Our software driver for the EVAL-ADV7612-7511 has the capability to configure ADV7612/ADV7511 to transmit uncompressed/compressed audio. Furthermore, it has a command (edidmod) which will modify the ADV7612 EDID to advertise a wide range of audio capabilities. This functionality which will likely be useful for interfacing with consumer electronic equipment.
If you don't have EVAL-ADV7612-7511, I strongly suggest you purchase one.
-Matt