Blending win0 with the background color doesn't seem to work
correctly. We only get the background color, no matter the contents of
the win0 framebuffer. However, blending pre-multiplied color with the
default opaque black default background color is a no-op, so we can
just disable blending to get the correct result.
Signed-off-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180418173152.93246-1-hoegsberg@chromium.org
58badaa778