set up a legacy Raspberry 1 with a fresh Digi board. Running fresh / current Archlinux with Kernel 4.4.22-1-ARCH. I'm using overlays. Activated the "dtoverlay=hifiberry-digi". Plus I'm able to use the Digi board as sound device.
As this might be a FAQ, but I'm seeing this in the dmesg output:
[ 15.837390] snd-hifiberry-digi soc:sound: ASoC: CODEC DAI wm8804-spdif not registered
[ 15.845636] snd-hifiberry-digi soc:sound: snd_soc_register_card() failed: -517
[ 15.955169] wm8804 1-003b: revision E
[ 15.974158] snd-hifiberry-digi soc:sound: wm8804-spdif <-> 20203000.i2s mapping ok
Did I overlook something in /boot/config.txt? Does i2c / i2s needs extra lines in config.txt?
Or is everything OK and alright? See attached screenshot w/ config.txt