present: Execute right away if target_msc equals current_msc

It is according to the protocol:

"If 'options' contains PresentOptionAsync, and the 'target-msc'
is less than or equal to the current msc for 'window', then
the operation will be performed as soon as possible, not
necessarily waiting for the next vertical blank interval."

Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Axel Davy <axel.davy@ens.fr>
This commit is contained in:
Jammy Zhou 2015-10-28 18:39:10 +08:00 committed by Adam Jackson
parent 7d1e478385
commit 3f35909acb

View File

@ -871,7 +871,7 @@ present_pixmap(WindowPtr window,
xorg_list_add(&vblank->event_queue, &present_exec_queue);
vblank->queued = TRUE;
if ((pixmap && target_msc >= crtc_msc) || (!pixmap && target_msc > crtc_msc)) {
if (target_msc > crtc_msc) {
ret = present_queue_vblank(screen, target_crtc, vblank->event_id, target_msc);
if (ret == Success)
return Success;