TWRP device tree for Lenovo Legion Y700 (2025) (TB321FU)

TWRP build for Legion Tablet Y700 (2025).

See https://github.com/polygraphene/android_device_lenovo_TB320FC for Y700 2023.

Flash instructions

1. Download recovery image from release.
2. Unlock bootloader
3. Flash recovery
   • Launch bootloader then run the following command.

   fastboot flash recovery twrp-downloaded-file-name.img

Supported features

Blocking checks

• Correct screen/recovery size
• Working Touch, screen
• Backup to internal/microSD
• Restore from internal/microSD
• reboot to system
• ADB

Medium checks

• update.zip sideload
• UI colors (red/blue inversions)
• Screen goes off and on
• F2FS/EXT4 Support, exFAT/NTFS where supported
• all important partitions listed in mount/backup lists
• backup/restore to/from external (USB-OTG) storage (not supported by the device)
• backup/restore to/from adb (https://gerrit.omnirom.org/#/c/15943/)
• decrypt /data
• Correct date

Minor checks

• MTP export
• reboot to bootloader
• reboot to recovery
• poweroff
• battery level
• temperature
• encrypted backups
• input devices via USB (USB-OTG) - keyboard, mouse and disks (not supported by the device)
• USB mass storage export
• set brightness
• vibrate
• screenshot
• partition SD card

Note

1. Based on TWRP 3.7.1
2. Includes following patches
   • Add gatekeeper and boot AIDL support for /data decrytion.
     • https://github.com/polygraphene/android_hardware_interfaces/tree/android-12.1-TB321FU
   • Fix for a graphical glitch
     • https://github.com/polygraphene/android_bootable_recovery/commit/4e4dd385974e275fac5f894bf7ad00fb17004e62
   • Fix for landscape theme
     • polygraphene/android_device_lenovo_TB320FC#2 (comment)
   • Support for work profile decryption
     • TeamWin/Team-Win-Recovery-Project#1256 (comment)

Device specifications

Component	Model
SoC	Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm)
CPU	Octa-core (1x3.3 GHz Cortex-X4 & 3x3.2 GHz Cortex-A720 & 2x3.0 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)
GPU	Adreno 750
Memory	12GB / 16GB
Storage	UFS 4.0 256GB / 512GB
Battery	Li-Po 6550 mAh
Display	1600 x 2560 pixels (IPS LCD, 165Hz, 8.8 inches)
Release	2024, October

To build

# Fetch sources
repo init --depth=1 -u https://github.com/minimal-manifest-twrp/platform_manifest_twrp_aosp -b twrp-12.1
repo sync -j 20 --force-sync

# Apply patches
(cd bootable/recovery; git fetch https://github.com/polygraphene/android_bootable_recovery android-12.1-TB321FU && git checkout FETCH_HEAD)
(cd frameworks/native; git fetch https://github.com/polygraphene/android_frameworks_native android-12.1-TB321FU && git checkout FETCH_HEAD)
(cd hardware/interfaces; git fetch https://github.com/polygraphene/android_hardware_interfaces android-12.1-TB321FU && git checkout FETCH_HEAD)
(cd system/core; git fetch https://github.com/polygraphene/android_system_core android-12.1-TB321FU && git checkout FETCH_HEAD)
(cd system/extras; git fetch https://github.com/polygraphene/android_system_extras android-12.1-TB321FU && git checkout FETCH_HEAD)
(cd system/tools/aidl; git fetch https://github.com/polygraphene/android_system_tools_aidl android-12.1-TB321FU && git checkout FETCH_HEAD)
(cd system/vold; git fetch https://github.com/polygraphene/android_system_vold android-12.1-TB321FU && git checkout FETCH_HEAD)

# Build
export ALLOW_MISSING_DEPENDENCIES=true
. build/envsetup.sh
lunch twrp_TB321FU-eng
mka recoveryimage