Quoting Ville Syrjala (2018-05-29 19:33:15)
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
> 
> When we're trying to reinstate the colorkey we might fail on account of
> the plane still being enable with a configuration that prevent the
> use of colorkey. This happens easily with NV12 since the plane scaler
> required by even unscaled NV12 is not compatible with colorkey.
> 
> To work around the problem let's try disabling the plane first, then
> re-enable the colorkey, and finally we will try to re-enable the plane.
> The plane re-enable may fail, in which case we'll head to the GPU
> scaling fallback path. The cost is a flash of the colorkey when the
> plane blink off and then back on.
> 
> Help me atomic ioctl, you're my only hope!
> 
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>

Though I glazed over at the asm patches, I concur that merely adding
further crud is the easiest way to add colorspace encoding support. The
rest of the patches looked fine, so the series is

Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>

Thanks,
-Chris
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