Yesterday I got an interesting email related to dcaenc support.
The person has an "XFX nForce 780i SLI" MCP board:
http://www.nvidia.com/object/product_nforce_780i_sli_us.html , http://www.evga.com/support/manuals/files/132-CK-NF78.pdf
As you see on page 18 of the manual, this board has no HDMI output, but
there is an optical SPDIF. Strangely enough, this SPDIF is his "hdmi:CARD=NVidia,DEV=0" device.
Given the recent discussions related to dynamically creating PCM devices
for HDMI, I think you will be interested in this alsa-info output.
Is there anything here that would need special treatment by ALSA or
PulseAudio? Or, is this just a misnumbered/misnamed codec?
Check whether BIOS set the internal spdif as HDMI as pin default
The alsa driver prefer HDMI instead of SPDIF when there are two Digital Outs