What do you need to test in DisplayPort interface?

Before video and audio content is sent over a DP link and displayed on the monitor screen a lot of communication has been occurring between a DP source and sink and a possible branch device.

DisplayPort Compliance Testing

Displayport Interface: 6 Facts You should Know for Gaming & Graphic Design

VGA, DisplayPort, HDMI, DVI - differences of the interfaces

VESA Readies DisplayPort UHBR (Ultra-High Bit Rate) Device Certification and Begins Certification of UHBR Cables - VESA - Interface Standards for The Display Industry

DisplayPort: A Better Video Interface

HDMI 2.1 vs DisplayPort 1.4 Comparison - Tech Centurion

Test Happens - Teledyne LeCroy Blog: DisplayPort 2.0 Physical Layer Testing

What is DisplayPort?

3ft Panel Mount DisplayPort Cable M/F - DisplayPort Cables & Adapter Cables, Cables

DisplayPort 1.4 vs. HDMI 2.1: Which is Better for Gaming?