Multiple graphics processing unit system and method

• US 9,075,559 B2
• Filed: 02/27/2009
• Issued: 07/07/2015
• Est. Priority Date: 02/27/2009
• Status: Active Grant

• Current Assignee: NVIDIA Corporation
• Original Assignee: NVIDIA Corporation
• Inventors: Wyatt, David, Modi, Manish
• Primary Examiner(s): Wu, Xiao
• Assistant Examiner(s): He, Yingchun
• Application Number:
  US12/395,562
• Publication Number:
  US 20100220102A1
• Time in Patent Office: 2,321 Days
• Field of Search: 345/502
• US Class Current: 1/1
• CPC Class Codes: G06F 3/1438 using more than one graphics controller

Abstract

Systems and methods for utilizing multiple graphics processing units for controlling presentations on a display are presented. In one embodiment, a dual graphics processing system includes a first graphics processing unit for processing graphics information; a second graphics processing unit for processing graphics information; and a component for controlling switching between said first graphics processing unit and said second graphics processing unit. In one embodiment, the component for controlling complies with appropriate panel power sequencing operations when coordinating the switching between the first graphics processing unit and the second graphics processing unit.

Claims

1. A dual graphics processing system comprising:

a first graphics processing unit for processing graphics information;

a second graphics processing unit for processing graphics information; and

a component for controlling switching between said first graphics processing unit and said second graphics processing unit, wherein a backlighting signal is driven by said first graphics processing unit even after a switch to said second graphics processing unit.

2. A dual graphics processing system of claim 1 wherein said component for controlling switching between said first graphics processing unit and said second graphics processing unit comprises a multiplexer that forwards display component signals from said first graphics processing unit and said second graphics processing unit in accordance with a graphics processing unit selection indication.

3. A dual graphics processing system of claim 1 wherein said component for controlling switching between said first graphics processing unit and said second graphics processing unit comprises:

a first graphics processing unit display enable component for coordinating display component enablement indication from said first graphics processing unit with a graphics processing selection indication;

a second graphics processing unit display enable component for coordinating display component enablement indication from said second graphics processing unit with said graphics processing selection indication; and

a display component enable generation component for generating a display component enable signal in accordance with output of said first graphics processing unit display enable component and output of said second graphics processing unit display component.

4. A dual graphics processing system of claim 1 wherein said a first graphics processing unit display enable component and said second graphics processing unit display enable component are AND logic components and said display component enable generation component is an OR logic component.

5. A dual graphics processing system of claim 1 wherein said component for controlling conforms to panel power sequencing when coordinating said switching between said first graphics processing unit and said second graphics processing unit.

6. A dual graphics processing system of claim 1 wherein said first graphics processing unit is an internal graphics processing unit and said second graphics processing unit is a dedicated graphics processing unit.

7. A dual graphics processing system of claim 1 wherein a panel control signal transmitted from said first graphics processing unit utilized as a feedback event to trigger said switching to said second graphics processing unit.

8. A dual graphics processing system of claim 1 wherein said component for controlling switching participates in a graphics processing unit change over process comprising:

directing transitioning of a panel to a quiescent state;

changing driving of display interface signals from said first graphics processing unit to said second graphics processing unit; and

directing transitioning of said panel to an active state.

9. A dual graphics processing method comprising:

performing graphics processing on a first graphics processing unit;

forwarding results of said graphics processing from said first graphics processing unit to a display;

performing graphics processing on a second graphics processing unit; and

performing a graphics processing unit change over process in which results of said graphics processing from said second graphics processing unit are forwarded to said display instead of said results of said graphics processing from said first graphics, wherein a backlighting signal is driven by said first graphics processing unit even after a switch to said second graphics processing unit.

10. A dual graphics processing method of claim 9 wherein said first graphics processing unit is an internal graphics processing unit and said second graphics processing unit is a discrete graphics processing unit.

11. A dual graphics processing method of claim 9 wherein said graphics processing unit change over process comprises:

performing a panel power down sequence;

changing signals forwarded to said display from a first processing unit to a second processing unit; and

performing a panel power up sequence.

12. A graphics processing unit change over process of claim 9 wherein said graphics processing unit change over process comprises:

powering up a first graphics processing unit;

checking if a second graphics processing unit is powered up;

powering up a second graphics processing unit if not already powered up; and

changing information forwarded to said display from said first graphics processing unit to said second graphics processing unit.

13. A non-transitory, tangible computer readable medium with instruction embedded therein for directing a graphics processing unit change over process comprising:

directing transitioning of a panel to a quiescent state;

changing driving of display interface signals from a first graphics processor to a second graphics processor; and

directing transitioning of said panel to an active state and utilizing a panel control signal transmitted from said first graphics processing unit as a feedback event to trigger said changing to the second graphics processor, wherein at least a portion of backlight control is driven by said first graphics processor even after said changing of display interface signals from said first graphics processor to said second graphics processor.

14. A non-transitory, tangible computer readable medium of claim 13 wherein said transitioning to a quiescent state comprises performing a panel power down process.

15. A non-transitory, tangible computer readable medium of claim 13 wherein said transitioning to an active state comprises performing a panel power up process.

16. A non-transitory, tangible computer readable medium of claim 15 wherein said changing signals from a first graphics processor to a second graphics processor comprises loading drivers associated with said second graphics processing unit.

17. A non-transitory, tangible computer readable medium of claim 13 wherein independent panel power sequences are utilized in said transitioning to a quiescent state and said transitioning to said active state.