dist/drm/drm_plane.c

435 	plane->old_fb = plane->fb;
439 		plane->old_fb = NULL;
443 	drm_framebuffer_put(plane->old_fb);
444 	plane->old_fb = NULL;
694 		plane->old_fb = plane->fb;
700 			plane->old_fb = NULL;
711 	plane->old_fb = plane->fb;
720 		plane->old_fb = NULL;
724 	if (plane->old_fb)
725 		drm_framebuffer_put(plane->old_fb);
726 	plane->old_fb = NULL;
1045 	struct drm_framebuffer *fb = NULL, *old_fb;
1127 		old_fb = plane->state->fb;
1129 		old_fb = plane->fb;
1131 	if (old_fb == NULL) {
1161 	if (old_fb->format != fb->format) {
1187 	plane->old_fb = plane->fb;
1200 		plane->old_fb = NULL;
1211 	if (plane->old_fb)
1212 		drm_framebuffer_put(plane->old_fb);
1213 	plane->old_fb = NULL;