drm/udl: Remove struct udl_connector

Udl's struct udl_connector is an empty wrapper around struct
drm_connector. Remove it. Allocate the connector as part of struct
udl_device and inline the init function into its only caller.

v2:
- fix return value in udl_modeset_init() (Dan)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240510154841.11370-6-tzimmermann@suse.de

drivers/gpu/drm/udl/udl_drv.h

@@ -49,15 +49,6 @@ struct urb_list {
 	size_t size;
 };
 
-struct udl_connector {
-	struct drm_connector connector;
-};
-
-static inline struct udl_connector *to_udl_connector(struct drm_connector *connector)
-{
-	return container_of(connector, struct udl_connector, connector);
-}
-
 struct udl_device {
 	struct drm_device drm;
 	struct device *dev;
@@ -66,6 +57,7 @@ struct udl_device {
 	struct drm_plane primary_plane;
 	struct drm_crtc crtc;
 	struct drm_encoder encoder;
+	struct drm_connector connector;
 
 	struct mutex gem_lock;
 

drivers/gpu/drm/udl/udl_modeset.c

@@ -444,49 +444,14 @@ static const struct drm_connector_helper_funcs udl_connector_helper_funcs = {
 	.detect_ctx = udl_connector_helper_detect_ctx,
 };
 
-static void udl_connector_destroy(struct drm_connector *connector)
-{
-	struct udl_connector *udl_connector = to_udl_connector(connector);
-
-	drm_connector_cleanup(connector);
-	kfree(udl_connector);
-}
-
 static const struct drm_connector_funcs udl_connector_funcs = {
 	.reset = drm_atomic_helper_connector_reset,
 	.fill_modes = drm_helper_probe_single_connector_modes,
-	.destroy = udl_connector_destroy,
+	.destroy = drm_connector_cleanup,
 	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
-struct drm_connector *udl_connector_init(struct drm_device *dev)
-{
-	struct udl_connector *udl_connector;
-	struct drm_connector *connector;
-	int ret;
-
-	udl_connector = kzalloc(sizeof(*udl_connector), GFP_KERNEL);
-	if (!udl_connector)
-		return ERR_PTR(-ENOMEM);
-
-	connector = &udl_connector->connector;
-	ret = drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_VGA);
-	if (ret)
-		goto err_kfree;
-
-	drm_connector_helper_add(connector, &udl_connector_helper_funcs);
-
-	connector->polled = DRM_CONNECTOR_POLL_CONNECT |
-			    DRM_CONNECTOR_POLL_DISCONNECT;
-
-	return connector;
-
-err_kfree:
-	kfree(udl_connector);
-	return ERR_PTR(ret);
-}
-
 /*
  * Modesetting
  */
@@ -556,9 +521,15 @@ int udl_modeset_init(struct drm_device *dev)
 		return ret;
 	encoder->possible_crtcs = drm_crtc_mask(crtc);
 
-	connector = udl_connector_init(dev);
-	if (IS_ERR(connector))
-		return PTR_ERR(connector);
+	connector = &udl->connector;
+	ret = drm_connector_init(dev, connector, &udl_connector_funcs, DRM_MODE_CONNECTOR_VGA);
+	if (ret)
+		return ret;
+	drm_connector_helper_add(connector, &udl_connector_helper_funcs);
+
+	connector->polled = DRM_CONNECTOR_POLL_CONNECT |
+			    DRM_CONNECTOR_POLL_DISCONNECT;
+
 	ret = drm_connector_attach_encoder(connector, encoder);
 	if (ret)
 		return ret;