[PATCH 14/17] drm/msm: add atomic support

[Rob Clark]

On Tue, May 27, 2014 at 6:09 PM, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Tue, May 27, 2014 at 04:06:28PM -0400, Rob Clark wrote:
>> On Tue, May 27, 2014 at 3:26 PM, Daniel Vetter <daniel at ffwll.ch> wrote:
>
> [snip]
>
>> Well, there was the NONBLOCK atomic flag.. I'm not entirely sure if we
>> should hang so much off of that one flag.
>
> Yeah, a separate VBLANK_SYNCED might be useful. Apparently people also
> want non-blocking modesets.

random-diverging-from-original-topic-thought.. seems like userspace
just wants a deadline/timeout (hopefully in units of vblanks).. at
least to the level of "I want this to happen on the next vblank (after
rendering completes), or give me an error" vs "I want this to complete
atomically even if it takes a few extra vblanks for things to sort
out"..

I guess that amounts to what you mean by VBLANK_SYNCED flag, but
VBLANKED_SYNCED might not be a good name.. at least for some hw all
you can do is vblank sync'd..

BR,
-R