Device tree for the Xiaomi Redmi Pad SE (xun)

Device specifications

Basic	Spec
SoC	Qualcomm Snapdragon 680 (6nm)
CPU	Octa-core (4x2.4 GHz Kryo 265 Gold & 4x1.9 GHz Kryo 265 Silver)
GPU	Adreno 610
Memory	4/6/8GB
Shipped Android version	13
Storage	128/256GB
MicroSD	MicroSDXC
Battery	Non-removable Li-Po 8000 mAh
Dimensions	255.5 x 167.1 x 7.4 mm
Display	1200 x 1920 pixels, 11 inches
Rear Camera	8 MP, f/2.0, (wide), 1/4", 1.12µm, AF
Front Camera	5 MP, f/2.2, (ultrawide), 1/5", 1.12µm

Device Picture

Building LineageOS 24.0 (Android 17)

repo init -u https://github.com/LineageOS/android.git -b lineage-24.0 --git-lfs
git clone https://github.com/decoder-dev/local_manifests -b lineage-24.0 .repo/local_manifests
repo sync -c -j$(nproc --all) --force-sync --no-clone-bundle --no-tags
source build/envsetup.sh
breakfast xun
m bacon

local_manifests lists every repository the build needs on top of the LineageOS 24.0 manifest.

Notes

• Bengal is a UM 4.19 platform for hardware/qcom-caf/common, but this device runs a 5.15 GKI kernel with the AudioReach audio stack. hardware_qcom-caf_common is the LineageOS repository plus one commit that selects the sm6225 HALs and the sm8550 vendor sepolicy for bengal when TARGET_KERNEL_VERSION is 5.15.
• The Xiaomi QTI sepolicy that used to come from a forked hardware/xiaomi lives in sepolicy/, so the official hardware/xiaomi is used.
• The sm6225 HALs and the prebuilt kernel come from Xiaomi-Redmi-Pad-SE-Resources, which has no lineage-24.0 branches yet, so their lineage-23.2 branches are used.
• Face unlock is LMODroid's software implementation (FaceUnlock, yifan). It uses the front camera and open TFLite models, and needs the face unlock commits in android_frameworks_base. It is a Class 2 (weak) biometric with no liveness check, so a photo can fool it, and it cannot unlock apps that require strong biometrics.