Intel Working On DP 2.0 Panel Replay Power Savings For Linux
DisplayPort 2.0 brings Panel Replay as a mandatory feature for DP 2.0 monitors similar to Panel Self Refresh (PSR) with eDP displays. Panel Replay allows for only updating a portion of the display that has changed rather than the entire frame-buffer in order to conserve power.
Intel's i915 Linux kernel driver has begun preparing changes to support Panel Replay. Sent out this morning were the first five patches as a "request for comment" on this functionality. The initial patches are around the basic enablement.
Intel "Display 13" hardware and newer will support Panel Replay with DisplayPort 2.0 monitors.