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drm: Only handle _DRM_VBLANK_NEXTONMISS once 

Consolidate the _DRM_VBLANK_NEXTONMISS handling between drm_wait_vblank
and drm_queue_vblank_event.

This is a cleanup spotted while working on other changes.

(The way it was previously handled could also theoretically result in
drm_queue_vblank_event unnecessarily bumping vblwait->request.sequence,
if the vblank counter happened to increment between the
drm_vblank_count(_and_time) calls in each function, but that's unlikely)

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1466755187-29418-1-git-send-email-michel@daenzer.net
This commit is contained in:
Michel Dänzer 2016-06-24 16:59:47 +09:00 committed by Daniel Vetter
parent e6f15b763a
commit 97ef1ae0e0
1 changed files with 5 additions and 11 deletions
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16
drivers/gpu/drm/drm_irq.c
View File

@ -1588,12 +1588,6 @@ static int drm_queue_vblank_event(struct drm_device *dev, unsigned int pipe,
seq = drm_vblank_count_and_time(dev, pipe, &now);
if ((vblwait->request.type & _DRM_VBLANK_NEXTONMISS) &&
(seq - vblwait->request.sequence) <= (1 << 23)) {
vblwait->request.sequence = seq + 1;
vblwait->reply.sequence = vblwait->request.sequence;
}
DRM_DEBUG("event on vblank count %d, current %d, crtc %u\n",
vblwait->request.sequence, seq, pipe);
@ -1690,6 +1684,11 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
goto done;
}
if ((flags & _DRM_VBLANK_NEXTONMISS) &&
(seq - vblwait->request.sequence) <= (1 << 23)) {
vblwait->request.sequence = seq + 1;
}
if (flags & _DRM_VBLANK_EVENT) {
/* must hold on to the vblank ref until the event fires
* drm_vblank_put will be called asynchronously
@ -1697,11 +1696,6 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
return drm_queue_vblank_event(dev, pipe, vblwait, file_priv);
}
if ((flags & _DRM_VBLANK_NEXTONMISS) &&
(seq - vblwait->request.sequence) <= (1<<23)) {
vblwait->request.sequence = seq + 1;
}
DRM_DEBUG("waiting on vblank count %d, crtc %u\n",
vblwait->request.sequence, pipe);
vblank->last_wait = vblwait->request.sequence;