theobroma systems RK3399-Q7, User Manual

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Now, to format the partition as ext4:
sudo / sbin / mkfs . ext4 - E lazy_itable_init = 0 / dev / sdX1
The option “
lazy_itable_init=0
” speeds up the first boot because it initializes the inode tables in advance.
The SD card is now ready to have the U-Boot bootloader and Linux deployed.
4.9.2 Deploy U-Boot
The U-Boot images
spl.img
and
u-boot.itb
are written to the SD card. Assuming the SD card is mapped to /dev/sdX:
sudo dd if = puma - u - boot / spl . img of =/ dev / sdX bs = 1 k seek = 32
sudo dd if = puma - u - boot / u - boot . itb of =/ dev / sdX bs = 1 k seek = 256
4.9.3 Deploy the Linux Kernel and the Root Filesystem
Mount the SD card partition and copy the rootfs (assuming that the rootfs is located at “
/opt/rk3399-rootfs
” and the
sd card at “
/dev/sdX1
”):
sudo mkdir - p / mnt / sdcard
sudo mount / dev / sdX1 / mnt / sdcard
sudo cp - av / opt / rk3399 - rootfs /* / mnt / sdcard
Copy kernel image, device tree and boot script into the boot directory:
sudo cp - r som - tools / boot - script / boot / {boot . scr,puma_rk3399} / mnt / sdcard / boot
sudo cp rockchip_linux / arch / arm64 / boot / dts / rockchip / rk3399 - puma . dtb / mnt / sdcard / boot / puma_rk3399
sudo cp rockchip_linux / arch / arm64 / boot / Image / mnt / sdcard / boot / puma_rk3399
Finally, unmount the SD card:
sudo umount / mnt / sdcard
The SD card is ready for booting.
4.9.4 U-Boot Customization
The boot script
/boot/boot.scr
handles the boot sequence. Unless you want to customize the sequence, no further action is
required.
RK3399-Q7 User Manual
© Theobroma Systems Design und Consulting GmbH
Release v0.2-3-g574c114
Page 29