问题描述及复现步骤:

修改vi device/rockchip/.BoardConfig.mk
改成
#!/bin/bash
CMD=realpath $BASH_SOURCE
CUR_DIR=dirname $CMD
source $CUR_DIR/firefly-rk3568-buildroot.mk

Kernel dts

#export RK_KERNEL_DTS=rk3568-firefly-aioj
export RK_KERNEL_DTS=rk3568-firefly-aioj-edp-M156X40

PRODUCT MODEL

export RK_PRODUCT_MODEL=AIO_3568J
重新编译build.sh，编译后有rk3568-firefly-aioj-edp-M156X40.dtb
烧写入板子，EDP无输出，/dev/目录下也没有FB的设备节点，DTS只修改了屏幕Timing，其他没有修改，DTS修改如下：
display-timings {
native-mode = <&timing0>;

timing0: timing0 {
                    clock-frequency = <138780000>;
                    hactive = <1920>;
                    vactive = <1080>;
                    hfront-porch = <100>;
                    hsync-len = <20>;
                    hback-porch = <210>;
                    vfront-porch = <12>;
                    vsync-len = <3>;
                    vback-porch = <36>;
                    hsync-active = <0>;
                    vsync-active = <0>;
                    de-active = <0>;
                    pixelclk-active = <0>;
            };
    };