Jasper Lake EDS Vol1
More Features of Display Controller
Panel Self Refresh (PSR)
PSR is an eDP feature that allows refresh to stop when the image is unchanging. Panel support is required for PSR1 and PSR2 capabilities. Display Engine (DE) can disable the eDP link and stop reading pixels from memory. The panel stores the unchanging image in it’s Remote Frame Buffer (RFB).
DE tracks image changes and automatically enters and exits PSR. Panel Self Refresh 2 (PSR2) adds several enhancements, including selective update.