drm/mediatek: Handle component type MTK_DISP_OVL_2L correctly

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 <[email protected]>
Signed-off-by: CK Hu <[email protected]>

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 1f5a112bb034d76ed145f09863b003bd6cb31a4a..57c88de9a3293447e70965c6628258f7c9f31e05 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -471,6 +471,7 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
        /* 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;