From patchwork Sun May 19 08:17:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Artur Weber X-Patchwork-Id: 13667808 Received: from mail-ed1-f44.google.com (mail-ed1-f44.google.com [209.85.208.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D969F1BDC8; Sun, 19 May 2024 08:18:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716106697; cv=none; b=OHXkdHemDRt7RNYMPQuBtlTRv7qPvswuhuEjg+Xg5nVUquyjmpVNT8NmJMsVk2qp5uaZvnUe2DDydSQtdioSufxQen4UXC+EJsBsHDJ/ZWtHLE9MViy6iPT18mjLrw5XP92ZW8+6BUE0HGfOtHUoNK45i2hISr6sf2f9x9VpBJI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716106697; c=relaxed/simple; bh=tvVeHRzJ1CkifWQbFGlvF0EVZIoz7vxKkkPUGFuk7jM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=LULPcWh3+qIEmOx4jbJ38IUGfjpNU/rMRvkzoLSOM+lfyFLxUFhvbeHawOW8AHlYP3cBNK69IPbJAy7zYaAofeRI3xjls5GwU5u27db6tVLx/FJUlJdK4Tr96djOOun1B7dZcKkpD+cyno5zDSKaVJ2Ewp42kTX20Yz2L3YwCkY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=jeRjTQhM; arc=none smtp.client-ip=209.85.208.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jeRjTQhM" Received: by mail-ed1-f44.google.com with SMTP id 4fb4d7f45d1cf-56e6a1edecfso8839436a12.1; Sun, 19 May 2024 01:18:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1716106694; x=1716711494; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=poVyIDrS2b/ZXWDdTK9RH0R8g9cefahYbIBUWzC1UWE=; b=jeRjTQhMP7NCzzMZAdbetCVu6Nfzk2EsNnOrsC2cw6aLAlaUdzyhCD7+zCLfBSou+x 0ycYHPi+TDEIAbsJ2Iz4QLe+aCywhQNZZmTY7a0bHSRYvokRIQAaYmcK3YNFFxt8jGUo 7UGrnYCvHAIJUMXH1T0y/1Cly6AIN5uPtUJnU9ARlIZcKxRALKB8J+7+hkNPeidGMggq aAm6iSEWYzYTkADW+KobgFdzkTeKNDHQxbwKz1UuQ+UIXAXiw8QgQI8vsqNvSQ+Nr985 oiYMAhPL0ZY/Cp7KVQWuBRTUEdjdRtteUeQ4FK1VTLEbr1c4yKotgafT4xB0AxP+H/mB 8Mog== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716106694; x=1716711494; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=poVyIDrS2b/ZXWDdTK9RH0R8g9cefahYbIBUWzC1UWE=; b=SlpBUyuMLG2+pwyA5vWomouLfvaiDw0s1pHLzC99iianAA0tw93ECzWKmoppLxPNIN zlW74v6kCS/eAEUvA96WkYn1qnTsMVpGjFjKawdQXKvG81P8G5WsoFE1lpF+j4hyh3eE SQ5G3LYuwx1aHPagSSwLNyE58jDY56torTm+NU0kI/qJivGltH7aFxSmif/fnaUuXPMT ep68gZMptK9bl+svU0sEiOmczDyK3CXev1GdV/SfceOG7qCktdwz+0K1v5D585mXZ+sJ dT9uydjFVE1Sh66abiacBkAfoWr4cq5ka6RS/jliW/BboFXi0+WB6hRW8dMovB/w2oex yRxw== X-Forwarded-Encrypted: i=1; AJvYcCX7KEZbss49QlhvZ/PaMoAXc+M2k1WnMdTM+LsybkDEgmuSzH1/Lhnx47/PSdJyxwtykvKkZec29qrrlOIEfybIiqVKt1ymHNC+RuR4D2zmPtQigbGHyPKW2ZsrJwx4+pbweLxRzmmZoLytS4vPbRO6hb8YuQJWBMmfKoGZ6nHLzhcSmzdLHAjVtmpl86cuvm7mAIx90E57GAoTTQofd8BHsBj1EC7+tFo= X-Gm-Message-State: AOJu0YzjlMjgvFStcZt+4Ha1odKh77h1mSjxbmsmE4zhjTrIKQt0cYHp WZQHYQc1SiAZbUP5O12W69sKq7HSWyEkn/+UMzigGOJpsift/03z X-Google-Smtp-Source: AGHT+IGQa8zVgMIpXHn5fL36pQriqk81CxAIOwu4Q/GOcm6if0MbIKvWzuXoQIkeTLfj7lgw3wlfQA== X-Received: by 2002:a50:d7cf:0:b0:572:4041:5637 with SMTP id 4fb4d7f45d1cf-5764d216677mr1442834a12.19.1716106694018; Sun, 19 May 2024 01:18:14 -0700 (PDT) Received: from hex.my.domain (83.8.125.62.ipv4.supernova.orange.pl. [83.8.125.62]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5733c34e5ccsm13698518a12.95.2024.05.19.01.18.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 May 2024 01:18:13 -0700 (PDT) From: Artur Weber Date: Sun, 19 May 2024 10:17:50 +0200 Subject: [PATCH v3 4/8] ASoC: samsung: midas_wm1811: Add GPIO-based headset jack detection Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240519-midas-wm1811-gpio-jack-v3-4-0c1736144c0e@gmail.com> References: <20240519-midas-wm1811-gpio-jack-v3-0-0c1736144c0e@gmail.com> In-Reply-To: <20240519-midas-wm1811-gpio-jack-v3-0-0c1736144c0e@gmail.com> To: Sylwester Nawrocki , Krzysztof Kozlowski Cc: Liam Girdwood , Mark Brown , Rob Herring , Conor Dooley , Jaroslav Kysela , Takashi Iwai , Alim Akhtar , alsa-devel@alsa-project.org, linux-sound@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, ~postmarketos/upstreaming@lists.sr.ht, Artur Weber X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1716106686; l=12054; i=aweber.kernel@gmail.com; s=20231030; h=from:subject:message-id; bh=tvVeHRzJ1CkifWQbFGlvF0EVZIoz7vxKkkPUGFuk7jM=; b=8flwnlB7SYsRO5RtN1w9LStOJfL32UqWv3Gbo2yMVLTM8PnfFqsqFsLlT6as/IJSTfZb5qvVT 7NTh9Ah/erDBordCCHtqCMN3CuXMByB6mTOmnVRZfrumGR3kcDwZSvL X-Developer-Key: i=aweber.kernel@gmail.com; a=ed25519; pk=RhDBfWbJEHqDibXbhNEBAnc9FMkyznGxX/hwfhL8bv8= Some Samsung devices that use the midas_wm1811 driver use a GPIO-based method for detecting whether the headset jack is plugged in, as well as detecting which headset buttons are pressed. There are two GPIOs: a "headset detect" GPIO responsible for detecting jack insertion, and a "headset key" GPIO which triggers when a button on the headset is pressed. The plug type and the button pressed are determined based on information from an ADC channel. The headset mic is enabled by a headset mic bias regulator. Add support for the GPIO-based headset jack detection mechanism, and make it configurable from the device tree. This implementation borrows somewhat from the aries_wm8994.c driver, though there are a few changes to make the code cleaner, and to add support for DT-based configuration. Notably, a dependency on IIO is introduced, to accommodate the ADC reading requirement. Signed-off-by: Artur Weber --- Changes in v2: - Added separate headset mic bias regulator - Added samsung preset to threshold properties - Replaced dev_err+return with return dev_err_probe where needed --- sound/soc/samsung/Kconfig | 2 +- sound/soc/samsung/midas_wm1811.c | 286 +++++++++++++++++++++++++++++++++++++-- 2 files changed, 277 insertions(+), 11 deletions(-) diff --git a/sound/soc/samsung/Kconfig b/sound/soc/samsung/Kconfig index 93c2b1b08d0a..4b1ea7b2c796 100644 --- a/sound/soc/samsung/Kconfig +++ b/sound/soc/samsung/Kconfig @@ -140,7 +140,7 @@ config SND_SOC_SAMSUNG_ARIES_WM8994 config SND_SOC_SAMSUNG_MIDAS_WM1811 tristate "SoC I2S Audio support for Midas boards" - depends on SND_SOC_SAMSUNG + depends on SND_SOC_SAMSUNG && IIO select SND_SAMSUNG_I2S select SND_SOC_WM8994 help diff --git a/sound/soc/samsung/midas_wm1811.c b/sound/soc/samsung/midas_wm1811.c index ab0a4804b45e..ce94550ee32e 100644 --- a/sound/soc/samsung/midas_wm1811.c +++ b/sound/soc/samsung/midas_wm1811.c @@ -7,7 +7,9 @@ #include #include +#include #include +#include #include #include #include @@ -32,6 +34,9 @@ struct midas_priv { struct regulator *reg_headset_mic_bias; struct gpio_desc *gpio_fm_sel; struct gpio_desc *gpio_lineout_sel; + struct gpio_desc *gpio_headset_detect; + struct gpio_desc *gpio_headset_key; + struct iio_channel *adc_headset_detect; unsigned int fll1_rate; struct snd_soc_jack headset_jack; @@ -48,6 +53,131 @@ static struct snd_soc_jack_pin headset_jack_pins[] = { }, }; +/* + * min_mv/max_mv values in this struct are set up based on DT values. + */ +static struct snd_soc_jack_zone headset_jack_zones[] = { + { .jack_type = SND_JACK_HEADPHONE, }, + { .jack_type = SND_JACK_HEADSET, }, + { .jack_type = SND_JACK_HEADPHONE, }, +}; + +/* + * This is used for manual detection in headset_key_check, we reuse the + * structure since it's convenient. + * + * min_mv/max_mv values in this struct are set up based on DT values. + */ +static struct snd_soc_jack_zone headset_key_zones[] = { + { .jack_type = SND_JACK_BTN_0, }, /* Media */ + { .jack_type = SND_JACK_BTN_1, }, /* Volume Up */ + { .jack_type = SND_JACK_BTN_2, }, /* Volume Down */ +}; + +static int headset_jack_check(void *data) +{ + struct midas_priv *priv = (struct midas_priv *) data; + int adc, jack_type, ret; + int bias_already_on = 0; + + if (!gpiod_get_value_cansleep(priv->gpio_headset_detect)) + return 0; + + if (priv->reg_headset_mic_bias) { + /* + * Get state of Headset Mic switch by checking the headset mic + * bias regulator + */ + bias_already_on = \ + regulator_is_enabled(priv->reg_headset_mic_bias); + + /* + * If it's not enabled yet, temporarily enable headset mic bias + * for ADC measurement + */ + if (bias_already_on < 0) + pr_err("%s: Failed to get headset mic bias state: %d", + __func__, ret); + else if (!bias_already_on) { + ret = regulator_enable(priv->reg_headset_mic_bias); + if (ret) + pr_err("%s: Failed to enable micbias: %d\n", + __func__, ret); + } + } + + /* Sleep for a small amount of time to get the value to stabilize */ + msleep(20); + + ret = iio_read_channel_processed(priv->adc_headset_detect, &adc); + if (ret) { + pr_err("%s: Failed to read ADC (%d), assuming headphones\n", + __func__, ret); + return SND_JACK_HEADPHONE; + } + pr_debug("%s: ADC value is %d\n", __func__, adc); + + jack_type = snd_soc_jack_get_type(&priv->headset_jack, adc); + + /* + * Revert the headset mic bias supply to its previous state + * (i.e. if it was disabled before the check, disable it again) + */ + if (priv->reg_headset_mic_bias && bias_already_on == 0) { + ret = regulator_disable(priv->reg_headset_mic_bias); + if (ret) + pr_err("%s: Failed to disable micbias: %d\n", + __func__, ret); + } + + return jack_type; +} + +static int headset_key_check(void *data) +{ + struct midas_priv *priv = (struct midas_priv *) data; + int adc, i, ret; + + if (!gpiod_get_value_cansleep(priv->gpio_headset_key)) + return 0; + + /* Filter out keypresses when 4 pole jack not detected */ + if (!(priv->headset_jack.status & SND_JACK_MICROPHONE)) + return 0; + + ret = iio_read_channel_processed(priv->adc_headset_detect, &adc); + if (ret) { + pr_err("%s: Failed to read ADC (%d), can't detect key type\n", + __func__, ret); + return 0; + } + pr_debug("%s: ADC value is %d\n", __func__, adc); + + for (i = 0; i < ARRAY_SIZE(headset_key_zones); i++) { + if (adc >= headset_key_zones[i].min_mv && + adc <= headset_key_zones[i].max_mv) { + return headset_key_zones[i].jack_type; + } + } + + return 0; +} + +static struct snd_soc_jack_gpio headset_gpio[] = { + { + .name = "Headset Jack", + .report = SND_JACK_HEADSET, + .debounce_time = 150, + .jack_status_check = headset_jack_check, + }, + { + .name = "Headset Key", + .report = SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2, + .debounce_time = 30, + .jack_status_check = headset_key_check, + }, +}; + static int midas_start_fll1(struct snd_soc_pcm_runtime *rtd, unsigned int rate) { struct snd_soc_card *card = rtd->card; @@ -335,18 +465,67 @@ static int midas_late_probe(struct snd_soc_card *card) return ret; } - ret = snd_soc_card_jack_new_pins(card, "Headset", - SND_JACK_HEADSET | SND_JACK_MECHANICAL | - SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2 | - SND_JACK_BTN_3 | SND_JACK_BTN_4 | SND_JACK_BTN_5, - &priv->headset_jack, - headset_jack_pins, - ARRAY_SIZE(headset_jack_pins)); - if (ret) + if (!priv->gpio_headset_detect) { + ret = snd_soc_card_jack_new_pins(card, "Headset", + SND_JACK_HEADSET | SND_JACK_MECHANICAL | + SND_JACK_BTN_0 | SND_JACK_BTN_1 | + SND_JACK_BTN_2 | SND_JACK_BTN_3 | + SND_JACK_BTN_4 | SND_JACK_BTN_5, + &priv->headset_jack, + headset_jack_pins, + ARRAY_SIZE(headset_jack_pins)); + if (ret) + return ret; + + wm8958_mic_detect(aif1_dai->component, &priv->headset_jack, + NULL, NULL, NULL, NULL); + } else { + /* Some devices (n8000, t310) use a GPIO to detect the jack. */ + ret = snd_soc_card_jack_new_pins(card, "Headset", + SND_JACK_HEADSET | SND_JACK_BTN_0 | + SND_JACK_BTN_1 | SND_JACK_BTN_2, + &priv->headset_jack, + headset_jack_pins, + ARRAY_SIZE(headset_jack_pins)); + if (ret) { + dev_err(card->dev, + "Failed to set up headset pins: %d\n", ret); + return ret; + } + + ret = snd_soc_jack_add_zones(&priv->headset_jack, + ARRAY_SIZE(headset_jack_zones), + headset_jack_zones); + if (ret) { + dev_err(card->dev, + "Failed to set up headset zones: %d\n", ret); + return ret; + } + + headset_gpio[0].data = priv; + headset_gpio[0].desc = priv->gpio_headset_detect; + + headset_gpio[1].data = priv; + headset_gpio[1].desc = priv->gpio_headset_key; + + snd_jack_set_key(priv->headset_jack.jack, + SND_JACK_BTN_0, KEY_MEDIA); + snd_jack_set_key(priv->headset_jack.jack, + SND_JACK_BTN_1, KEY_VOLUMEUP); + snd_jack_set_key(priv->headset_jack.jack, + SND_JACK_BTN_2, KEY_VOLUMEDOWN); + + ret = snd_soc_jack_add_gpios(&priv->headset_jack, + ARRAY_SIZE(headset_gpio), + headset_gpio); + if (ret) + dev_err(card->dev, + "Failed to set up headset jack GPIOs: %d\n", + ret); + return ret; + } - wm8958_mic_detect(aif1_dai->component, &priv->headset_jack, - NULL, NULL, NULL, NULL); return 0; } @@ -453,6 +632,9 @@ static int midas_probe(struct platform_device *pdev) struct snd_soc_card *card = &midas_card; struct device *dev = &pdev->dev; static struct snd_soc_dai_link *dai_link; + enum iio_chan_type channel_type; + u32 fourpole_threshold[2]; + u32 button_threshold[3]; struct midas_priv *priv; int ret, i; @@ -499,6 +681,90 @@ static int midas_probe(struct platform_device *pdev) return PTR_ERR(priv->gpio_lineout_sel); } + priv->gpio_headset_detect = devm_gpiod_get_optional(dev, + "headset-detect", GPIOD_IN); + if (IS_ERR(priv->gpio_headset_detect)) + return dev_err_probe(dev, PTR_ERR(priv->gpio_headset_detect), + "Failed to get headset jack detect GPIO\n"); + + if (priv->gpio_headset_detect) { + priv->adc_headset_detect = devm_iio_channel_get(dev, + "headset-detect"); + if (IS_ERR(priv->adc_headset_detect)) + return dev_err_probe(dev, + PTR_ERR(priv->adc_headset_detect), + "Failed to get ADC channel\n"); + + ret = iio_get_channel_type(priv->adc_headset_detect, + &channel_type); + if (ret) { + dev_err(dev, "Failed to get ADC channel type\n"); + return ret; + } + + if (channel_type != IIO_VOLTAGE) { + dev_err(dev, "ADC channel is not voltage\n"); + return ret; + } + + priv->gpio_headset_key = devm_gpiod_get(dev, "headset-key", + GPIOD_IN); + if (IS_ERR(priv->gpio_headset_key)) + return dev_err_probe(dev, + PTR_ERR(priv->gpio_headset_key), + "Failed to get headset key GPIO\n"); + + ret = of_property_read_u32_array(dev->of_node, + "samsung,headset-4pole-threshold-microvolt", + fourpole_threshold, + ARRAY_SIZE(fourpole_threshold)); + if (ret) { + dev_err(dev, "Failed to get 4-pole jack detection threshold\n"); + return ret; + } + + if (fourpole_threshold[0] > fourpole_threshold[1]) { + dev_err(dev, "Invalid 4-pole jack detection threshold value\n"); + return -EINVAL; + } + + headset_jack_zones[0].max_mv = (fourpole_threshold[0]); + headset_jack_zones[1].min_mv = (fourpole_threshold[0] + 1); + + headset_jack_zones[1].max_mv = (fourpole_threshold[1]); + headset_jack_zones[2].min_mv = (fourpole_threshold[1] + 1); + + ret = of_property_read_u32_array(dev->of_node, + "samsung,headset-button-threshold-microvolt", + button_threshold, + ARRAY_SIZE(button_threshold)); + if (ret) { + dev_err(dev, "Failed to get headset button detection threshold\n"); + return ret; + } + + if (button_threshold[0] > button_threshold[1] || + button_threshold[1] > button_threshold[2]) { + dev_err(dev, "Invalid headset button detection threshold value\n"); + return -EINVAL; + } + + for (i = 0; i < 3; i++) { + if (i != 0 && button_threshold[i] <= 0) { + dev_err(dev, "Invalid headset button detection threshold value\n"); + return -EINVAL; + } + + headset_key_zones[i].min_mv = button_threshold[i]; + + if (i == 2) + headset_key_zones[i].max_mv = UINT_MAX; + else + headset_key_zones[i].max_mv = \ + (button_threshold[i+1] - 1); + } + } + ret = snd_soc_of_parse_card_name(card, "model"); if (ret < 0) { dev_err(dev, "Card name is not specified\n");