Compile Android8.1

Download Android SDK

Due to the larger SDK, you can choose the cloud disk to download
Firefly-RK3399_Android8.1_xxx.7za from the download page (you can
directly use the Firefly-RK3399 source package):

Android8.1 SDK Source

After the download is complete, verify the MD5 code before
decompression:

   $md5sum ~/firefly_rk3399_android8.1_git_20211217.7z.001
   $md5sum ~/firefly_rk3399_android8.1_git_20211217.7z.002
   $md5sum ~/firefly_rk3399_android8.1_git_20211217.7z.003

   48b4cfcb538cdc39ea53349989691617  firefly_rk3399_android8.1_git_20211217.7z.001
   05776d4966d92efdcb88170355d8fbd4  firefly_rk3399_android8.1_git_20211217.7z.002
   c83f54d89b4cde6eb620b92cd2e99a05  firefly_rk3399_android8.1_git_20211217.7z.003

Then unzip:

   mkdir -p ~/proj/roc-rk3399-pc
   cd ~/proj/roc-rk3399-pc
   7z x ~/firefly_rk3399_android8.1_git_20211217.7z.001 -r -o.
   git reset --hard

Update the remote warehouse:

   git remote rm origin
   git remote add gitlab git@gitlab.com:TeeFirefly/firenow-oreo-rk3399.git

Synchronize the source code from gitlab:

   git pull gitlab firefly-rk3399:firefly-rk3399

You can also view the source code online at the following address:

[https://gitlab.com/TeeFirefly/firenow-oreo-rk3399#]

Firefly-RK3399 product compilation method

HDMI + DP display compilation

Compile HDMI + DP by default

   ./FFTools/make.sh -j8
   ./FFTools/mkupdate/mkupdate.sh

EDP7.85 compilation

   ./FFTools/make.sh -j8 -d rk3399-firefly-edp -l rk3399_firefly_edp_mid-userdebug
   ./FFTools/mkupdate/mkupdate.sh -l rk3399_firefly_edp_mid-userdebug

MIPI7.85 compilation

   ./FFTools/make.sh -j8 -d rk3399-firefly-mipi -l rk3399_firefly_mipi_mid-userdebug
   ./FFTools/mkupdate/mkupdate.sh -l rk3399_firefly_mipi_mid-userdebug

Compile manually Firefly-RK3399 Android 8.1

Before compiling, execute the following command to configure
environment variables:

   export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
   export PATH=$JAVA_HOME/bin:$PATH
   export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar

Compile kernel：

   cd ~/proj/Firefly-RK3399/kernel/
   make ARCH=arm64 firefly_defconfig
   make -j8 ARCH=arm64 rk3399-firefly.img

Compile uboot：

   cd ~/proj/Firefly-RK3399/u-boot/
   make rk3399_defconfig
   make ARCHV=aarch64 -j8

Compile Android：

   cd ~/proj/Firefly-RK3399/
   source build/envsetup.sh
   lunch rk3399_firefly_mid-userdebug
   make -j8
   ./mkimage.sh

Use Firefly official script to compile

Compile the kernel separately：

   cd ~/proj/Firefly-RK3399/
   ./FFTools/make.sh -k -j8

Compile the uboot separately：

   cd ~/proj/Firefly-RK3399/
   ./FFTools/make.sh -u -j8

Compile Android upper layer separately：

   cd ~/proj/Firefly-RK3399/
   ./FFTools/make.sh -a -j8

Compile ubooot, kernel, Android at the same time：

   cd ~/proj/Firefly-RK3399/
   ./FFTools/make.sh -j8

Packaged into unified firmware

After compiling, you can use Firefly's official script to package into
unified firmware, execute the following command：

   ./FFTools/mkupdate/mkupdate.sh -l rk3399_firefly_mid-userdebug

According to different -l XXX-userdebug parameters, the packaged
unified firmware will be stored in different directories (rockdev
/image-XXX/): product name XXX_XXX_date XXX.img

It is also very simple to package the unified firmware "update.img"
under Windows, copy the compiled files to the  "rockdev/Image"
directory of AndroidTool, and then run the "mkupdate.bat" batch file
under the "rockdev" directory Create "update.img" and store it in the
"rockdev/Image" directory.

Partition mirror

boot.img：The Android initramfs image contains the basic file system
of the Android root directory, which is responsible for initializing
and loading the system partition.

system.img： Android file system partition image in ext4 file system
format.

kernel.img： Kernel image.

resource.img： Resource image, including boot pictures and kernel
device tree.

misc.img： The misc partition image is responsible for switching the
startup mode and passing the parameters of the emergency mode.

recovery.img： Recovery mode image.

rk3399_loader_v1.12.112.bin：Loader file.

uboot.img： U-Boot image file.

trust.img： Arm trusted file (ATF) image file.

parameter.txt： Partition layout and kernel command line.

vendor.img： TODO

oem.img： TODO

baseparameter.img： TODO

Other Android versions

<font color=#ff0000 size=3>Main maintenance:</font>  "Compile
Android7.1 Industry firmware"

Support but not maintain:  "Compile Android7.1 firmware"  "Compile
Android8.1"