drm/vc4: Update a bunch of code to match upstream submission.

This gets almost everything matching, except for the MSAA support and
using generic PM domains.

Signed-off-by: Eric Anholt <eric@anholt.net>

drivers/gpu/drm/drm_gem_cma_helper.c

@@ -58,15 +58,14 @@ __drm_gem_cma_create(struct drm_device *drm, size_t size)
 	struct drm_gem_cma_object *cma_obj;
 	struct drm_gem_object *gem_obj;
 	int ret;
-	size_t obj_size = (drm->driver->gem_obj_size ?
-			   drm->driver->gem_obj_size :
-			   sizeof(*cma_obj));
 
-	cma_obj = kzalloc(obj_size, GFP_KERNEL);
-	if (!cma_obj)
+	if (drm->driver->gem_create_object)
+		gem_obj = drm->driver->gem_create_object(drm, size);
+	else
+		gem_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);
+	if (!gem_obj)
 		return ERR_PTR(-ENOMEM);
-
-	gem_obj = &cma_obj->base;
+	cma_obj = container_of(gem_obj, struct drm_gem_cma_object, base);
 
 	ret = drm_gem_object_init(drm, gem_obj, size);
 	if (ret)