[RESEND PATCH v1 14/18] drm/mediatek: add connect function for ovl

[<yongqiang.niu@mediatek.com>]

From: Yongqiang Niu <yongqiang.niu@mediatek.com>

This patch add connect function for ovl

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index a0ab760..3b2ce77 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -27,6 +27,8 @@
 #define DISP_REG_OVL_EN				0x000c
 #define DISP_REG_OVL_RST			0x0014
 #define DISP_REG_OVL_ROI_SIZE			0x0020
+#define DISP_REG_OVL_DATAPATH_CON		0x0024
+#define OVL_BGCLR_SEL_IN                        BIT(2)
 #define DISP_REG_OVL_ROI_BGCLR			0x0028
 #define DISP_REG_OVL_SRC_CON			0x002c
 #define DISP_REG_OVL_CON(n)			(0x0030 + 0x20 * (n))
@@ -245,6 +247,19 @@ static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
 		mtk_ovl_layer_on(comp, idx);
 }
 
+static void mtk_ovl_connect(struct mtk_ddp_comp *comp,
+			    enum mtk_ddp_comp_id prev)
+{
+	int is_ovl = 0;
+
+	if (prev == DDP_COMPONENT_OVL0 || prev == DDP_COMPONENT_OVL1 ||
+	    prev == DDP_COMPONENT_OVL0_2L || prev == DDP_COMPONENT_OVL1_2L)
+		is_ovl = 1;
+
+	mtk_ddp_write_mask((is_ovl << 2), comp,
+			   DISP_REG_OVL_DATAPATH_CON, OVL_BGCLR_SEL_IN);
+}
+
 static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
 	.config = mtk_ovl_config,
 	.start = mtk_ovl_start,
@@ -255,6 +270,7 @@ static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
 	.layer_on = mtk_ovl_layer_on,
 	.layer_off = mtk_ovl_layer_off,
 	.layer_config = mtk_ovl_layer_config,
+	.connect = mtk_ovl_connect,
 };
 
 static int mtk_disp_ovl_bind(struct device *dev, struct device *master,
-- 
1.8.1.1.dirty