linux-kernel - [PATCH 5/6] ARM: dts: imx6qdl-apalis: add VGA support

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Message-Id: <20180905052113.21262-5-stefan@agner.ch>
Date:   Tue,  4 Sep 2018 22:21:12 -0700
From:   Stefan Agner <stefan@...er.ch>
To:     linus.walleij@...aro.org, airlied@...ux.ie, robh+dt@...nel.org,
        mark.rutland@....com, shawnguo@...nel.org, s.hauer@...gutronix.de,
        p.zabel@...gutronix.de
Cc:     kernel@...gutronix.de, fabio.estevam@....com, linux-imx@....com,
        architt@...eaurora.org, a.hajda@...sung.com,
        Laurent.pinchart@...asonboard.com, gustavo@...ovan.org,
        maarten.lankhorst@...ux.intel.com, sean@...rly.run,
        marcel.ziswiler@...adex.com, max.krummenacher@...adex.com,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Stefan Agner <stefan@...er.ch>
Subject: [PATCH 5/6] ARM: dts: imx6qdl-apalis: add VGA support

The Apalis iMX6 modules use a simple DAC using resistor ladders
to convert parallel RGB to VGA. Add support for this output using
the dump VGA driver.

Signed-off-by: Stefan Agner <stefan@...er.ch>
---
 arch/arm/boot/dts/imx6q-apalis-eval.dts | 28 +++++++++++++
 arch/arm/boot/dts/imx6qdl-apalis.dtsi   | 52 +++++++++++++++++++++++++
 2 files changed, 80 insertions(+)

diff --git a/arch/arm/boot/dts/imx6q-apalis-eval.dts b/arch/arm/boot/dts/imx6q-apalis-eval.dts
index 707ac9a46115..ae07b3a105ef 100644
--- a/arch/arm/boot/dts/imx6q-apalis-eval.dts
+++ b/arch/arm/boot/dts/imx6q-apalis-eval.dts
@@ -140,6 +140,16 @@
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;
 	};
+
+	vga {
+		compatible = "vga-connector";
+
+		port {
+			vga_con_in: endpoint {
+				remote-endpoint = <&vga_bridge_out>;
+			};
+		};
+	};
 };
 
 &backlight {
@@ -281,6 +291,24 @@
 	status = "okay";
 };
 
+&vgabridge {
+	status = "okay";
+
+	ports {
+		port@1 {
+			reg = <1>;
+
+			vga_bridge_out: endpoint {
+				remote-endpoint = <&vga_con_in>;
+			};
+		};
+	};
+};
+
+&vgadisplay {
+	status = "okay";
+};
+
 &iomuxc {
 	/*
 	 * Mux the Apalis GPIOs
diff --git a/arch/arm/boot/dts/imx6qdl-apalis.dtsi b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
index 05f07ea3e8c8..e8d0407e3e18 100644
--- a/arch/arm/boot/dts/imx6qdl-apalis.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-apalis.dtsi
@@ -138,6 +138,54 @@
 		spdif-out;
 		status = "disabled";
 	};
+
+	vgabridge: bridge {
+		compatible = "dumb-vga-dac";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		de-active = <0>;
+		status = "disabled";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				vga_bridge_in: endpoint {
+					remote-endpoint = <&vga_display_out>;
+				};
+			};
+		};
+	};
+
+	vgadisplay: display@di0 {
+		compatible = "fsl,imx-parallel-display";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		interface-pix-fmt = "rgb565";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_ipu2_vdac>;
+		status = "disabled";
+
+		port@0 {
+			reg = <0>;
+
+			vga_display_in: endpoint {
+				remote-endpoint = <&ipu2_di0_disp0>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+
+			vga_display_out: endpoint {
+				remote-endpoint = <&vga_bridge_in>;
+			};
+		};
+	};
+
 };
 
 &audmux {
@@ -373,6 +421,10 @@
 	status = "disabled";
 };
 
+&ipu2_di0_disp0 {
+	remote-endpoint = <&vga_display_in>;
+};
+
 &pwm1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_pwm1>;
-- 
2.18.0