drm/atomic: Add new reverse iterator over all plane state (V2)

			      (old_plane_state) = (__state)->planes[__i].old_state,\

			      (new_plane_state) = (__state)->planes[__i].new_state, 1))

/**

 * for_each_oldnew_plane_in_state_reverse - iterate over all planes in an atomic

 * update in reverse order

 * @__state: &struct drm_atomic_state pointer

 * @plane: &struct drm_plane iteration cursor

 * @old_plane_state: &struct drm_plane_state iteration cursor for the old state

 * @new_plane_state: &struct drm_plane_state iteration cursor for the new state

 * @__i: int iteration cursor, for macro-internal use

 *

 * This iterates over all planes in an atomic update in reverse order,

 * tracking both old and  new state. This is useful in places where the

 * state delta needs to be considered, for example in atomic check functions.

 */

#define for_each_oldnew_plane_in_state_reverse(__state, plane, old_plane_state, new_plane_state, __i) \

	for ((__i) = ((__state)->dev->mode_config.num_total_plane - 1);	\

	     (__i) >= 0;						\

	     (__i)--)							\

		for_each_if ((__state)->planes[__i].ptr &&		\

			     ((plane) = (__state)->planes[__i].ptr,	\

			      (old_plane_state) = (__state)->planes[__i].old_state,\

			      (new_plane_state) = (__state)->planes[__i].new_state, 1))

/**

 * for_each_old_plane_in_state - iterate over all planes in an atomic update

 * @__state: &struct drm_atomic_state pointer