[问答]

请教一下RK3568是如何将EDP转成VGA-out的

问答对人有帮助，内容完整，我也想知道答案 0 请教一下RK3568是如何将EDP转成VGA-out的？ 0
2022-3-2 06:29:12　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × liutiefu 该类别下有 26 个回答。邀请回答 tigerwang711 该类别下有 20 个回答。邀请回答 ze55me 该类别下有 20 个回答。邀请回答 zhuzb0754 该类别下有 19 个回答。邀请回答杀狼000 该类别下有 19 个回答。邀请回答冰箱洗衣机该类别下有 18 个回答。邀请回答 YYXIAO 该类别下有 18 个回答。邀请回答 CDCNKA 该类别下有 17 个回答。邀请回答 jjll652 该类别下有 17 个回答。邀请回答河神大人该类别下有 17 个回答。邀请回答 mede1001 该类别下有 17 个回答。邀请回答安德森大该类别下有 17 个回答。邀请回答 YOYOOO 该类别下有 16 个回答。邀请回答麻酱该类别下有 16 个回答。邀请回答世态薄凉该类别下有 16 个回答。邀请回答熊本熊该类别下有 16 个回答。邀请回答 wang21cj 该类别下有 15 个回答。邀请回答 dfgsdf 该类别下有 15 个回答。邀请回答 szj0213 该类别下有 15 个回答。邀请回答梅利号该类别下有 15 个回答。邀请回答举报王银喜相关推荐 • RK3568J edp屏幕点亮时序调试过程是怎样的？ 1900 • 请教一下RK3568开发板的启动流程是怎样的呢 1872 • 如何将rk3568_loader.bin烧写到eMMC中呢 3280 • RK3568J 配置EDP没有设备接点屏幕也无输出是何原因 2487 • RK3568包含的功能有哪些 1389 • 请问一下RK3568有多少个脚，RK3566也是一样吗？ 6335 • 求大神解答RK3568M和rk3568是pin to pin兼容的吗 2927 • 瑞芯微RK3568芯片具有哪些功能应用？ 2065 • 瑞芯微RK3568怎么样？ 2217 • 请问如何将RTL8723DU移植到RK3568并编译到内核中？ 1374 1个回答

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： kernelarcharm64bootdtsrockchiprk3568-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 okay
hpd-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 okay
      connect = <&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;
      };
      };

[tr]NAMEGPIOGPIO_ACTIVE[/tr]