linux-kernel - [PATCH 5.8 040/177] drm/sun4i: backend: Disable alpha on the lowest plane on the A20

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Date:   Tue, 15 Sep 2020 16:11:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Maxime Ripard <maxime@...no.tech>,
        Chen-Yu Tsai <wens@...e.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.8 040/177] drm/sun4i: backend: Disable alpha on the lowest plane on the A20

From: Maxime Ripard <maxime@...no.tech>

[ Upstream commit 5e2e2600a3744491a8b49b92597c13b693692082 ]

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: dcf496a6a608 ("drm/sun4i: sun4i: Introduce a quirk for lowest plane alpha support")
Signed-off-by: Maxime Ripard <maxime@...no.tech>
Reviewed-by: Chen-Yu Tsai <wens@...e.org>
Cc: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200728134810.883457-2-maxime@cerno.tech
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/sun4i/sun4i_backend.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 30672c4c634da..ed5d866178028 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -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 = {
-- 
2.25.1