6.6-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 0ca953ac226eaffbe1a795f5e517095a8d494921 ]
Every layer of vop2 should bind a window, and we also need to make sure that this window is not used by other layer.
0x5 is a reserved layer sel value on rk3568, but it will select Cluster3 on rk3588, configure unused layers to 0x5 will lead alpha blending error on rk3588.
When we bind a window from layerM to layerN, we move the old window on layerN to layerM.
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/20241214081719.3330518-3-andys... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 47 ++++++++++++++------ 1 file changed, 34 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c index 1295aaffe868a..724b75cfb6b5b 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c @@ -1924,7 +1924,10 @@ static void vop2_setup_layer_mixer(struct vop2_video_port *vp) struct drm_plane *plane; u32 layer_sel = 0; u32 port_sel; - unsigned int nlayer, ofs; + u8 layer_id; + u8 old_layer_id; + u8 layer_sel_id; + unsigned int ofs; u32 ovl_ctrl; int i; struct vop2_video_port *vp0 = &vop2->vps[0]; @@ -1968,9 +1971,30 @@ static void vop2_setup_layer_mixer(struct vop2_video_port *vp) for (i = 0; i < vp->id; i++) ofs += vop2->vps[i].nlayers;
- nlayer = 0; drm_atomic_crtc_for_each_plane(plane, &vp->crtc) { struct vop2_win *win = to_vop2_win(plane); + struct vop2_win *old_win; + + layer_id = (u8)(plane->state->normalized_zpos + ofs); + + /* + * Find the layer this win bind in old state. + */ + for (old_layer_id = 0; old_layer_id < vop2->data->win_size; old_layer_id++) { + layer_sel_id = (layer_sel >> (4 * old_layer_id)) & 0xf; + if (layer_sel_id == win->data->layer_sel_id) + break; + } + + /* + * Find the win bind to this layer in old state + */ + for (i = 0; i < vop2->data->win_size; i++) { + old_win = &vop2->win[i]; + layer_sel_id = (layer_sel >> (4 * layer_id)) & 0xf; + if (layer_sel_id == old_win->data->layer_sel_id) + break; + }
switch (win->data->phys_id) { case ROCKCHIP_VOP2_CLUSTER0: @@ -1999,17 +2023,14 @@ static void vop2_setup_layer_mixer(struct vop2_video_port *vp) break; }
- layer_sel &= ~RK3568_OVL_LAYER_SEL__LAYER(plane->state->normalized_zpos + ofs, - 0x7); - layer_sel |= RK3568_OVL_LAYER_SEL__LAYER(plane->state->normalized_zpos + ofs, - win->data->layer_sel_id); - nlayer++; - } - - /* configure unused layers to 0x5 (reserved) */ - for (; nlayer < vp->nlayers; nlayer++) { - layer_sel &= ~RK3568_OVL_LAYER_SEL__LAYER(nlayer + ofs, 0x7); - layer_sel |= RK3568_OVL_LAYER_SEL__LAYER(nlayer + ofs, 5); + layer_sel &= ~RK3568_OVL_LAYER_SEL__LAYER(layer_id, 0x7); + layer_sel |= RK3568_OVL_LAYER_SEL__LAYER(layer_id, win->data->layer_sel_id); + /* + * When we bind a window from layerM to layerN, we also need to move the old + * window on layerN to layerM to avoid one window selected by two or more layers. + */ + layer_sel &= ~RK3568_OVL_LAYER_SEL__LAYER(old_layer_id, 0x7); + layer_sel |= RK3568_OVL_LAYER_SEL__LAYER(old_layer_id, old_win->data->layer_sel_id); }
vop2_writel(vop2, RK3568_OVL_LAYER_SEL, layer_sel);