How to check resolution of HDMI slot and DP connector

Hello ,

We are using a custom carrier board having DP {DP 1.4 with 4K resolution} connector and HDMI slot {HDMI 2.0 with 4K resolution}

How can i detect the device connected to both (DP & HDMI) the slots and
How to find/measure the resolution of both the slots.

Is there any display manager running on your set up?

Sir ,
I am not sure about it, how to confirm it.

If this is still the same desktop setting as default jetpack, then you can use xrandr command to get the resolution info.