The amount of Key Selection Vectors (KSVs) supported by an ADI HDMI Rx may vary.
Please consult the specify parts Hardware Manual for full details.
Some examples of HDMI Rx and the number of KSV's they support are:
The ADV7844 / ADV7842 / ADV7623 / ADV7604 / ADV7840 all support up to 24 KSV’s.
The ADV7441A & AD9388A support up to 11 KSV’s.