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drm/mediatek: Check plane visibility in atomic_update

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[ Upstream commit c0b8892e24 ]

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: 119f517362 ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hsin-Yi Wang 2020-06-22 23:57:53 +08:00 committed by Greg Kroah-Hartman
parent a062088e67
commit 4625f4d5e4
1 changed files with 15 additions and 10 deletions
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25
drivers/gpu/drm/mediatek/mtk_drm_plane.c
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@ -101,6 +101,16 @@ 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)
{
@ -115,6 +125,11 @@ 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;
@ -136,16 +151,6 @@ 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,