Some are automatic.

As to the nonworkiong HDMI, I am running into folk that don't know their PC. That is a poor soul was showing me his PC and the dead HDMI port on the PC but the port was on the motherboard and was not supposed to work without certain CPUs. Some CPUs have graphics onboard, some do not.

As to HDMI input on a PC, too rare. You would have that in some addon card and have paid hundreds for that. So 100% unlikely.