226 static u16 y_old[MAX_CONTACTS + 1] = {0};  variable
622 		y_old[id] = y;  in filter_point()
625 	y_err = y > y_old[id] ? (y - y_old[id]) : (y_old[id] - y);  in filter_point()
648 	y_new = y > y_old[id] ? (y_old[id] + filter_step_y)  in filter_point()
649 				: (y_old[id] - filter_step_y);  in filter_point()
651 	y_old[id] = y_new;  in filter_point()
663 		y_old[id] = y;  in record_point()
666 	y = (y_old[id] + y) / 2;  in record_point()
671 	if (y > y_old[id])  in record_point()
672 		y_err = y - y_old[id];  in record_point()
674 		y_err = y_old[id] - y;  in record_point()
679 		y_old[id] = y;  in record_point()
689 			y_old[id] = y;  in record_point()
691 			y_new = y_old[id];  in record_point()
696 		y_new = y_old[id];  in record_point()