linux-kernel - Re: [PATCH] ALSA: hda/realtek: Fix quirk for TongFang PHxTxX1

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Date:   Thu, 02 Dec 2021 16:39:13 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Werner Sembach <wse@...edocomputers.com>
Cc:     perex@...ex.cz, tiwai@...e.com, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: hda/realtek: Fix quirk for TongFang PHxTxX1

On Thu, 02 Dec 2021 16:35:23 +0100,
Werner Sembach wrote:
> 
> Am 02.12.21 um 16:28 schrieb Werner Sembach:
> > This fixes the SND_PCI_QUIRK(...) of the TongFang PHxTxX1 barebone. This
> > fixes the issue of sound not working after s3 suspend.
> >
> > When waking up from s3 suspend the Coef 0x10 is set to 0x0220 instead of
> > 0x0020. Setting the value manually makes the sound work again. This patch
> > does this automatically.
> An educational question: Is there any, at least partial, documentation available on what these Coef values actually do
> besides https://www.kernel.org/doc/html/v5.15/sound/hd-audio/realtek-pc-beep.html ?

Unfortunately, no.  It's a completely vendor-specific black magic.


Takashi