[alsa-devel] [PATCH] ALSA: hda - Mute headphone pin on suspend on XPS13 9333

[Takashi Iwai]

At Sun, 19 Apr 2015 19:00:40 +0200,
Gabriele Mazzotta wrote:
> 
> Muting the headphone output pin right before the codec suspension
> prevents pop noises when headphones are plugged in (except for a
> barely audible click noise).
> This solution allows to truly save some power when headphones are
> plugged in unlike the previous solution (033b0a7ca9c:
> "ALSA: hda - Pop noises fix for XPS13 9333")

Great.  But this doesn't fix the issue (noise at the first headphone
plug), right?

In anyway, I applied the patch now.  Thanks.


Takashi

> 
> Signed-off-by: Gabriele Mazzotta <gabriele.mzt at gmail.com>
> ---
>  sound/pci/hda/patch_realtek.c | 17 +++++++----------
>  1 file changed, 7 insertions(+), 10 deletions(-)
> 
> diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
> index b18b9c6..231d0e4 100644
> --- a/sound/pci/hda/patch_realtek.c
> +++ b/sound/pci/hda/patch_realtek.c
> @@ -4176,17 +4176,15 @@ static void alc_fixup_disable_aamix(struct hda_codec *codec,
>  	}
>  }
>  
> -static unsigned int alc_power_filter_xps13(struct hda_codec *codec,
> -				hda_nid_t nid,
> -				unsigned int power_state)
> +static void alc_shutup_dell_xps13(struct hda_codec *codec)
>  {
>  	struct alc_spec *spec = codec->spec;
> +	int hp_pin = spec->gen.autocfg.hp_pins[0];
>  
> -	/* Avoid pop noises when headphones are plugged in */
> -	if (spec->gen.hp_jack_present)
> -		if (nid == codec->core.afg || nid == 0x02 || nid == 0x15)
> -			return AC_PWRST_D0;
> -	return snd_hda_gen_path_power_filter(codec, nid, power_state);
> +	/* Prevent pop noises when headphones are plugged in */
> +	snd_hda_codec_write(codec, hp_pin, 0,
> +			    AC_VERB_SET_AMP_GAIN_MUTE, AMP_OUT_MUTE);
> +	msleep(20);
>  }
>  
>  static void alc_fixup_dell_xps13(struct hda_codec *codec,
> @@ -4197,8 +4195,7 @@ static void alc_fixup_dell_xps13(struct hda_codec *codec,
>  		struct hda_input_mux *imux = &spec->gen.input_mux;
>  		int i;
>  
> -		spec->shutup = alc_no_shutup;
> -		codec->power_filter = alc_power_filter_xps13;
> +		spec->shutup = alc_shutup_dell_xps13;
>  
>  		/* Make the internal mic the default input source. */
>  		for (i = 0; i < imux->num_items; i++) {
> -- 
> 2.1.4
>