APPLIED[H]: [PATCH 0/1][SRU][OEM-5.10/H/U] ALSA: hda/cirrus: Set Initial DMIC volume for Bullseye to -26 dB

[Stefan Bader]

On 27.04.21 07:59, You-Sheng Yang wrote:
> BugLink: https://bugs.launchpad.net/bugs/1923557
> 
> [Impact]
> 
> On some platforms with Cirrus CS8409 audio codec, DMIC volume default
> value in kernel driver is 0, which follows no audio sound will be played
> during installation and OOBE until being explicitly configured again via
> GNOME Settings GUI or other methods.
> 
> [Fix]
> 
> Commit 0e853a9c3937 ("ALSA: hda/cirrus: Set Initial DMIC volume for
> Bullseye to -26 dB") currently landed in upstream tiwai/sound.git is
> required this address this issue. It's also being proposed to v5.13
> merge window.
> 
> [Test Case]
> 
> Try to remove all the user space settings caches and reboot. The
> detailed steps are:
> 
>    $ sudo systemctl disable alsa-restore.service
>    $ sudo rm /var/lib/alsa/asound.state
>    $ sudo reboot
>    $ amixer sget 'Internal Mic',0
>    Simple mixer control 'Internal Mic',0
>      Capabilities: cvolume cswitch
>      Capture channels: Front Left - Front Right
>      Limits: Capture 0 - 63
>      Front Left: Capture 0 [0%] [-51.00dB] [off]
>      Front Right: Capture 0 [0%] [-51.00dB] [off]
> 
> Expect 40% in the front left/right capture volumes.
> 
> [Where problems could occur]
> 
> This gives the default value of Cirrus CS8409 audio codec capture volume
> on Bullseye only. Cannot come out with any side effect it may produce so
> far.
> 
> [Other Info]
> 
> By SRU we skipped a couple of refactoring changes in asound upstream
> tree, so additional changes to the original patch are required to
> backport.
> 
> Stefan Binding (1):
>    UBUNTU: SAUCE: ALSA: hda/cirrus: Set Initial DMIC volume for Bullseye
>      to -26 dB
> 
>   sound/pci/hda/patch_cirrus.c | 5 +++++
>   1 file changed, 5 insertions(+)
> 
Applied to hirsute:linux/master-next. Thanks.

-Stefan


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