Disable the plane if it's not visible. Otherwise mtk_ovl_layer_config() would proceed with invalid plane and we may see vblank timeout.

Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.") Signed-off-by: Hsin-Yi Wang hsinyi@chromium.org Reviewed-by: Chun-Kuang Hu chunkuang.hu@kernel.org --- v2: Add fixes tag --- drivers/gpu/drm/mediatek/mtk_drm_plane.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c index c2bd683a87c8..74dc71c7f3b6 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c @@ -164,6 +164,16 @@ static int mtk_plane_atomic_check(struct drm_plane *plane, true, true); }

+static void mtk_plane_atomic_disable(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct mtk_plane_state *state = to_mtk_plane_state(plane->state); + + state->pending.enable = false; + wmb(); /* Make sure the above parameter is set before update */ + state->pending.dirty = true; +} + static void mtk_plane_atomic_update(struct drm_plane *plane, struct drm_plane_state *old_state) { @@ -178,6 +188,9 @@ static void mtk_plane_atomic_update(struct drm_plane *plane, if (!crtc || WARN_ON(!fb)) return;

+ if (!plane->state->visible) + return mtk_plane_atomic_disable(plane, old_state); + gem = fb->obj[0]; mtk_gem = to_mtk_gem_obj(gem); addr = mtk_gem->dma_addr; @@ -200,16 +213,6 @@ static void mtk_plane_atomic_update(struct drm_plane *plane, state->pending.dirty = true; }

-static void mtk_plane_atomic_disable(struct drm_plane *plane, - struct drm_plane_state *old_state) -{ - struct mtk_plane_state *state = to_mtk_plane_state(plane->state); - - state->pending.enable = false; - wmb(); /* Make sure the above parameter is set before update */ - state->pending.dirty = true; -} - static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = { .prepare_fb = drm_gem_fb_prepare_fb, .atomic_check = mtk_plane_atomic_check,