Originally Posted by primerib
There is a new rewrite of the Nvidia HDMI driver that was just submitted to the alsa maintainer on the alsa-devel mailing list yesterday I believe. Hopefully very soon we'll have support for audio-over-HDMI with GT2XX cards in vanilla alsa.
I'll check the git head. Thanks for the heads up!
EDIT: Nothing committed to alsa-kmirror yet. To the mailing list!
FURTHER EDIT: Relevant post.
In light of that I'm not going to put any more coding effort into this (but I'll continue supporting the thread and watching for the code to drop in ALSA). Wei Ni will certainly do a better job than I ever could.