diff options
| -rw-r--r-- | src/sna/sna_present.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/sna/sna_present.c b/src/sna/sna_present.c index d27c9125..3998043a 100644 --- a/src/sna/sna_present.c +++ b/src/sna/sna_present.c @@ -147,12 +147,15 @@ static uint32_t msc_to_delay(xf86CrtcPtr crtc, uint64_t target) delay = target - swap->msc; assert(delay >= 0); - if (delay > 1) /* try to use the hw vblank for the last frame */ + if (delay > 1) { /* try to use the hw vblank for the last frame */ delay--; + subframe = 0; + } else { + subframe = gettime_ust64() - swap_ust(swap); + subframe += 500; + subframe /= 1000; + } delay *= mode->VTotal * mode->HTotal / mode->Clock; - subframe = gettime_ust64() - swap_ust(swap); - subframe += 500; - subframe /= 1000; if (subframe < delay) delay -= subframe; else |