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@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
index 4e05160265964355fa7c61c35362d4c4a8c329d4..735914f6ae446a4766f484ab888826efc99eefb1 100644 (file)
--- 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 */
@@ -258,6 +312,19 @@
        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>;