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

[Yongqiang Niu]

enable OVL_LAYER_SMI_ID_EN for multi-layer usecase

Signed-off-by: Yongqiang Niu <yongqiang....@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