Re: [PATCH 7/8] drm/i915/display/skl+: Drop frontbuffer rendering support

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On Tue, Aug 17, 2021 at 05:42:15PM -0700, José Roberto de Souza wrote:
> By now all the userspace applications should have migrated to atomic
> or at least be calling DRM_IOCTL_MODE_DIRTYFB.
> 
> With that we can kill frontbuffer rendering support in i915 for
> modern platforms.
> 
> So here converting legacy APIs into atomic commits so it can be
> properly handled by driver i915.
> 
> Several IGT tests will fail with this changes, because some tests
> were stressing those frontbuffer rendering scenarios that no userspace
> should be using by now, fixes to IGT should be sent soon.

Blocking atomic commits instead of the current lightweight frontbuffer
interface sounds like a terrible plan. How unusable is X with this
approach?

-- 
Ville Syrjälä
Intel



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