No, the DisplayPort Intel® FPGA IP does not support DP++.
Device Family: Intel® Arria® 10, Arria® V, Arria® V GZ, Intel® Cyclone® 10 GX, Cyclone® V, Stratix® V
Type: Answers
Area: Intellectual Property
Last Modified: September 29, 2018
Version Found: v17.1
Bug ID: FB: 599018;
IP: DisplayPort
Does the DisplayPort Intel® FPGA IP support DisplayPort Dual-Mode(DP++)?
Description
Workaround/Fix
Dual-Mode DisplayPort allows High Definition Multimedia Interface (HDMI) or Digital Visual Interface (DVI) to be sent through the DisplayPort electrical connector with the pin functions being re-mapped.
A DP++ capable display is fully compatible with the DisplayPort Intel® FPGA IP.
The HDMI Intel® FPGA IP which supports DVI should be used in place of the DisplayPort Intel® FPGA IP if either of these standard need to be sent through the DisplayPort connector.