[PATCH RFC v7 07/10] drm/atomic: Loosen FB atomic checks

[Maxime Ripard]

Hi,

On Fri, Oct 27, 2023 at 03:32:57PM -0700, Jessica Zhang wrote:
> Loosen the requirements for atomic and legacy commit so that, in cases
> where pixel_source != FB, the commit can still go through.
> 
> This includes adding framebuffer NULL checks in other areas to account for
> FB being NULL when non-FB pixel sources are enabled.
> 
> To disable a plane, the pixel_source must be NONE or the FB must be NULL
> if pixel_source == FB.
> 
> Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>

This breaks some plane kunit tests we have:

See https://lore.kernel.org/dri-devel/20231204173536.51003-1-naresh.kamboju@linaro.org/

Maxime
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