We will be getting the I2S audio stream from the HDMI and in looking at ADV7619 reference manual it lists AP1 and AP2 as supporting I2S data on page 65, but the ADV7619 (Rev. D) technical document shows on page 11 that AP1 doesn't support I2S. Typo mistake?
Yes, that's confusing. HBR = Compressed audio in I2S format.
It looks like the ADV7612 datasheet has a better description of these pins.