diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
index feaa8bc..4e617e0 100644
--- a/drivers/gpu/drm/arm/hdlcd_drv.c
+++ b/drivers/gpu/drm/arm/hdlcd_drv.c
@@ -427,37 +427,15 @@ static int hdlcd_remove(struct platform_device *pdev)
 static int __maybe_unused hdlcd_pm_suspend(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);
-	struct hdlcd_drm_private *hdlcd = drm ? drm->dev_private : NULL;
 
-	if (!hdlcd)
-		return 0;
-
-	drm_kms_helper_poll_disable(drm);
-	drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 1);
-
-	hdlcd->state = drm_atomic_helper_suspend(drm);
-	if (IS_ERR(hdlcd->state)) {
-		drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 0);
-		drm_kms_helper_poll_enable(drm);
-		return PTR_ERR(hdlcd->state);
-	}
-
-	return 0;
+	return drm_mode_config_helper_suspend(drm);
 }
 
 static int __maybe_unused hdlcd_pm_resume(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);
-	struct hdlcd_drm_private *hdlcd = drm ? drm->dev_private : NULL;
-
-	if (!hdlcd)
-		return 0;
 
-	drm_atomic_helper_resume(drm, hdlcd->state);
-	drm_fbdev_cma_set_suspend_unlocked(hdlcd->fbdev, 0);
-	drm_kms_helper_poll_enable(drm);
-
-	return 0;
+	return drm_mode_config_helper_resume(drm);
 }
 
 static SIMPLE_DEV_PM_OPS(hdlcd_pm_ops, hdlcd_pm_suspend, hdlcd_pm_resume);
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index 186d00a..f604a84 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -529,21 +529,3 @@ void drm_fbdev_cma_set_suspend(struct drm_fbdev_cma *fbdev_cma, bool state)
 		drm_fb_helper_set_suspend(&fbdev_cma->fb_helper, state);
 }
 EXPORT_SYMBOL(drm_fbdev_cma_set_suspend);
-
-/**
- * drm_fbdev_cma_set_suspend_unlocked - wrapper around
- *                                      drm_fb_helper_set_suspend_unlocked
- * @fbdev_cma: The drm_fbdev_cma struct, may be NULL
- * @state: desired state, zero to resume, non-zero to suspend
- *
- * Calls drm_fb_helper_set_suspend, which is a wrapper around
- * fb_set_suspend implemented by fbdev core.
- */
-void drm_fbdev_cma_set_suspend_unlocked(struct drm_fbdev_cma *fbdev_cma,
-					bool state)
-{
-	if (fbdev_cma)
-		drm_fb_helper_set_suspend_unlocked(&fbdev_cma->fb_helper,
-						   state);
-}
-EXPORT_SYMBOL(drm_fbdev_cma_set_suspend_unlocked);
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 02aee6c..288220f 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -357,32 +357,15 @@ static void rcar_du_lastclose(struct drm_device *dev)
 static int rcar_du_pm_suspend(struct device *dev)
 {
 	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
-	struct drm_atomic_state *state;
 
-	drm_kms_helper_poll_disable(rcdu->ddev);
-	drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
-
-	state = drm_atomic_helper_suspend(rcdu->ddev);
-	if (IS_ERR(state)) {
-		drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
-		drm_kms_helper_poll_enable(rcdu->ddev);
-		return PTR_ERR(state);
-	}
-
-	rcdu->suspend_state = state;
-
-	return 0;
+	return drm_mode_config_helper_suspend(rcdu->ddev);
 }
 
 static int rcar_du_pm_resume(struct device *dev)
 {
 	struct rcar_du_device *rcdu = dev_get_drvdata(dev);
 
-	drm_atomic_helper_resume(rcdu->ddev, rcdu->suspend_state);
-	drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
-	drm_kms_helper_poll_enable(rcdu->ddev);
-
-	return 0;
+	return drm_mode_config_helper_resume(rcdu->ddev);
 }
 #endif
 
diff --git a/include/drm/drm_fb_cma_helper.h b/include/drm/drm_fb_cma_helper.h
index d532f88a..15c4569 100644
--- a/include/drm/drm_fb_cma_helper.h
+++ b/include/drm/drm_fb_cma_helper.h
@@ -33,8 +33,6 @@ struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
 void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma);
 void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma);
 void drm_fbdev_cma_set_suspend(struct drm_fbdev_cma *fbdev_cma, bool state);
-void drm_fbdev_cma_set_suspend_unlocked(struct drm_fbdev_cma *fbdev_cma,
-					bool state);
 
 struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
 	unsigned int plane);
