drm/mediatek: add function to get layer number for component

This patch add function to get layer number for component

Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 7413ffeb3c9d..8399229e6ad2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -78,6 +78,7 @@ struct mtk_ddp_comp_funcs {
         void (*stop)(struct mtk_ddp_comp *comp);
         void (*enable_vblank)(struct mtk_ddp_comp *comp, struct drm_crtc *crtc);
         void (*disable_vblank)(struct mtk_ddp_comp *comp);
+        unsigned int (*layer_nr)(struct mtk_ddp_comp *comp);
         void (*layer_on)(struct mtk_ddp_comp *comp, unsigned int idx);
         void (*layer_off)(struct mtk_ddp_comp *comp, unsigned int idx);
         void (*layer_config)(struct mtk_ddp_comp *comp, unsigned int idx,
@@ -128,6 +129,14 @@ static inline void mtk_ddp_comp_disable_vblank(struct mtk_ddp_comp *comp)
                 comp->funcs->disable_vblank(comp);
 }
 
+static inline unsigned int mtk_ddp_comp_layer_nr(struct mtk_ddp_comp *comp)
+{
+        if (comp->funcs && comp->funcs->layer_nr)
+                return comp->funcs->layer_nr(comp);
+
+        return 0;
+}
+
 static inline void mtk_ddp_comp_layer_on(struct mtk_ddp_comp *comp,
                                          unsigned int idx)
 {