insist on support for 8-channel audio at 192kHz sample rate, so I would check
is it supported by ADV7612. In datasheet is is stated that ADV7612 supports up
to 8 channels, and up to 192kHz sample rate, but I could not verify that 192
kHz sample rate on 8 audio channels is supported.
Yes, ADV7612 supports up to 4x 192kHz I2S/uncompressed SPDIF.