SYNOPSIS

struct drm_atomic_state * drm_atomic_helper_suspend(struct drm_device * dev);

ARGUMENTS

dev

DRM device

DESCRIPTION

Duplicates the current atomic state, disables all active outputs and then returns a pointer to the original atomic state to the caller. Drivers can pass this pointer to the drm_atomic_helper_resume helper upon resume to restore the output configuration that was active at the time the system entered suspend.

Note that it is potentially unsafe to use this. The atomic state object returned by this function is assumed to be persistent. Drivers must ensure that this holds true. Before calling this function, drivers must make sure to suspend fbdev emulation so that nothing can be using the device.

RETURNS

A pointer to a copy of the state before suspend on success or an ERR_PTR- encoded error code on failure. Drivers should store the returned atomic state object and pass it to the drm_atomic_helper_resume helper upon resume.

AUTHORS

Jesse Barnes <[email protected]>
Intel Corporation,         
        

Initial version

Laurent Pinchart <[email protected]>
Ideas on board SPRL,         
        

Driver internals

Daniel Vetter <[email protected]>
Intel Corporation,         
        

Contributions all over the place

Lukas Wunner <[email protected]>

vga_switcheroo documentation

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