Re: [RFC v2 5/8] drm/fence: add in-fences support

[Daniel Vetter]

On Thu, Apr 28, 2016 at 6:56 PM, Ville SyrjÃlÃ
<ville.syrjala@xxxxxxxxxxxxxxx> wrote:
>>  - better for tracing, can identify the buffer/fence promptly
>
> Can fences be reused somehow while still attached to a plane, or ever?
> That might cause some oddness if you, say, leave a fence attached to one
> plane and then do a modeset on another crtc perhaps which needs to turn
> the first crtc off+on to reconfigure something.

Fences auto-disappear of course and don't stick around when you
duplicate the drm_plane_state again. I still don't really get the real
concerns though ... In the end it's purely a transport question, and
both ABI ideas work out semantically exactly the same in the end. It's
just that at least in my opinion FENCE_FD prop is a lot more
convenient.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch