intel_uncore_forcewake_get — grab forcewake domain references
void intel_uncore_forcewake_get ( | struct drm_i915_private * dev_priv, |
enum forcewake_domains fw_domains); |
This function can be used get GT's forcewake domain references.
Normal register access will handle the forcewake domains automatically.
However if some sequence requires the GT to not power down a particular
forcewake domains this function should be called at the beginning of the
sequence. And subsequently the reference should be dropped by symmetric
call to intel_unforce_forcewake_put. Usually caller wants all the domains
to be kept awake so the fw_domains would be then FORCEWAKE_ALL.