Method and system for accessing display configuration information in a multi-GPU system using hot-plug detection signals

摘要

One embodiment of the present invention sets forth a method for accessing display configuration information of a display device in a multi-graphics-processing-unit (multi-GPU) system based on a hot-plug detection signal associated with the same display device. The method includes the steps of changing the power state of a discrete GPU (dGPU) in the multi-GPU coupled to the display device after having detected an assertion of the hot-plug detection signal, retrieving the display configuration information of the display device with the dGPU, and powering down the dGPU after having retrieved the display configuration information.

主权项

1. A method for obtaining an extended display identification data (EDID) signal associated with a display device in a multi-graphics-processing-unit (multi-GPU) system based on a hot-plug detection (HPD) signal also associated with the display device, the method comprising:
learning, from an embedded controller, that the HPD signal has been generated; in response to learning of the HPD signal, setting a flag associated with fetching the EDID signal; after setting the flag, causing a discrete GPU (dGPU) that is coupled to the display device to power on; loading and initializing a driver corresponding to the powered-on dGPU; causing the powered-on dGPU to confirm that the flag is still set; causing the powered-on dGPU to obtain the EDID signal; and causing the powered-on dGPU to power off.