drm/i915/pps: abstract intel_pps_vdd_off_sync

Add a locked version of intel_pps_vdd_off_sync_unlocked() that does
everything the callers expect it to. No functional changes.

v2: Fix typo (Anshuman)
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1e722290208d827c5cae107fe41dbfe41a494793.1610127741.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_dp.c

@@ -6300,17 +6300,8 @@ void intel_dp_encoder_flush_work(struct drm_encoder *encoder)
 	struct intel_dp *intel_dp = &dig_port->dp;
 
 	intel_dp_mst_encoder_cleanup(dig_port);
-	if (intel_dp_is_edp(intel_dp)) {
-		intel_wakeref_t wakeref;
 
-		cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
-		/*
-		 * vdd might still be enabled do to the delayed vdd off.
-		 * Make sure vdd is actually turned off here.
-		 */
-		with_intel_pps_lock(intel_dp, wakeref)
-			intel_pps_vdd_off_sync_unlocked(intel_dp);
-	}
+	intel_pps_vdd_off_sync(intel_dp);
 
 	intel_dp_aux_fini(intel_dp);
 }
@@ -6326,18 +6317,8 @@ static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
 void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder)
 {
 	struct intel_dp *intel_dp = enc_to_intel_dp(intel_encoder);
-	intel_wakeref_t wakeref;
-
-	if (!intel_dp_is_edp(intel_dp))
-		return;
 
-	/*
-	 * vdd might still be enabled do to the delayed vdd off.
-	 * Make sure vdd is actually turned off here.
-	 */
-	cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
-	with_intel_pps_lock(intel_dp, wakeref)
-		intel_pps_vdd_off_sync_unlocked(intel_dp);
+	intel_pps_vdd_off_sync(intel_dp);
 }
 
 void intel_dp_encoder_shutdown(struct intel_encoder *intel_encoder)
@@ -7191,13 +7172,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
 	return true;
 
 out_vdd_off:
-	cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
-	/*
-	 * vdd might still be enabled do to the delayed vdd off.
-	 * Make sure vdd is actually turned off here.
-	 */
-	with_intel_pps_lock(intel_dp, wakeref)
-		intel_pps_vdd_off_sync_unlocked(intel_dp);
+	intel_pps_vdd_off_sync(intel_dp);
 
 	return false;
 }

drivers/gpu/drm/i915/display/intel_pps.c

@@ -637,7 +637,7 @@ void intel_pps_vdd_on(struct intel_dp *intel_dp)
 			dp_to_dig_port(intel_dp)->base.base.name);
 }
 
-void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
+static void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 	struct intel_digital_port *dig_port =
@@ -678,6 +678,22 @@ void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp)
 				fetch_and_zero(&intel_dp->vdd_wakeref));
 }
 
+void intel_pps_vdd_off_sync(struct intel_dp *intel_dp)
+{
+	intel_wakeref_t wakeref;
+
+	if (!intel_dp_is_edp(intel_dp))
+		return;
+
+	cancel_delayed_work_sync(&intel_dp->panel_vdd_work);
+	/*
+	 * vdd might still be enabled due to the delayed vdd off.
+	 * Make sure vdd is actually turned off here.
+	 */
+	with_intel_pps_lock(intel_dp, wakeref)
+		intel_pps_vdd_off_sync_unlocked(intel_dp);
+}
+
 void edp_panel_vdd_work(struct work_struct *__work)
 {
 	struct intel_dp *intel_dp =

drivers/gpu/drm/i915/display/intel_pps.h

@@ -29,7 +29,6 @@ void intel_pps_backlight_power(struct intel_connector *connector, bool enable);
 
 bool intel_pps_vdd_on_unlocked(struct intel_dp *intel_dp);
 void intel_pps_vdd_off_unlocked(struct intel_dp *intel_dp, bool sync);
-void intel_pps_vdd_off_sync_unlocked(struct intel_dp *intel_dp);
 void intel_pps_on_unlocked(struct intel_dp *intel_dp);
 void intel_pps_off_unlocked(struct intel_dp *intel_dp);
 void edp_panel_vdd_work(struct work_struct *__work);
@@ -38,6 +37,7 @@ void intel_pps_vdd_sanitize(struct intel_dp *intel_dp);
 void intel_pps_vdd_on(struct intel_dp *intel_dp);
 void intel_pps_on(struct intel_dp *intel_dp);
 void intel_pps_off(struct intel_dp *intel_dp);
+void intel_pps_vdd_off_sync(struct intel_dp *intel_dp);
 bool intel_pps_have_power(struct intel_dp *intel_dp);
 
 void wait_panel_power_cycle(struct intel_dp *intel_dp);