snd_soc_dapm_set_bias_level
ret = snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
ret = snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_PREPARE);
ret = snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_STANDBY);
ret = snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_OFF);
ret = snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_ON);
snd_soc_dapm_set_bias_level(dapm,
snd_soc_dapm_set_bias_level(dapm,
snd_soc_dapm_set_bias_level(dapm, SND_SOC_BIAS_OFF);
snd_soc_dapm_set_bias_level(card_dapm, SND_SOC_BIAS_OFF);