So you have a MacBookPro14,1, which should support audio output (not input) using the patch linked.

There is an AUR package for that audio driver: https://aur.archlinux.org/packages/snd-hda-macbookpro-dkms-git

And more info on the drivers github repo: https://github.com/davidjo/snd_hda_macbookpro

Good luck!

Chris