Re: ALSA USB quirk mixer driver question

[Lena <lena@xxxxxxxxx>]

Thanks for the reply!

So, if i understand correctly, instead of going through 
sound/usb/mixer_quirks.c, i need to create a standalone USBHID driver 
that exposes the ALSA kcontrols and then the ALSA userspace understands 
that it's the same interface and 'links' the UAC/isochronous audio part 
and the standalone ALSA mixer kcontrol part that has the volume knobs, 
mute, output select and input impedance/phantom power/headphone gain 
switches such that an userspace application (like alsamixer) treats it 
all as a single thing.

Does this driver then belong in sound/usb/ (given it imports the API in 
<sound/control.h>) or somewhere else (e.g. drivers/hid/usbhid/, 
drivers/usb/)?

Thanks again,

Lena