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drm/mediatek: Handle component type MTK_DISP_OVL_2L correctly

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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: b17bdd0d7a ("drm/mediatek: add component OVL_2L0")

Signed-off-by: Phong LE <ple@baylibre.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
Phong LE 2020-02-19 15:13:24 +01:00 committed by CK Hu
parent 839cbf0531
commit 3d2ed431b8
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
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@ -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;