Aurelien
/
xf86-video-intel
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sna/dri: Tweak vblank_mode=n swapbuffers to account for throttle delay 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-05-28 09:48:49 +01:00
parent 45148a714f
commit b025f1a604
1 changed files with 4 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/sna/sna_dri.c
View File

@ -1665,26 +1665,22 @@ sna_dri_schedule_swap(ClientPtr client, DrawablePtr draw, DRI2BufferPtr front,
(int)*target_msc,
(int)divisor));
vbl.request.type = DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT;
vbl.request.type |= DRM_VBLANK_NEXTONMISS;
vbl.request.type =
DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT | DRM_VBLANK_NEXTONMISS;
if (pipe > 0)
vbl.request.type |= DRM_VBLANK_SECONDARY;
vbl.request.sequence = current_msc - current_msc % divisor + remainder;
/*
* If the calculated deadline vbl.request.sequence is smaller than
* or equal to current_msc, it means we've passed the last point
* when effective onset frame seq could satisfy
* seq % divisor == remainder, so we need to wait for the next time
* this will happen.
*
* This comparison takes the 1 frame swap delay in pageflipping mode
* into account, as well as a potential DRM_VBLANK_NEXTONMISS delay
* if we are blitting/exchanging instead of flipping.
*/
if (vbl.request.sequence <= current_msc)
if (vbl.request.sequence < current_msc)
vbl.request.sequence += divisor;
vbl.request.sequence -= 1;
vbl.request.signal = (unsigned long)info;
if (drmWaitVBlank(sna->kgem.fd, &vbl))