We are using the ADV7619 in an application where we dynamically set the device according to the incoming resolution.
When switching between 2K and 4K (and vice versa) we reset the device before re-configuring it for the appropriate input. The main reason for the reset is that the recommended settings and configuration scripts adjust registers that are undocumented, so the assumption is that the reset will set these back to the (unknown) default values.
Is there a better way to deal with the change in configuration, for example by reading the values of these registers at power-up to determine the default value.
An example of one of these registers is:
HDMI_MAP, Register 3D, value 0x10 - Only written in 2K mode.