Installing u-boot.imx-nand to imx6ull NAND boot partition failed to set up for ubootenv

[nobody93]

Hi, I have u-boot and u-boot environment in MTD partitions in imx6ull NAND: 0: boot 0x00400000 0x00000000 0 1: ubootenv 0x00100000 0x00400000 0

I used the kob tool to install u-boot.imx-nand to iMX6ULL MTD partition 0 boot, but what is the mechanism to install bootargs and bootcmd which are defined in u-boot.imx-nand to ubootenv MTD partition?

I failed NAND boot because it missed the both bootcmd and bootargs in u-boot env: => print baudrate=115200 board_name=ULZ-EVK board_rev=14X14 bootdelay=3 bootsys=1 fdtcontroladdr=9ee17918 loadaddr=0x80800000 stderr=serial stdin=serial stdout=serial tee=no usb_net_cmd=usb start

Should I use fw_setenv to set bootcmd and bootargs to my ubootenv MTD partition after installing the u-boot.imx-nand to boot partition?

What I am missing here?

Many blogs advised not to use setenv or fw_setenv, but to get boot variables from the u-boot, but how?

Thank you.