We have an requirement to capture 12-bit (per channel), YCbCr 4:2:2 HDMI video using ADV7612 on one of our boards. I understand that ADV7612 can receive deep color HDMI input with 12-bit per channel. However for our use case we can configure the pixel output port of this device only to 8/16-bit, YCbCr 4:2:2 mode. We have not connected the pixel pins required for 12/24-bit YCbCr 4:2:2 video output.
How will the ADV7612 device perform 12-bit to 8-bit conversion in this case?