Maxime Ripard <> writes:

> The vc4 HVS uses an internal RGB888 representation of the frames, and will
> by default expand formats using a lower depth using zeros.
> This causes an issue when we try to use other compositing software such as
> pixman that fill the missing bits by repeating the higher significant bits.
> As such, we can't check the display output in a reliable way by doing a
> software composition and an hardware one and compare both.
> To prevent this, force the same behaviour so that we can do such things.

Pushed to drm-misc-next.  Thanks!

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