drm/vc4: Initialize vc4_drm_driver with CMA helper defaults

The function vc4_prime_import_sg_table() is an otherwise empty wrapper
around CMA's drm_gem_cma_prime_import_sg_table(). Removing it in favor
of the latter allows to initialize vc4_drm_driver with CMA's initializer
macro.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210114084949.29014-1-tzimmermann@suse.de

drivers/gpu/drm/vc4/vc4_bo.c

@@ -738,20 +738,6 @@ static const struct drm_gem_object_funcs vc4_gem_object_funcs = {
 	.vm_ops = &vc4_vm_ops,
 };
 
-struct drm_gem_object *
-vc4_prime_import_sg_table(struct drm_device *dev,
-			  struct dma_buf_attachment *attach,
-			  struct sg_table *sgt)
-{
-	struct drm_gem_object *obj;
-
-	obj = drm_gem_cma_prime_import_sg_table(dev, attach, sgt);
-	if (IS_ERR(obj))
-		return obj;
-
-	return obj;
-}
-
 static int vc4_grab_bin_bo(struct vc4_dev *vc4, struct vc4_file *vc4file)
 {
 	int ret;

drivers/gpu/drm/vc4/vc4_drv.c

@@ -180,12 +180,7 @@ static struct drm_driver vc4_drm_driver = {
 
 	.gem_create_object = vc4_create_object,
 
-	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
-	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
-	.gem_prime_import_sg_table = vc4_prime_import_sg_table,
-	.gem_prime_mmap = drm_gem_prime_mmap,
-
-	.dumb_create = vc4_dumb_create,
+	DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_dumb_create),
 
 	.ioctls = vc4_drm_ioctls,
 	.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),

drivers/gpu/drm/vc4/vc4_drv.h

@@ -801,9 +801,6 @@ int vc4_get_hang_state_ioctl(struct drm_device *dev, void *data,
 			     struct drm_file *file_priv);
 int vc4_label_bo_ioctl(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv);
-struct drm_gem_object *vc4_prime_import_sg_table(struct drm_device *dev,
-						 struct dma_buf_attachment *attach,
-						 struct sg_table *sgt);
 int vc4_bo_cache_init(struct drm_device *dev);
 int vc4_bo_inc_usecnt(struct vc4_bo *bo);
 void vc4_bo_dec_usecnt(struct vc4_bo *bo);