configuring usb 2.0 audio gadget correctly via configfs?

[Bert Schiettecatte]

Hi all

I am using kernel 5.9 stable and I'm trying to configure the usb 2.0
audio gadget correctly so my device shows up as an audio interface
when I plug it into my PC or Mac. I previously was on 4.11 and had a
bunch of hacks I applied to the uac2 driver which worked fine, but a
lot has changed since then and I'm wondering if by now the gadget
works correctly out of the box, so I don't have to apply my hacks
anymore.

I'm configuring the device using configfs and that works fine, but
when I plug it into my Mac I just see zero channels and the device
name is capture or playback inactive.

Anyway, just wanted to know what the current state of things is
regarding the gadget driver and alsa.

Thanks
Bert