[PATCH v6 12/16] drm/mediatek: add display merge api support for MT8195

[Nancy.Lin <nancy.lin@mediatek.com>]

Add merge new API.
1. Vdosys1 merge1~merge4 support HW mute function, so add unmute API.
2. Add merge new advance config API. The original merge API is
   mtk_ddp_comp_funcs function prototype. The API interface parameters
   cannot be modified, so add a new config API for extension.
3. Add merge enable/disable API for cmdq support. The ovl_adaptor merges
   are configured with each drm plane update. Need to enable/disable
   merge with cmdq making sure all the settings taken effect in the
   same vblank.

Signed-off-by: Nancy.Lin <nancy.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_drv.h   |  6 ++
 drivers/gpu/drm/mediatek/mtk_disp_merge.c | 86 ++++++++++++++++++++---
 2 files changed, 82 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index b3a372cab0bd..2446ad0a4977 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -63,6 +63,12 @@ void mtk_merge_config(struct device *dev, unsigned int width,
 		      unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
 void mtk_merge_start(struct device *dev);
 void mtk_merge_stop(struct device *dev);
+void mtk_merge_advance_config(struct device *dev, unsigned int l_w, unsigned int r_w,
+			      unsigned int h, unsigned int vrefresh, unsigned int bpc,
+			      struct cmdq_pkt *cmdq_pkt);
+void mtk_merge_unmute(struct device *dev, struct cmdq_pkt *cmdq_pkt);
+void mtk_merge_enable(struct device *dev, struct cmdq_pkt *cmdq_pkt);
+void mtk_merge_disable(struct device *dev, struct cmdq_pkt *cmdq_pkt);
 
 void mtk_ovl_bgclr_in_on(struct device *dev);
 void mtk_ovl_bgclr_in_off(struct device *dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_merge.c b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
index b05e1df79c3d..696bb948352b 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_merge.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
@@ -17,6 +17,7 @@
 #define DISP_REG_MERGE_CTRL		0x000
 #define MERGE_EN				1
 #define DISP_REG_MERGE_CFG_0		0x010
+#define DISP_REG_MERGE_CFG_1		0x014
 #define DISP_REG_MERGE_CFG_4		0x020
 #define DISP_REG_MERGE_CFG_10		0x038
 /* no swap */
@@ -25,9 +26,12 @@
 #define DISP_REG_MERGE_CFG_12		0x040
 #define CFG_10_10_1PI_2PO_BUF_MODE		6
 #define CFG_10_10_2PI_2PO_BUF_MODE		8
+#define CFG_11_10_1PI_2PO_MERGE			18
 #define FLD_CFG_MERGE_MODE			GENMASK(4, 0)
 #define DISP_REG_MERGE_CFG_24		0x070
 #define DISP_REG_MERGE_CFG_25		0x074
+#define DISP_REG_MERGE_CFG_26		0x078
+#define DISP_REG_MERGE_CFG_27		0x07c
 #define DISP_REG_MERGE_CFG_36		0x0a0
 #define ULTRA_EN				BIT(0)
 #define PREULTRA_EN				BIT(4)
@@ -54,26 +58,52 @@
 #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;
+	bool				mute_support;
 };
 
 void mtk_merge_start(struct device *dev)
+{
+	mtk_merge_enable(dev, NULL);
+}
+
+void mtk_merge_stop(struct device *dev)
 {
 	struct mtk_disp_merge *priv = dev_get_drvdata(dev);
 
-	writel(MERGE_EN, priv->regs + DISP_REG_MERGE_CTRL);
+	mtk_merge_disable(dev, NULL);
 }
 
-void mtk_merge_stop(struct device *dev)
+void mtk_merge_enable(struct device *dev, struct cmdq_pkt *cmdq_pkt)
+{
+	struct mtk_disp_merge *priv = dev_get_drvdata(dev);
+
+	mtk_ddp_write(cmdq_pkt, 1, &priv->cmdq_reg, priv->regs,
+		      DISP_REG_MERGE_CTRL);
+}
+
+void mtk_merge_disable(struct device *dev, struct cmdq_pkt *cmdq_pkt)
 {
 	struct mtk_disp_merge *priv = dev_get_drvdata(dev);
 
-	writel(0x0, priv->regs + DISP_REG_MERGE_CTRL);
+	mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+		      DISP_REG_MERGE_CTRL);
+}
+
+void mtk_merge_unmute(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);
 }
 
 static void mtk_merge_fifo_setting(struct mtk_disp_merge *priv,
@@ -98,12 +128,19 @@ static void mtk_merge_fifo_setting(struct mtk_disp_merge *priv,
 void mtk_merge_config(struct device *dev, unsigned int w,
 		      unsigned int h, unsigned int vrefresh,
 		      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
+{
+	mtk_merge_advance_config(dev, w, 0, h, vrefresh, bpc, cmdq_pkt);
+}
+
+void mtk_merge_advance_config(struct device *dev, unsigned int l_w, unsigned int r_w,
+			      unsigned int h, unsigned int vrefresh, unsigned int bpc,
+			      struct cmdq_pkt *cmdq_pkt)
 {
 	struct mtk_disp_merge *priv = dev_get_drvdata(dev);
 	unsigned int mode = CFG_10_10_1PI_2PO_BUF_MODE;
 
-	if (!h || !w) {
-		dev_err(dev, "%s: input width(%d) or height(%d) is invalid\n", __func__, w, h);
+	if (!h || !l_w) {
+		dev_err(dev, "%s: input width(%d) or height(%d) is invalid\n", __func__, l_w, h);
 		return;
 	}
 
@@ -112,14 +149,41 @@ void mtk_merge_config(struct device *dev, unsigned int w,
 		mode = CFG_10_10_2PI_2PO_BUF_MODE;
 	}
 
-	mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+	if (r_w)
+		mode = CFG_11_10_1PI_2PO_MERGE;
+
+	mtk_ddp_write(cmdq_pkt, h << 16 | l_w, &priv->cmdq_reg, priv->regs,
 		      DISP_REG_MERGE_CFG_0);
-	mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+	mtk_ddp_write(cmdq_pkt, h << 16 | r_w, &priv->cmdq_reg, priv->regs,
+		      DISP_REG_MERGE_CFG_1);
+	mtk_ddp_write(cmdq_pkt, h << 16 | (l_w + r_w), &priv->cmdq_reg, priv->regs,
 		      DISP_REG_MERGE_CFG_4);
-	mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
+	/*
+	 * DISP_REG_MERGE_CFG_24 is merge SRAM0 w/h
+	 * DISP_REG_MERGE_CFG_25 is merge SRAM1 w/h.
+	 * If r_w > 0, the merge is in merge mode (input0 and input1 merge together),
+	 * the input0 goes to SRAM0, and input1 goes to SRAM1.
+	 * If r_w = 0, the merge is in buffer mode, the input goes through SRAM0 and
+	 * then to SRAM1. Both SRAM0 and SRAM1 are set to the same size.
+	 */
+	mtk_ddp_write(cmdq_pkt, h << 16 | l_w, &priv->cmdq_reg, priv->regs,
 		      DISP_REG_MERGE_CFG_24);
-	mtk_ddp_write(cmdq_pkt, h << 16 | w, &priv->cmdq_reg, priv->regs,
-		      DISP_REG_MERGE_CFG_25);
+	if (r_w)
+		mtk_ddp_write(cmdq_pkt, h << 16 | r_w, &priv->cmdq_reg, priv->regs,
+			      DISP_REG_MERGE_CFG_25);
+	else
+		mtk_ddp_write(cmdq_pkt, h << 16 | l_w, &priv->cmdq_reg, priv->regs,
+			      DISP_REG_MERGE_CFG_25);
+
+	/*
+	 * DISP_REG_MERGE_CFG_26 and DISP_REG_MERGE_CFG_27 is only used in LR merge.
+	 * Only take effect when the merge is setting to merge mode.
+	 */
+	mtk_ddp_write(cmdq_pkt, h << 16 | l_w, &priv->cmdq_reg, priv->regs,
+		      DISP_REG_MERGE_CFG_26);
+	mtk_ddp_write(cmdq_pkt, h << 16 | r_w, &priv->cmdq_reg, priv->regs,
+		      DISP_REG_MERGE_CFG_27);
+
 	mtk_ddp_write_mask(cmdq_pkt, SWAP_MODE, &priv->cmdq_reg, priv->regs,
 			   DISP_REG_MERGE_CFG_10, FLD_SWAP_MODE);
 	mtk_ddp_write_mask(cmdq_pkt, mode, &priv->cmdq_reg, priv->regs,
@@ -205,6 +269,8 @@ 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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