diff mbox series

[v2,09/17] drm/mediatek: check if fb is null

Message ID 1607746317-4696-10-git-send-email-yongqiang.niu@mediatek.com (mailing list archive)
State New, archived
Headers show
Series drm/mediatek: add support for mediatek SOC MT8192 | expand

Commit Message

Yongqiang Niu Dec. 12, 2020, 4:11 a.m. UTC 
It's possible that state->base.fb is null. Add a check before access its
format.

Fixes: b6b1bb980ec4 ( drm/mediatek: Turn off Alpha bit when plane format has no alpha)
Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 97f8380..47ae98c 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -278,7 +278,7 @@  static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
 	}
 
 	con = ovl_fmt_convert(ovl, fmt);
-	if (state->base.fb->format->has_alpha)
+	if (state->base.fb && state->base.fb->format->has_alpha)
 		con |= OVL_CON_AEN | OVL_CON_ALPHA;
 
 	if (pending->rotation & DRM_MODE_REFLECT_Y) {