drm/cma-helper: Add DRM_GEM_CMA_DRIVER_OPS to set default GEM CMA functions

The macro to DRM_GEM_CMA_DRIVER_OPS sets GEM callbacks in struct drm_driver
to their defaults for CMA. A variant of the macro is provided for drivers
that override the default .dumb_create callback. Adapt drivers to the changes.

v4:
	* remove parenthesis around dumb_create_func
	* fix grammar in commit message
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200605073247.4057-4-tzimmermann@suse.de

include/drm/drm_gem_cma_helper.h

@@ -109,6 +109,42 @@ void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 struct drm_gem_object *
 drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);
 
+/**
+ * DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE - CMA GEM driver operations
+ * @dumb_create_func: callback function for .dumb_create
+ *
+ * This macro provides a shortcut for setting the default GEM operations in the
+ * &drm_driver structure.
+ *
+ * This macro is a variant of DRM_GEM_CMA_DRIVER_OPS for drivers that
+ * override the default implementation of &struct rm_driver.dumb_create. Use
+ * DRM_GEM_CMA_DRIVER_OPS if possible. Drivers that require a virtual address
+ * on imported buffers should use
+ * DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE() instead.
+ */
+#define DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(dumb_create_func) \
+	.gem_create_object	= drm_gem_cma_create_object_default_funcs, \
+	.dumb_create		= (dumb_create_func), \
+	.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 = drm_gem_cma_prime_import_sg_table, \
+	.gem_prime_mmap		= drm_gem_cma_prime_mmap
+
+/**
+ * DRM_GEM_CMA_DRIVER_OPS - CMA GEM driver operations
+ *
+ * This macro provides a shortcut for setting the default GEM operations in the
+ * &drm_driver structure.
+ *
+ * Drivers that come with their own implementation of
+ * &struct drm_driver.dumb_create should use
+ * DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE() instead. Use
+ * DRM_GEM_CMA_DRIVER_OPS if possible. Drivers that require a virtual address
+ * on imported buffers should use DRM_GEM_CMA_DRIVER_OPS_VMAP instead.
+ */
+#define DRM_GEM_CMA_DRIVER_OPS \
+	DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(drm_gem_cma_dumb_create)
+
 /**
  * DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE - CMA GEM driver operations
  *                                                ensuring a virtual address
@@ -120,12 +156,14 @@ drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);
  * imported buffers.
  *
  * This macro is a variant of DRM_GEM_CMA_DRIVER_OPS_VMAP for drivers that
- * override the default implementation of &struct rm_driver.dumb_create. Use
- * DRM_GEM_CMA_DRIVER_OPS_VMAP if possible.
+ * override the default implementation of &struct drm_driver.dumb_create. Use
+ * DRM_GEM_CMA_DRIVER_OPS_VMAP if possible. Drivers that do not require a
+ * virtual address on imported buffers should use
+ * DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE() instead.
  */
 #define DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE(dumb_create_func) \
 	.gem_create_object	= drm_gem_cma_create_object_default_funcs, \
-	.dumb_create		= (dumb_create_func), \
+	.dumb_create		= dumb_create_func, \
 	.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 = drm_gem_cma_prime_import_sg_table_vmap, \
@@ -142,7 +180,9 @@ drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);
  * Drivers that come with their own implementation of
  * &struct drm_driver.dumb_create should use
  * DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE() instead. Use
- * DRM_GEM_CMA_DRIVER_OPS_VMAP if possible.
+ * DRM_GEM_CMA_DRIVER_OPS_VMAP if possible. Drivers that do not require a
+ * virtual address on imported buffers should use DRM_GEM_CMA_DRIVER_OPS
+ * instead.
  */
 #define DRM_GEM_CMA_DRIVER_OPS_VMAP \
 	DRM_GEM_CMA_DRIVER_OPS_VMAP_WITH_DUMB_CREATE(drm_gem_cma_dumb_create)