6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jason-JH.Lin jason-jh.lin@mediatek.com
[ Upstream commit 3ec71e05ae6e7f46512e568ed81c92be589003dd ]
According to the comment in drm_atomic_helper_async_commit(), we should make sure FBs have been swapped, so that cleanups in the new_state performs a cleanup in the old FB.
So we should move swapping FBs after calling mtk_plane_update_new_state(), to avoid using the old FB which could be freed.
Fixes: 1a64a7aff8da ("drm/mediatek: Fix cursor plane no update") Signed-off-by: Jason-JH.Lin jason-jh.lin@mediatek.com Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Reviewed-by: CK Hu ck.hu@mediatek.com Reviewed-by: Alexandre Mergnat amergnat@baylibre.com Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20230809125722.241... Signed-off-by: Chun-Kuang Hu chunkuang.hu@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/mediatek/mtk_drm_plane.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c index 5acb03b7c6fe5..ddc9355b06d51 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c @@ -227,9 +227,9 @@ static void mtk_plane_atomic_async_update(struct drm_plane *plane, plane->state->src_y = new_state->src_y; plane->state->src_h = new_state->src_h; plane->state->src_w = new_state->src_w; - swap(plane->state->fb, new_state->fb);
mtk_plane_update_new_state(new_state, new_plane_state); + swap(plane->state->fb, new_state->fb); wmb(); /* Make sure the above parameters are set before update */ new_plane_state->pending.async_dirty = true; mtk_drm_crtc_async_update(new_state->crtc, plane, state);