Brooklyn/arch/arm/boot/dts/overlays/vc4-kms-vga666-overlay.dts

/*
 * vc4-kms-vga666-overlay.dts
 * Configures a FenLogic or similar VGA666 DPI adapter when using the
 * vc4-kms-v3d driver.
 * If a suitable I2C level shifter is connected to GPIOs 0&1 and the VGA
 * ID1/SDA (pin 12) and ID3/SCL (pin 15) lines, then there is the option to
 * enable reading the EDID from the display.
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/pinctrl/bcm2835.h>

/ {
	compatible = "brcm,bcm2835";

	fragment@0 {
		target-path = "/";
		__overlay__ {
			vga_connector: vga_connector {
				compatible = "vga-connector";
				label = "vga";

				port {
					vga_con_in: endpoint {
						remote-endpoint = <&vga666_out>;
					};
				};
			};

			vga_dac {
				compatible = "dumb-vga-dac";

				ports {
					#address-cells = <1>;
					#size-cells = <0>;

					port@0 {
						reg = <0>;

						vga666_in: endpoint {
							remote-endpoint = <&dpi_out>;
						};
					};

					port@1 {
						reg = <1>;

						vga666_out: endpoint {
							remote-endpoint = <&vga_con_in>;
						};
					};
				};
			};

		};
	};

	fragment@1 {
		target = <&dpi>;
		__overlay__  {
			status = "okay";

			pinctrl-names = "default";
			pinctrl-0 = <&dpi_18bit_gpio2>;

			port {
				dpi_out: endpoint@0 {
					remote-endpoint = <&vga666_in>;
				};
			};
		};
	};

	fragment@2 {
		target = <&vga_connector>;
		__dormant__  {
			ddc-i2c-bus = <&i2c_vc>;
		};
	};

	fragment@3 {
		target = <&i2c0if>;
		__dormant__ {
			status = "okay";
		};
	};

	fragment@4 {
		target = <&i2c0mux>;
		__dormant__ {
			status = "okay";
		};
	};

	__overrides__ {
		ddc = <0>,"=2", <0>,"=3", <0>,"=4";
	};
};