drm/rockchip: dsi: add rk3568 support

Add the compatible and GRF definitions for the RK3568 soc.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220906174823.28561-4-macroalpha82@gmail.com

drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c

@@ -179,6 +179,23 @@
 #define RK3399_TXRX_SRC_SEL_ISP0	BIT(4)
 #define RK3399_TXRX_TURNREQUEST		GENMASK(3, 0)
 
+#define RK3568_GRF_VO_CON2		0x0368
+#define RK3568_DSI0_SKEWCALHS		(0x1f << 11)
+#define RK3568_DSI0_FORCETXSTOPMODE	(0xf << 4)
+#define RK3568_DSI0_TURNDISABLE		BIT(2)
+#define RK3568_DSI0_FORCERXMODE		BIT(0)
+
+/*
+ * Note these registers do not appear in the datasheet, they are
+ * however present in the BSP driver which is where these values
+ * come from. Name GRF_VO_CON3 is assumed.
+ */
+#define RK3568_GRF_VO_CON3		0x36c
+#define RK3568_DSI1_SKEWCALHS		(0x1f << 11)
+#define RK3568_DSI1_FORCETXSTOPMODE	(0xf << 4)
+#define RK3568_DSI1_TURNDISABLE		BIT(2)
+#define RK3568_DSI1_FORCERXMODE		BIT(0)
+
 #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
 
 enum {
@@ -735,8 +752,9 @@ static void dw_mipi_dsi_rockchip_config(struct dw_mipi_dsi_rockchip *dsi)
 static void dw_mipi_dsi_rockchip_set_lcdsel(struct dw_mipi_dsi_rockchip *dsi,
 					    int mux)
 {
-	regmap_write(dsi->grf_regmap, dsi->cdata->lcdsel_grf_reg,
-		mux ? dsi->cdata->lcdsel_lit : dsi->cdata->lcdsel_big);
+	if (dsi->cdata->lcdsel_grf_reg < 0)
+		regmap_write(dsi->grf_regmap, dsi->cdata->lcdsel_grf_reg,
+			mux ? dsi->cdata->lcdsel_lit : dsi->cdata->lcdsel_big);
 }
 
 static int
@@ -963,6 +981,8 @@ static int dw_mipi_dsi_rockchip_bind(struct device *dev,
 		DRM_DEV_ERROR(dev, "Failed to create drm encoder\n");
 		goto out_pll_clk;
 	}
+	rockchip_drm_encoder_set_crtc_endpoint_id(&dsi->encoder,
+						  dev->of_node, 0, 0);
 
 	ret = dw_mipi_dsi_bind(dsi->dmd, &dsi->encoder.encoder);
 	if (ret) {
@@ -1612,6 +1632,30 @@ static const struct rockchip_dw_dsi_chip_data rk3399_chip_data[] = {
 	{ /* sentinel */ }
 };
 
+static const struct rockchip_dw_dsi_chip_data rk3568_chip_data[] = {
+	{
+		.reg = 0xfe060000,
+		.lcdsel_grf_reg = -1,
+		.lanecfg1_grf_reg = RK3568_GRF_VO_CON2,
+		.lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI0_SKEWCALHS |
+					  RK3568_DSI0_FORCETXSTOPMODE |
+					  RK3568_DSI0_TURNDISABLE |
+					  RK3568_DSI0_FORCERXMODE),
+		.max_data_lanes = 4,
+	},
+	{
+		.reg = 0xfe070000,
+		.lcdsel_grf_reg = -1,
+		.lanecfg1_grf_reg = RK3568_GRF_VO_CON3,
+		.lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI1_SKEWCALHS |
+					  RK3568_DSI1_FORCETXSTOPMODE |
+					  RK3568_DSI1_TURNDISABLE |
+					  RK3568_DSI1_FORCERXMODE),
+		.max_data_lanes = 4,
+	},
+	{ /* sentinel */ }
+};
+
 static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
 	{
 	 .compatible = "rockchip,px30-mipi-dsi",
@@ -1622,6 +1666,9 @@ static const struct of_device_id dw_mipi_dsi_rockchip_dt_ids[] = {
 	}, {
 	 .compatible = "rockchip,rk3399-mipi-dsi",
 	 .data = &rk3399_chip_data,
+	}, {
+	 .compatible = "rockchip,rk3568-mipi-dsi",
+	 .data = &rk3568_chip_data,
 	},
 	{ /* sentinel */ }
 };