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

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Message-ID: <20210513133132.GC5813@sirena.org.uk>
Date:   Thu, 13 May 2021 14:31:32 +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 Thu, May 13, 2021 at 05:15:39PM +0530, Srinivasa Rao Mandadapu wrote:

> +	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
> +		ret = regmap_fields_write(i2sctl->spken, id,
> +						 LPAIF_I2SCTL_SPKEN_ENABLE);
> +	} else  {
> +		ret = regmap_fields_write(i2sctl->micen, id,
> +						 LPAIF_I2SCTL_MICEN_ENABLE);
> +	}

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.

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