linux-kernel - Re: [PATCH 4.19 15/39] ALSA: hda/generic: Add option to enforce preferred

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Date:   Fri, 11 Dec 2020 23:38:22 +0100
From:   Pavel Machek <pavel@...x.de>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Pavel Machek <pavel@...x.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH 4.19 15/39] ALSA: hda/generic: Add option to enforce
 preferred_dacs pairs

Hi!

> > > From: Takashi Iwai <tiwai@...e.de>
> > > 
> > > commit 242d990c158d5b1dabd166516e21992baef5f26a upstream.
> > > 
> > > The generic parser accepts the preferred_dacs[] pairs as a hint for
> > > assigning a DAC to each pin, but this hint doesn't work always
> > > effectively.  Currently it's merely a secondary choice after the trial
> > > with the path index failed.  This made sometimes it difficult to
> > > assign DACs without mimicking the connection list and/or the badness
> > > table.
> > > 
> > > This patch adds a new flag, obey_preferred_dacs, that changes the
> > > behavior of the parser.  As its name stands, the parser obeys the
> > 
> > Option added is never used as variable is never set. We don't need
> > this in 4.19.
> 
> Right, it seems that the succeeding fix is queued only for 5.4 and
> 5.9.
> 
> OTOH, this change will help if another quirk is added in near future,
> and it's pretty safe to apply, so I think it's worth to keep it.

I agree that this is safe to apply and makes sense if we get another
quirk soon. OTOH it is trivial to backport if it is needed.

Best regards,

								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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