This is a note to let you know that I've just added the patch titled
drm/rockchip: vop2: Fix the mixer alpha setup for layer 0
to the 6.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-rockchip-vop2-fix-the-mixer-alpha-setup-for-laye.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b7861563f29d9898b4ecb0db477cf59815a0946a
Author: Andy Yan <andy.yan@xxxxxxxxxxxxxx>
Date: Mon Dec 9 20:29:16 2024 +0800
drm/rockchip: vop2: Fix the mixer alpha setup for layer 0
[ Upstream commit 6b4dfdcde3573a12b72d2869dabd4ca37ad7e9c7 ]
The alpha setup should start from the second layer, the current calculation
starts incorrectly from the first layer, a negative offset will be obtained
in the following formula:
offset = (mixer_id + zpos - 1) * 0x10
Fixes: 604be85547ce ("drm/rockchip: Add VOP2 driver")
Tested-by: Derek Foreman <derek.foreman@xxxxxxxxxxxxx>
Signed-off-by: Andy Yan <andy.yan@xxxxxxxxxxxxxx>
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20241209122943.2781431-7-andyshrk@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 594923303a850..630a204440ba8 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -2248,6 +2248,12 @@ static void vop2_setup_alpha(struct vop2_video_port *vp)
struct vop2_win *win = to_vop2_win(plane);
int zpos = plane->state->normalized_zpos;
+ /*
+ * Need to configure alpha from second layer.
+ */
+ if (zpos == 0)
+ continue;
+
if (plane->state->pixel_blend_mode == DRM_MODE_BLEND_PREMULTI)
premulti_en = 1;
else
