Boris Brezillon <boris.brezillon@bootlin.com> writes:

> This is needed to ensure ->is_unity is correct when the plane was
> previously configured to output a multi-planar format with scaling
> enabled, and is then being reconfigured to output a uniplanar format.
>
> Fixes: fc04023fafec ("drm/vc4: Add support for YUV planes.")
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>

Reviewed-by: Eric Anholt <eric@anholt.net>