Method for identifying a display when a GPU connected to the display is powered down
AssigneeNVIDIA Corporation
InventorsRambod Jacoby, David Wyatt, Yu Qing Cheng, Ludger Mimberg
Life of this patent
Estimating the term…
Abstract
Embodiments of the present disclosure provide techniques for identifying a display when a graphics processing unit (GPU) connected to the display via a display control bus is in a low power state. By providing a separate microcontroller with a parallel connection to the display control bus, the microcontroller may detect the presence of a display device even when the GPU is in the low power state. In response to detecting the display device, the microcontroller may notify a motherboard chipset (e.g., via an interrupt) prompting the motherboard chipset to initiate a sequence to bring the GPU out of the low power state.
Claims20
A method for detecting a change in display device state, comprising:
- polling an interface to detect a change in a display device connected to the interface, wherein the polling is performed when a graphics processing unit (GPU) configured to poll the interface for the change in the display device is powered down;
- and
- upon detecting the change in the display device connected to the interface, notifying a motherboard on which the GPU is connected.
An apparatus for detecting a change in display device state, comprising:
- an interface for communicating with a display device connected to the interface to detect a change in the display device connected;
- and
- change detection logic for polling, via the interface, to detect the change in the display device when a graphics processing unit (GPU) configured to poll the interface for the change in the display device is powered down and for notifying a motherboard on which the GPU is connected upon detecting the change in the display device.
A graphics subsystem, comprising:
- a graphics processing unit (GPU) capable of being dynamically placed in a low power state;
- and
- change detection logic for polling an interface to detect a change in a display device connected to the interface when a portion of the GPU configured to poll the interface for the change in the display device is powered down and for notifying a motherboard on which the GPU is connected upon detecting the change in the display device.
Dependencies are inferred from the claim text.