the ADV7125 datasheet, about the clock pulse width, defined as below table By the table, we can get below information, when fclk_max=140MHz, the minial clock pulse width is 2.85ns, when fclk_max=240MHz, the minial clock pulse width is 1.875ns, in customer application, the fclk_max is 165MHz, they want to know at the 165MHz, what's the requirment on minimal clock pulse width value? in another word, do you think 2.85ns is OK for 165MHz application?
BTW, customer said their clock pulse width is bigger than 1.875ns and smaller than 2.85ns.