tree 022d9c34fe50bdbc815c22494c025b34b16aa6d5
parent 31feb61a688bd4b1c1cb66cc24d931ee77826d93
author Imre Deak <imre.deak@intel.com> 1455296121 +0200
committer Jani Nikula <jani.nikula@intel.com> 1456155880 +0200

drm/i915/lvds: 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/1455296121-4742-13-git-send-email-imre.deak@intel.com
(cherry picked from commit ecb2448218acf23c401434c26be256147833b221)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>