tree 1690e19f09e0cf0833411c94f839cd21d94fbf74
parent fe97fd7eb87255883ae1da2d726baaae2b50e80d
author Imre Deak <imre.deak@intel.com> 1455296120 +0200
committer Jani Nikula <jani.nikula@intel.com> 1456155879 +0200

drm/i915/hdmi: Ensure the HW is powered during HW state readout

The assumption when adding the intel_display_power_is_enabled() checks
was that if it returns success the power can't be turned off afterwards
during the HW access, which is guaranteed by modeset locks. This isn't
always true, so make sure we hold a dedicated reference for the time of
the access.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1455296121-4742-12-git-send-email-imre.deak@intel.com
(cherry picked from commit 5b0921748c0b1d0362bbfa802dc25a5c23de7e76)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>