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Now that the drm_format_info has a alpha field to tell if a format embeds an alpha component in it, let's use it. Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/23518426a46320dd884465cebec0961f839f2972.1516617243.git-series.maxime.ripard@free-electrons.com