<pre>
This patch add ovl0/ovl0_2l usecase

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 38 ++++++++++++++++++++++++++++++---
 1 file changed, 35 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index a5af4be..25cf063 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -283,6 +283,15 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
 
        for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
                struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
+               enum mtk_ddp_comp_id prev = DDP_COMPONENT_ID_MAX;
+
+               if (i > 0) {
+                       struct mtk_ddp_comp *comp_prev;
+
+                       comp_prev = mtk_crtc->ddp_comp[i - 1];
+                       prev = comp_prev->id;
+               }
+               mtk_ddp_comp_connect(comp, prev);
 
                mtk_ddp_comp_config(comp, width, height, vrefresh, bpc);
                mtk_ddp_comp_start(comp);
@@ -292,10 +301,19 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
        for (i = 0; i < mtk_crtc->layer_nr; i++) {
                struct drm_plane *plane = &mtk_crtc->planes[i];
                struct mtk_plane_state *plane_state;
+               struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
+               unsigned int comp_layer_nr = mtk_ddp_comp_layer_nr(comp);
+               unsigned int local_layer = 0;
 
                plane_state = to_mtk_plane_state(plane->state);
-               mtk_ddp_comp_layer_config(mtk_crtc->ddp_comp[0], i,
-                                         plane_state);
+
+               if (i >= comp_layer_nr) {
+                       comp = mtk_crtc->ddp_comp[1];
+                       local_layer = i - comp_layer_nr;
+               } else {
+                       local_layer = i;
+               }
+               mtk_ddp_comp_layer_config(comp, local_layer, plane_state);
        }
 
        return 0;
@@ -340,6 +358,8 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
        struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
        struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
        unsigned int i;
+       unsigned int comp_layer_nr = mtk_ddp_comp_layer_nr(comp);
+       unsigned int local_layer = 0;
 
        /*
         * TODO: instead of updating the registers here, we should prepare
@@ -362,7 +382,15 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
                        plane_state = to_mtk_plane_state(plane->state);
 
                        if (plane_state->pending.config) {
-                               mtk_ddp_comp_layer_config(comp, i, plane_state);
+                               if (i >= comp_layer_nr) {
+                                       comp = mtk_crtc->ddp_comp[1];
+                                       local_layer = i - comp_layer_nr;
+                               } else {
+                                       local_layer = i;
+                               }
+
+                               mtk_ddp_comp_layer_config(comp, local_layer,
+                                                         plane_state);
                                plane_state->pending.config = false;
                        }
                }
@@ -604,6 +632,10 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
        }
 
        mtk_crtc->layer_nr = mtk_ddp_comp_layer_nr(mtk_crtc->ddp_comp[0]);
+       if (mtk_crtc->ddp_comp_nr > 1 &&
+           mtk_ddp_comp_get_type(mtk_crtc->ddp_comp[1]->id) == MTK_DISP_OVL)
+               mtk_crtc->layer_nr +=
+               mtk_ddp_comp_layer_nr(mtk_crtc->ddp_comp[1]);
        mtk_crtc->planes = devm_kcalloc(dev, mtk_crtc->layer_nr,
                                        sizeof(struct drm_plane),
                                        GFP_KERNEL);
-- 
1.8.1.1.dirty

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