ASUS Transformer Prime (asus-tf201)
- Ion Agorria
Users owning this device
The first step to do anything with the device is unlocking, with this device its done by sideloading the unlock apk from ASUS and clicking a few buttons in the app. The apk can be found on the ASUS support page.
- 3.1 kernel based on ASUS sources with updates till Oreo support (Morpheus kernel)
- 3.4 kernel as a part of Unlegacy Android Project (Unlegacy kernel)
- Baseline kernel sources on master: https://github.com/grate-driver/linux
- Proper dts for TF201 is added
- Version: 5.11.0-rc3
- Status: Boots. Many stuff works.
How to enter flash modes
Turn tablet off if it is in the system. Then press POWER and VOL DOWN buttons till you feel the vibration. Then release the POWER only. You will enter the bootloader/fastboot. In bootloader you can navigate with VOL DOWN button and to choose option use VOL UP button.
Latest bootloader for TF201 was 10.4.2.18 and to use pmOS you need bootloader version of 10.6.1.27.5 to reach this you can use flashable via TWRP bootloader packages.
Preparing rootfs and flashing kernel:
1 $ pmbootstrap init 2 $ pmbootstrap install 3 $ pmbootstrap flasher flash_kernel
You should proceed very carefully here.
When rootfs is larger than approx. 800 MB you can flash it to the /userdata partition ONLY, if rootfs is smaller, you can flash it to /system or /userdata.
Prerequisites: TWRP, at least version 3.3.1-0, binaries for 10.6.1.27.5 bootloader are here.
First, start TWRP (go to bootloader and choose RCK) and then continue with these instructions
1 (computer) $ pmbootstrap export 2 (computer) $ adb shell 3 (twrp) $ umount /dev/block/mmcblk0p1 <- unmounting /system partition 4 (twrp) $ umount /dev/block/mmcblk0p8 <- unmounting /data partition 5 (computer again) $ adb push /tmp/postmarketOS-export/asus-tf201.img /dev/block/mmcblk0p1 <- to flash rootfs to /system partition 6 'OR' 7 (computer again) $ adb push /tmp/postmarketOS-export/asus-tf201.img /dev/block/mmcblk0p8 <- to flash rootfs to /data partition
Hardware status (mainline)
|Y||Booting||When kernel is larger than approx 8MB, initfs must be packed directly inside kernel (not into boot.img as usual), otherwise kernel won't boot. With downstream kernel it works.|
|Y||Panel||HannStar HSD101PWW2 Rev0-A00/A01 LCD SuperIPS+ HD panel through LVDS controller.|
|Y||HDMI output||HDMI works, but output is limited by 1080p due to Tegra 3 limitations.|
|Y||Touchscreen||Used Atmel MXT768E touchscreen.|
|Y||USB||One full size USB 2.0 in dock or via 40pin adapter.|
|Y||SD cards||MicroSD card and full sized SD card (recognized as USB drive) in dock.|
|Y||Internal memory||eMMC by Kingston KE4BT5D6A or Hynix H26M64002BNR.|
|P||GPS||Broadcom GPS BCM4751 is used. Device tree has proper bindings but device itself has weak signal.|
|Y||WiFi||Uses Azurewave AW-NH615 BCM4329. Wi-Fi works (best with IWD daemon: apk add iwd; rc-config del wpa_supplicant; rc-config add iwd; and HOWTO).|
|Y||Bluetooth||Uses Azurewave AW-NH615 BCM4329B1. Works fine out of the box.|
|Y||GPIO keys||There is 3 keys on GPIO: Power, Volume up, Volume down.
Additionally GPIO-keys like are LID sensor, Power adapter 15V and Audio dock line-out detect.
|Y||Vibro||Transformer Prime has GPIO based vibrator.|
|Y||Dock Keyboard||Keyboard and Trackpad work. It is handled via Nuvoton NPCE795LA0BX embedded controller and driver is mainlined.|
|Y||Battery/Charger||Driver is based on Texas Instruments bq24725 SMBus Charge Controller driver but works through pad/dock EC. Charging and charge level of both batteries are shown correctly.|
|Y||PMIC||Transformers use Texas Instruments TPS659110 PMIC and TPS62361 core regulator.|
|P||Sound||Sound codec is RT5631. Kernel driver and tegra_rt5631 glue driver prototype have been added to experimental branches. Sound appears, but barely audible, further ALSA configuration is needed.|
|N||Voice processor||Transformers use separate Fortemedia FM34NE voice processor. No mainline driver is available. Is used for voice processing and noise cancelling. Might not be needed.|
|Y||Thermal sensor||NCT1008 ON Semiconductor LM90 series thermometer.|
|Y||Orientation sensors||Include Invensense mpu3050 gyroscope with Kionix KXTF9 accelerometer and Aichi AMI306 3-axis digital compass.|
|Y||Light sensor||Driver Dyna-Image AL3010. Brightness regulation works, install iio-sensor-proxy . It's slightly oversensitive.|
|N||Front camera||Aptina mi1040 camera sensor. Grate kernel doesn't support VI yet. Mainline linux driver exists (authored by Okias) and proper nodes are added to device tree.|
|N||Rear camera||Fujitsu MBG048 image processor. Since it is broken on most TF201 is not planned to be added to support list. If you have such a need, development is welcome. Mainline driver doesn't exist.|
|P||ULP GeForce||GPU Acceleration partially works.|