@@ -895,9 +895,7 @@ pps_lock(struct intel_dp *intel_dp)
* See intel_power_sequencer_reset() why we need
* a power domain reference here.
*/
- wakeref = intel_display_power_get(dev_priv,
- intel_aux_power_domain(dp_to_dig_port(intel_dp)));
-
+ wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE);
mutex_lock(&dev_priv->pps_mutex);
return wakeref;
@@ -909,9 +907,7 @@ pps_unlock(struct intel_dp *intel_dp, intel_wakeref_t wakeref)
struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
mutex_unlock(&dev_priv->pps_mutex);
- intel_display_power_put(dev_priv,
- intel_aux_power_domain(dp_to_dig_port(intel_dp)),
- wakeref);
+ intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
return 0;
}
We need a power_domain wakeref in pps_{lock,unlock} to prevent a race while resetting pps state in intel_power_sequencer_reset(). intel_power_sequencer_reset() need a pps_mutex to access pps_pipe but it can't grab pps_mutex due to deadlock with power_well functions are called while holding pps_mutex. intel_power_sequencer_reset() is called by power_well function associated with legacy platforms like vlv and chv therefore re-use the POWER_DOMAIN_DISPLAY_CORE power domain, which only used by vlv and chv display power domain. This will avoids the unnecessary noise of unrelated power wells in pps_{lock,unlock}. Cc: Jani Nikula <jani.nikula@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> --- drivers/gpu/drm/i915/display/intel_dp.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)