drm_atomic_helper_duplicate_state — duplicate an atomic state object
struct drm_atomic_state * drm_atomic_helper_duplicate_state ( | struct drm_device * dev, |
struct drm_modeset_acquire_ctx * ctx); |
Makes a copy of the current atomic state by looping over all objects and duplicating their respective states.
Note that this treats atomic state as persistent between save and restore. Drivers must make sure that this is possible and won't result in confusion or erroneous behaviour.
Note that if callers haven't already acquired all modeset locks this might
return -EDEADLK, which must be handled by calling drm_modeset_backoff.