is_valid_dmc_id
if (!is_valid_dmc_id(dmc_id) || !has_dmc_id_fw(display, dmc_id))
if (!is_valid_dmc_id(dmc_id) || !has_dmc_id_fw(display, dmc_id))
if (!is_valid_dmc_id(dmc_id) || !has_dmc_id_fw(display, dmc_id))
if (!is_valid_dmc_id(dmc_id)) {