s2m_rgb_lut_get_closest_duration
ret = s2m_rgb_lut_get_closest_duration(lut_ramp_up, lut_ramp_up_len, time_hi / 3);
ret = s2m_rgb_lut_get_closest_duration(lut_ramp_dn, lut_ramp_dn_len, time_hi / 3);
ret = s2m_rgb_lut_get_closest_duration(lut_stay_hi, lut_stay_hi_len, time_hi);
ret = s2m_rgb_lut_get_closest_duration(lut_stay_lo, lut_stay_lo_len, time_lo);