On 22/06/2020 17:31, Hsin-Yi Wang wrote:
> 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 <hsi...@chromium.org>
> Reviewed-by: Chun-Kuang Hu <chunkuang...@kernel.org>
> Change-Id: Id5341d60ddfffc88a38d9db0caa089b2d6a1d29c
Seems like the Change-Id slipped in now.
Regards,
Matthias
> ---
> v3: Address comment
> v2: Add fixes tag
> ---
> drivers/gpu/drm/mediatek/mtk_drm_plane.c | 25 ++++++++++++++----------
> 1 file changed, 15 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..92141a19681b 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 +188,11 @@ static void mtk_plane_atomic_update(struct drm_plane
> *plane,
> if (!crtc || WARN_ON(!fb))
> return;
>
> + if (!plane->state->visible) {
> + mtk_plane_atomic_disable(plane, old_state);
> + return;
> + }
> +
> gem = fb->obj[0];
> mtk_gem = to_mtk_gem_obj(gem);
> addr = mtk_gem->dma_addr;
> @@ -200,16 +215,6 @@ 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,
>
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