Sony Xperia Z2 Tablet (sony-castor-windy)

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Sony Xperia Z2 Tablet
Sony Xperia Z2 Tablet
Sony Xperia Z2 Tablet
Manufacturer Sony
Name Xperia Z2 Tablet
Codename sony-castor-windy
Released 2014
Original software Android 4.4.2 on Linux 3.4
Chipset Qualcomm APQ8074AB Snapdragon 801
CPU Quad-core 2.3 GHz Krait 400
GPU Adreno 330
Display 1200x1920 TFT
Storage 16/32 GB
Memory 3 GB


  • bjorn andersson (ported device to 4.3)
  • robclark (freedreno support)
  • opendata26

What works

  • Booting the system
  • Kernel log to the display
  • Framebuffer graphics
  • Unlocking the root partition
  • Display Backlight control
  • Wayland on framebuffer
  • Module loading
  • Wifi (see Additional Info below)
  • Notification led
  • Freedreno (see Additional Info below)

What does not work

  • Audio
  • Both cameras


  1. Init pmbootstrap
$ ./ init
  1. Start the build process and install flash to the device
# Replace /dev/sdX with the device for your sdcard
$ ./ install
$ ./ flasher flash_rootfs
$ ./ flasher flash_kernel



The linux-firmware (included by default) package is required to provide the brcmfmac firmware necessary for initializing the wifi device.

Once the device has been successfully initialized, enable it:

$ sudo ip link set wlan0 up

Configure wpa_supplicant (only necessary on encrypted networks):

$ sudo su -
# wpa_passphrase $YOUR_SSID > /etc/wpa_supplicant/wlan0.conf
<enter passphrase here and press Enter>
# exit

Connect to network using wpa_supplicant:

$ sudo wpa_supplicant -i wlan0 -c /etc/wpa_supplicant/wlan0.conf 

If your network uses DHCP, start the DHCP client:

$ sudo udhcpc -i wlan0


Freedreno is only supported with X and kwin atm as weston segfaults
Here are some games being played

# Install mesa and X allong with the touchscreen driver
$ sudo apk add mesa mesa-dri-freedreno xorg-server xf86-input-libinput

# Start X
$ sudo X &

Setting the date

Since the rtc driver is read only you need to use ntp to set the date

# Install openntpd
$ sudo apk add openntpd

# Write the current system time to the hardware clock
$ sudo ntp -s

Helpful Links for Porting