From eec611d26f84800852a9badbeafa76db3cdc9118 Mon Sep 17 00:00:00 2001 From: Srinivas Kandagatla Date: Thu, 27 Mar 2025 10:06:32 +0000 Subject: [PATCH] ASoC: codecs: wcd938x: add mux control support for hp audio mux On some platforms to minimise pop and click during switching between CTIA and OMTP headset an additional HiFi mux is used. Most common case is that this switch is switched on by default, but on some platforms this needs a regulator enable. move to using mux control to enable both regulator and handle gpios, deprecate the usage of gpio. Signed-off-by: Srinivas Kandagatla Tested-by: Christopher Obbard Tested-by: Johan Hovold Reviewed-by: Dmitry Baryshkov Link: https://patch.msgid.link/20250327100633.11530-6-srinivas.kandagatla@linaro.org Signed-off-by: Mark Brown --- sound/soc/codecs/Kconfig | 1 + sound/soc/codecs/wcd938x.c | 55 ++++++++++++++++++++++++++++++-------- 2 files changed, 45 insertions(+), 11 deletions(-) diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 40bb7a1d44bc..870eb90116f1 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -2239,6 +2239,7 @@ config SND_SOC_WCD938X tristate depends on SOUNDWIRE || !SOUNDWIRE select SND_SOC_WCD_CLASSH + select MULTIPLEXER config SND_SOC_WCD938X_SDW tristate "WCD9380/WCD9385 Codec - SDW" diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c index d03ed9cfa530..585a92772c2a 100644 --- a/sound/soc/codecs/wcd938x.c +++ b/sound/soc/codecs/wcd938x.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include "wcd-clsh-v2.h" @@ -173,6 +174,8 @@ struct wcd938x_priv { int variant; int reset_gpio; struct gpio_desc *us_euro_gpio; + struct mux_control *us_euro_mux; + unsigned int mux_state; u32 micb1_mv; u32 micb2_mv; u32 micb3_mv; @@ -183,6 +186,7 @@ struct wcd938x_priv { bool comp1_enable; bool comp2_enable; bool ldoh; + bool mux_setup_done; }; static const SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(ear_pa_gain, 600, -1800); @@ -3232,15 +3236,26 @@ static void wcd938x_dt_parse_micbias_info(struct device *dev, struct wcd938x_pri static bool wcd938x_swap_gnd_mic(struct snd_soc_component *component) { - int value; - - struct wcd938x_priv *wcd938x; + struct wcd938x_priv *wcd938x = snd_soc_component_get_drvdata(component); + struct device *dev = component->dev; + int ret; - wcd938x = snd_soc_component_get_drvdata(component); + if (wcd938x->us_euro_mux) { + if (wcd938x->mux_setup_done) + mux_control_deselect(wcd938x->us_euro_mux); - value = gpiod_get_value(wcd938x->us_euro_gpio); + ret = mux_control_try_select(wcd938x->us_euro_mux, !wcd938x->mux_state); + if (ret) { + dev_err(dev, "Error (%d) Unable to select us/euro mux state\n", ret); + wcd938x->mux_setup_done = false; + return false; + } + wcd938x->mux_setup_done = true; + } else { + gpiod_set_value(wcd938x->us_euro_gpio, !wcd938x->mux_state); + } - gpiod_set_value(wcd938x->us_euro_gpio, !value); + wcd938x->mux_state = !wcd938x->mux_state; return true; } @@ -3256,11 +3271,26 @@ static int wcd938x_populate_dt_data(struct wcd938x_priv *wcd938x, struct device return dev_err_probe(dev, wcd938x->reset_gpio, "Failed to get reset gpio\n"); - wcd938x->us_euro_gpio = devm_gpiod_get_optional(dev, "us-euro", - GPIOD_OUT_LOW); - if (IS_ERR(wcd938x->us_euro_gpio)) - return dev_err_probe(dev, PTR_ERR(wcd938x->us_euro_gpio), - "us-euro swap Control GPIO not found\n"); + wcd938x->us_euro_mux = devm_mux_control_get(dev, NULL); + if (IS_ERR(wcd938x->us_euro_mux)) { + if (PTR_ERR(wcd938x->us_euro_mux) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + /* mux is optional and now fallback to using gpio */ + wcd938x->us_euro_mux = NULL; + wcd938x->us_euro_gpio = devm_gpiod_get_optional(dev, "us-euro", GPIOD_OUT_LOW); + if (IS_ERR(wcd938x->us_euro_gpio)) + return dev_err_probe(dev, PTR_ERR(wcd938x->us_euro_gpio), + "us-euro swap Control GPIO not found\n"); + } else { + ret = mux_control_try_select(wcd938x->us_euro_mux, wcd938x->mux_state); + if (ret) { + dev_err(dev, "Error (%d) Unable to select us/euro mux state\n", ret); + wcd938x->mux_setup_done = false; + return ret; + } + wcd938x->mux_setup_done = true; + } cfg->swap_gnd_mic = wcd938x_swap_gnd_mic; @@ -3576,6 +3606,9 @@ static void wcd938x_remove(struct platform_device *pdev) pm_runtime_set_suspended(dev); pm_runtime_dont_use_autosuspend(dev); + if (wcd938x->us_euro_mux && wcd938x->mux_setup_done) + mux_control_deselect(wcd938x->us_euro_mux); + regulator_bulk_disable(WCD938X_MAX_SUPPLY, wcd938x->supplies); regulator_bulk_free(WCD938X_MAX_SUPPLY, wcd938x->supplies); } -- 2.50.1