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drm/i915/dp: Flush any outstanding work to turn the VDD off

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As we may kick off a delayed workqueue task to switch of the VDD lines, we
need to complete that task prior to turning off the panel (which itself
depends upon VDD being off).

v2: Don't cancel the outstanding work as this may trigger a deadlock

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2012-04-16 22:43:42 +01:00 committed by Daniel Vetter
parent 8aaa81a166
commit 17038de5f1
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/intel_dp.c
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@ -1128,6 +1128,7 @@ static void ironlake_edp_panel_off(struct intel_dp *intel_dp)
DRM_DEBUG_KMS("Turn eDP power off\n");
WARN(intel_dp->want_panel_vdd, "Cannot turn power off while VDD is on\n");
ironlake_panel_vdd_off_sync(intel_dp); /* finish any pending work */
pp = ironlake_get_pp_control(dev_priv);
pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE);