drm/arm/malidp: plane: use drm managed resources

Use drm managed resource allocation (drmm_universal_plane_alloc()) in
order to get rid of the explicit destroy hook in struct drm_plane_funcs.
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221026155934.125294-5-dakr@redhat.com

drivers/gpu/drm/arm/malidp_planes.c

@@ -68,14 +68,6 @@
 /* readahead for partial-frame prefetch */
 #define MALIDP_MMU_PREFETCH_READAHEAD		8
 
-static void malidp_de_plane_destroy(struct drm_plane *plane)
-{
-	struct malidp_plane *mp = to_malidp_plane(plane);
-
-	drm_plane_cleanup(plane);
-	kfree(mp);
-}
-
 /*
  * Replicate what the default ->reset hook does: free the state pointer and
  * allocate a new empty object. We just need enough space to store
@@ -260,7 +252,6 @@ static bool malidp_format_mod_supported_per_plane(struct drm_plane *plane,
 static const struct drm_plane_funcs malidp_de_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
-	.destroy = malidp_de_plane_destroy,
 	.reset = malidp_plane_reset,
 	.atomic_duplicate_state = malidp_duplicate_plane_state,
 	.atomic_destroy_state = malidp_destroy_plane_state,
@@ -972,12 +963,6 @@ int malidp_de_planes_init(struct drm_device *drm)
 	for (i = 0; i < map->n_layers; i++) {
 		u8 id = map->layers[i].id;
 
-		plane = kzalloc(sizeof(*plane), GFP_KERNEL);
-		if (!plane) {
-			ret = -ENOMEM;
-			goto cleanup;
-		}
-
 		/* build the list of DRM supported formats based on the map */
 		for (n = 0, j = 0;  j < map->n_pixel_formats; j++) {
 			if ((map->pixel_formats[j].layer & id) == id)
@@ -990,13 +975,14 @@ int malidp_de_planes_init(struct drm_device *drm)
 		/*
 		 * All the layers except smart layer supports AFBC modifiers.
 		 */
-		ret = drm_universal_plane_init(drm, &plane->base, crtcs,
-				&malidp_de_plane_funcs, formats, n,
-				(id == DE_SMART) ? linear_only_modifiers : modifiers,
-				plane_type, NULL);
-
-		if (ret < 0)
+		plane = drmm_universal_plane_alloc(drm, struct malidp_plane, base,
+						   crtcs, &malidp_de_plane_funcs, formats, n,
+						   (id == DE_SMART) ? linear_only_modifiers :
+						   modifiers, plane_type, NULL);
+		if (IS_ERR(plane)) {
+			ret = PTR_ERR(plane);
 			goto cleanup;
+		}
 
 		drm_plane_helper_add(&plane->base,
 				     &malidp_de_plane_helper_funcs);