire a reference count on vblank events to avoid having them disabled
425 * Zero on success, nonzero on failure.
427 int drm_vblank_get(struct drm_device
*dev
, int crtc
)
429 unsigned long irqflags
;
432 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
433 /* Going from 0->1 means we have to enable interrupts again */
434 if (atomic_add_return(1, &dev
->vblank_refcount
[crtc
]) == 1) {
435 if (!dev
->vblank_enabled
[crtc
]) {
436 ret
= dev
->driver
->enable_vblank(dev
, crtc
);
437 DRM_DEBUG("enabling vblank on crtc %d, ret: %d\n", crtc
, ret
);
439 atomic_dec(&dev
->vblank_refcount
[crtc
]);
441 dev
->vblank_enabled
[crtc
] = 1;
442 drm_update_vblank_count(dev
, crtc
);
446 if (!dev
->vblank_enabled
[crtc
]) {
447 atomic_dec(&dev
->vblank_refcount
[crtc
]);
451 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
455 EXPORT_SYMBOL(drm_vblank_get
);
458 * drm_vblank_put - give up ownership of vblank events
460 * @crtc: which counter to give up
462 * Release ownership of a given vblank counter, turning off interrupts
465 void drm_vblank_put(struct drm_device
*dev
, int crtc
)
467 BUG_ON (atomic_read (&dev
->vblank_refcount
[crtc
]) == 0);
469 /* Last user schedules interrupt disable */
470 if (atomic_dec_and_test(&dev
->vblank_refcount
[crtc
]))
471 mod_timer(&dev
->vblank_disable_timer
, jiffies
+ 5*DRM_HZ
);
473 EXPORT_SYMBOL(drm_vblank_put
);
475 void drm_vblank_off(struct drm_device
*dev
, int crtc
)
477 unsigned long irqflags
;
479 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
480 dev
->driver
->disable_vblank(dev
, crtc
);
481 DRM_WAKEUP(&dev
->vbl_queue
[crtc
]);
482 dev
->vblank_enabled
[crtc
] = 0;
483 dev
->last_vblank
[crtc
] = dev
->driver
->get_vblank_counter(dev
, crtc
);
484 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
486 EXPORT_SYMBOL(drm_vblank_off
);
489 * drm_vblank_pre_modeset - account for vblanks across mode sets
491 * @crtc: CRTC in question
492 * @post: post or pre mode set?
494 * Account for vblank events across mode setting events, which will likely
495 * reset the hardware frame counter.
497 void drm_vblank_pre_modeset(struct drm_device
*dev
, int crtc
)
499 /* vblank is not initialized (IRQ not installed ?) */
503 * To avoid all the problems that might happen if interrupts
504 * were enabled/disabled around or between these calls, we just
505 * have the kernel take a reference on the CRTC (just once though
506 * to avoid corrupting the count if multiple, mismatch calls occur),
507 * so that interrupts remain enabled in the interim.
509 if (!dev
->vblank_inmodeset
[crtc
]) {
510 dev
->vblank_inmodeset
[crtc
] = 0x1;
511 if (drm_vblank_get(dev
, crtc
) == 0)
512 dev
->vblank_inmodeset
[crtc
] |= 0x2;
515 EXPORT_SYMBOL(drm_vblank_pre_modeset
);
517 void drm_vblank_post_modeset(struct drm_device
*dev
, int crtc
)
519 unsigned long irqflags
;
521 if (dev
->vblank_inmodeset
[crtc
]) {
522 spin_lock_irqsave(&dev
->vbl_lock
, irqflags
);
523 dev
->vblank_disable_allowed
= 1;
524 spin_unlock_irqrestore(&dev
->vbl_lock
, irqflags
);
526 if (dev
->vblank_inmodeset
[crtc
] & 0x2)
527 drm_vblank_put(dev
, crtc
);
529 dev
->vblank_inmodeset
[crtc
] = 0;
532 EXPORT_SYMBOL(drm_vblank_post_modeset
);
535 * drm_modeset_ctl - handle vblank event counter changes across mode switch
536 * @DRM_IOCTL_ARGS: standard ioctl arguments
538 * Applications should call the %_DRM_PRE_MODESET and %_DRM_POST_MODESET
539 * ioctls around modesetting so that any lost vblank events are accounted for.
541 * Generally the counter will reset across mode sets. If interrupts are
542 * enabled around this call, we don't have to do anything since the counter
543 * will have already been incremented.
545 int drm_modeset_ctl(struct drm_device
*dev
, void *data
,
546 struct drm_file
*file_priv
)
548 struct drm_modeset_ctl
*modeset
= data
;
551 /* If drm_vblank_init() hasn't been called yet, just no-op */
555 crtc
= modeset
->crtc
;
556 if (crtc
>= dev
->num_crtcs
) {
561 switch (modeset
->cmd
) {
562 case _DRM_PRE_MODESET
:
563 drm_vblank_pre_modeset(dev
, crtc
);
565 case _DRM_POST_MODESET
:
566 drm_vblank_post_modeset(dev
, crtc
);
577 static int drm_queue_vblank_event(struct drm_device
*dev
, int pipe
,
578 union drm_wait_vblank
*vblwait
,
579 struct drm_file
*file_priv
)
581 struct drm_pending_vblank_event
*e
;
586 e
= kzalloc(sizeof *e
, GFP_KERNEL
);
591 e
->base
.pid
= current
->pid
;
592 e
->event
.base
.type
= DRM_EVENT_VBLANK
;
593 e
->event
.base
.length
= sizeof e
->event
;
594 e
->event
.user_data
= vblwait
->request
.signal
;
595 e
->base
.event
= &e
->event
.base
;
596 e
->base
.file_priv
= file_priv
;
597 e
->base
.destroy
= (void (*) (struct drm_pending_event
*)) kfree
;
599 do_gettimeofday(&now
);
600 spin_lock_irqsave(&dev
->event_lock
, flags
);
602 if (file_priv
->event_space
< sizeof e
->event
) {
603 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
608 file_priv
->event_space
-= sizeof e
->event
;
609 seq
= drm_vblank_count(dev
, pipe
);
610 if ((vblwait
->request
.type
& _DRM_VBLANK_NEXTONMISS
) &&
611 (seq
- vblwait
->request
.sequence
) <= (1 << 23)) {
612 vblwait
->request
.sequence
= seq
+ 1;
613 vblwait
->reply
.sequence
= vblwait
->request
.sequence
;
616 DRM_DEBUG("event on vblank count %d, current %d, crtc %d\n",
617 vblwait
->request
.sequence
, seq
, pipe
);
619 trace_drm_vblank_event_queued(current
->pid
, pipe
,
620 vblwait
->request
.sequence
);
622 e
->event
.sequence
= vblwait
->request
.sequence
;
623 if ((seq
- vblwait
->request
.sequence
) <= (1 << 23)) {
624 e
->event
.tv_sec
= now
.tv_sec
;
625 e
->event
.tv_usec
= now
.tv_usec
;
626 drm_vblank_put(dev
, e
->pipe
);
627 list_add_tail(&e
->base
.link
, &e
->base
.file_priv
->event_list
);
628 wake_up_interruptible(&e
->base
.file_priv
->event_wait
);
629 trace_drm_vblank_event_delivered(current
->pid
, pipe
,
630 vblwait
->request
.sequence
);
632 list_add_tail(&e
->base
.link
, &dev
->vblank_event_list
);
635 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
643 * \param inode device inode.
644 * \param file_priv DRM file private.
645 * \param cmd command.
646 * \param data user argument, pointing to a drm_wait_vblank structure.
647 * \return zero on success or a negative number on failure.
649 * This function enables the vblank interrupt on the pipe requested, then
650 * sleeps waiting for the requested sequence number to occur, and drops
651 * the vblank interrupt refcount afterwards. (vblank irq disable follows that
652 * after a timeout with no further vblank waits scheduled).
654 int drm_wait_vblank(struct drm_device
*dev
, void *data
,
655 struct drm_file
*file_priv
)
657 union drm_wait_vblank
*vblwait
= data
;
659 unsigned int flags
, seq
, crtc
;
661 if ((!dev
->pdev
->irq
) || (!dev
->irq_enabled
))
664 if (vblwait
->request
.type
& _DRM_VBLANK_SIGNAL
)
667 if (vblwait
->request
.type
&
668 ~(_DRM_VBLANK_TYPES_MASK
| _DRM_VBLANK_FLAGS_MASK
)) {
669 DRM_ERROR("Unsupported type value 0x%x, supported mask 0x%x\n",
670 vblwait
->request
.type
,
671 (_DRM_VBLANK_TYPES_MASK
| _DRM_VBLANK_FLAGS_MASK
));
675 flags
= vblwait
->request
.type
& _DRM_VBLANK_FLAGS_MASK
;
676 crtc
= flags
& _DRM_VBLANK_SECONDARY
? 1 : 0;
678 if (crtc
>= dev
->num_crtcs
)
681 ret
= drm_vblank_get(dev
, crtc
);
683 DRM_DEBUG("failed to acquire vblank counter, %d\n", ret
);
686 seq
= drm_vblank_count(dev
, crtc
);
688 switch (vblwait
->request
.type
& _DRM_VBLANK_TYPES_MASK
) {
689 case _DRM_VBLANK_RELATIVE
:
690 vblwait
->request
.sequence
+= seq
;
691 vblwait
->request
.type
&= ~_DRM_VBLANK_RELATIVE
;
692 case _DRM_VBLANK_ABSOLUTE
:
699 if (flags
& _DRM_VBLANK_EVENT
)
700 return drm_queue_vblank_event(dev
, crtc
, vblwait
, file_priv
);
702 if ((flags
& _DRM_VBLANK_NEXTONMISS
) &&
703 (seq
- vblwait
->request
.sequence
) <= (1<<23)) {
704 vblwait
->request
.sequence
= seq
+ 1;
707 DRM_DEBUG("waiting on vblank count %d, crtc %d\n",
708 vblwait
->request
.sequence
, crtc
);
709 dev
->last_vblank_wait
[crtc
] = vblwait
->request
.sequence
;
710 DRM_WAIT_ON(ret
, dev
->vbl_queue
[crtc
], 3 * DRM_HZ
,
711 (((drm_vblank_count(dev
, crtc
) -
712 vblwait
->request
.sequence
) <= (1 << 23)) ||
718 do_gettimeofday(&now
);
720 vblwait
->reply
.tval_sec
= now
.tv_sec
;
721 vblwait
->reply
.tval_usec
= now
.tv_usec
;
722 vblwait
->reply
.sequence
= drm_vblank_count(dev
, crtc
);
723 DRM_DEBUG("returning %d to client\n",
724 vblwait
->reply
.sequence
);
726 DRM_DEBUG("vblank wait interrupted by signal\n");
730 drm_vblank_put(dev
, crtc
);
734 void drm_handle_vblank_events(struct drm_device
*dev
, int crtc
)
736 struct drm_pending_vblank_event
*e
, *t
;
741 do_gettimeofday(&now
);
742 seq
= drm_vblank_count(dev
, crtc
);
744 spin_lock_irqsave(&dev
->event_lock
, flags
);
746 list_for_each_entry_safe(e
, t
, &dev
->vblank_event_list
, base
.link
) {
749 if ((seq
- e
->event
.sequence
) > (1<<23))
752 DRM_DEBUG("vblank event on %d, current %d\n",
753 e
->event
.sequence
, seq
);
755 e
->event
.sequence
= seq
;
756 e
->event
.tv_sec
= now
.tv_sec
;
757 e
->event
.tv_usec
= now
.tv_usec
;
758 drm_vblank_put(dev
, e
->pipe
);
759 list_move_tail(&e
->base
.link
, &e
->base
.file_priv
->event_list
);
760 wake_up_interruptible(&e
->base
.file_priv
->event_wait
);
761 trace_drm_vblank_event_delivered(e
->base
.pid
, e
->pipe
,
765 spin_unlock_irqrestore(&dev
->event_lock
, flags
);
767 trace_drm_vblank_event(crtc
, seq
);
771 * drm_handle_vblank - handle a vblank event
773 * @crtc: where this event occurred
775 * Drivers should call this routine in their vblank interrupt handlers to
776 * update the vblank counter and send any signals that may be pending.
778 void drm_handle_vblank(struct drm_device
*dev
, int crtc
)
783 atomic_inc(&dev
->_vblank_count
[crtc
]);
784 DRM_WAKEUP(&dev
->vbl_queue
[crtc
]);
785 drm_handle_vblank_events(dev
, crtc
);
787 EXPORT_SYMBOL(drm_handle_vblank
);
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