[Intel-gfx] [PATCH 05/11] drm/i915/skl: Fail the flip if no FB for WM calculation

[Mahesh Kumar]

Hi,


On Monday 08 May 2017 05:18 PM, Lankhorst, Maarten wrote:
> Mahesh Kumar schreef op ma 08-05-2017 om 17:18 [+0530]:
>> Fail the flip if no FB is present but plane_state is set as visible.
>> Above is not a valid combination so instead of continue fail the
>> flip.
> Why is this patch necessary? drm_atomic_plane_check handles this.
Ideally we should never get such combination here. But current WM code 
checks for this situation and even if it's true it proceeds further. 
This patch just corrects the WM code flow decision.
I also think some of these checks are redundant here.

-Mahesh

>
> ~Maarten