Using the datasheet for reference I made a PCB with only the AD8195. When the PCB is connected to a computer that has a HDMI output it works fine at resolution of 1920x1080.
The primary computer has a Nvidia Quadro graphics card with only Displayport outputs which works with the same monitor using a Displayport to HDMI cable. If the AD8195 is connected between the Nvidia Quadro and the monitor the computer recognizes the monitor but the monitor shows nothing.
Could this be a level shift problem with Displayport?
Problem is the same with preemphasis disabled or enabled.
3.3V is connected to VTTO, VTTI, Vref_Out and AVCC. 5v is connected to Vref_In.
Decoupling capacitors on all power pins.