drm/i915/dsi: Ensure the HW is powered during HW state readout
authorImre Deak <imre.deak@intel.com>
Fri, 12 Feb 2016 16:55:19 +0000 (18:55 +0200)
committerImre Deak <imre.deak@intel.com>
Wed, 17 Feb 2016 14:17:34 +0000 (16:17 +0200)
commit3f3f42b887fbffc3353e44ef9f32456c19ae4280
tree02aa27dbb33538a05be5ac53861ba25a3e9ea30d
parent6fa9a5ecf7a54450b255229ac1fc6df276cf0653
drm/i915/dsi: 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/1455296121-4742-11-git-send-email-imre.deak@intel.com
drivers/gpu/drm/i915/intel_dsi.c