linux-kernel - Re: [PATCH 2/2] ALSA: hda/cs8409: Prevent pops and clicks during reboot

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Message-ID: <s5h1r6xlvrs.wl-tiwai@suse.de>
Date:   Fri, 13 Aug 2021 08:10:47 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        <alsa-devel@...a-project.org>, <patches@...nsource.cirrus.com>,
        <linux-kernel@...r.kernel.org>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: Re: [PATCH 2/2] ALSA: hda/cs8409: Prevent pops and clicks during reboot

On Thu, 12 Aug 2021 20:34:33 +0200,
Vitaly Rodionov wrote:
> 
> From: Stefan Binding <sbinding@...nsource.cirrus.com>
> 
> During reboot, when the CS42L42 powers down, pops and clicks
> may occur due to the codec not being shutdown gracefully.
> This can be fixed by going through the suspend sequence,
> which shuts down the codec cleanly inside the reboot_notify
> hook, which is called on reboot.
> 
> Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
> Signed-off-by: Vitaly Rodionov <vitalyr@...nsource.cirrus.com>

I hold this one for now, as there is a fix series that deprecates the
reboot_notify callback of HD-audio by forcibly doing runtime-suspend
at shutdown.  Please check the three patches in
  https://bugzilla.kernel.org/show_bug.cgi?id=214045

I'm going to submit those soon in anyway.


thanks,

Takashi