linux-kernel - Re: [PATCH 8/8] ASoC: sun50i-codec-analog: Enable DAPM for earpiece switch

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Message-ID: <CAGb2v67wvWEYM4ttKVmgM6Pou+00tuvwb8nMvjR+Y+F-p2cA=g@mail.gmail.com>
Date:   Mon, 17 Feb 2020 15:33:22 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Maxime Ripard <mripard@...nel.org>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Luca Weiss <luca@...tu.xyz>,
        Linux-ALSA <alsa-devel@...a-project.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 8/8] ASoC: sun50i-codec-analog: Enable DAPM for earpiece switch

Hi,

On Mon, Feb 17, 2020 at 10:18 AM Samuel Holland <samuel@...lland.org> wrote:
>
> By including the earpiece mute switch in the DAPM graph, both the
> earpiece amplifier and the Mixer/DAC inputs can be powered off when
> the earpiece is muted.
>
> The mute switch is between the source selection and the amplifier,
> as per the diagram in the SoC manual.
>
> Signed-off-by: Samuel Holland <samuel@...lland.org>
> ---
>  sound/soc/sunxi/sun50i-codec-analog.c | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/sound/soc/sunxi/sun50i-codec-analog.c b/sound/soc/sunxi/sun50i-codec-analog.c
> index 84bb76cad74f..6c89b0716bbd 100644
> --- a/sound/soc/sunxi/sun50i-codec-analog.c
> +++ b/sound/soc/sunxi/sun50i-codec-analog.c
> @@ -232,11 +232,6 @@ static const struct snd_kcontrol_new sun50i_a64_codec_controls[] = {
>                        SUN50I_ADDA_EARPIECE_CTRL1,
>                        SUN50I_ADDA_EARPIECE_CTRL1_ESP_VOL, 0x1f, 0,
>                        sun50i_codec_earpiece_vol_scale),
> -
> -       SOC_SINGLE("Earpiece Playback Switch",
> -                  SUN50I_ADDA_EARPIECE_CTRL1,
> -                  SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_MUTE, 1, 0),
> -
>  };
>
>  static const char * const sun50i_codec_hp_src_enum_text[] = {
> @@ -295,6 +290,11 @@ static const struct snd_kcontrol_new sun50i_codec_earpiece_src[] = {
>                       sun50i_codec_earpiece_src_enum),
>  };
>
> +static const struct snd_kcontrol_new sun50i_codec_earpiece_switch =
> +       SOC_DAPM_SINGLE("Playback Switch",
> +                       SUN50I_ADDA_EARPIECE_CTRL1,
> +                       SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_MUTE, 1, 0);
> +
>  static const struct snd_soc_dapm_widget sun50i_a64_codec_widgets[] = {
>         /* DAC */
>         SND_SOC_DAPM_DAC("Left DAC", NULL, SUN50I_ADDA_MIX_DAC_CTRL,
> @@ -341,6 +341,8 @@ static const struct snd_soc_dapm_widget sun50i_a64_codec_widgets[] = {
>
>         SND_SOC_DAPM_MUX("Earpiece Source Playback Route",
>                          SND_SOC_NOPM, 0, 0, sun50i_codec_earpiece_src),
> +       SND_SOC_DAPM_SWITCH("Earpiece",
> +                           SND_SOC_NOPM, 0, 0, &sun50i_codec_earpiece_switch),

I would suggest naming this something a bit more specific, in case someone
uses "Earpiece" as a widget name at the board level. Also, having the
"Earpiece" come before the "Earpiece Amp" in the route doesn't make much
sense. However, this creates an issue with the name of the created kcontrol...
Any other ideas?

ChenYu


>         SND_SOC_DAPM_OUT_DRV("Earpiece Amp", SUN50I_ADDA_EARPIECE_CTRL1,
>                              SUN50I_ADDA_EARPIECE_CTRL1_ESPPA_EN, 0, NULL, 0),
>         SND_SOC_DAPM_OUTPUT("EARPIECE"),
> @@ -462,7 +464,8 @@ static const struct snd_soc_dapm_route sun50i_a64_codec_routes[] = {
>         { "Earpiece Source Playback Route", "DACR", "Right DAC" },
>         { "Earpiece Source Playback Route", "Left Mixer", "Left Mixer" },
>         { "Earpiece Source Playback Route", "Right Mixer", "Right Mixer" },
> -       { "Earpiece Amp", NULL, "Earpiece Source Playback Route" },
> +       { "Earpiece", "Playback Switch", "Earpiece Source Playback Route" },
> +       { "Earpiece Amp", NULL, "Earpiece" },
>         { "EARPIECE", NULL, "Earpiece Amp" },
>  };
>
> --
> 2.24.1
>