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drm/sun4i: backend: Disable alpha on the lowest plane on the A20 

Unlike we previously thought, the per-pixel alpha is just as broken on the
A20 as it is on the A10. Remove the quirk that says we can use it.

Fixes: dcf496a6a6 ("drm/sun4i: sun4i: Introduce a quirk for lowest plane alpha support")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Cc: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200728134810.883457-2-maxime@cerno.tech
zero-sugar-mainline-defconfig
Maxime Ripard 2020-07-28 15:48:10 +02:00
parent e359c70462
commit 5e2e2600a3
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drivers/gpu/drm/sun4i/sun4i_backend.c
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@ -994,7 +994,6 @@ static const struct sun4i_backend_quirks sun6i_backend_quirks = {
static const struct sun4i_backend_quirks sun7i_backend_quirks = {
.needs_output_muxing = true,
.supports_lowest_plane_alpha = true,
};
static const struct sun4i_backend_quirks sun8i_a33_backend_quirks = {