Purism Librem5 Devkit (purism-librem5dev)

From postmarketOS Wiki
Purism Librem 5 Devkit
Manufacturer Purism
Name Librem 5 Devkit
Codename purism-librem5dev
Released 2018
Type development board
Hardware
Chipset Emcraft NXP i.MX8M
CPU 4x 1.5 GHz Cortex-A53
GPU Vivante GC7000Lite
Display 1440x720
Storage 32 GB eMMC
Memory 3 GB
Architecture aarch64
Software
Original software PureOS
postmarketOS
Category testing
Pre-built images no
Unixbench Whet/Dhry score 869.5
Features
Flashing
Works
USB Networking
Internal storage
SD card
Battery
Screen
Works
Touchscreen
Works
Multimedia
3D Acceleration
Works
Audio
Partial
Camera
Camera Flash
Connectivity
WiFi
Works
Bluetooth
Partial
GPS
Works
NFC
Modem
Calls
SMS
Mobile data
Miscellaneous
FDE
USB OTG
Partial
HDMI/DP
Sensors
Accelerometer
Magnetometer
Ambient Light
Proximity
Hall Effect
Haptics
Barometer


Contributors

How to enter flash mode

The devkit has a switch on the same side as the reboot button, wifi switch, camera switch, and modem switch. Move it to the "USB Mode" position and hit the reboot button next to it in order to put the device into 'flash' mode.

Installation

Flashing

pmbootstrap now has support for flashing the devkit with the flasher command. After running pmbootstrap install to generate a rootfs, the devkit can be flashed by putting it into 'USB mode' and executing pmbootstrap flasher flash_rootfs

Once the image has been flashed, place the device into emmc mode and hit the reboot button to start booting postmarketOS. The first boot can take a few minutes as it resizes the rootfs to fill all available space on the emmc disk.

Graphics

The Vivante GPU in the devkit is fully supported upstream in Mesa and support for it should be installed by the device-purism-librem5dev package.

Todo

  • Bring up cellular modem
  • Resolve issues with Bluetooth
    • Bluetooth can be started by loading the rsi_91x module with dev_oper_mode=14 but this disables Wifi station/client mode and enables Wifi AP mode. It doesn't seem to work with dev_oper_mode=13, which enables Wifi client mode.
  • Test/enable camera
  • Test/enable ambient light sensor

Ofono

As of 11/2019, ofono seems to "just work" when it is installed using "apk add ofono". Reasonable-looking signal information is reported, and calls seem to do something. I could not figure out how to route in-call audio, and it is possible that separate daemon is needed for that. https://source.puri.sm/Librem5/wys/blob/master/src/wys-audio.c

See also

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