drm/i915/debugfs: move debug printing to intel_display_power.c

The debugfs should have no special privileges to look into the
implementation guts. Move the actual debug printing of power domains to
intel_display_power.c.

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211116171434.20516-3-jani.nikula@intel.com

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

@@ -471,28 +471,9 @@ DEFINE_SIMPLE_ATTRIBUTE(i915_edp_psr_debug_fops,
 
 static int i915_power_domain_info(struct seq_file *m, void *unused)
 {
-	struct drm_i915_private *dev_priv = node_to_i915(m->private);
-	struct i915_power_domains *power_domains = &dev_priv->power_domains;
-	int i;
-
-	mutex_lock(&power_domains->lock);
-
-	seq_printf(m, "%-25s %s\n", "Power well/domain", "Use count");
-	for (i = 0; i < power_domains->power_well_count; i++) {
-		struct i915_power_well *power_well;
-		enum intel_display_power_domain power_domain;
-
-		power_well = &power_domains->power_wells[i];
-		seq_printf(m, "%-25s %d\n", power_well->desc->name,
-			   power_well->count);
-
-		for_each_power_domain(power_domain, power_well->desc->domains)
-			seq_printf(m, "  %-23s %d\n",
-				 intel_display_power_domain_str(power_domain),
-				 power_domains->domain_use_count[power_domain]);
-	}
+	struct drm_i915_private *i915 = node_to_i915(m->private);
 
-	mutex_unlock(&power_domains->lock);
+	intel_display_power_debug(i915, m);
 
 	return 0;
 }

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

@@ -6397,3 +6397,28 @@ void intel_display_power_resume(struct drm_i915_private *i915)
 		hsw_disable_pc8(i915);
 	}
 }
+
+void intel_display_power_debug(struct drm_i915_private *i915, struct seq_file *m)
+{
+	struct i915_power_domains *power_domains = &i915->power_domains;
+	int i;
+
+	mutex_lock(&power_domains->lock);
+
+	seq_printf(m, "%-25s %s\n", "Power well/domain", "Use count");
+	for (i = 0; i < power_domains->power_well_count; i++) {
+		struct i915_power_well *power_well;
+		enum intel_display_power_domain power_domain;
+
+		power_well = &power_domains->power_wells[i];
+		seq_printf(m, "%-25s %d\n", power_well->desc->name,
+			   power_well->count);
+
+		for_each_power_domain(power_domain, power_well->desc->domains)
+			seq_printf(m, "  %-23s %d\n",
+				   intel_display_power_domain_str(power_domain),
+				   power_domains->domain_use_count[power_domain]);
+	}
+
+	mutex_unlock(&power_domains->lock);
+}

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

@@ -391,6 +391,8 @@ intel_display_power_put_all_in_set(struct drm_i915_private *i915,
 	intel_display_power_put_mask_in_set(i915, power_domain_set, power_domain_set->mask);
 }
 
+void intel_display_power_debug(struct drm_i915_private *i915, struct seq_file *m);
+
 /*
  * FIXME: We should probably switch this to a 0-based scheme to be consistent
  * with how we now name/number DBUF_CTL instances.