OrangePi Zero ALSA hardware not found on mainline

[gtr33m]

I'm trying to use an OrangePi Zero as an Alexa device, using github.com/alexa-pi/AlexaPi.  This is headless, but I need analogue out and in.

 

Given that it's headless, I thought I'd use the mainline kernel instead of headless.  Everything installs fine, but ALSA does not see anysound card hardware.

 

aplay: device_list:268: no soundcards found...

 

I can try legacy, but I'd prefer to use mainline if possible.