From: Phong LE <ple@xxxxxxxxxxxx>
commit 3d2ed431b8f39483477bc3c3a2aefbc9778ffe12 upstream.
The larb device remains NULL if the type is MTK_DISP_OVL_2L.
A kernel panic is raised when a crtc uses mtk_smi_larb_get or
mtk_smi_larb_put.
Fixes: b17bdd0d7a73 ("drm/mediatek: add component OVL_2L0")
Signed-off-by: Phong LE <ple@xxxxxxxxxxxx>
Signed-off-by: CK Hu <ck.hu@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -358,6 +358,7 @@ int mtk_ddp_comp_init(struct device *dev
/* Only DMA capable components need the LARB property */
comp->larb_dev = NULL;
if (type != MTK_DISP_OVL &&
+ type != MTK_DISP_OVL_2L &&
type != MTK_DISP_RDMA &&
type != MTK_DISP_WDMA)
return 0;
