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This numbered inputs would work, but might be not user friendly in some case, for example in case of system hardware design has some clear labels. Adds new "state-labels" property and enable to select MUX by own state names. Original > amixer set "MUX" "Input 1" Use mux-names sound_mux: mux { compatible = "simple-audio-mux"; mux-gpios = <...>; state-labels = "Label_A", "Label_B"; }; > amixer set "MUX" "Label_A" Signed-off-by: Kuninori Morimoto --- sound/soc/codecs/simple-mux.c | 55 +++++++++++++++++++++++++---------- 1 file changed, 40 insertions(+), 15 deletions(-) diff --git a/sound/soc/codecs/simple-mux.c b/sound/soc/codecs/simple-mux.c index bf67de12d20b..240af0563283 100644 --- a/sound/soc/codecs/simple-mux.c +++ b/sound/soc/codecs/simple-mux.c @@ -9,12 +9,21 @@ #include #include +#define MUX_TEXT_SIZE 2 +#define MUX_WIDGET_SIZE 4 +#define MUX_ROUTE_SIZE 3 struct simple_mux { struct gpio_desc *gpiod_mux; unsigned int mux; + const char *mux_texts[MUX_TEXT_SIZE]; + struct soc_enum mux_enum; + struct snd_kcontrol_new mux_mux; + struct snd_soc_dapm_widget mux_widgets[MUX_WIDGET_SIZE]; + struct snd_soc_dapm_route mux_routes[MUX_ROUTE_SIZE]; + struct snd_soc_component_driver mux_driver; }; -static const char * const simple_mux_texts[] = { +static const char * const simple_mux_texts[MUX_TEXT_SIZE] = { "Input 1", "Input 2" }; @@ -66,30 +75,23 @@ static unsigned int simple_mux_read(struct snd_soc_component *component, static const struct snd_kcontrol_new simple_mux_mux = SOC_DAPM_ENUM_EXT("Muxer", simple_mux_enum, simple_mux_control_get, simple_mux_control_put); -static const struct snd_soc_dapm_widget simple_mux_dapm_widgets[] = { +static const struct snd_soc_dapm_widget simple_mux_dapm_widgets[MUX_WIDGET_SIZE] = { SND_SOC_DAPM_INPUT("IN1"), SND_SOC_DAPM_INPUT("IN2"), - SND_SOC_DAPM_MUX("MUX", SND_SOC_NOPM, 0, 0, &simple_mux_mux), + SND_SOC_DAPM_MUX("MUX", SND_SOC_NOPM, 0, 0, &simple_mux_mux), // see simple_mux_probe() SND_SOC_DAPM_OUTPUT("OUT"), }; -static const struct snd_soc_dapm_route simple_mux_dapm_routes[] = { +static const struct snd_soc_dapm_route simple_mux_dapm_routes[MUX_ROUTE_SIZE] = { { "OUT", NULL, "MUX" }, - { "MUX", "Input 1", "IN1" }, - { "MUX", "Input 2", "IN2" }, -}; - -static const struct snd_soc_component_driver simple_mux_component_driver = { - .dapm_widgets = simple_mux_dapm_widgets, - .num_dapm_widgets = ARRAY_SIZE(simple_mux_dapm_widgets), - .dapm_routes = simple_mux_dapm_routes, - .num_dapm_routes = ARRAY_SIZE(simple_mux_dapm_routes), - .read = simple_mux_read, + { "MUX", "Input 1", "IN1" }, // see simple_mux_probe() + { "MUX", "Input 2", "IN2" }, // see simple_mux_probe() }; static int simple_mux_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; struct simple_mux *priv; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); @@ -103,7 +105,30 @@ static int simple_mux_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(priv->gpiod_mux), "Failed to get 'mux' gpio"); - return devm_snd_soc_register_component(dev, &simple_mux_component_driver, NULL, 0); + /* Copy default settings */ + memcpy(&priv->mux_texts, &simple_mux_texts, sizeof(priv->mux_texts)); + memcpy(&priv->mux_enum, &simple_mux_enum, sizeof(priv->mux_enum)); + memcpy(&priv->mux_mux, &simple_mux_mux, sizeof(priv->mux_mux)); + memcpy(&priv->mux_widgets, &simple_mux_dapm_widgets, sizeof(priv->mux_widgets)); + memcpy(&priv->mux_routes, &simple_mux_dapm_routes, sizeof(priv->mux_routes)); + + priv->mux_driver.dapm_widgets = priv->mux_widgets; + priv->mux_driver.num_dapm_widgets = MUX_WIDGET_SIZE; + priv->mux_driver.dapm_routes = priv->mux_routes; + priv->mux_driver.num_dapm_routes = MUX_ROUTE_SIZE; + priv->mux_driver.read = simple_mux_read; + + /* Overwrite text ("Input 1", "Input 2") if property exists */ + of_property_read_string_array(np, "state-labels", priv->mux_texts, MUX_TEXT_SIZE); + + /* switch to use priv data instead of default */ + priv->mux_enum.texts = priv->mux_texts; + priv->mux_mux.private_value = (unsigned long)&priv->mux_enum; + priv->mux_widgets[2].kcontrol_news = &priv->mux_mux; + priv->mux_routes[1].control = priv->mux_texts[0]; // "Input 1" + priv->mux_routes[2].control = priv->mux_texts[1]; // "Input 2" + + return devm_snd_soc_register_component(dev, &priv->mux_driver, NULL, 0); } #ifdef CONFIG_OF