RK3568-B2-ANDROID11-VGA

原理图

经原理图可知由芯片将EDP转成VGA-out

第一步：万用表测量和设置电源位使芯片供电正常

第二步：添加DTS-EDP部分（将HDMI关闭）

路径： \kernel\arch\arm64\boot\dts\rockchip\rk3568-evb.dtsi

	edp_panel: edp-panel {compatible = "simple-panel";status = "okay";  //disabled or okay
//	power-supply = <&vcc3v3_lcd_edp>;enable-gpios = <&gpio0 RK_PC4 GPIO_ACTIVE_HIGH>;prepare-delay-ms = <201>;enable-delay-ms = <201>;backlight = <&backlight>;display-timings {native-mode = <&timing0>;timing0: timing0 {clock-frequency = <140000000>;hactive = <1920>;vactive = <1080>;hfront-porch = <80>;hsync-len = <20>;hback-porch = <80>;vfront-porch = <12>;vsync-len = <24>;vback-porch = <12>;hsync-active = <0>;vsync-active = <0>;de-active = <0>;pixelclk-active = <0>;};};ports {panel_in_edp: endpoint {remote-endpoint = <&edp_out_panel>;};};};
};

&edp {status = "okay"; //disabled or okayhpd-gpios = <&gpio0 RK_PC0 GPIO_ACTIVE_HIGH>;force-hpd;ports {edp_out: port@1 {reg = <1>;#address-cells = <1>;#size-cells = <0>;edp_out_panel: endpoint@0 {reg = <0>;remote-endpoint = <&panel_in_edp>;};};};
};&route_edp {status = "okay"; //disabled or okayconnect = <&vp0_out_edp>;
};
&edp_phy {status = "okay"; //disabled or okay
};
&edp_in_vp0 {status = "disabled"; //disabled or okay
};&edp_in_vp1 {status = "disabled";
};

    //这里并未用到vcc3v3_lcd_edp: vcc3v3-lcd-edp {compatible = "regulator-fixed";gpio = <&gpio1 RK_PB1 GPIO_ACTIVE_HIGH>;enable-active-high;regulator-name = "vcc3v3_lcd_edp";regulator-boot-on;regulator-state-mem {regulator-off-in-suspend;};};