Re: [PATCH] ALSA: hda/realtek: Enable rear line-out pins on MSI EC79 (ALCS1200A)

[Takashi Iwai]

On Tue, 17 Mar 2026 09:57:39 +0100,
James wrote:
> 
> 
> Hello,
> alsa-info output attached (--no-upload). Note: this was captured after
> applying a userspace workaround that
> forces pin-ctls=0x40 (PIN_OUT) on NID 0x14. Let me know if you'd prefer a
> capture from a clean boot state.

Yes, please give the clean state, too.


thanks,

Takashi

> Thanks,
> Signed-off-by: James Waschbisch <james@xxxxxxxxxx>
> 
> On Mon, Mar 16, 2026, at 12:08 PM, Takashi Iwai wrote:
> 
>     On Sun, 15 Mar 2026 11:19:50 +0100,
>     James Waschbisch wrote:
>     > 
>     > On MSI systems with subsystem ID 1462:ec79 using the Realtek ALCS1200A
>     > codec, the rear line-out pins (0x14, 0x15, 0x16) are parsed as line
>     > outputs but do not come up with active pin widget control after boot.
>     > This leaves analog output on the rear jacks unavailable until userspace
>     > manually reprograms the codec.
>     > 
>     > Add a board-specific fixup that disables line-out/speaker automute and
>     > forces pins 0x14, 0x15, and 0x16 to PIN_OUT during HDA_FIXUP_ACT_INIT,
>     > while also clearing the output amp mute on those nodes.
>     > 
>     > Tested-on: MSI X570 Gaming Pro WiFi (1462:ec79, ALCS1200A)
>     > 
>     > Signed-off-by: James Waschbisch <james@xxxxxxxxxx>
>    
>     When this kind of changes like the manual amp updates or pin control
>     fiddling are needed, usually something else is missing.
>     Could you give alsa-info.sh output for further investigation?
>     Run the script with --no-upload option and attach the output.
> 
>     thanks,
>    
>     Takashi
>    
>     > ---
>     >  sound/hda/codecs/realtek/alc882.c | 38 +++++++++++++++++++++++++++++++
>     >  1 file changed, 38 insertions(+)
>     > 
>     > diff --git a/sound/hda/codecs/realtek/alc882.c b/sound/hda/codecs/
>     realtek/alc882.c
>     > index 529fecd5b..2bf266a25 100644
>     > --- a/sound/hda/codecs/realtek/alc882.c
>     > +++ b/sound/hda/codecs/realtek/alc882.c
>     > @@ -60,6 +60,7 @@ enum {
>     >  ALC887_FIXUP_ASUS_AUDIO,
>     >  ALC887_FIXUP_ASUS_HMIC,
>     >  ALCS1200A_FIXUP_MIC_VREF,
>     > + ALCS1200A_FIXUP_MSI_EC79,
>     >  ALC888VD_FIXUP_MIC_100VREF,
>     >  };
>     >  
>     > @@ -261,6 +262,36 @@ static void alc887_fixup_asus_jack(struct hda_codec
>     *codec,
>     >  spec->gen.hp_automute_hook = alc887_asus_hp_automute_hook;
>     >  }
>     >  
>     > +static void alcs1200a_fixup_msi_ec79(struct hda_codec *codec,
>     > +      const struct hda_fixup *fix, int action)
>     > +{
>     > + struct alc_spec *spec = codec->spec;
>     > +
>     > + if (action == HDA_FIXUP_ACT_PRE_PROBE) {
>     > + spec->gen.automute_lo = 0;
>     > + spec->gen.automute_speaker = 0;
>     > + return;
>     > + }
>     > +
>     > + if (action != HDA_FIXUP_ACT_INIT)
>     > + return;
>     > +
>     > + /* Front / Surround / CLFE line-out pins */
>     > + snd_hda_set_pin_ctl(codec, 0x14, PIN_OUT);
>     > + snd_hda_set_pin_ctl(codec, 0x15, PIN_OUT);
>     > + snd_hda_set_pin_ctl(codec, 0x16, PIN_OUT);
>     > +
>     > + /* Unmute both output amp channels on all three pins */
>     > + snd_hda_codec_amp_update(codec, 0x14, 0, HDA_OUTPUT, 0, 0x80, 0);
>     > + snd_hda_codec_amp_update(codec, 0x14, 1, HDA_OUTPUT, 0, 0x80, 0);
>     > +
>     > + snd_hda_codec_amp_update(codec, 0x15, 0, HDA_OUTPUT, 0, 0x80, 0);
>     > + snd_hda_codec_amp_update(codec, 0x15, 1, HDA_OUTPUT, 0, 0x80, 0);
>     > +
>     > + snd_hda_codec_amp_update(codec, 0x16, 0, HDA_OUTPUT, 0, 0x80, 0);
>     > + snd_hda_codec_amp_update(codec, 0x16, 1, HDA_OUTPUT, 0, 0x80, 0);
>     > +}
>     > +
>     >  static const struct hda_fixup alc882_fixups[] = {
>     >  [ALC882_FIXUP_ABIT_AW9D_MAX] = {
>     >  .type = HDA_FIXUP_PINS,
>     > @@ -553,6 +584,12 @@ static const struct hda_fixup alc882_fixups[] = {
>     >  {}
>     >  }
>     >  },
>     > + [ALCS1200A_FIXUP_MSI_EC79] = {
>     > + .type = HDA_FIXUP_FUNC,
>     > + .v.func = alcs1200a_fixup_msi_ec79,
>     > + .chained = true,
>     > + .chain_id = ALCS1200A_FIXUP_MIC_VREF,
>     > + },
>     >  [ALC888VD_FIXUP_MIC_100VREF] = {
>     >  .type = HDA_FIXUP_PINCTLS,
>     >  .v.pins = (const struct hda_pintbl[]) {
>     > @@ -636,6 +673,7 @@ static const struct hda_quirk alc882_fixup_tbl[] = {
>     >  SND_PCI_QUIRK(0x1458, 0xa0cd, "Gigabyte X570 Aorus Master",
>     ALC1220_FIXUP_GB_X570),
>     >  SND_PCI_QUIRK(0x1458, 0xa0ce, "Gigabyte X570 Aorus Xtreme",
>     ALC1220_FIXUP_GB_X570),
>     >  SND_PCI_QUIRK(0x1458, 0xa0d5, "Gigabyte X570S Aorus Master",
>     ALC1220_FIXUP_GB_X570),
>     > + SND_PCI_QUIRK(0x1462, 0xec79, "MSI ALCS1200A",
>     ALCS1200A_FIXUP_MSI_EC79),
>     >  SND_PCI_QUIRK(0x1462, 0x11f7, "MSI-GE63", ALC1220_FIXUP_CLEVO_P950),
>     >  SND_PCI_QUIRK(0x1462, 0x1228, "MSI-GP63", ALC1220_FIXUP_CLEVO_P950),
>     >  SND_PCI_QUIRK(0x1462, 0x1229, "MSI-GP73", ALC1220_FIXUP_CLEVO_P950),
>     > -- 
>     > 2.53.0
>     >
> 
>