Build AOSP code

The provided vendor images was tested with 11.0.0_r3

Getting the sources

To build latest Android 11 AOSP tag

• Clone the latest AOSP code (For example android-11.0.0_r3 tag)

repo init -u https://android.googlesource.com/platform/manifest -b android-11.0.0_r3

• Add Essential mata repo (master branch)

mkdir -p device/essential
cd device/essential
git clone https://github.com/EssentialOpenSource/device_essential_mata.git mata

• Revert

https://android.googlesource.com/platform/system/sepolicy/+/61178550157fce18861ddd59fa9a6a29cf06c583%5E%21/#F2

BOARD_SEPOLICY_VERS := 29.0 doesn't build and without it the wrong mapping (1000) is created and 29.0 one is empty. For now, reverting this patch for the AOSP build (OK with GSI)

Building

• Download prebuilt vendor-QQ1A.200105.088.img
• Extract in device/essential/mata
• Start a build

source build/envsetup.sh
lunch mata-userdebug
make -j16

• Flash boot, system and vendor (unlock device only)

To flash GSI

• Get the latest GSI for Android 11/Android 10
• Tested with QJR1.191112.001 and RPP1.200123.016.A1
• Flash the userdebug open source build (see above)
• Disable verity (GSI image don't have any verity metadata)

adb root
adb disable-verity

• Flash GSI system image

fastboot flash system_a system.img

• Erase userdata

fastboot format userdata

• Reboot