[Intel-gfx] [PATCH] Revert "drm/i915: Use atomic commits for legacy page_flips"

[Daniel Stone]

Hi Chris,

On 24 June 2016 at 22:44, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> This reverts commit ee042aa40b66d18d465206845b0752c6a617ba3f.
>
> Something appears to be off in the timing, but as far as I can tell it
> is not along the event delivery path. The net effect appears to be
> rendering flicker (the current render buffer appears on the scanout,
> with what appears to be active rendering for a fraction of a frame) and
> is causing me a headache.

Does this change at all with the fixup in
https://lists.freedesktop.org/archives/intel-gfx/2016-June/099466.html
?

I was seeing no waits whatsoever for rendering, causing active
rendering to be visible towards positive x and negative y (top-right
corner) with this.

> The cursor is also being stalled by page flips, causing a "heavy mouse"
> and jitter.

This I can't attest to though.

Cheers,
Daniel