intel_aux_display_runtime_get — grab an auxiliary power domain reference
void intel_aux_display_runtime_get ( | struct drm_i915_private * dev_priv); |
This function grabs a power domain reference for the auxiliary power domain (for access to the GMBUS and DP AUX blocks) and ensures that it and all its parents are powered up. Therefore users should only grab a reference to the innermost power domain they need.
Any power domain reference obtained by this function must have a symmetric
call to intel_aux_display_runtime_put to release the reference again.