SYNOPSIS

void drm_atomic_state_clear(struct drm_atomic_state * state);

ARGUMENTS

state

atomic state

DESCRIPTION

When the w/w mutex algorithm detects a deadlock we need to back off and drop all locks. So someone else could sneak in and change the current modeset configuration. Which means that all the state assembled in state is no longer an atomic update to the current state, but to some arbitrary earlier state. Which could break assumptions the driver's ->atomic_check likely relies on.

Hence we must clear all cached state and completely start over, using this function.

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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