linux-kernel - [PATCH v4 2/2] ARM: dts: sun6i: hummingbird-a31: Enable display output through VGA bridge

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Date:   Wed, 16 Nov 2016 23:42:32 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <maxime.ripard@...e-electrons.com>,
        David Airlie <airlied@...ux.ie>,
        Archit Taneja <architt@...eaurora.org>
Cc:     Chen-Yu Tsai <wens@...e.org>, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: [PATCH v4 2/2] ARM: dts: sun6i: hummingbird-a31: Enable display output through VGA bridge

The Hummingbird A31 board has a VGA DAC which converts RGB output
from the LCD interface to VGA analog signals.

Add nodes for the VGA DAC, its power supply, and enable this part
of the display pipeline.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 arch/arm/boot/dts/sun6i-a31-hummingbird.dts | 67 +++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)

diff --git a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
index 62287bd2aeb5..b168d6df2b30 100644
--- a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
+++ b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
@@ -63,6 +63,60 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	vga-connector {
+		compatible = "vga-connector";
+
+		port {
+			vga_con_in: endpoint {
+				remote-endpoint = <&vga_dac_out>;
+			};
+		};
+	};
+
+	vga-dac {
+		compatible = "dumb-vga-dac";
+		vdd-supply = <&reg_vga_3v3>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <0>;
+
+				vga_dac_in: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&tcon0_out_vga>;
+				};
+			};
+
+			port@1 {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <1>;
+
+				vga_dac_out: endpoint@0 {
+					reg = <0>;
+					remote-endpoint = <&vga_con_in>;
+				};
+			};
+		};
+	};
+
+	reg_vga_3v3: vga_3v3_regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vga-3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		enable-active-high;
+		gpio = <&pio 7 25 GPIO_ACTIVE_HIGH>; /* PH25 */
+	};
+
 	wifi_pwrseq: wifi_pwrseq {
 		compatible = "mmc-pwrseq-simple";
 		reset-gpios = <&pio 6 10 GPIO_ACTIVE_LOW>; /* PG10 */
@@ -253,6 +307,19 @@
 	status = "okay";
 };
 
+&tcon0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&lcd0_rgb888_pins>;
+	status = "okay";
+};
+
+&tcon0_out {
+	tcon0_out_vga: endpoint@0 {
+		reg = <0>;
+		remote-endpoint = <&vga_dac_in>;
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins_a>;
-- 
2.10.2