linux-kernel - Re: [RFC PATCH 0/2] ASoC: soc-dai: add flag to mute and unmute stream during trigger.

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Date:   Fri, 27 Oct 2023 13:52:11 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     broonie@...nel.org, perex@...ex.cz, tiwai@...e.com,
        lgirdwood@...il.com, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org
Subject: Re: [RFC PATCH 0/2] ASoC: soc-dai: add flag to mute and unmute
 stream during trigger.

On Fri, Oct 27, 2023 at 11:57:45AM +0100, Srinivas Kandagatla wrote:
> Click/Pop Noise was a long pending issue with WSA Codecs which are prone
> to accumlate DC when ports are active but without any data streams.
> There are multiple places in the current setup, where this could happen
> in both startup as well as shutdown path.
> 
> This patchset adds a new flag mute_unmute_on_trigger to dai_ops to let
> generic code do the mute/unmute on trigger.
> 
> This patches help fix those issues by making sure the PA is Muted/Unmuted
> inline with the stream start/stop events.
>
> Srinivas Kandagatla (2):
>   ASoC: soc-dai: add flag to mute and unmute stream during trigger
>   ASoC: codecs: wsa883x: make use of new mute_unmute_on_trigger flag

I've verified that this fixes the pop sounds when starting and stopping
a stream on the X13s, even if the click sound when killing pulseaudio
(e.g. on reboot) is still there (as with the previous fixes).

Tested-by: Johan Hovold <johan+linaro@...nel.org>

If these are accepted, can we get them backported to 6.5 as well?

Johan