linux-kernel - [PATCH 2/2] arm64: dts: ti: k3-j721e-sk: Enable HDMI

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Date:   Wed, 27 Apr 2022 21:22:32 +0530
From:   Rahul T R <r-ravikumar@...com>
To:     <nm@...com>
CC:     <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <tomi.valkeinen@...asonboard.com>,
        <laurent.pinchart@...asonboard.com>, <kishon@...com>,
        <r-ravikumar@...com>
Subject: [PATCH 2/2] arm64: dts: ti: k3-j721e-sk: Enable HDMI

Add node for dvi bridge and the endpoint nodes to
describe connection from
DSS => TI TFP410 DPI-to-DVI Bridge => HDMI connector.
Also add the required pinmux for HDMI hotplug and
powerdown

Signed-off-by: Rahul T R <r-ravikumar@...com>
---
 arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 80 +++++++++++++++++++++++++-
 1 file changed, 79 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
index 07b1e40fbc47..27a5911dfa8f 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
@@ -225,6 +225,59 @@
 			};
 		};
 	};
+
+	hdmi-connector {
+		compatible = "hdmi-connector";
+		label = "hdmi";
+		type = "a";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdmi_hpd_pins_default>;
+
+		ddc-i2c-bus = <&main_i2c1>;
+
+		/* HDMI_HPD */
+		hpd-gpios = <&main_gpio1 0 GPIO_ACTIVE_HIGH>;
+
+		port {
+			hdmi_connector_in: endpoint {
+				remote-endpoint = <&tfp410_out>;
+			};
+		};
+	};
+
+	dvi-bridge {
+		compatible = "ti,tfp410";
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdmi_pdn_pins_default>;
+
+		powerdown-gpios = <&main_gpio0 127 GPIO_ACTIVE_LOW>;
+		ti,deskew = <0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				tfp410_in: endpoint {
+					remote-endpoint = <&dpi_out0>;
+					pclk-sample = <1>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+
+				tfp410_out: endpoint {
+					remote-endpoint =
+						<&hdmi_connector_in>;
+				};
+			};
+		};
+	};
 };
 
 &main_pmx0 {
@@ -329,6 +382,18 @@
 		>;
 	};
 
+	hdmi_hpd_pins_default: hdmi-hpd-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x204, PIN_INPUT, 7) /* (AD5) UART1_RTSn.GPIO1_0 */
+		>;
+	};
+
+	hdmi_pdn_pins_default: hdmi-pdn-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x200, PIN_INPUT, 7) /* (AC4) UART1_CTSn.GPIO0_127 */
+		>;
+	};
+
 	/* Reset for M.2 E Key slot on PCIe0  */
 	ekey_reset_pins_default: ekey-reset-pns-pins-default {
 		pinctrl-single,pins = <
@@ -733,11 +798,24 @@
 };
 
 &dss_ports {
-	port {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@0  {
+		reg = <0>;
+
 		dpi0_out: endpoint {
 			remote-endpoint = <&dp0_in>;
 		};
 	};
+
+	port@1 {
+		reg = <1>;
+
+		dpi_out0: endpoint {
+			remote-endpoint = <&tfp410_in>;
+		};
+	};
 };
 
 &dp0_ports {
-- 
2.17.1