drm/udl: Switch to atomic suspend/resume helpers

We can use the generic suspend/resume helpers for atomic modesetting.
Switch udl over.

Signed-off-by: Thomas Zimmermann <[e-mail]>
Reviewed-by: Emil Velikov <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/udl/udl_drv.c

···
 {
 	struct drm_device *dev = usb_get_intfdata(interface);
 
-	drm_kms_helper_poll_disable(dev);
-	return 0;
+	return drm_mode_config_helper_suspend(dev);
 }
 
 static int udl_usb_resume(struct usb_interface *interface)
 {
 	struct drm_device *dev = usb_get_intfdata(interface);
 
-	drm_kms_helper_poll_enable(dev);
-	udl_modeset_restore(dev);
-	return 0;
+	return drm_mode_config_helper_resume(dev);
 }
 
 DEFINE_DRM_GEM_FOPS(udl_driver_fops);

drivers/gpu/drm/udl/udl_drv.h

···
 
 /* modeset */
 int udl_modeset_init(struct drm_device *dev);
-void udl_modeset_restore(struct drm_device *dev);
 void udl_modeset_cleanup(struct drm_device *dev);
 struct drm_connector *udl_connector_init(struct drm_device *dev);
 

drivers/gpu/drm/udl/udl_modeset.c

···
 	return ret;
 }
 
-void udl_modeset_restore(struct drm_device *dev)
-{
-	struct udl_device *udl = dev->dev_private;
-	struct drm_crtc *crtc = &udl->display_pipe.crtc;
-	struct drm_plane *primary = &udl->display_pipe.plane;
-	struct drm_framebuffer *fb = primary->fb;
-
-	if (!fb)
-		return;
-
-	udl_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
-	udl_handle_damage(fb, 0, 0, fb->width, fb->height);
-}
-
 void udl_modeset_cleanup(struct drm_device *dev)
 {
 	drm_mode_config_cleanup(dev);