drm/i915: take a power domain reference while checking the HDMI live status

ideak · ideak · commit 29bb94bb4dc1 · 2015-11-20T11:48:57.000+02:00
There are platforms that don't need the full GMBUS power domain (BXT) while others do (PCH, VLV/CHV). For optimizing this we would need to add a new power domain, but it's not clear how much we would benefit given the short time we hold the reference. So for now let's keep things simple. v2: - fix commit message, PCH won't take any redundant power resource after this change (Ville) Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> [fix commit message in v2 (Imre)] Link: http://patchwork.freedesktop.org/patch/msgid/1447959301-1263-2-git-send-email-imre.deak@intel.com
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1393,6 +1393,8 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
 	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
 		      connector->base.id, connector->name);
 
+	intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS);
+
 	while (!live_status && --retry) {
 		live_status = intel_digital_port_connected(dev_priv,
 				hdmi_to_dig_port(intel_hdmi));
@@ -1412,6 +1414,8 @@ intel_hdmi_detect(struct drm_connector *connector, bool force)
 	} else
 		status = connector_status_disconnected;
 
+	intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS);
+
 	return status;
 }
 
