[Bug 68718] [snb] vsync hang
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Feb 11 08:20:41 PST 2014
https://bugs.freedesktop.org/show_bug.cgi?id=68718
--- Comment #20 from Chris Wilson <chris at chris-wilson.co.uk> ---
Guessing now, but maybe try this delta patch on top:
diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index 99afbd1..2620669 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -3984,7 +3984,7 @@ static bool sna_emit_wait_for_scanline_gen6(struct sna
*sna,
b = kgem_get_batch(&sna->kgem);
/* Both the LRI and WAIT_FOR_EVENT must be in the same cacheline */
- if (((sna->kgem.nbatch + 6) >> 4) != (sna->kgem.nbatch + 9) >> 4) {
+ if (((sna->kgem.nbatch + 6) >> 3) != (sna->kgem.nbatch + 10) >> 3) {
int dw = sna->kgem.nbatch + 6;
dw = ALIGN(dw, 16) - dw;
while (dw--)
I think the cacheline it mentions is 64bytes, but we may as check against
32bytes just in case.
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