I guess the first question is if we can even use a clock oscillator instead of a oscillator to clock the ADV7611. As far as I have read nothing tells me that I cant.
I found in another thread (http://ez.analog.com/message/80299#80299) that it is advisable to set registers to disabling the external 1.8V on XTALP pin. Is that also needed for the ADV7611? If so, how do I do it? and How do I connect the XTALP pin, Should I just leave it floating?