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drm: rockchip: set alpha_en to 0 if it is not used

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[ Upstream commit 046e0db975 ]

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: 2aae8ed1f3 ("drm/rockchip: Add per-pixel alpha support for the PX30 VOP")
Signed-off-by: Alex Bee <knaerzche@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210528130554.72191-6-knaerzche@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Bee 2021-05-28 15:05:54 +02:00 • committed by Greg Kroah-Hartman
commit ef61b0826c
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/rockchip/rockchip_drm_vop.c
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@ -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);