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From:   Alex Bee <knaerzche@gmail.com>
To:     Sandy Huang <hjc@rock-chips.com>,
        =?UTF-8?q?Heiko=20St=C3=BCbner=20?= <heiko@sntech.de>
Cc:     Alex Bee <knaerzche@gmail.com>, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 4/5] drm: rockchip: set alpha_en to 0 if it is not used
Date:   Wed, 22 Jul 2020 20:13:31 +0200
Message-Id: <20200722181332.26995-5-knaerzche@gmail.com>
In-Reply-To: <20200722181332.26995-1-knaerzche@gmail.com>
References: <20200722181332.26995-1-knaerzche@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

alpha_en should be set to 0 if it is not used, i.e. to disable alpha
blending if it was enabled before and should be disabled now.

Fixes: 2aae8ed1f390 ("drm/rockchip: Add per-pixel alpha support for the PX30 VOP")

Signed-off-by: Alex Bee <knaerzche@gmail.com>
---

Changes in v2:
- capitalize "F" of "Fixes" in the commit message

 drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index c80f7d9fd13f..0f23144491e4 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -1013,6 +1013,7 @@ static void vop_plane_atomic_update(struct drm_plane *plane,
 		VOP_WIN_SET(vop, win, alpha_en, 1);
 	} else {
 		VOP_WIN_SET(vop, win, src_alpha_ctl, SRC_ALPHA_EN(0));
+		VOP_WIN_SET(vop, win, alpha_en, 0);
 	}
 
 	VOP_WIN_SET(vop, win, enable, 1);
-- 
2.17.1