Qualcomm Snapdragon 410 (MSM8916)

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Qualcomm MSM8916
Manufacturer Qualcomm
Name MSM8916
Arch AArch64
Process 28nm
Components
Audio codec v4.10-rc1


MSM8916/APQ8016 (or Snapdragon 410) is Qualcomm SoC released in 2014, with great mainline support orginally added for the Dragonboard 410c.

Audio

PulseAudio

Audio should work out of the box with PulseAudio. In your favorite PulseAudio mixer (e.g. pulsemixer on the command line) you can select the output port to use (e.g. Speaker, Earpiece, ...).

ALSA

Everything is muted by default and must be enabled through alsaucm. Unfortunately, the tool is not very user-friendly.

$ alsaucm -i -c hw:0
set _verb HiFi
set _enadev <device>

where <device> is one of Speaker, Earpiece, Headphones, PrimaryMic, HeadsetMic or SecondaryMic. alsaucm does not track which devices are already enabled, therefore it is possible to produce combinations that won't work properly (e.g. Headphones+Earpiece). To switch between devices, the old device first needs to be re-enabled and then disabled:

$ alsaucm -i -c hw:0
set _verb HiFi
set _enadev OLD
set _disdev OLD
set _enadev NEW
Warning: alsaucm sets the volume to maximum by default. It is possible to increase the volume even further, however, this may lead to permanent damage to your speaker!

Modem

To use the modem, select the mainline-modem kernel instead of mainline, and make sure to agree to the usage of non-free firmware (required for the modem).

Note that this changes the way audio is routed on the device:

  • Without modem, audio is routed directly to the audio hardware, and works without the need for non-free firmware.
  • With modem running, audio must be routed through the audio DSP, which requires non-free firmware.

Therefore you should choose the kernel depending whether or not you would like to run the modem.

Usage

At the moment, the modem is primarily tested using the oFono test scripts:

# apk add py-dbus
$ git clone https://git.kernel.org/pub/scm/network/ofono/ofono.git/
$ cd ofono/test
$ ./enable-modem
$ ./online-modem
$ ./list-modems

Check if the SIM card shows up. If you have a dual SIM device (e.g. Wileyfox Swift), follow this guide. (TODO: Maybe move this here or somewhere else?)

Unlock the SIM card:

./enter-pin pin <pin>

Eventually, your SIM card should show up as registering in ./list-modems

SMS

Use the send-sms and receive-sms test scripts (the latter requires py3-gobject3).

See also

  • MSM8916 is a great platform to get started with mainlining! It has a dedicated MSM8916 Mainlining guide that explains how to get started.