linux-kernel - Re: [PATCH v1 2/2] ASoC: mediatek: mt8186-rt5682: Modify machine driver for two DMICs case

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Message-ID: <Y1wApOeV7OoQzkt5@sirena.org.uk>
Date:   Fri, 28 Oct 2022 17:17:40 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Ajye Huang <ajye_huang@...pal.corp-partner.google.com>
Cc:     linux-kernel@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-mediatek@...ts.infradead.org,
        "chunxu . li" <chunxu.li@...iatek.com>,
        Takashi Iwai <tiwai@...e.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Jiaxin Yu <jiaxin.yu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Nícolas F . R . A . Prado 
        <nfraprado@...labora.com>, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH v1 2/2] ASoC: mediatek: mt8186-rt5682: Modify machine
 driver for two DMICs case

On Sat, Oct 29, 2022 at 12:07:33AM +0800, Ajye Huang wrote:

> +static const char * const dmic_mux_text[] = {
> +	"FrontMic",
> +	"RearMic",
> +};

> +	ret = snd_soc_dapm_new_controls(&card->dapm, dmic_widgets,
> +					ARRAY_SIZE(dmic_widgets));
> +	if (ret) {
> +		dev_err(card->dev, "DMic widget addition failed: %d\n", ret);
> +		/* Don't need to add routes if widget addition failed */
> +		return ret;
> +	}

> +       if (of_property_read_bool(pdev->dev.of_node, "dmic-gpios")) {
> +               mach_priv->dmic_sel = devm_gpiod_get_optional(&pdev->dev,
> +                                                       "dmic", GPIOD_OUT_LOW);

My prior comments about it being nicer to make the addition of the
control depend on the property being there and the description of the
options configurable do stand (I appreciate that the other driver might
not have done this which was probably an oversight).

Also do we really need the of_property_read_bool() there?  I'd have
expected that devm_gpiod_get_optional() would be handling that for us.

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