Re: [PATCH] ALSA: hda/realtek - Fix headset mic problem for a HP machine with alc671

On Thu, 10 Mar 2022 14:03:01 +0100, huangwenhui wrote:

On a HP 288 Pro G8, the front Mic could not be detected.

Signed-off-by: huangwenhui huangwenhuia@uniontech.com

Thanks for the patch. Most of the changes look OK, but one thing I still don't get:

• case HDA_FIXUP_ACT_INIT:

• alc_write_coef_idx(codec, 0x19, 0xa054);
  

• msleep(80);
  

• snd_hda_codec_write(codec, hp_pin, 0,
  

• 	    AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_UNMUTE);
  

Why this unconditional unmute is required for fixing the mic problem?

Takashi