[PATCH v5 4/4] drm/fence: add out-fences support

[Gustavo Padovan]

2016-10-20 Ville Syrjälä <ville.syrjala at linux.intel.com>:

> On Thu, Oct 20, 2016 at 12:50:05PM -0200, Gustavo Padovan wrote:
> > From: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
> > 
> > Support DRM out-fences by creating a sync_file with a fence for each CRTC
> > that sets the OUT_FENCE_PTR property.
> 
> I still maintain the out fence should also be per fb (well, per plane
> since we can't add it to fbs). Otherwise it's not going to be at all
> useful if you do fps>vrefresh and don't include the same set of planes
> in every atomic ioctl, eg. if you only ever include ones that are
> somehow dirty.

How would the kernel signal these dirty planes then? Right now we signal
at the vblank.

Gustavo