Re: [linux-sunxi] [PATCH v3 2/9] ASoC: sun8i-codec-analog: prepare a mixer control/widget/route set for V3s

From: Chen-Yu Tsai
Date: Wed May 24 2017 - 23:56:42 EST

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In reply to: Icenowy Zheng: "[PATCH v3 2/9] ASoC: sun8i-codec-analog: prepare a mixer control/widget/route set for V3s"
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On Wed, May 24, 2017 at 6:06 PM, Icenowy Zheng <icenowy@xxxxxxx> wrote:
> Allwinner V3s has an analog codec without MIC2 and Line In, which will
> need a special set of mixer controls/widgets/routes, otherwise meaningless
> controls will be exported to userspace and confuse the user.
>
> Add the special set, and use it when the SoC has no MIC2 and Line In.
>
> Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
> ---
> New patch in v3.
>
> sound/soc/sunxi/sun8i-codec-analog.c | 97 +++++++++++++++++++++++++++++++++++-
> 1 file changed, 96 insertions(+), 1 deletion(-)
>
> diff --git a/sound/soc/sunxi/sun8i-codec-analog.c b/sound/soc/sunxi/sun8i-codec-analog.c
> index edcc3eb7cd9a..4c34a12b3739 100644
> --- a/sound/soc/sunxi/sun8i-codec-analog.c
> +++ b/sound/soc/sunxi/sun8i-codec-analog.c
> @@ -219,6 +219,22 @@ static const struct snd_kcontrol_new sun8i_codec_mixer_controls[] = {
> SUN8I_ADDA_LOMIXSC_MIC2, 1, 0),
> };
>
> +/* mixer controls */
> +static const struct snd_kcontrol_new sun8i_v3s_codec_mixer_controls[] = {
> + SOC_DAPM_DOUBLE_R("DAC Playback Switch",
> + SUN8I_ADDA_LOMIXSC,
> + SUN8I_ADDA_ROMIXSC,
> + SUN8I_ADDA_LOMIXSC_DACL, 1, 0),
> + SOC_DAPM_DOUBLE_R("DAC Reversed Playback Switch",
> + SUN8I_ADDA_LOMIXSC,
> + SUN8I_ADDA_ROMIXSC,
> + SUN8I_ADDA_LOMIXSC_DACR, 1, 0),
> + SOC_DAPM_DOUBLE_R("Mic1 Playback Switch",
> + SUN8I_ADDA_LOMIXSC,
> + SUN8I_ADDA_ROMIXSC,
> + SUN8I_ADDA_LOMIXSC_MIC1, 1, 0),
> +};
> +
> /* ADC mixer controls */
> static const struct snd_kcontrol_new sun8i_codec_adc_mixer_controls[] = {
> SOC_DAPM_DOUBLE_R("Mixer Capture Switch",
> @@ -243,6 +259,22 @@ static const struct snd_kcontrol_new sun8i_codec_adc_mixer_controls[] = {
> SUN8I_ADDA_LADCMIXSC_MIC2, 1, 0),
> };
>
> +/* ADC mixer controls */
> +static const struct snd_kcontrol_new sun8i_v3s_codec_adc_mixer_controls[] = {
> + SOC_DAPM_DOUBLE_R("Mixer Capture Switch",
> + SUN8I_ADDA_LADCMIXSC,
> + SUN8I_ADDA_RADCMIXSC,
> + SUN8I_ADDA_LADCMIXSC_OMIXRL, 1, 0),
> + SOC_DAPM_DOUBLE_R("Mixer Reversed Capture Switch",
> + SUN8I_ADDA_LADCMIXSC,
> + SUN8I_ADDA_RADCMIXSC,
> + SUN8I_ADDA_LADCMIXSC_OMIXRR, 1, 0),
> + SOC_DAPM_DOUBLE_R("Mic1 Capture Switch",
> + SUN8I_ADDA_LADCMIXSC,
> + SUN8I_ADDA_RADCMIXSC,
> + SUN8I_ADDA_LADCMIXSC_MIC1, 1, 0),
> +};
> +
> /* volume / mute controls */
> static const DECLARE_TLV_DB_SCALE(sun8i_codec_out_mixer_pregain_scale,
> -450, 150, 0);
> @@ -292,8 +324,9 @@ static const struct snd_soc_dapm_widget sun8i_codec_common_widgets[] = {
> /* Mic input path */
> SND_SOC_DAPM_PGA("Mic1 Amplifier", SUN8I_ADDA_MIC1G_MICBIAS_CTRL,
> SUN8I_ADDA_MIC1G_MICBIAS_CTRL_MIC1AMPEN, 0, NULL, 0),
> +};
>
> - /* Mixers */
> +static const struct snd_soc_dapm_widget sun8i_codec_mixer_widgets[] = {
> SND_SOC_DAPM_MIXER("Left Mixer", SUN8I_ADDA_DAC_PA_SRC,
> SUN8I_ADDA_DAC_PA_SRC_LMIXEN, 0,
> sun8i_codec_mixer_controls,
> @@ -312,10 +345,31 @@ static const struct snd_soc_dapm_widget sun8i_codec_common_widgets[] = {
> ARRAY_SIZE(sun8i_codec_adc_mixer_controls)),
> };
>
> +static const struct snd_soc_dapm_widget sun8i_v3s_codec_mixer_widgets[] = {
> + SND_SOC_DAPM_MIXER("Left Mixer", SUN8I_ADDA_DAC_PA_SRC,
> + SUN8I_ADDA_DAC_PA_SRC_LMIXEN, 0,
> + sun8i_v3s_codec_mixer_controls,
> + ARRAY_SIZE(sun8i_v3s_codec_mixer_controls)),
> + SND_SOC_DAPM_MIXER("Right Mixer", SUN8I_ADDA_DAC_PA_SRC,
> + SUN8I_ADDA_DAC_PA_SRC_RMIXEN, 0,
> + sun8i_v3s_codec_mixer_controls,
> + ARRAY_SIZE(sun8i_v3s_codec_mixer_controls)),
> + SND_SOC_DAPM_MIXER("Left ADC Mixer", SUN8I_ADDA_ADC_AP_EN,
> + SUN8I_ADDA_ADC_AP_EN_ADCLEN, 0,
> + sun8i_v3s_codec_adc_mixer_controls,
> + ARRAY_SIZE(sun8i_v3s_codec_adc_mixer_controls)),
> + SND_SOC_DAPM_MIXER("Right ADC Mixer", SUN8I_ADDA_ADC_AP_EN,
> + SUN8I_ADDA_ADC_AP_EN_ADCREN, 0,
> + sun8i_v3s_codec_adc_mixer_controls,
> + ARRAY_SIZE(sun8i_v3s_codec_adc_mixer_controls)),
> +};
> +
> static const struct snd_soc_dapm_route sun8i_codec_common_routes[] = {
> /* Microphone Routes */
> { "Mic1 Amplifier", NULL, "MIC1"},
> +};
>
> +static const struct snd_soc_dapm_route sun8i_codec_mixer_routes[] = {
> /* Left Mixer Routes */
> { "Left Mixer", "DAC Playback Switch", "Left DAC" },
> { "Left Mixer", "DAC Reversed Playback Switch", "Right DAC" },
> @@ -714,6 +768,46 @@ static const struct sun8i_codec_analog_quirks sun8i_h3_quirks = {
> .has_mic2 = true,
> };
>
> +static int sun8i_codec_analog_add_mixer(struct snd_soc_component *cmpnt,
> + const struct sun8i_codec_analog_quirks *quirks)
> +{
> + struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(cmpnt);
> + struct device *dev = cmpnt->dev;
> + int ret;
> +
> + if (!quirks->has_mic2 && !quirks->has_linein) {

Please leave a TODO note saying that not all special cases are handled.

> + /*
> + * Apply the special widget set which has uses a control
> + * without MIC2 and Line In, for SoCs without these (V3s).
> + */
> + ret = snd_soc_dapm_new_controls(dapm,
> + sun8i_v3s_codec_mixer_widgets,
> + ARRAY_SIZE(sun8i_v3s_codec_mixer_widgets));
> + if (ret) {
> + dev_err(dev, "Failed to add V3s Mixer DAPM widgets: %d\n", ret);
> + return ret;
> + }
> + } else {
> + /* Apply the generic mixer widget set. */
> + ret = snd_soc_dapm_new_controls(dapm,
> + sun8i_codec_mixer_widgets,
> + ARRAY_SIZE(sun8i_codec_mixer_widgets));
> + if (ret) {
> + dev_err(dev, "Failed to add Mixer DAPM widgets: %d\n", ret);
> + return ret;
> + }
> + }

I was thinking maybe having separate probe functions saved in the quirks
structure might be better. The quirk-specific probe function would add
the mixer widget, then chain to sun8i_codec_analog_cmpnt_probe to add
the rest. That would make it harder to read though, and doesn't offer
much improvement in terms of code size.

Lets stick with what you have already.

> +
> + ret = snd_soc_dapm_add_routes(dapm, sun8i_codec_mixer_routes,
> + ARRAY_SIZE(sun8i_codec_mixer_routes));
> + if (ret) {
> + dev_err(dev, "Failed to add Mixer DAPM routes: %d\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> static int sun8i_codec_analog_cmpnt_probe(struct snd_soc_component *cmpnt)
> {
> struct device *dev = cmpnt->dev;
> @@ -728,6 +822,7 @@ static int sun8i_codec_analog_cmpnt_probe(struct snd_soc_component *cmpnt)
> quirks = of_device_get_match_data(dev);
>
> /* Add controls, widgets, and routes for individual features */
> + sun8i_codec_analog_add_mixer(cmpnt, quirks);

You should check for errors.

Thanks
ChenYu

>
> if (quirks->has_headphone) {
> ret = sun8i_codec_add_headphone(cmpnt);
> --
> 2.12.2
>
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Next message: Kai-Heng Feng: "[PATCH] pinctrl: amd: don't load pinctrl-amd on Gigabyte AM4 boards"
Previous message: David Miller: "Re: [PATCH] sparc64: Add 16GB hugepage support"
In reply to: Icenowy Zheng: "[PATCH v3 2/9] ASoC: sun8i-codec-analog: prepare a mixer control/widget/route set for V3s"
Next in thread: Icenowy Zheng: "[PATCH v3 3/9] ASoC: sun8i-codec-analog: add support for V3s SoC"
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