[PATCH v3 2/2] ARM: dts: sun6i: hummingbird-a31: Enable display output through VGA bridge

[Chen-Yu Tsai]

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 at csie.org>
---
 arch/arm/boot/dts/sun6i-a31-hummingbird.dts | 76 +++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts 
b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
index 9a74637f677f..1ab28b2108fe 100644
--- a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
+++ b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts
@@ -63,6 +63,62 @@
                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 at 0 {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+                               reg = <0>;
+
+                               vga_dac_in: endpoint at 0 {
+                                       reg = <0>;
+                                       remote-endpoint = <&tcon0_out_vga>;
+                               };
+                       };
+
+                       port at 1 {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+                               reg = <1>;
+
+                               vga_dac_out: endpoint at 0 {
+                                       reg = <0>;
+                                       remote-endpoint = <&vga_con_in>;
+                               };
+                       };
+               };
+       };
+
+       reg_vga_3v3: vga_3v3_regulator {
+               compatible = "regulator-fixed";
+               pinctrl-names = "default";
+               pinctrl-0 = <&vga_3v3_enable_pin_hummingbird>;
+               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 */
@@ -166,6 +222,13 @@
                allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
        };

+       vga_3v3_enable_pin_hummingbird: vga_3v3_enable_pin {
+               allwinner,pins = "PH25";
+               allwinner,function = "gpio_out";
+               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+               allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+       };
+
        wifi_reset_pin_hummingbird: wifi_reset_pin at 0 {
                allwinner,pins = "PG10";
                allwinner,function = "gpio_out";
@@ -245,6 +308,19 @@
        status = "okay";
 };

+&tcon0 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&lcd0_rgb888_pins>;
+       status = "okay";
+};
+
+&tcon0_out {
+       tcon0_out_vga: endpoint at 0 {
+               reg = <0>;
+               remote-endpoint = <&vga_dac_in>;
+       };
+};
+
 &uart0 {
        pinctrl-names = "default";
        pinctrl-0 = <&uart0_pins_a>;
-- 
2.9.3