AC97_SIGMATEL_BIAS1
snd_ac97_write_cache(ac97, AC97_SIGMATEL_BIAS1, 0xabba);
snd_ac97_write_cache(ac97, AC97_SIGMATEL_BIAS1, 0xabba);
snd_ac97_write_cache(ac97, AC97_SIGMATEL_BIAS1, 0xabba);
snd_ac97_write_cache(ac97, AC97_SIGMATEL_BIAS1, 0xabba);
snd_ac97_write(ac97, AC97_SIGMATEL_BIAS1, 0xabba);
snd_ac97_write(ac97, AC97_SIGMATEL_BIAS1, 0);