If cursor plane has updated but primary plane config task is not
finished, mtk_drm_crtc_update_config will call mbox_flush() to clear
all task in current GCE thread and let cursor plane re-send a new
GCE task with cursor + primary plane config to replace the unfinished
GCE task.
So the plane config flag should not be cleared when mailbox callback
with a error status.
Fixes: 9efb16c2fdd6 ("drm/mediatek: Clear pending flag when cmdq packet is done")
Signed-off-by: jason-jh.lin <jason-jh.lin@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 274e5c67507d..b96dbc867890 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -281,6 +281,9 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
struct mtk_crtc_state *state;
unsigned int i;
+ if (data->sta < 0)
+ return;
+
state = to_mtk_crtc_state(mtk_crtc->base.state);
state->pending_config = false;
--
2.18.0
