On 4 August 2016 at 04:39, Michel Dänzer <mic...@daenzer.net> wrote:
> Patch 6 extends the ioctl with new flags, which allow userspace to
> explicitly specify the target vblank seqno. This can also avoid delaying
> flips in some cases where we are already in the target vertical blank
> period when the ioctl is called.

Is there open userspace for this? What's the behaviour vs. modeset:
does the modeset request block until the last-requested flip is
complete? If so, is there some kind of upper bound on the number of
blank periods to wait for? Is wraparound handled properly? Is all this
tested somewhere?

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