drm/virtio: plane: use drm managed resources

Use drm managed resource allocation (drmm_universal_plane_alloc()) in
order to cleanup/simplify drm plane .destroy callback.

Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220714130028.2127858-2-dakr@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
index 7148f38..6a62f32 100644 (file)
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -67,16 +67,10 @@ uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc)
        return format;
 }
 
-static void virtio_gpu_plane_destroy(struct drm_plane *plane)
-{
-       drm_plane_cleanup(plane);
-       kfree(plane);
-}
-
 static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
        .update_plane           = drm_atomic_helper_update_plane,
        .disable_plane          = drm_atomic_helper_disable_plane,
-       .destroy                = virtio_gpu_plane_destroy,
+       .destroy                = drm_plane_cleanup,
        .reset                  = drm_atomic_helper_plane_reset,
        .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
        .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
@@ -379,11 +373,7 @@ struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
        const struct drm_plane_helper_funcs *funcs;
        struct drm_plane *plane;
        const uint32_t *formats;
-       int ret, nformats;
-
-       plane = kzalloc(sizeof(*plane), GFP_KERNEL);
-       if (!plane)
-               return ERR_PTR(-ENOMEM);
+       int nformats;
 
        if (type == DRM_PLANE_TYPE_CURSOR) {
                formats = virtio_gpu_cursor_formats;
@@ -394,17 +384,13 @@ struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
                nformats = ARRAY_SIZE(virtio_gpu_formats);
                funcs = &virtio_gpu_primary_helper_funcs;
        }
-       ret = drm_universal_plane_init(dev, plane, 1 << index,
-                                      &virtio_gpu_plane_funcs,
-                                      formats, nformats,
-                                      NULL, type, NULL);
-       if (ret)
-               goto err_plane_init;
+
+       plane = drmm_universal_plane_alloc(dev, struct drm_plane, dev,
+                                          1 << index, &virtio_gpu_plane_funcs,
+                                          formats, nformats, NULL, type, NULL);
+       if (IS_ERR(plane))
+               return plane;
 
        drm_plane_helper_add(plane, funcs);
        return plane;
-
-err_plane_init:
-       kfree(plane);
-       return ERR_PTR(ret);
 }