Resynchronization of a display system and GPU after panel self refresh

A method comprising:

• receiving, at a processing unit from a display system, first timing information indicating a current scanout line of the display system in response to initiating an exit from a panel self-refresh (PSR) mode;
• scheduling transmission of a subsequent frame from the processing unit to the display system at a subsequent time, during the PSR mode, indicated by the current scanout line;
• and
• transmitting the subsequent frame to the display system at the subsequent time.

An apparatus, comprising:

• a screen to display images within a range of refresh rates;
• a buffer to store frames received from a processing unit;
• and
• a processing element configured to provide images to the screen based on the frames stored in the buffer, wherein the processing element is configured to receive, prior to entering a panel self-refresh (PSR) mode, first timing information indicating a first refresh rate that is lower than a maximum refresh rate and to refresh images, during the PSR mode, at a second refresh rate that is in the range of refresh rates up to the first refresh rate using a frame stored in a buffer prior to entering the PSR mode.