| Message ID | 20200622150109.91205-1-hsinyi@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] drm/mediatek: check plane visibility in atomic_update | expand |
On Mon, Jun 22, 2020 at 11:20 PM Tomasz Figa <tfiga@chromium.org> wrote: > > Hi Hsin-Yi, > > On Mon, Jun 22, 2020 at 11:01:09PM +0800, 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 <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(-) > > > > Thank you for the patch. Please see my comments inline. > > > 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); > > nit: Both this function and mtk_plane_atomic_disable() have the void return > type. Perhaps we should rather move the return, without a value, to a > separate statement? Updated in v3, thanks. > > Best regards, > Tomasz
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,
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(-)