Methods to detect the connection and disconnection of DisplayPort

[Trumany]

Please refer to below topic for DP HPD. You can also search more related topics as reference.

Configuring Xavier NX DP1_HPD as DP hotplug detection

On a custom carrier-board, I have two type-c connectors, wired to DP0 and DP1. DP0 works fine, but debugging a problem related to DP1 has raised a question: How the DP1_HPD (GPIO M.1) pin is configured as DP hotplug input? Is the configuration done only by kernel device tree or does it include something the drivers or bootloader do? The intention is to configure both outputs as similar DP outputs. The kernel device tree changes that I have tried are included at the end of this message. Acc…

DP HPD not working with production module with custom carrier

I’m having an issue that HPD on the eDP port does not seem to work. This is the third revision of a custom carrier and the same HPD level shifting circuit worked on the older revision. The only difference is that I use the production module now instead of the older A01 revision. Schematics and full boot log can be downloaded below In the log it says [ 15.051518] tegradc tegradc.1: No hpd-gpio in DT [ 15.056160] tegradc tegradc.1: DT parsed successfully [ 15.061236] tegradc tegradc.1:…