Difference between revisions of "Rock5/guide/build-kernel-on-5b"

Revision as of 02:53, 26 October 2022

    ROCK 5 >  Guide >  Build Kernel on ROCK 5B

Build Kernel on ROCK 5B

Rockchip Debian SDK

Below is the instructions of how to build kernel for ROCK 5 on rock5 board.

Available boards:

• ROCK 5B

Get the source code

You need Git to get multiple git repositories to build the image.

Install Git if you don't have it.

sudo apt-get update
sudo apt-get install git

Clone the source code

mkdir ~/rk3588-sdk && cd ~/rk3588-sdk
git clone -b stable-5.10-rock5 https://github.com/radxa/kernel.git
git clone -b master https://github.com/radxa/rkbin.git
git clone -b debian https://github.com/radxa/build.git

And you will get

build  kernel  rkbin  

Directories usage introductions:

• build:
  • Some script files and configuration files for building u-boot, kernel and rootfs.
• kernel:
  • kernel source code.
• rkbin:
  • Prebuilt Rockchip binaries, include first stage loader and ATF(Arm Trustzone Firmware).

Install other build tools

sudo apt-get install device-tree-compiler libncurses5 libncurses5-dev build-essential libssl-dev mtools bc python dosfstools bison flex rsync

Build kernel

Need to checkout branch to stable-5.10-rock5.

Build kernel with default rockchip_linux_defconfig.

cd ~/rk3588-sdk
./build/mk-kernel.sh rk3588-rock-5b    #For ROCK 5B

Change kernel config

Optionally, if you want to change the default kernel config

cd ~/rk3588-sdk
cd kernel
make rockchip_linux_defconfig
make menuconfig
make savedefconfig
cp defconfig arch/arm64/configs/rockchip_linux_defconfig
cd ..
./build/mk-kernel.sh rk3588-rock-5b    #For ROCK 5B

You will get the kernel image and dtb file

ls out/kernel/
Image  rk3588-rock-5b.dtb

Build kernel deb package

Because the cross compiler is not used, this line needs to be deleted out in the file kernel-package.mk.

...
KERNEL_MAKE ?= make \
ARCH=arm64 \
CROSS_COMPILE="path/aarch64-linux-gnu-"
...

change to:

...
KERNEL_MAKE ?= make \
ARCH=arm64 \
...

The kernel package build can pack the kernel, device tree, modules and firmware into Debian packages, which makes it easier to install on the ROCK 5.

./build/pack-kernel.sh -d rockchip_linux_defconfig -r 10 # rockchip_linux_defconfig: kernel defconfig; 1: release number

The generated packages will be copied to out/packages directory.

ls out/packages/
linux-5.10.66-10-rockchip-ge5013df5e066_5.10.66-10-rockchip_arm64.changes
linux-image-5.10.66-10-rockchip-ge5013df5e066-dbg_5.10.66-10-rockchip_arm64.deb
linux-headers-5.10.66-10-rockchip-ge5013df5e066_5.10.66-10-rockchip_arm64.deb
linux-libc-dev_5.10.66-10-rockchip_arm64.deb
linux-image-5.10.66-10-rockchip-ge5013df5e066_5.10.66-10-rockchip_arm64.deb

When you want to install specified kernel packages to your OS, try the following steps.

# dpkg -i linux-image-5.10.66-10-rockchip-ge5013df5e066-dbg_5.10.66-10-rockchip_arm64.deb

After a while, you will find that some files are generated in the /boot directory.then you may modify the default boot kernel.

$ vim /boot/extlinux/extlinux.conf
...
default l0
menu title U-Boot menu
prompt 0
timeout 10
...

change to:

...
default l1
menu title U-Boot menu
prompt 0
timeout 10
...

Now,you can reboot your board.After entering the system, enter the following command to check whether the version is the same as the version you built

$ uname -r

Flash the image

FAQs

Troubleshooting

Check ROCK 5 FAQs first, if it doesn't help, start a new post on the forum https://forum.radxa.com/c/rock5.