[alsa-devel] [PATCH] ALSA: hda - Fix pop noise in headphones on S3 for Asus X55A, X55V

[Takashi Iwai]

At Thu,  9 Aug 2012 10:56:12 +0200,
David Henningsson wrote:
> 
> To turn off pin control for the pin was tested, and helped against
> this issue.
> 
> BugLink: https://bugs.launchpad.net/bugs/1034779
> Tested-by: Chih-Hsyuan Ho <chih.ho at canonical.com>
> Signed-off-by: David Henningsson <david.henningsson at canonical.com>

Thanks, applied.


Takashi

> ---
>  sound/pci/hda/patch_via.c |    8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> Alsa-info at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1034779/+attachment/3254105/+files/asus-x55a-alsa-info.log
> 
> diff --git a/sound/pci/hda/patch_via.c b/sound/pci/hda/patch_via.c
> index 80d90cb..c9484fe 100644
> --- a/sound/pci/hda/patch_via.c
> +++ b/sound/pci/hda/patch_via.c
> @@ -1752,6 +1752,14 @@ static int via_suspend(struct hda_codec *codec)
>  {
>  	struct via_spec *spec = codec->spec;
>  	vt1708_stop_hp_work(spec);
> +
> +	if (spec->codec_type == VT1802) {
> +		/* Fix pop noise on headphones */
> +		int i;
> +		for (i = 0; i < spec->autocfg.hp_outs; i++)
> +			snd_hda_set_pin_ctl(codec, spec->autocfg.hp_pins[i], 0);
> +	}
> +
>  	return 0;
>  }
>  #endif
> -- 
> 1.7.9.5
>