drm: mali-dp: Enable alpha blending

Always enable pixel-level alpha blending with the background, so that
buffers which include an alpha channel are displayed correctly.

Signed-off-by: Brian Starkey <brian.starkey@arm.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
This commit is contained in:
Brian Starkey 2016-10-11 15:26:08 +01:00 • committed by Liviu Dudau
commit c57eb710b6