Re: [PATCH v6 2/4] HID: playstation: add microphone mute support for DualSense.

On Sun, 14 Feb 2021 16:45:47 -0800
Roderick Colenbrander [off-list ref] wrote:

From: Roderick Colenbrander <roderick.colenbrander@sony.com>

The DualSense controller has a built-in microphone exposed as an
audio device over USB (or HID using Bluetooth). A dedicated
button on the controller handles mute, but software has to configure
the device to mute the audio stream.

This patch captures the mute button and schedules an output report
to mute/unmute the audio stream as well as toggle the mute LED.

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>

Is the microphone supported via Linux? I.e. is there an audio driver
for it?

If it is, look at the audio-micmute LED trigger.

If you can't use the audio-micmute trigger because the microphone isn't
supported via Linux, I still think the LED should the LED should be
read-write. You can then register a LED private trigger. The driver should
change the state of the LED according to the microphone mute state only
if these trigger is enabled.

Marek