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Android Hardware Composer supports alpha values applied to layers. Enabling non-opaque layers for the STM CRTC could help offload GPU resources for screen composition. Signed-off-by: Raphael Gallais-Pou <[email protected]> Acked-by: Yannick Fertre <[email protected]> Reviewed-by: Yannick Fertre <[email protected]> Signed-off-by: Philippe Cornu <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]