[PATCH v3, 07/15] drm/mediatek: enable OVL_LAYER_SMI_ID_EN for multi-layer usecase

[Yongqiang Niu <yongqiang.niu@mediatek.com>]

enable OVL_LAYER_SMI_ID_EN for multi-layer usecase

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index b47c238..4934bee 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -23,6 +23,7 @@
 #define DISP_REG_OVL_RST			0x0014
 #define DISP_REG_OVL_ROI_SIZE			0x0020
 #define DISP_REG_OVL_DATAPATH_CON		0x0024
+#define OVL_LAYER_SMI_ID_EN				BIT(0)
 #define OVL_BGCLR_SEL_IN				BIT(2)
 #define DISP_REG_OVL_ROI_BGCLR			0x0028
 #define DISP_REG_OVL_SRC_CON			0x002c
@@ -61,6 +62,7 @@ struct mtk_disp_ovl_data {
 	unsigned int gmc_bits;
 	unsigned int layer_nr;
 	bool fmt_rgb565_is_0;
+	bool smi_id_en;
 };
 
 /**
@@ -116,7 +118,17 @@ static void mtk_ovl_disable_vblank(struct mtk_ddp_comp *comp)
 
 static void mtk_ovl_start(struct mtk_ddp_comp *comp)
 {
+	struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
+
 	writel_relaxed(0x1, comp->regs + DISP_REG_OVL_EN);
+
+	if(ovl->data->smi_id_en) {
+		unsigned int reg;
+
+		reg = readl(comp->regs + DISP_REG_OVL_DATAPATH_CON);
+		reg = reg | OVL_LAYER_SMI_ID_EN;
+		writel_relaxed(reg, comp->regs + DISP_REG_OVL_DATAPATH_CON);
+	}
 }
 
 static void mtk_ovl_stop(struct mtk_ddp_comp *comp)
-- 
1.8.1.1.dirty