linux-kernel - Re: [PATCH] ASoC: qcom: lpass-cpu: Fix pop noise during audio capture begin

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Message-ID: <20210514153014.GB6516@sirena.org.uk>
Date:   Fri, 14 May 2021 16:30:14 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
Cc:     agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        robh+dt@...nel.org, plai@...eaurora.org, bgoswami@...eaurora.org,
        perex@...ex.cz, tiwai@...e.com, srinivas.kandagatla@...aro.org,
        rohitkr@...eaurora.org, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, swboyd@...omium.org,
        judyhsiao@...omium.org
Subject: Re: [PATCH] ASoC: qcom: lpass-cpu: Fix pop noise during audio
 capture begin

On Fri, May 14, 2021 at 12:20:46PM +0530, Srinivasa Rao Mandadapu wrote:
> On 5/13/2021 7:01 PM, Mark Brown wrote:

> > This commit doesn't remove the matching update in triger() so we'd have
> > two redundant updates.  I guess it's unlikely to be harmful but it looks
> > wrong/confusing.

> Yes, It's not harmful, as clk_prepare_enable is enabling clock only once but
> maintaining count.

> As Some times in Suspend/resume Sequence not hitting startup/shutdown, but
> Trigger, so for maintaining

> consistency not removed in trigger.

This at least needs some commenting so that it's clear, it looks buggy
at the minute.

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