KOH_Linux_runtime_freeze

Runtime Freeze and UnFreeze Display (Framebuffer and Overlay/Sprite-C)

Intel® EMGD provides support to freeze and unfreeze the video content of the Overlay/sprite-C plane and the framebuffer content through the freeze escape. The freeze API supports freezing/unfreezing individual screens or both primary and secondary screens simultaneously. When the freeze function is called, both the framebuffer and overlay plane on the specified screen freezes. Individual freezing of framebuffer or overlay/sprite-C plane is not supported. Please note that when the framebuffer is frozen, any mode change to alter the display setting such as changing the display resolution, rotation, flip or color correction will not unfreeze the framebuffer and overlay/sprite-C.

Note: This function is supported only on the MeeGo OS. To enable this function, set the following configuration option:

Option “ALL/<configID>/General/FreezeFB” “1”

Please refer to the Intel® Embedded Graphics Drivers, Intel® Embedded Media and Graphics Driver, EFI Video Driver, and Video BIOS API Reference Manual for a detailed description of the INTEL_ESCAPE_FREEZE_FB/INTEL_ESCAPE_UNFREEZE_FB Framebuffer function calls.



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Revised April 2013