Add merge mute/unmute setting for MT8195.
MT8195 Vdosys1 merge1~merge4 support HW mute function.

Signed-off-by: Nancy.Lin <nancy....@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_merge.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_merge.c 
b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
index 92c81ce24a49..dff2797a2f68 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_merge.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
@@ -58,12 +58,15 @@
 #define FLD_PREULTRA_TH_LOW                    GENMASK(15, 0)
 #define FLD_PREULTRA_TH_HIGH                   GENMASK(31, 16)
 
+#define DISP_REG_MERGE_MUTE_0          0xf00
+
 struct mtk_disp_merge {
-       void __iomem *regs;
-       struct clk *clk;
-       struct clk *async_clk;
-       struct cmdq_client_reg          cmdq_reg;
-       bool                            fifo_en;
+       void __iomem            *regs;
+       struct clk              *clk;
+       struct clk              *async_clk;
+       struct cmdq_client_reg  cmdq_reg;
+       bool                    fifo_en;
+       bool                    mute_support;
 };
 
 void mtk_merge_start(struct device *dev)
@@ -82,6 +85,10 @@ void mtk_merge_start_cmdq(struct device *dev, struct 
cmdq_pkt *cmdq_pkt)
 {
        struct mtk_disp_merge *priv = dev_get_drvdata(dev);
 
+       if (priv->mute_support)
+               mtk_ddp_write(cmdq_pkt, 0x0, &priv->cmdq_reg, priv->regs,
+                             DISP_REG_MERGE_MUTE_0);
+
        mtk_ddp_write(cmdq_pkt, 1, &priv->cmdq_reg, priv->regs,
                      DISP_REG_MERGE_CTRL);
 }
@@ -90,6 +97,10 @@ void mtk_merge_stop_cmdq(struct device *dev, struct cmdq_pkt 
*cmdq_pkt)
 {
        struct mtk_disp_merge *priv = dev_get_drvdata(dev);
 
+       if (priv->mute_support)
+               mtk_ddp_write(cmdq_pkt, 0x1, &priv->cmdq_reg, priv->regs,
+                             DISP_REG_MERGE_MUTE_0);
+
        mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
                      DISP_REG_MERGE_CTRL);
 }
@@ -264,6 +275,8 @@ static int mtk_disp_merge_probe(struct platform_device 
*pdev)
        priv->fifo_en = of_property_read_bool(dev->of_node,
                                              "mediatek,merge-fifo-en");
 
+       priv->mute_support = of_property_read_bool(dev->of_node,
+                                                  "mediatek,merge-mute");
        platform_set_drvdata(pdev, priv);
 
        ret = component_add(dev, &mtk_disp_merge_component_ops);
-- 
2.18.0

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