drm/i915: Keep track of active forcewake domains in a bitmask
authorTvrtko Ursulin <tvrtko.ursulin@intel.com>
Tue, 4 Oct 2016 08:29:17 +0000 (09:29 +0100)
committerTvrtko Ursulin <tvrtko.ursulin@intel.com>
Tue, 4 Oct 2016 10:09:59 +0000 (11:09 +0100)
commit003342a50021132603180d98e49bd17d63e38ccf
treec332f08ff5f158a6721ca70a50002e8be0cb4a39
parente9b825f4e98c53213072dd6f1dedaed82994a450
drm/i915: Keep track of active forcewake domains in a bitmask

There are current places in the code, and there will be more in the
future, which iterate the forcewake domains to find out which ones
are currently active.

To save them from doing this iteration, we can cheaply keep a mask
of active domains in dev_priv->uncore.fw_domains_active.

This has no cost in terms of object size, even manages to shrink it
overall by 368 bytes on my config.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: "Paneri, Praveen" <praveen.paneri@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
drivers/gpu/drm/i915/i915_drv.h
drivers/gpu/drm/i915/intel_uncore.c