From dde4064a4913319cf9b19e745af3417a35f0f738 Mon Sep 17 00:00:00 2001 From: Binbin Zhou Date: Fri, 26 Jun 2026 10:27:48 +0800 Subject: [PATCH] ASoC: loongson: Add headphone jack detection and DAPM routing Extend the Loongson audio machine driver with jack detection, DAPM widgets support, enabling proper switching between headphones and speakers on the Loongson-2K0300 ATK-DL2K0300B board. Signed-off-by: Binbin Zhou Link: https://patch.msgid.link/c4b1503220b6fb433ecdcb881556827579041c3d.1782439646.git.zhoubinbin@loongson.cn Signed-off-by: Mark Brown --- sound/soc/loongson/loongson_card.c | 131 ++++++++++++++++++++++++++++- 1 file changed, 127 insertions(+), 4 deletions(-) diff --git a/sound/soc/loongson/loongson_card.c b/sound/soc/loongson/loongson_card.c index 0e63cbcad57a..25cd12eab4b1 100644 --- a/sound/soc/loongson/loongson_card.c +++ b/sound/soc/loongson/loongson_card.c @@ -7,33 +7,126 @@ // Binbin Zhou // +#include +#include #include +#include +#include +#include #include #include -#include -#include -#include static char codec_name[SND_ACPI_I2C_ID_LEN]; struct loongson_card_data { struct snd_soc_card snd_card; unsigned int mclk_fs; + struct gpio_desc *gpiod_hp_det; + struct gpio_desc *gpiod_hp_ctl; + struct gpio_desc *gpiod_spkr_en; const struct loongson_card_config *cfg; }; struct loongson_card_config { unsigned int fmt; + bool add_hp_jack; + bool add_dapm_widgets; + bool add_dapm_routes; }; static const struct loongson_card_config ls2k1000_card_config = { .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_IB_NF | SND_SOC_DAIFMT_CBC_CFC, + .add_hp_jack = false, + .add_dapm_widgets = false, + .add_dapm_routes = false, }; static const struct loongson_card_config ls2k0300_forever_pi_card_config = { .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBC_CFC, + .add_hp_jack = false, + .add_dapm_widgets = false, + .add_dapm_routes = false, }; +static const struct loongson_card_config ls2k0300_dl2k0300b_card_config = { + .fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBC_CFC, + .add_hp_jack = true, + .add_dapm_widgets = true, + .add_dapm_routes = true, +}; + +static int tegra_machine_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *k, int event) +{ + struct snd_soc_card *card = snd_soc_dapm_to_card(w->dapm); + struct loongson_card_data *priv = snd_soc_card_get_drvdata(card); + + if (!snd_soc_dapm_widget_name_cmp(w, "Speaker")) + gpiod_set_value_cansleep(priv->gpiod_spkr_en, + SND_SOC_DAPM_EVENT_ON(event)); + + if (!snd_soc_dapm_widget_name_cmp(w, "Headphone")) + gpiod_set_value_cansleep(priv->gpiod_hp_ctl, + SND_SOC_DAPM_EVENT_ON(event)); + + return 0; +} + +static const struct snd_soc_dapm_widget loongson_aosc_dapm_widgets[] = { + SND_SOC_DAPM_HP("Headphone", tegra_machine_event), + SND_SOC_DAPM_SPK("Speaker", tegra_machine_event), +}; + +/* Headphones Jack */ + +static struct snd_soc_jack loongson_asoc_hp_jack; + +static struct snd_soc_jack_pin loongson_asoc_hp_jack_pins[] = { + { + .pin = "Headphone", + .mask = SND_JACK_HEADPHONE + }, + { + .pin = "Speaker", + .mask = SND_JACK_HEADPHONE, + .invert = 1 + }, +}; + +static struct snd_soc_jack_gpio loongson_asoc_hp_jack_gpio = { + .name = "Headphones detection", + .report = SND_JACK_HEADPHONE, + .debounce_time = 150, +}; + +static int loongson_asoc_machine_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct loongson_card_data *ls_priv = snd_soc_card_get_drvdata(card); + int ret = 0; + + if (!ls_priv->cfg->add_hp_jack || !ls_priv->gpiod_hp_det) + return 0; + + ret = snd_soc_card_jack_new_pins(card, "Headphones Jack", + SND_JACK_HEADPHONE, + &loongson_asoc_hp_jack, + loongson_asoc_hp_jack_pins, + ARRAY_SIZE(loongson_asoc_hp_jack_pins)); + if (ret) { + dev_err(rtd->dev, "Headphones Jack creation failed: %d\n", ret); + return ret; + } + + loongson_asoc_hp_jack_gpio.desc = ls_priv->gpiod_hp_det; + + ret = snd_soc_jack_add_gpios(&loongson_asoc_hp_jack, 1, &loongson_asoc_hp_jack_gpio); + if (ret) + dev_err(rtd->dev, "Headphone GPIO not added: %d\n", ret); + + return ret; +} + static int loongson_card_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { @@ -75,6 +168,7 @@ static struct snd_soc_dai_link loongson_dai_links[] = { { .name = "Loongson Audio Port", .stream_name = "Loongson Audio", + .init = loongson_asoc_machine_init, SND_SOC_DAILINK_REG(analog), .ops = &loongson_ops, }, @@ -135,16 +229,35 @@ static int loongson_card_parse_acpi(struct loongson_card_data *data) static int loongson_card_parse_of(struct loongson_card_data *data) { - struct device_node *cpu, *codec; struct snd_soc_card *card = &data->snd_card; + struct device_node *cpu, *codec; struct device *dev = card->dev; int ret, i; + data->gpiod_hp_det = devm_gpiod_get_optional(dev, "hp-det", GPIOD_IN); + if (IS_ERR(data->gpiod_hp_det)) + return PTR_ERR(data->gpiod_hp_det); + + data->gpiod_hp_ctl = devm_gpiod_get_optional(dev, "hp-ctl", GPIOD_OUT_LOW); + if (IS_ERR(data->gpiod_hp_ctl)) + return PTR_ERR(data->gpiod_hp_ctl); + + data->gpiod_spkr_en = devm_gpiod_get_optional(dev, "spkr-en", GPIOD_OUT_LOW); + if (IS_ERR(data->gpiod_spkr_en)) + return PTR_ERR(data->gpiod_spkr_en); + + if (data->cfg->add_dapm_routes) { + ret = snd_soc_of_parse_audio_routing(card, "audio-routing"); + if (ret) + return ret; + } + cpu = of_get_child_by_name(dev->of_node, "cpu"); if (!cpu) { dev_err(dev, "platform property missing or invalid\n"); return -EINVAL; } + codec = of_get_child_by_name(dev->of_node, "codec"); if (!codec) { dev_err(dev, "audio-codec property missing or invalid\n"); @@ -199,6 +312,12 @@ static int loongson_asoc_card_probe(struct platform_device *pdev) card->owner = THIS_MODULE; card->dai_link = loongson_dai_links; card->num_links = ARRAY_SIZE(loongson_dai_links); + + if (ls_priv->cfg->add_dapm_widgets) { + card->dapm_widgets = loongson_aosc_dapm_widgets; + card->num_dapm_widgets = ARRAY_SIZE(loongson_aosc_dapm_widgets); + } + snd_soc_card_set_drvdata(card, ls_priv); ret = device_property_read_string(dev, "model", &card->name); @@ -227,6 +346,10 @@ static const struct of_device_id loongson_asoc_dt_ids[] = { .compatible = "loongson,ls2k0300-forever-pi-audio-card", .data = &ls2k0300_forever_pi_card_config }, + { + .compatible = "loongson,ls2k0300-dl2k0300b-audio-card", + .data = &ls2k0300_dl2k0300b_card_config + }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, loongson_asoc_dt_ids);