6.12-stable review patch. If anyone has any objections, please let me know.
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From: Andy Yan andy.yan@rock-chips.com
[ 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@collabora.com Signed-off-by: Andy Yan andy.yan@rock-chips.com Signed-off-by: Heiko Stuebner heiko@sntech.de Link: https://patchwork.freedesktop.org/patch/msgid/20241209122943.2781431-7-andys... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 6 ++++++ 1 file changed, 6 insertions(+)
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