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drm: Reorganize drm_pending_event to support future event types [v2]

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Place drm_event_vblank in a new union that includes that and a bare
drm_event structure. This will allow new members of that union to be
added in the future without changing code related to the existing vbl
event type.

Assignments to the crtc_id field are now done when the event is
allocated, rather than when delievered. This way, delivery doesn't
need to have the crtc ID available.

v2:
 * Remove 'dev' argument from create_vblank_event

	It wasn't being used anyways, and if we need it in the future,
	we can always get it from crtc->dev.

 * Check for MODESETTING before looking for crtc in queue_vblank_event

	UMS drivers will oops if we try to get a crtc, so make sure
	we're modesetting before we try to find a crtc_id to fill into
	the event.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit dc695b85fde88eca3ef3b03fcd82f15b6bc6e462)
This commit is contained in:
Keith Packard
2017-07-05 14:34:23 -07:00
committed by Dave Airlie
parent 570e86963a
commit bd386e5180
6 changed files with 40 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/gpu/drm/drm_vblank.c
View File

@@ -804,20 +804,23 @@ static void send_vblank_event(struct drm_device *dev,
struct drm_pending_vblank_event *e,
u64 seq, ktime_t now)
{
struct timespec64 tv = ktime_to_timespec64(now);
e->event.sequence = seq;
/*
* e->event is a user space structure, with hardcoded unsigned
* 32-bit seconds/microseconds. This is safe as we always use
* monotonic timestamps since linux-4.15
*/
e->event.tv_sec = tv.tv_sec;
e->event.tv_usec = tv.tv_nsec / 1000;
trace_drm_vblank_event_delivered(e->base.file_priv, e->pipe,
e->event.sequence);
struct timespec64 tv;
switch (e->event.base.type) {
case DRM_EVENT_VBLANK:
case DRM_EVENT_FLIP_COMPLETE:
tv = ktime_to_timespec64(now);
e->event.vbl.sequence = seq;
/*
* e->event is a user space structure, with hardcoded unsigned
* 32-bit seconds/microseconds. This is safe as we always use
* monotonic timestamps since linux-4.15
*/
e->event.vbl.tv_sec = tv.tv_sec;
e->event.vbl.tv_usec = tv.tv_nsec / 1000;
break;
}
trace_drm_vblank_event_delivered(e->base.file_priv, e->pipe, seq);
drm_send_event_locked(dev, &e->base);
}
@@ -869,7 +872,6 @@ void drm_crtc_arm_vblank_event(struct drm_crtc *crtc,
e->pipe = pipe;
e->sequence = drm_crtc_accurate_vblank_count(crtc) + 1;
e->event.crtc_id = crtc->base.id;
list_add_tail(&e->base.link, &dev->vblank_event_list);
}
EXPORT_SYMBOL(drm_crtc_arm_vblank_event);
@@ -901,7 +903,6 @@ void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
now = ktime_get();
}
e->pipe = pipe;
e->event.crtc_id = crtc->base.id;
send_vblank_event(dev, e, seq, now);
}
EXPORT_SYMBOL(drm_crtc_send_vblank_event);
@@ -1336,8 +1337,14 @@ static int drm_queue_vblank_event(struct drm_device *dev, unsigned int pipe,
e->pipe = pipe;
e->event.base.type = DRM_EVENT_VBLANK;
e->event.base.length = sizeof(e->event);
e->event.user_data = vblwait->request.signal;
e->event.base.length = sizeof(e->event.vbl);
e->event.vbl.user_data = vblwait->request.signal;
e->event.vbl.crtc_id = 0;
if (drm_core_check_feature(dev, DRIVER_MODESET)) {
struct drm_crtc *crtc = drm_crtc_from_index(dev, pipe);
if (crtc)
e->event.vbl.crtc_id = crtc->base.id;
}
spin_lock_irqsave(&dev->event_lock, flags);