HDCP 2.2 is limited to 32 devices inclusive of any individual device in the chain weather it is a source, repeater, or a sink, and only 4 levels deep between source and sink inclusive.


if you want to go deeper, here 's a guide to the hand shake implementation on hdmi
[Link: digital-cp.com]

other connection form factor's specifications
[Link: digital-cp.com]

Biamp's tesira lux training has the best training content i've seen on HDCP 2.2,