This application is directed to controlling display power consumption of a display panel by dynamically adjusting the voltage level of the display power supply. The display panel includes a plurality of display pixels, each driven by the display power supply. Video data corresponds to an image frame to be displayed on the display panel and includes a plurality of multibit data items. Each display pixel is associated with a respective multibit data item defining a magnitude of a drive current of the respective display pixel. A first multibit data item is identified in the video data for a first display pixel to be driven to provide a corner luminance level on the image frame. A corner drive voltage is determined among a plurality of drive voltages of the display pixels based on the first multibit data item and applied to adjust the voltage level of the display power supply.