229 static u16 y_old[MAX_CONTACTS + 1] = {0};  variable
628 		y_old[id] = y;  in filter_point()
631 	y_err = y > y_old[id] ? (y - y_old[id]) : (y_old[id] - y);  in filter_point()
654 	y_new = y > y_old[id] ? (y_old[id] + filter_step_y)  in filter_point()
655 				: (y_old[id] - filter_step_y);  in filter_point()
657 	y_old[id] = y_new;  in filter_point()
669 		y_old[id] = y;  in record_point()
672 	y = (y_old[id] + y) / 2;  in record_point()
677 	if (y > y_old[id])  in record_point()
678 		y_err = y - y_old[id];  in record_point()
680 		y_err = y_old[id] - y;  in record_point()
685 		y_old[id] = y;  in record_point()
695 			y_old[id] = y;  in record_point()
697 			y_new = y_old[id];  in record_point()
702 		y_new = y_old[id];  in record_point()