linux-kernel - Re: [PATCH v5 2/2] ASoC: mediatek: mt8186-rt5682: Modify machine driver for two DMICs case

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Date:   Wed, 2 Nov 2022 11:44:13 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Ajye Huang <ajye_huang@...pal.corp-partner.google.com>,
        linux-kernel@...r.kernel.org
Cc:     Mark Brown <broonie@...nel.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>,
        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 v5 2/2] ASoC: mediatek: mt8186-rt5682: Modify machine
 driver for two DMICs case

Il 31/10/22 13:22, Ajye Huang ha scritto:
> Having two DMICs, a front DMIC and a Rear DMIC,
> but only host audio input AUX port0 is used for these two Dmics.
> A "dmic-gpios" property is used for a mixer control to switch
> the dmic signal source between the Front and Rear Dmic.
> 
> Refer to this one as an example,
> commit 3cfbf07c6d27
> ("ASoC: qcom: sc7180: Modify machine driver for 2mic")
> 
> Signed-off-by: Ajye Huang <ajye_huang@...pal.corp-partner.google.com>
> ---
>   .../mt8186/mt8186-mt6366-rt1019-rt5682s.c     | 102 +++++++++++++++++-
>   1 file changed, 101 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c b/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c
> index 2414c5b77233..75351734464c 100644
> --- a/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c
> +++ b/sound/soc/mediatek/mt8186/mt8186-mt6366-rt1019-rt5682s.c
> @@ -7,6 +7,8 @@
>   // Author: Jiaxin Yu <jiaxin.yu@...iatek.com>
>   //
>   
> +#include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
>   #include <linux/input.h>
>   #include <linux/module.h>
>   #include <linux/of_device.h>
> @@ -39,6 +41,8 @@
>   
>   struct mt8186_mt6366_rt1019_rt5682s_priv {
>   	struct snd_soc_jack headset_jack, hdmi_jack;
> +	struct gpio_desc *dmic_sel;
> +	int dmic_switch;
>   };
>   
>   /* Headset jack detection DAPM pins */
> @@ -68,6 +72,94 @@ static struct snd_soc_codec_conf mt8186_mt6366_rt1019_rt5682s_codec_conf[] = {
>   	},
>   };
>   
> +static int dmic_get(struct snd_kcontrol *kcontrol,
> +		    struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
> +	struct mtk_soc_card_data *soc_card_data =
> +		snd_soc_card_get_drvdata(dapm->card);
> +	struct mt8186_mt6366_rt1019_rt5682s_priv *priv = soc_card_data->mach_priv;
> +
> +	ucontrol->value.integer.value[0] = priv->dmic_switch;
> +	return 0;
> +}
> +
> +static int dmic_set(struct snd_kcontrol *kcontrol,
> +		    struct snd_ctl_elem_value *ucontrol)
> +{
> +	struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kcontrol);
> +	struct mtk_soc_card_data *soc_card_data =
> +		snd_soc_card_get_drvdata(dapm->card);
> +	struct mt8186_mt6366_rt1019_rt5682s_priv *priv = soc_card_data->mach_priv;
> +
> +	priv->dmic_switch = ucontrol->value.integer.value[0];
> +	if (priv->dmic_sel) {
> +		gpiod_set_value(priv->dmic_sel, priv->dmic_switch);
> +		dev_info(dapm->card->dev, "dmic_set_value %d\n",
> +			 priv->dmic_switch);
> +	}
> +	return 0;
> +}
> +
> +static const char * const dmic_mux_text[] = {
> +	"FrontMic",
> +	"RearMic",

Why are the two words joined?
s/FrontMic/Front Mic/g
s/RearMic/Rear Mic/g

Like that, we keep it consistent with the naming that was given in the commit
that you mentioned in the commit description.

Regards,
Angelo