diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 93a148684c53..530b119a3a3b 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -5189,3 +5189,70 @@ static void intel_power_domains_verify_state(struct drm_i915_private *i915)
 }
 
 #endif
+
+void intel_display_power_suspend_late(struct drm_i915_private *i915)
+{
+	if (!HAS_DISPLAY(i915))
+		return;
+
+	if (INTEL_GEN(i915) >= 11 || IS_GEN9_LP(i915))
+		bxt_enable_dc9(i915);
+	else if (IS_HASWELL(i915) || IS_BROADWELL(i915))
+		hsw_enable_pc8(i915);
+}
+
+void intel_display_power_resume_early(struct drm_i915_private *i915)
+{
+	if (!HAS_DISPLAY(i915))
+		return;
+
+	if (INTEL_GEN(i915) >= 11 || IS_GEN9_LP(i915)) {
+		gen9_sanitize_dc_state(i915);
+		bxt_disable_dc9(i915);
+	} else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
+		hsw_disable_pc8(i915);
+	}
+}
+
+void intel_display_power_suspend(struct drm_i915_private *i915)
+{
+	if (!HAS_DISPLAY(i915))
+		return;
+
+	if (INTEL_GEN(i915) >= 11) {
+		icl_display_core_uninit(i915);
+		bxt_enable_dc9(i915);
+	} else if (IS_GEN9_LP(i915)) {
+		bxt_display_core_uninit(i915);
+		bxt_enable_dc9(i915);
+	} else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
+		hsw_enable_pc8(i915);
+	}
+}
+
+void intel_display_power_resume(struct drm_i915_private *i915)
+{
+	if (!HAS_DISPLAY(i915))
+		return;
+
+	if (INTEL_GEN(i915) >= 11) {
+		bxt_disable_dc9(i915);
+		icl_display_core_init(i915, true);
+		if (i915->csr.dmc_payload) {
+			if (i915->csr.allowed_dc_mask &
+			    DC_STATE_EN_UPTO_DC6)
+				skl_enable_dc6(i915);
+			else if (i915->csr.allowed_dc_mask &
+				 DC_STATE_EN_UPTO_DC5)
+				gen9_enable_dc5(i915);
+		}
+	} else if (IS_GEN9_LP(i915)) {
+		bxt_disable_dc9(i915);
+		bxt_display_core_init(i915, true);
+		if (i915->csr.dmc_payload &&
+		    (i915->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
+			gen9_enable_dc5(i915);
+	} else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
+		hsw_disable_pc8(i915);
+	}
+}
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h b/drivers/gpu/drm/i915/display/intel_display_power.h
index e4d2c1ba24b0..97f2562fc5d3 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power.h
@@ -232,27 +232,20 @@ struct i915_power_domains {
 	for_each_power_well_reverse(__dev_priv, __power_well)		        \
 		for_each_if((__power_well)->desc->domains & (__domain_mask))
 
-void skl_enable_dc6(struct drm_i915_private *dev_priv);
-void gen9_sanitize_dc_state(struct drm_i915_private *dev_priv);
-void bxt_enable_dc9(struct drm_i915_private *dev_priv);
-void bxt_disable_dc9(struct drm_i915_private *dev_priv);
-void gen9_enable_dc5(struct drm_i915_private *dev_priv);
-
 int intel_power_domains_init(struct drm_i915_private *dev_priv);
 void intel_power_domains_cleanup(struct drm_i915_private *dev_priv);
 void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume);
 void intel_power_domains_driver_remove(struct drm_i915_private *dev_priv);
-void icl_display_core_init(struct drm_i915_private *dev_priv, bool resume);
-void icl_display_core_uninit(struct drm_i915_private *dev_priv);
 void intel_power_domains_enable(struct drm_i915_private *dev_priv);
 void intel_power_domains_disable(struct drm_i915_private *dev_priv);
 void intel_power_domains_suspend(struct drm_i915_private *dev_priv,
 				 enum i915_drm_suspend_mode);
 void intel_power_domains_resume(struct drm_i915_private *dev_priv);
-void hsw_enable_pc8(struct drm_i915_private *dev_priv);
-void hsw_disable_pc8(struct drm_i915_private *dev_priv);
-void bxt_display_core_init(struct drm_i915_private *dev_priv, bool resume);
-void bxt_display_core_uninit(struct drm_i915_private *dev_priv);
+
+void intel_display_power_suspend_late(struct drm_i915_private *i915);
+void intel_display_power_resume_early(struct drm_i915_private *i915);
+void intel_display_power_suspend(struct drm_i915_private *i915);
+void intel_display_power_resume(struct drm_i915_private *i915);
 
 const char *
 intel_display_power_domain_str(struct drm_i915_private *i915,
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 7c209743e478..ced61fc4bc3d 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -2166,7 +2166,7 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct pci_dev *pdev = dev_priv->drm.pdev;
 	struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
-	int ret;
+	int ret = 0;
 
 	disable_rpm_wakeref_asserts(rpm);
 
@@ -2177,12 +2177,9 @@ static int i915_drm_suspend_late(struct drm_device *dev, bool hibernation)
 	intel_power_domains_suspend(dev_priv,
 				    get_suspend_mode(dev_priv, hibernation));
 
-	ret = 0;
-	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv))
-		bxt_enable_dc9(dev_priv);
-	else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		hsw_enable_pc8(dev_priv);
-	else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
+	intel_display_power_suspend_late(dev_priv);
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 		ret = vlv_suspend_complete(dev_priv);
 
 	if (ret) {
@@ -2372,12 +2369,7 @@ static int i915_drm_resume_early(struct drm_device *dev)
 
 	intel_gt_check_and_clear_faults(&dev_priv->gt);
 
-	if (INTEL_GEN(dev_priv) >= 11 || IS_GEN9_LP(dev_priv)) {
-		gen9_sanitize_dc_state(dev_priv);
-		bxt_disable_dc9(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		hsw_disable_pc8(dev_priv);
-	}
+	intel_display_power_resume_early(dev_priv);
 
 	intel_sanitize_gt_powersave(dev_priv);
 
@@ -2921,7 +2913,7 @@ static int intel_runtime_suspend(struct device *kdev)
 	struct drm_device *dev = pci_get_drvdata(pdev);
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
-	int ret;
+	int ret = 0;
 
 	if (WARN_ON_ONCE(!(dev_priv->gt_pm.rc6.enabled && HAS_RC6(dev_priv))))
 		return -ENODEV;
@@ -2945,16 +2937,9 @@ static int intel_runtime_suspend(struct device *kdev)
 
 	intel_uncore_suspend(&dev_priv->uncore);
 
-	ret = 0;
-	if (INTEL_GEN(dev_priv) >= 11) {
-		icl_display_core_uninit(dev_priv);
-		bxt_enable_dc9(dev_priv);
-	} else if (IS_GEN9_LP(dev_priv)) {
-		bxt_display_core_uninit(dev_priv);
-		bxt_enable_dc9(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		hsw_enable_pc8(dev_priv);
-	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+	intel_display_power_suspend(dev_priv);
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
 		ret = vlv_suspend_complete(dev_priv);
 	}
 
@@ -3035,26 +3020,9 @@ static int intel_runtime_resume(struct device *kdev)
 	if (intel_uncore_unclaimed_mmio(&dev_priv->uncore))
 		DRM_DEBUG_DRIVER("Unclaimed access during suspend, bios?\n");
 
-	if (INTEL_GEN(dev_priv) >= 11) {
-		bxt_disable_dc9(dev_priv);
-		icl_display_core_init(dev_priv, true);
-		if (dev_priv->csr.dmc_payload) {
-			if (dev_priv->csr.allowed_dc_mask &
-			    DC_STATE_EN_UPTO_DC6)
-				skl_enable_dc6(dev_priv);
-			else if (dev_priv->csr.allowed_dc_mask &
-				 DC_STATE_EN_UPTO_DC5)
-				gen9_enable_dc5(dev_priv);
-		}
-	} else if (IS_GEN9_LP(dev_priv)) {
-		bxt_disable_dc9(dev_priv);
-		bxt_display_core_init(dev_priv, true);
-		if (dev_priv->csr.dmc_payload &&
-		    (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC5))
-			gen9_enable_dc5(dev_priv);
-	} else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
-		hsw_disable_pc8(dev_priv);
-	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
+	intel_display_power_resume(dev_priv);
+
+	if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
 		ret = vlv_resume_prepare(dev_priv, true);
 	}
 
