IMX Scaler / CSC m2m driver.

[Nicolas Dufresne]

Le lundi 23 mars 2015 à 11:39 +0100, Philipp Zabel a écrit :
> This is a hardware limintation. The videodec output is 1920x1088 with
> 8
> lines of garbage.
> The only way to scale that down to 1920x1080 for the IPU IC is to use
> the 2:1 downscaler (to 1920x544) and then use the bilinear upscaler to
> scale it back up to 1920x1080.
> 
> The decoder output should be cropped to 1920x1080 when feeding it into
> the scaler/csc.

Note that the decoder should already present caps as being 1920x1080 and
hide the padding through VideoMeta stride and offset array. It is more
likely that the converter patch that has been applied to add scaling is
not well tested and is leading to bugs.

Nicolas