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drm/i915: Reset power sequencer pipe tracking when disp2d is off

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The power sequencer loses its state when the disp2d power well is down.
Clear the dev_priv->pps_pipe tracking so that the power sequencer state
gets reinitialized the next time it's needed.

v2: Fix the pps_mutex vs. power_domain mutex deadlock by taking power
    domain reference first
v3: Rename from edp_pps_(un)lock() to just pps_(un)lock() for the future,
    update due to backlight code changes

Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä
2014-09-04 14:54:56 +03:00
committed by Daniel Vetter
parent a4a5d2f8a9
commit 773538e860
3 changed files with 107 additions and 57 deletions
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2
drivers/gpu/drm/i915/intel_pm.c
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@@ -6468,6 +6468,8 @@ static void vlv_display_power_well_disable(struct drm_i915_private *dev_priv,
spin_unlock_irq(&dev_priv->irq_lock);
vlv_set_power_well(dev_priv, power_well, false);
vlv_power_sequencer_reset(dev_priv);
}
static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv,