Re: [PATCH v2 1/2] drm/vc4: ->x_scaling[1] should never be set to VC4_SCALING_NONE

On Fri, 9 Nov 2018 11:26:32 +0100 Boris Brezillon wrote: > For the YUV conversion to work properly, ->x_scaling[1] should never > be set to VC4_SCALING_NONE, but vc4_get_scaling_mode() might return > VC4_SCALING_NONE if the horizontal scaling ratio exactly matches the > horizontal subsampling fa

[PATCH v2 1/2] drm/vc4: ->x_scaling[1] should never be set to VC4_SCALING_NONE

For the YUV conversion to work properly, ->x_scaling[1] should never be set to VC4_SCALING_NONE, but vc4_get_scaling_mode() might return VC4_SCALING_NONE if the horizontal scaling ratio exactly matches the horizontal subsampling factor. Add a test to turn VC4_SCALING_NONE into VC4_SCALING_PPF when