Because of the heat problem at high temperatures, we are considering reducing the power consumption of the IC.
In the ADV7610, is there a setting to reduce power consumption, for example, by lowering the drive current?
Power consumption is directly related to the pixel clock rate. The power numbers on the data sheet are for UXGA60. Depending on the format the power can be less. I do not have any hard data for power at different format.
The chip setting you are referring to is related to the digital output drive strengths and is set based on your board design. If you put this to low you will not be saving any real power and the board may not work correctly.