开机logo device tree配置说明

参考配置: arch/arm64/boot/dts/rockchip/rk3399-android.dtsi

DeviceTree 解析:

reserved-memory {

    //在reserved memory划一块内存做为logo使用
    drm_logo: drm-logo@00000000 {
        compatible = "rockchip,drm-logo";

        //size填0, uboot将会根据实际logo占用buffer的大小分配
        //用户无需填写
        reg = <0x0 0x0 0x0 0x0>;
    };
};

&display_subsystem {

    //drm驱动将解析drm_logo的buffer, 用于logo显示
    memory-region = <&drm_logo>;
    route {
        //每一组route_xxx代表一路显示输出
        route_hdmi: route-hdmi {

            //在uboot loader阶段所使用的图片, 名称可根据resource.img打包的logo图片名称定义.
            //当该属性留空或者指定的图片找不到时, uboot将不显示
            logo,uboot = "logo.bmp";

            //在uboot loader阶段所使用的图片, 名称可根据resource.img打包的logo图片名称定义.
            //当该属性留空或者指定的图片找不到时, uboot将不显示
            logo,kernel = "logo_kernel.bmp";

            //支持两种显示模式: "fullscreen"全屏和"center'居中
            logo,mode = "fullscreen";

            //充电logo, 支持两种显示模式: "fullscreen"全屏和"center'居中
            charge_logo,mode = "center";

            //指定具体的显示通路, 如下, 为hdmi使用vopb输出
            connect = <&vopb_out_hdmi>;
        };
        route_mipi: route-mipi {
            logo,uboot = "logo_mipi.bmp";
            logo,kernel = "logo_kernel_mipi.bmp";
            logo,mode = "fullscreen";
            charge_logo,mode = "center";
            connect = <&vopb_out_mipi>;
        };
        route_edp: route-edp {
            logo,uboot = "logo_edp.bmp";
            logo,kernel = "logo_kernel_edp.bmp";
            logo,mode = "fullscreen";
            charge_logo,mode = "center";
            connect = <&vopb_out_edp>;
        };
    };
};