SD Boot (firmware + rfs +bootpartition)

#download flex-installer
wget https://www.nxp.com/lgfiles/sdk/lsdk2012/flex-installer && chmod +x flex-installer && sudo mv flex-installer /usr/bin
flex-installer -h

#download flex-builder
tar xvzf flexbuild_lsdk2012.tgz
cd flexbuild_lsdk2012/
source setup.env
flex-builder -h

#create docker container
docker run -it --name sd_boot --privileged -v $(pwd):/home/adv/flexbuild_lsdk2012:rw fbubuntu:18.04 /bin/bash

# -----below command are in docker container----------
cd /home/adv/flexbuild_lsdk2012

#source environment variable
source setup.env

# generate composite firmware for SD boot on ls1046ardb 
flex-builder -i mkfw -m ls1046ardb -b sd
ls -hl build/images/

# generate Ubuntu-base arm64 LSDK
flex-builder -i mkrfs -a arm64
ls -hl build/images/

# kernel image , dtb, distro boot script, flex_linux_<arch>.itb, small ramdiskrfs,etc.
# Flex-builder automatically builds the dependent images if the are not present.
flex-builder -i mkbootpartition -a arm64
ls -hl build/images/

#check sd device
ls /dev/sd*


#format sd
flex-installer -i pf -d /dev/sdm
sync

# install image to SD 
ls -hl
flex-installer -f firmware_ls1046ardb_uboot_sdboot.img -b bootpartition_LS_arm64_lts_5.4_202108161103.tgz -r rootfs_lsdk2012_ubuntu_main_arm64.tgz -d /dev/sdm