What They Say
VESA updated DisplayPort to V2.1 which supersedes V2.0 and VESA said that all DP 2.0 certified products could support DP 2.1. The changes to the specification align DP better to USB Type-C and USB4 so that there is common PHY servicing both DisplayPort and USB4.
DisplayPort 2.1 has added a new DisplayPort bandwidth management feature to enable DisplayPort tunneling to coexist with other I/O data traffic more efficiently over the USB4 link. This increased efficiency is on top of mandated support for VESA’s visually lossless Display Stream Compression (DSC) codec and VESA’s Panel Replay capability. DSC bitstream support can reduce DisplayPort transport bandwidth in excess of 67 percent without visual artifacts, while VESA’s Panel Replay capability can reduce DisplayPort tunneling packet transport bandwidth in excess of 99 percent when Panel Replay operation is taking place.
What We Think
This seems an OK move to improve the compatibility of DP with USB4. However, there was no mention in the press release of the latest USB4 V1 which supports 80Gbps. Of course, DP supported up to 80Gbps with four lanes of DP. I plan to dig into this a bit more, but the announcement coincided with a busy travel schedule this week. (BR)
