Hi Mike,
Thanks for the reply.
We have measured the HEAC+ HEAC- pin of ADV7511, and found there is no audio stream coming from TV. I think this is because we didn't do the CEC handshake stuff in our driver, so the ARC transmitter of TV hasn't been initialised.
Which pin do you mean ARC lines?
There is no option to enable ARC on TV side.
I've looked through the Linux driver for ADV7511 on ADI website, but didn't find any code related to ARC. Could you give me the sample code for ARC, since you said CEC protocol handshake is handled by ADI device drivers.
Phil