// SPDX-License-Identifier: GPL-2.0
/**
 * DT Overlay for Waveshare 4.3inch touchscreen panel interfaced with DSI on
 *
 * Adapted from RPi 7-inch panel overlay for BeagleY-AI
 *
 * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>

/*
 * Helper to show loaded overlays under: /proc/device-tree/chosen/overlays/
 */
&{/chosen} {
	overlays {
		k3-am67a-beagley-ai-dsi-waveshare-4.3inch-panel.kernel = __TIMESTAMP__;
	};
};

&{/} {
	mipi_switch: mipi-switch {
		oe-pin {
			default-state = "off";
		};

		sel-pin {
			default-state = "off";
		};
	};

	panel0 {
		compatible = "waveshare,4.3inch-dsi", "simple-panel";
		backlight = <&display_reg>;
		power-supply = <&display_reg>;
		
		/* Define panel dimensions - typically 480x272 for 4.3" */
		width-mm = <95>;
		height-mm = <54>;
		
		panel-timing {
			clock-frequency = <9000000>;
			hactive = <480>;
			vactive = <272>;
			
			hfront-porch = <8>;
			hback-porch = <8>;
			hsync-len = <4>;
			
			vfront-porch = <4>;
			vback-porch = <4>;
			vsync-len = <4>;
		};

		port {
			panel_in: endpoint {
				remote-endpoint = <&panel_bridge_out>;
			};
		};
	};

	bridge_reg: bridge-regulator {
		compatible = "regulator-fixed";
		regulator-name = "bridge-reg";
		gpio = <&display_reg 0 0>;
		vin-supply = <&display_reg>;
		enable-active-high;
	};
};

&dphy_tx0 {
	status = "okay";
};

&dsi0_csi1_i2c {
	#address-cells = <1>;
	#size-cells = <0>;

	display_reg: regulator@45 {
		compatible = "raspberrypi,7inch-touchscreen-panel-regulator"; 
		reg = <0x45>;
		gpio-controller;
		#gpio-cells = <2>;
	};
};

&dsi0 {
	status = "okay";
	#address-cells = <1>;
	#size-cells = <0>;

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

		port@0 {
			reg = <0>;
			dsi0_out: endpoint {
				remote-endpoint = <&panel_bridge_in>;
			};
		};

		port@1 {
			reg = <1>;
			dsi0_in: endpoint {
				remote-endpoint = <&dss1_dpi1_out>;
			};
		};
	};

	bridge@0 {
		status = "okay";
		compatible = "toshiba,tc358762";  /* Assuming same bridge chip */
		reg = <0>;
		vddc-supply = <&bridge_reg>;

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

			port@0 {
				reg = <0>;
				panel_bridge_in: endpoint {
					remote-endpoint = <&dsi0_out>;
				};
			};

			port@1 {
				reg = <1>;
				panel_bridge_out: endpoint {
					remote-endpoint = <&panel_in>;
				};
			};
		};
	};
};

&dss1_ports {
	#address-cells = <1>;
	#size-cells = <0>;

	/* DSS1-VP2: DSI Output */
	port@1 {
		reg = <1>;
		dss1_dpi1_out: endpoint {
			remote-endpoint = <&dsi0_in>;
		};
	};
};