thesofproject
[FEATURE] Mic mute light support
It would be nice if there was mute light support in sof. I wrote about this in detail here, but it seems something in the stack (and I'm not aware of where this happening), is triggering my audio light on mute, when I run
pactl set-sink-mute @DEFAULT_SINK@ toggle
But that functionality is weirdly absent in,
pactl set-source-mute @DEFAULT_SOURCE@ toggle
But that would be tremendously useful for writing a simply global-push to talk with a visual indicator of when you're not hot.
(This very very likely doesn't belong on your board, I just don't know where to put it. Feel free to point me in another direction if that functionality is not in sof and shouldn't be homed there. I see in some places they suggest things like this options snd-hda-intel model=dell-s14 to enable the mute light in some laptop builds. So it seems like this may be the right place. It would be nice if there was an option for lenovo-x1c.
I can't comment on pactl, it's been too many years since I used it.
At the SOF level, we have an ALSA control to mute the DMIC, and there's a token to define whether the control is associated with an LED. that's about the extent of the involvement of the SOF topology+driver wrt the LED mutes.
The bulk of the work is done in UCM, there is a mapping from the ALSA control to LEDs, see e.g. ucm2/Intel/sof-hda-dsp/sof-hda-dsp.conf
it's entirely possible that this LED only worked on Dell devices.
Adding @perexg for more comments since he's probably the most knowledgeable on this LED support
well, i have to install alsa-utils package to make the lighting work, not sure why
