The Rockchip Linux SDK support Buildroot, Debian and Yocto. We will introduce how to build Edge2 firmware using the Rockchip Linux SDK here. For readability, the subsequent Rockchip Linux SDK will be referred to as SDK.

Install essential dependencies. It is recommended to use Ubuntu 22.04 for compilation, or you can choose to Build in Docker.

$ sudo apt update && sudo apt install -y git ssh make gcc libssl-dev \
liblz4-tool expect expect-dev g++ patchelf chrpath gawk texinfo chrpath \
diffstat binfmt-support qemu-user-static live-build bison flex fakeroot \
cmake gcc-multilib g++-multilib unzip device-tree-compiler ncurses-dev \
libgucharmap-2-90-dev bzip2 expat gpgv2 cpp-aarch64-linux-gnu libgmp-dev \
libmpc-dev bc python-is-python3 python2 libstdc++-12-dev xz-utils repo git-lfs

1. Download the base SDK packages here: khadas_edges_yocto_sdk_base.tar.gz0x

2. Create and enter the working directory:

$ mkdir -p ~/project/edge2-linux-sdk && cd ~/project/edge2-linux-sdk

3. Decompress base SDK:

$ cat path/to/sdk-base-packages/khadas_edges_yocto_sdk_base.tar.gz* | tar -zxv -C ~/project/edge2-linux-sdk

4. Then you can see .repo derctory in ~/project/edge2-linux-sdk directory by using ls -la command.

$ ls -al ~/project/edge2-linux-sdk

5. Sync and update code:

$ .repo/repo/repo sync -l 
$ .repo/repo/repo sync -c

6. Create a work branch for each repository:

$ .repo/repo/repo start khadas --all

In the future， you can use the following command to update the SDK code:

$ cd ~/project/
$ .repo/repo/repo sync -c 

The SDK project directory includes buildroot, debian, app, kernel, u-boot, device, docs, external, etc.

Repositories are managed by manifests, and the repo tool is utilized to manage each directory or its corresponding Git project, including the following subdirectories:

• app : Contains upper-level application apps, mainly various application demos.
• buildroot : Contains the root file system developed with Buildroot.
• debian : Contains the root file system developed with Debian.
• device/rockchip : Contains chip board-level configurations and scripts/files for compiling and packaging firmware.
• docs : Contains general development guides, Linux system development guides, chip platform-related documents, etc.
• external : Contains third-party related repositories, including display, audio/video, camera, network, security, etc.
• kernel : Contains Kernel development code.
• output : Contains firmware information, compilation details, XML files, host environment, etc., generated during each build.
• prebuilts : Contains cross-compilation toolchains.
• rkbin : Contains Rockchip-related binaries and tools.
• rockdev : Contains compiled output firmware, actually, it soft link to xxx output/firmware .
• tools : Contains commonly used tools for both Linux and Windows operating systems.
• u-boot : Contains U-Boot code developed based on version v2017.09.
• yocto : Contains the root file system developed with Yocto.

The SDK can be easily compiled using the build.sh script.

You should setup the compile configuration before compilation.

$ cd <SDK>
$ ./build.sh lunch

Just input the number of khadas_rk3588s_edge2_xxx_defconfig is ok. xxx can be buildroot, debian, yocto.

There are three configuration files for Edge2 in <SDK>/device/rockchip/rk3588/

$ ls <SDK>/device/rockchip/rk3588/khadas_rk3588s_edge2_*
khadas_rk3588s_edge2_buildroot_defconfig	# for Buildroot
khadas_rk3588s_edge2_debian_defconfig		# for Debian
khadas_rk3588s_edge2_yocto_defconfig		# for Yocto

The khadas_rk3588s_edge2_xxx_defconfig content is as follow:

After setting up the compile configuration, just run ./build.sh to start building.

Then you can get the image in <SDK>/output/ directory.

sudo dpkg -i <SDK>/debian/ubuntu-build-service/packages/*
sudo apt-get install -f

$ ./build.sh uboot

$ ./build.sh kernel

$ ./build.sh rootfs

You can get help messages by executing ./build.sh help:

Usage: build.sh [OPTIONS]
Available options:
chip[:<chip>[:<config>]]          	choose chip
defconfig[:<config>]              	choose defconfig
 *_defconfig                      	switch to specified defconfig
    available defconfigs:
	khadas_rk3588s_edge2_buildroot_defconfig
	khadas_rk3588s_edge2_debian_defconfig
	khadas_rk3588s_edge2_yocto_defconfig
	rockchip_defconfig
	rockchip_rk3588_evb1_lp4_v10_defconfig
	rockchip_rk3588_evb7_v11_defconfig
	rockchip_rk3588s_evb1_lp4x_v10_defconfig
 olddefconfig                     	resolve any unresolved symbols in .config
 savedefconfig                    	save current config to defconfig
 menuconfig                       	interactive curses-based configurator
config                            	modify SDK defconfig
print-parts                        	print partitions
list-parts                         	alias of print-parts
mod-parts                          	interactive partition table modify
edit-parts                         	edit raw partitions
new-parts:<offset>:<name>:<size>...	re-create partitions
insert-part:<idx>:<name>[:<size>]  	insert partition
del-part:(<idx>|<name>)            	delete partition
move-part:(<idx>|<name>):<idx>     	move partition
rename-part:(<idx>|<name>):<name>  	rename partition
resize-part:(<idx>|<name>):<size>  	resize partition
misc                              	pack misc image
kernel[:cmds]                    	build kernel
recovery-kernel[:cmds]           	build kernel for recovery
modules[:cmds]                   	build kernel modules
linux-headers[:cmds]             	build linux-headers
kernel-config[:cmds]             	modify kernel defconfig
kconfig[:cmds]                   	alias of kernel-config
kernel-make[:<arg1>:<arg2>]      	run kernel make
kmake[:<arg1>:<arg2>]            	alias of kernel-make
wifibt[:<dst dir>[:<chip>]]       	build Wifi/BT
rtos                             	build and pack RTOS
buildroot-config[:<config>]       	modify buildroot defconfig
bconfig[:<config>]                	alias of buildroot-config
buildroot-make[:<arg1>:<arg2>]    	run buildroot make
bmake[:<arg1>:<arg2>]             	alias of buildroot-make
rootfs[:<rootfs type>]            	build default rootfs
buildroot                         	build buildroot rootfs
yocto                             	build yocto rootfs
debian                            	build debian rootfs
recovery                          	build recovery
pcba                              	build PCBA
security-createkeys               	create keys for security
security-misc                     	build misc with system encryption key
security-ramboot                  	build security ramboot
security-system                   	build security system
loader[:cmds]                    	build loader (uboot)
uboot[:cmds]                     	build u-boot
uefi[:cmds]                      	build uefi
extra-part                        	pack extra partition images
firmware                          	pack and check firmwares
edit-package-file                 	edit package-file
edit-ota-package-file             	edit package-file for OTA
updateimg                         	build update image
ota-updateimg                     	build update image for OTA
all                               	build images
release                           	release images and build info
all-release                       	build and release images
shell                             	setup a shell for developing
cleanall                          	cleanup
clean[:module[:module]]...        	cleanup modules
    available modules:
	all
	config
	extra-part
	firmware
	kernel
	loader
	misc
	pcba
	recovery
	rootfs
	rtos
	security
	updateimg
post-rootfs <rootfs dir>          	trigger post-rootfs hook scripts
help                              	usage
 
Default option is 'all'.

You can also choose to build the OS image in a Docker container.

Please refer to Docker Documentation.

$ sudo usermod -aG docker $USER

$ docker run hello-world

If you see the following print-out, Docker has installed successfully:

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete
Digest: sha256:be0cd392e45be79ffeffa6b05338b98ebb16c87b255f48e297ec7f98e123905c
Status: Downloaded newer image for hello-world:latest
 
Hello from Docker!
This message shows that your installation appears to be working correctly.
 
To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.
 
To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash
 
Share images, automate workflows, and more with a free Docker ID:
 https://cloud.docker.com/
 
For more examples and ideas, visit:
 https://docs.docker.com/engine/userguide/

Get Docker image:

$ cd ~/project/
$ docker pull wesion/yocto-rockchip

Enter Docker:

$ docker run --rm -it  --privileged --device=/dev/loop-control:/dev/loop-control \
             --device=/dev/loop0:/dev/loop0 --cap-add SYS_ADMIN -v /opt:/opt \
             -v $(pwd):/home/khadas/yocto wesion/yocto-rockchip bash

Start your build from inside the Docker container.

khadas@59f19b6a36e2:~/yocto$ ./build.sh lunch
khadas@59f19b6a36e2:~/yocto$ ./build.sh

1. Copy upgrade tool to your local path

$ sudo cp <SDK>/tools/linux/Linux_Upgrade_Tool/Linux_Upgrade_Tool/upgrade_tool /usr/local/bin/

2. Put your Edge2 into upgrade mode. Ref: Boot into upgrade mode

$ upgrade_tool uf <SDK>/output/edge2-${rootfs}-${date}.img

$ sudo upgrade_tool di -uboot <SDK>/output/update/Image/uboot.img

$ sudo upgrade_tool di -boot <SDK>/output/update/Image/boot.img

$ sudo upgrade_tool di -rootfs <SDK>/output/update/Image/rootfs.img

Please refer to Edge2 MIPI Camera Usage