13  * DOC: vblank works
39  * particular vblank has passed, and then executes the work at realtime
46 void drm_handle_vblank_works(struct drm_vblank_crtc *vblank)  in drm_handle_vblank_works()  argument
49 	u64 count = atomic64_read(&vblank->count);  in drm_handle_vblank_works()
52 	assert_spin_locked(&vblank->dev->event_lock);  in drm_handle_vblank_works()
54 	list_for_each_entry_safe(work, next, &vblank->pending_work, node) {  in drm_handle_vblank_works()
59 		drm_vblank_put(vblank->dev, vblank->pipe);  in drm_handle_vblank_works()
60 		kthread_queue_work(vblank->worker, &work->base);  in drm_handle_vblank_works()
64 		wake_up_all(&vblank->work_wait_queue);  in drm_handle_vblank_works()
67 /* Handle cancelling any pending vblank work items and drop respective vblank
68  * references in response to vblank interrupts being disabled.
70 void drm_vblank_cancel_pending_works(struct drm_vblank_crtc *vblank)  in drm_vblank_cancel_pending_works()  argument
74 	assert_spin_locked(&vblank->dev->event_lock);  in drm_vblank_cancel_pending_works()
76 	drm_WARN_ONCE(vblank->dev, !list_empty(&vblank->pending_work),  in drm_vblank_cancel_pending_works()
77 		      "Cancelling pending vblank works!\n");  in drm_vblank_cancel_pending_works()
79 	list_for_each_entry_safe(work, next, &vblank->pending_work, node) {  in drm_vblank_cancel_pending_works()
81 		drm_vblank_put(vblank->dev, vblank->pipe);  in drm_vblank_cancel_pending_works()
84 	wake_up_all(&vblank->work_wait_queue);  in drm_vblank_cancel_pending_works()
88  * drm_vblank_work_schedule - schedule a vblank work
89  * @work: vblank work to schedule
90  * @count: target vblank count
91  * @nextonmiss: defer until the next vblank if target vblank was missed
93  * Schedule @work for execution once the crtc vblank count reaches @count.
95  * If the crtc vblank count has already reached @count and @nextonmiss is
98  * If the crtc vblank count has already reached @count and @nextonmiss is
99  * %true the work is deferred until the next vblank (as if @count has been
100  * specified as crtc vblank count + 1).
112 	struct drm_vblank_crtc *vblank = work->vblank;  in drm_vblank_work_schedule()  local
113 	struct drm_device *dev = vblank->dev;  in drm_vblank_work_schedule()
124 	inmodeset = vblank->inmodeset;  in drm_vblank_work_schedule()
130 		ret = drm_vblank_get(dev, vblank->pipe);  in drm_vblank_work_schedule()
141 	cur_vbl = drm_vblank_count(dev, vblank->pipe);  in drm_vblank_work_schedule()
145 			     "crtc %d vblank %llu already passed (current %llu)\n",  in drm_vblank_work_schedule()
146 			     vblank->pipe, count, cur_vbl);  in drm_vblank_work_schedule()
149 		drm_vblank_put(dev, vblank->pipe);  in drm_vblank_work_schedule()
150 		ret = kthread_queue_work(vblank->worker, &work->base);  in drm_vblank_work_schedule()
158 			list_add_tail(&work->node, &vblank->pending_work);  in drm_vblank_work_schedule()
165 		wake_up_all(&vblank->work_wait_queue);  in drm_vblank_work_schedule()
171  * drm_vblank_work_cancel_sync - cancel a vblank work and wait for it to
173  * @work: vblank work to cancel
175  * Cancel an already scheduled vblank work and wait for its
187 	struct drm_vblank_crtc *vblank = work->vblank;  in drm_vblank_work_cancel_sync()  local
188 	struct drm_device *dev = vblank->dev;  in drm_vblank_work_cancel_sync()
194 		drm_vblank_put(vblank->dev, vblank->pipe);  in drm_vblank_work_cancel_sync()
201 	wake_up_all(&vblank->work_wait_queue);  in drm_vblank_work_cancel_sync()
215  * drm_vblank_work_flush - wait for a scheduled vblank work to finish
217  * @work: vblank work to flush
223 	struct drm_vblank_crtc *vblank = work->vblank;  in drm_vblank_work_flush()  local
224 	struct drm_device *dev = vblank->dev;  in drm_vblank_work_flush()
227 	wait_event_lock_irq(vblank->work_wait_queue, list_empty(&work->node),  in drm_vblank_work_flush()
236  * drm_vblank_work_flush_all - flush all currently pending vblank work on crtc.
237  * @crtc: crtc for which vblank work to flush
239  * Wait until all currently queued vblank work on @crtc
245 	struct drm_vblank_crtc *vblank = &dev->vblank[drm_crtc_index(crtc)];  in drm_vblank_work_flush_all()  local
248 	wait_event_lock_irq(vblank->work_wait_queue,  in drm_vblank_work_flush_all()
249 			    list_empty(&vblank->pending_work),  in drm_vblank_work_flush_all()
253 	kthread_flush_worker(vblank->worker);  in drm_vblank_work_flush_all()
258  * drm_vblank_work_init - initialize a vblank work item
259  * @work: vblank work item
260  * @crtc: CRTC whose vblank will trigger the work execution
263  * Initialize a vblank work item for a specific crtc.
270 	work->vblank = drm_crtc_vblank_crtc(crtc);  in drm_vblank_work_init()
274 int drm_vblank_worker_init(struct drm_vblank_crtc *vblank)  in drm_vblank_worker_init()  argument
278 	INIT_LIST_HEAD(&vblank->pending_work);  in drm_vblank_worker_init()
279 	init_waitqueue_head(&vblank->work_wait_queue);  in drm_vblank_worker_init()
281 				       vblank->dev->primary->index,  in drm_vblank_worker_init()
282 				       vblank->pipe);  in drm_vblank_worker_init()
286 	vblank->worker = worker;  in drm_vblank_worker_init()