LineageOS 17.1 for Xiaomi Mi Mix 3 5G

Create directories

$ mkdir lineage-17.1
$ cd lineage-17.1

Init lineage:

$ repo init -u git://github.com/LineageOS/android.git -b lineage-17.1

Download and move the manifest xml for the device you want to .repo/local_manifests/

Then sync up with this command:

$ repo sync

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Building from source

$ . build/envsetup.sh
$ lunch lineage_andromeda-userdebug
$ mka bacon

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Patch notes

Some changes are required from stock LineageOS in order to fix some issues.

Frameworks base requires this commit to fix Always On Display not entering deep sleep:

https://github.com/crdroidandroid/android_frameworks_base/commit/20e5811d89084a9bf8002e08e513273c94024341

Open source display stack requires a CAF display HAL. Lineage display HAL is incompatible, the required modification has been made to the manifest.