MT6357_ZCD_CON1
regmap_read(priv->regmap, MT6357_ZCD_CON1, &lgain);
regmap_update_bits(priv->regmap, MT6357_ZCD_CON1,
regmap_update_bits(priv->regmap, MT6357_ZCD_CON1,
volume_ramp(priv, lfrom, lto, rfrom, rto, MT6357_ZCD_CON1);
MT6357_ZCD_CON1, MT6357_AUD_LOL_GAIN_SFT,