Re: [PATCH] drm/vc4: Fix the "no scaling" case on multi-planar YUV formats

Boris Brezillon boris.brezillon@bootlin.com writes:

When there's no scaling requested ->is_unity should be true no matter the format.

Also, when no scaling is requested and we have a multi-planar YUV format, we should leave ->y_scaling[0] to VC4_SCALING_NONE and only set ->x_scaling[0] to VC4_SCALING_PPF.

Doing this fixes an hardly visible artifact (seen when using modetest and a rather big overlay plane in YUV420).

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