[PATCH 1/3] arm64: dts: imx8mm-tqma8mqml-mba8mx: Add DSI-LVDS bridge node

[Alexander Stein]

This adds the DSI-LVDS bridge including the regulator, backlight and
an unspecified panel. It is expected to set the compatible when the
display chain is enabled.

Signed-off-by: Alexander Stein <alexander.stein at ew.tq-group.com>
---
 .../dts/freescale/imx8mm-tqma8mqml-mba8mx.dts | 29 ++++++++
 .../boot/dts/freescale/imx8mm-tqma8mqml.dtsi  |  5 ++
 arch/arm64/boot/dts/freescale/mba8mx.dtsi     | 68 +++++++++++++++++++
 3 files changed, 102 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml-mba8mx.dts b/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml-mba8mx.dts
index 156d793a0c972..b2b825d990a62 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml-mba8mx.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml-mba8mx.dts
@@ -56,6 +56,19 @@ usb_dr_connector: endpoint {
 	};
 };
 
+&dsi_lvds_bridge {
+	ports {
+		port at 0 {
+			reg = <0>;
+
+			lvds_bridge_in: endpoint {
+				data-lanes = <1 2 3 4>;
+				remote-endpoint = <&mipi_dsi_out>;
+			};
+		};
+	};
+};
+
 &i2c1 {
 	expander2: gpio at 27 {
 		compatible = "nxp,pca9555";
@@ -72,6 +85,22 @@ expander2: gpio at 27 {
 	};
 };
 
+&mipi_dsi {
+	samsung,burst-clock-frequency = <891000000>;
+	samsung,esc-clock-frequency = <20000000>;
+
+	ports {
+		port at 1 {
+			reg = <1>;
+
+			mipi_dsi_out: endpoint {
+				data-lanes = <1 2 3 4>;
+				remote-endpoint = <&lvds_bridge_in>;
+			};
+		};
+	};
+};
+
 &pcie_phy {
 	clocks = <&pcie0_refclk>;
 	status = "okay";
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml.dtsi
index b4466a26d838a..8c0c6e7159247 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-tqma8mqml.dtsi
@@ -230,6 +230,11 @@ eeprom0: eeprom at 57 {
 	};
 };
 
+&mipi_dsi {
+	vddcore-supply = <&ldo4_reg>;
+	vddio-supply = <&ldo3_reg>;
+};
+
 &pcie_phy {
 	fsl,refclk-pad-mode = <IMX8_PCIE_REFCLK_PAD_INPUT>;
 	fsl,clkreq-unsupported;
diff --git a/arch/arm64/boot/dts/freescale/mba8mx.dtsi b/arch/arm64/boot/dts/freescale/mba8mx.dtsi
index 8a9fe5cdcc98a..269e604cb1574 100644
--- a/arch/arm64/boot/dts/freescale/mba8mx.dtsi
+++ b/arch/arm64/boot/dts/freescale/mba8mx.dtsi
@@ -8,6 +8,16 @@
 /* TQ-Systems GmbH MBa8Mx baseboard */
 
 / {
+	backlight_lvds0: backlight0 {
+		compatible = "pwm-backlight";
+		pwms = <&pwm3 0 5000000 0>;
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		default-brightness-level = <7>;
+		power-supply = <&reg_12v>;
+		enable-gpios = <&expander2 2 GPIO_ACTIVE_HIGH>;
+		status = "disabled";
+	};
+
 	beeper {
 		compatible = "pwm-beeper";
 		pwms = <&pwm4 0 250000 0>;
@@ -65,12 +75,45 @@ led2: led2 {
 		};
 	};
 
+	gpio_delays: gpio-delays {
+		compatible = "gpio-delay";
+		#gpio-cells = <3>;
+		gpio-controller;
+		gpios = <&expander0 6 GPIO_ACTIVE_HIGH>;
+		gpio-line-names = "LVDS_BRIDGE_EN_1V8";
+	};
+
+	panel0: panel_lvds0 {
+		/*
+		 * Display is not fixed, so compatible has to be added from
+		 * DT overlay
+		 */
+		backlight = <&backlight_lvds0>;
+		power-supply = <&reg_vcc_3v3>;
+		status = "disabled";
+
+		port {
+			panel_in_lvds0: endpoint {
+				data-lanes = <1 2 3 4>;
+				remote-endpoint = <&lvds_bridge_out>;
+			};
+		};
+	};
+
 	pcie0_refclk: pcie0-refclk {
 		compatible = "fixed-clock";
 		#clock-cells = <0>;
 		clock-frequency = <100000000>;
 	};
 
+	reg_12v: regulator-12v {
+		compatible = "regulator-fixed";
+		regulator-name = "MBA8MX_12V";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		regulator-always-on;
+	};
+
 	reg_hub_vbus: regulator-hub-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "MBA8MX_HUB_VBUS";
@@ -157,6 +200,10 @@ expander0: gpio at 23 {
 		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
+		gpio-line-names = "", "", "", "",
+				  "", "", "LVDS_BRIDGE_EN_3V3", "",
+				  "", "", "", "",
+				  "", "", "", "";
 
 		sd-mux-oe-hog {
 			gpio-hog;
@@ -227,6 +274,27 @@ &i2c3 {
 	scl-gpios = <&gpio5 18 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	sda-gpios = <&gpio5 19 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 	status = "okay";
+
+	dsi_lvds_bridge: bridge at 2d {
+		compatible = "ti,sn65dsi84";
+		reg = <0x2d>;
+		enable-gpios = <&gpio_delays 0 130000 0>;
+		vcc-supply = <&reg_sn65dsi83_1v8>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port at 2 {
+				reg = <2>;
+
+				lvds_bridge_out: endpoint {
+					remote-endpoint = <&panel_in_lvds0>;
+				};
+			};
+		};
+	};
 };
 
 &pwm3 {
-- 
2.34.1