[PATCH] ALSA: hda/realtek: Serialize setting GPIO LED

[Takashi Iwai]

On Wed, 01 Jul 2020 07:21:35 +0200,
Kai-Heng Feng wrote:
> 
> If a system has two GPIO controlled LED, one for mute and another one
> for micmute, and both of them are on before system suspend, sometimes
> one of them won't be turned off by system suspend.
> 
> The codec doesn't seem to be able to control multiple GPIO LEDs at the
> same time, so introduce a new mutex to serialize setting the LED, to
> prevent the issue from happening.
> 
> Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
> ---
>  include/sound/hda_codec.h     | 1 +
>  sound/pci/hda/hda_codec.c     | 1 +
>  sound/pci/hda/patch_realtek.c | 3 +++
>  3 files changed, 5 insertions(+)
> 
> diff --git a/include/sound/hda_codec.h b/include/sound/hda_codec.h
> index d16a4229209b..3a1792bbb7ac 100644
> --- a/include/sound/hda_codec.h
> +++ b/include/sound/hda_codec.h
> @@ -206,6 +206,7 @@ struct hda_codec {
>  
>  	struct mutex spdif_mutex;
>  	struct mutex control_mutex;
> +	struct mutex led_mutex;

Since it's only for Realtek codec, can it be better in alc_spec
instead?


thanks,

Takashi