From: Ryan Walklin ryan@testtoast.com
[ Upstream commit a149377c033afe6557c50892ebbfc0e8b7e2e253 ]
Add support for GPIO headphone detection with the hp-det-gpios property. In order for this to properly disable the path upon removal of headphones, the output must be labelled Headphone which is a common sink in the driver.
Describe a headphone jack and detection GPIO in the driver, check for a corresponding device tree node, and enable jack detection in a new machine init function if described.
Signed-off-by: Chris Morgan macromorgan@hotmail.com Signed-off-by: Ryan Walklin ryan@testtoast.com
-- Changelog v1..v2: - Separate DAPM changes into separate patch and add rationale.
Tested-by: Philippe Simons simons.philippe@gmail.com Link: https://patch.msgid.link/20250214220247.10810-4-ryan@testtoast.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/sunxi/sun4i-codec.c | 53 +++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+)
diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c index 886b3fa537d26..06e85b34fdf68 100644 --- a/sound/soc/sunxi/sun4i-codec.c +++ b/sound/soc/sunxi/sun4i-codec.c @@ -22,6 +22,7 @@ #include <linux/gpio/consumer.h>
#include <sound/core.h> +#include <sound/jack.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/soc.h> @@ -331,6 +332,7 @@ struct sun4i_codec { struct clk *clk_module; struct reset_control *rst; struct gpio_desc *gpio_pa; + struct gpio_desc *gpio_hp;
/* ADC_FIFOC register is at different offset on different SoCs */ struct regmap_field *reg_adc_fifoc; @@ -1583,6 +1585,49 @@ static struct snd_soc_dai_driver dummy_cpu_dai = { .ops = &dummy_dai_ops, };
+static struct snd_soc_jack sun4i_headphone_jack; + +static struct snd_soc_jack_pin sun4i_headphone_jack_pins[] = { + { .pin = "Headphone", .mask = SND_JACK_HEADPHONE }, +}; + +static struct snd_soc_jack_gpio sun4i_headphone_jack_gpio = { + .name = "hp-det", + .report = SND_JACK_HEADPHONE, + .debounce_time = 150, +}; + +static int sun4i_codec_machine_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_card *card = rtd->card; + struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card); + int ret; + + if (scodec->gpio_hp) { + ret = snd_soc_card_jack_new_pins(card, "Headphone Jack", + SND_JACK_HEADPHONE, + &sun4i_headphone_jack, + sun4i_headphone_jack_pins, + ARRAY_SIZE(sun4i_headphone_jack_pins)); + if (ret) { + dev_err(rtd->dev, + "Headphone jack creation failed: %d\n", ret); + return ret; + } + + sun4i_headphone_jack_gpio.desc = scodec->gpio_hp; + ret = snd_soc_jack_add_gpios(&sun4i_headphone_jack, 1, + &sun4i_headphone_jack_gpio); + + if (ret) { + dev_err(rtd->dev, "Headphone GPIO not added: %d\n", ret); + return ret; + } + } + + return 0; +} + static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev, int *num_links) { @@ -1608,6 +1653,7 @@ static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev, link->codecs->name = dev_name(dev); link->platforms->name = dev_name(dev); link->dai_fmt = SND_SOC_DAIFMT_I2S; + link->init = sun4i_codec_machine_init;
*num_links = 1;
@@ -2301,6 +2347,13 @@ static int sun4i_codec_probe(struct platform_device *pdev) return ret; }
+ scodec->gpio_hp = devm_gpiod_get_optional(&pdev->dev, "hp-det", GPIOD_IN); + if (IS_ERR(scodec->gpio_hp)) { + ret = PTR_ERR(scodec->gpio_hp); + dev_err_probe(&pdev->dev, ret, "Failed to get hp-det gpio\n"); + return ret; + } + /* reg_field setup */ scodec->reg_adc_fifoc = devm_regmap_field_alloc(&pdev->dev, scodec->regmap,