linux-kernel - [PATCH v2 2/8] ASoC: tegra: Support coupled mic-hp detection

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Date:   Wed,  8 Mar 2023 09:34:56 +0200
From:   Svyatoslav Ryhel <clamor95@...il.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Svyatoslav Ryhel <clamor95@...il.com>,
        Maxim Schwalm <maxim.schwalm@...il.com>,
        Dmitry Osipenko <digetx@...il.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        alsa-devel@...a-project.org, linux-tegra@...r.kernel.org,
        linux-staging@...ts.linux.dev
Subject: [PATCH v2 2/8] ASoC: tegra: Support coupled mic-hp detection

This quirk is used for cases when there is GPIO which detects
any type of 3.5 Jack insertion and actual type of jack is defined
by other GPIO. 3.5 Jack GPIO generates interrupt and MIC GPIO
indicates type of Jack only if 3.5 Jack GPIO is active.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 sound/soc/tegra/tegra_asoc_machine.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/sound/soc/tegra/tegra_asoc_machine.c b/sound/soc/tegra/tegra_asoc_machine.c
index 78faa8bcae27..7b6d5d90c3a2 100644
--- a/sound/soc/tegra/tegra_asoc_machine.c
+++ b/sound/soc/tegra/tegra_asoc_machine.c
@@ -51,6 +51,17 @@ static struct snd_soc_jack_gpio tegra_machine_headset_jack_gpio = {
 };
 
 /* Mic Jack */
+static int coupled_mic_hp_check(void *data)
+{
+	struct tegra_machine *machine = (struct tegra_machine *)data;
+
+	/* Detect mic insertion only if 3.5 jack is in */
+	if (gpiod_get_value_cansleep(machine->gpiod_hp_det) &&
+	    gpiod_get_value_cansleep(machine->gpiod_mic_det))
+		return SND_JACK_MICROPHONE;
+
+	return 0;
+}
 
 static struct snd_soc_jack tegra_machine_mic_jack;
 
@@ -183,8 +194,15 @@ int tegra_asoc_machine_init(struct snd_soc_pcm_runtime *rtd)
 			return err;
 		}
 
+		tegra_machine_mic_jack_gpio.data = machine;
 		tegra_machine_mic_jack_gpio.desc = machine->gpiod_mic_det;
 
+		if (of_property_read_bool(card->dev->of_node,
+					  "nvidia,coupled-mic-hp-det")) {
+			tegra_machine_mic_jack_gpio.desc = machine->gpiod_hp_det;
+			tegra_machine_mic_jack_gpio.jack_status_check = coupled_mic_hp_check;
+		};
+
 		err = snd_soc_jack_add_gpios(&tegra_machine_mic_jack, 1,
 					     &tegra_machine_mic_jack_gpio);
 		if (err)
-- 
2.37.2