linux-kernel - Re: [PATCH 1/2] ALSA: hda/realtek: Fix headset mic on Acer Nitro 5

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Message-ID: <CALiyAo=5aLbYEyRWWw7QscTk6cXy5qckHToiPL6h4fKM9=skLg@mail.gmail.com>
Date: Mon, 18 Nov 2024 01:54:45 +0530
From: Hridesh MG <hridesh699@...il.com>
To: Takashi Iwai <tiwai@...e.de>
Cc: Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, Jonathan Corbet <corbet@....net>, 
	Stefan Binding <sbinding@...nsource.cirrus.com>, Kailang Yang <kailang@...ltek.com>, 
	Simon Trimmer <simont@...nsource.cirrus.com>, Joshua Grisham <josh@...huagrisham.com>, 
	Richard Fitzgerald <rf@...nsource.cirrus.com>, linux-sound@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH 1/2] ALSA: hda/realtek: Fix headset mic on Acer Nitro 5

> > +     [ALC_287_FIXUP_ACER_NITRO_HEADSET_MIC_VERBS] = {
> > +             .type = HDA_FIXUP_VERBS,
> > +             .v.verbs = (const struct hda_verb[]) {
> > +                     { 0x20, AC_VERB_SET_COEF_INDEX, 0x45 },
> > +                     { 0x20, AC_VERB_SET_PROC_COEF, 0xD689 },
>
> This is a generic setup for the headset input in CTIA mode.
> Do you really need this explicity?  Usually it's set up at
> alc_headset_mode_ctia() when the iPhone type is connected.
Yeah, the mic wont pick up input without it. I did have a feeling that
it's supposed to be set up automatically rather than being set as a
verb but I couldn't figure out which part of the code I'm supposed to
modify to make that happen. I've tried running it with dynamic
debugging turned on but I don't see the output of codec_dbg from
alc_headset_mode_ctia() :(

> >  static const struct snd2_pci_quirk alc269_fixup_tbl[] = {
> > @@ -10201,6 +10220,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
> >       SND_PCI_QUIRK(0x1025, 0x1466, "Acer Aspire A515-56", ALC255_FIXUP_ACER_HEADPHONE_AND_MIC),
> >       SND_PCI_QUIRK(0x1025, 0x1534, "Acer Predator PH315-54", ALC255_FIXUP_ACER_MIC_NO_PRESENCE),
> >       SND_PCI_QUIRK(0x1025, 0x169a, "Acer Swift SFG16", ALC256_FIXUP_ACER_SFG16_MICMUTE_LED),
> > +     SND_PCI_QUIRK(0x1025, 0x159c, "Acer Nitro 5 AN515-58", ALC_287_FIXUP_ACER_NITRO_HEADSET_MIC_PIN),
>
> The table is sorted in PCI SSID order.  Please put at the right
> place.
Will do, thanks.

> > +     {.id = ALC_287_FIXUP_ACER_NITRO_HEADSET_MIC_PIN, .name = "alc287-fixup-acer-nitro-headset-mic"},
>
> Nowadays the less need for a new model name string.  You can specify
> the model with an alias of SSID if any other device needs to apply the
> same quirk, too.  So, unless it's mandatory, better to drop.
I added the model name string to make debugging easier for users. When
troubleshooting this issue, I followed many guides that recommended
the 'Codec-Specific Models' document, but no entry existed for the
ALC287. I thought that adding a model name would help users quickly
identify and apply the correct quirk without needing kernel expertise.
However, if this goes against the current standards, I’m happy to
adjust.