linux-kernel - [PATCH 2/2] arm64: dts: ti: k3-j721e-common-proc-board: add DP to j7 evm

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Date:   Tue, 22 Feb 2022 22:02:30 +0530
From:   Rahul T R <r-ravikumar@...com>
To:     <nm@...com>
CC:     <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski@...onical.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <tomi.valkeinen@...asonboard.com>,
        <laurent.pinchart@...asonboard.com>
Subject: [PATCH 2/2] arm64: dts: ti: k3-j721e-common-proc-board: add DP to j7 evm

From: Tomi Valkeinen <tomi.valkeinen@...com>

Add the endpoint nodes to describe connection from
DSS => MHDP => DisplayPort connector.
Also add the required pinmux nodes for hotplug.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...com>
Signed-off-by: Rahul T R <r-ravikumar@...com>
---
 .../dts/ti/k3-j721e-common-proc-board.dts     | 66 +++++++++++++++++--
 1 file changed, 62 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
index 2d7596911b27..fe20c193f299 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
@@ -148,6 +148,28 @@
 		pinctrl-0 = <&main_mcan2_gpio_pins_default>;
 		standby-gpios = <&main_gpio0 127 GPIO_ACTIVE_HIGH>;
 	};
+
+	dp_pwr_3v3: fixedregulator-dp-prw {
+		compatible = "regulator-fixed";
+		regulator-name = "dp-pwr";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&exp4 0 0>;	/* P0 - DP0_PWR_SW_EN */
+		enable-active-high;
+	};
+
+	dp0: connector {
+		compatible = "dp-connector";
+		label = "DP0";
+		type = "full-size";
+		dp-pwr-supply = <&dp_pwr_3v3>;
+
+		port {
+			dp_connector_in: endpoint {
+				remote-endpoint = <&dp0_out>;
+			};
+		};
+	};
 };
 
 &main_pmx0 {
@@ -190,6 +212,12 @@
 		>;
 	};
 
+	dp0_pins_default: dp0-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x1c4, PIN_INPUT, 5) /* SPI0_CS1.DP0_HPD */
+		>;
+	};
+
 	main_i2c1_exp4_pins_default: main-i2c1-exp4-pins-default {
 		pinctrl-single,pins = <
 			J721E_IOPAD(0x230, PIN_INPUT, 7) /* (U2) ECAP0_IN_APWM_OUT.GPIO1_11 */
@@ -660,6 +688,40 @@
 				 <&k3_clks 152 18>;	/* PLL23_HSDIV0 */
 };
 
+&dss_ports {
+	port@0 {
+		reg = <0>;
+
+		dpi0_out: endpoint {
+			remote-endpoint = <&dp0_in>;
+		};
+	};
+};
+
+&mhdp {
+	pinctrl-names = "default";
+	pinctrl-0 = <&dp0_pins_default>;
+};
+
+&dp0_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@0 {
+		reg = <0>;
+		dp0_in: endpoint {
+			remote-endpoint = <&dpi0_out>;
+		};
+	};
+
+	port@4 {
+		reg = <4>;
+		dp0_out: endpoint {
+			remote-endpoint = <&dp_connector_in>;
+		};
+	};
+};
+
 &mcasp0 {
 	status = "disabled";
 };
@@ -845,10 +907,6 @@
 	status = "disabled";
 };
 
-&dss {
-	status = "disabled";
-};
-
 &icssg0_mdio {
 	status = "disabled";
 };
-- 
2.17.1