1RK_YOCTO_CFG="rockchip-rk3568-evb" 2RK_WIFIBT_TTY="ttyS8" 3RK_KERNEL_DTS_NAME="rk3568-evb1-ddr4-v10-linux" 4RK_PARAMETER="parameter-buildroot-fit.txt" 5RK_USE_FIT_IMG=y 6