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drm/i915/eDP: When enabling panel VDD cancel pending disable worker

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Before testing if the panel VDD is enabled on eDP cancel any pending
disable worker. This makes sure the worker will be triggered with a
delay from the last time edp_panel_vdd_schedule_off() is called, not
the first time. This avoids unnecessary overhead.

https://bugs.freedesktop.org/show_bug.cgi?id=86201

v2: use cancel_delayed_work() instead of cancel_delayed_work_sync()
as the pps_mutexes will provide the required serialization with
edp_panel_vdd_work() while the sync variant may deadlock. Suggested
by Ville Syrjälä <ville.syrjala@linux.intel.com>.
Made commit message a bit clearer.

Signed-off-by: Egbert Eich <eich@suse.de>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Egbert Eich 2014-11-25 12:54:57 +01:00 committed by Daniel Vetter
parent 9d8b0588cb
commit 2c623c11c7
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/i915/intel_dp.c
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@ -1503,6 +1503,7 @@ static bool edp_panel_vdd_on(struct intel_dp *intel_dp)
if (!is_edp(intel_dp))
return false;
cancel_delayed_work(&intel_dp->panel_vdd_work);
intel_dp->want_panel_vdd = true;
if (edp_have_panel_vdd(intel_dp))