[Intel-gfx] [PATCH] UXA: Wait until a pageflip actually completes to report it.

[Jamey Sharp]

On Wed, May 07, 2014 at 04:55:18PM +0100, Chris Wilson wrote:
> On Mon, May 05, 2014 at 11:05:07PM -0700, Jamey Sharp wrote:
> > UXA was reporting page-flip completion as soon as the flip was scheduled
> > with the kernel, instead of waiting for the kernel to indicate that the
> > flip had actually completed.
> > 
> > Moving the DRI2SwapComplete call to the right place fixes all of our
> > Piglit tests for OML_sync_control when run on xf86-video-intel/UXA,
> > aside from a bit of difficult-to-reproduce flakiness when using a
> > divisor > 1.
> 
> The violation is intentional, as it gives us triple buffering by
> default. It can be disabled.

As far as I can tell, this patch has no effect on triple-buffering. I
verified that by logging new_front->handle in intel_do_pageflip: It
rotates through three different BO's on successive flips.

Jamey
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