Messages in this thread Patch in this message | | | From | Vincent Knecht <> | Subject | [PATCH v1 1/4] ASoC: codecs: tfa989x: Add switch to allow disabling amplifier | Date | Sun, 24 Oct 2021 10:58:37 +0200 |
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From: Stephan Gerhold <stephan@gerhold.net>
In some configurations it may be necessary to explicitly disable the amplifier with an ALSA mixer. An example for this is a stereo setup with two TFA989X. If only one of them should be used (e.g. to use it as an earpiece) the other one must be explicitly disabled.
Add a virtual "Amp Switch" to implement that. There is no register for this (SND_SOC_NOPM) so it only prevents DAPM from activating the amplifier. Also it is inverted (= enabled by default) for compatibility with devices that do not need this functionality.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org> --- sound/soc/codecs/tfa989x.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/tfa989x.c b/sound/soc/codecs/tfa989x.c index 643b45188b6f..1ae47d4f1ca7 100644 --- a/sound/soc/codecs/tfa989x.c +++ b/sound/soc/codecs/tfa989x.c @@ -77,13 +77,16 @@ static const struct regmap_config tfa989x_regmap = { static const char * const chsa_text[] = { "Left", "Right", /* "DSP" */ }; static SOC_ENUM_SINGLE_DECL(chsa_enum, TFA989X_I2SREG, TFA989X_I2SREG_CHSA, chsa_text); -static const struct snd_kcontrol_new chsa_mux = SOC_DAPM_ENUM("Amp Input", chsa_enum); +static const struct snd_kcontrol_new + chsa_mux = SOC_DAPM_ENUM("Amp Input", chsa_enum), + amp_switch = SOC_DAPM_SINGLE("Switch", SND_SOC_NOPM, 0, 1, 1); static const struct snd_soc_dapm_widget tfa989x_dapm_widgets[] = { SND_SOC_DAPM_OUTPUT("OUT"), SND_SOC_DAPM_SUPPLY("POWER", TFA989X_SYS_CTRL, TFA989X_SYS_CTRL_PWDN, 1, NULL, 0), SND_SOC_DAPM_OUT_DRV("AMPE", TFA989X_SYS_CTRL, TFA989X_SYS_CTRL_AMPE, 0, NULL, 0), + SND_SOC_DAPM_SWITCH("Amp", SND_SOC_NOPM, 0, 0, &_switch), SND_SOC_DAPM_MUX("Amp Input", SND_SOC_NOPM, 0, 0, &chsa_mux), SND_SOC_DAPM_AIF_IN("AIFINL", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_AIF_IN("AIFINR", "HiFi Playback", 1, SND_SOC_NOPM, 0, 0), @@ -92,7 +95,8 @@ static const struct snd_soc_dapm_widget tfa989x_dapm_widgets[] = { static const struct snd_soc_dapm_route tfa989x_dapm_routes[] = { {"OUT", NULL, "AMPE"}, {"AMPE", NULL, "POWER"}, - {"AMPE", NULL, "Amp Input"}, + {"AMPE", NULL, "Amp"}, + {"Amp", "Switch", "Amp Input"}, {"Amp Input", "Left", "AIFINL"}, {"Amp Input", "Right", "AIFINR"}, }; -- 2.31.1
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