On one of our boards, I'm busy implementing an HDMI receiver chip ADV7619.
Stereo Hdmi Audio works fine.
If I switch to 7.1 channel Hdmi Audio, I see the channel mode bit : AUDIO_CHANNEL_MODE, Addr 68(HDMI), Address 0x07 is changed to 1 (8-channel audio), but data is only present on the first data line.
I don't find any mute or enable configuration for the other lines.
What registers are influencing those other lines ?
PS when Muxing the AP lines, I can see the data muxing so there is no hardware issue).