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

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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 ecb2448218)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

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Imre Deak 2016-02-12 18:55:21 +02:00 • committed by Jani Nikula

parent 31feb61a68

commit 380bdff2d0

1 changed files with 11 additions and 3 deletions

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drivers/gpu/drm/i915/intel_lvds.c

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