linux-kernel - [PATCH v1 2/4] ASoC: tegra: Support CPCAP by machine driver

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Message-ID: <20260130133434.353353-3-clamor95@gmail.com>
Date: Fri, 30 Jan 2026 15:34:32 +0200
From: Svyatoslav Ryhel <clamor95@...il.com>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.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>,
	Jonas Schwöbel <jonasschwoebel@...oo.de>
Cc: linux-sound@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/4] ASoC: tegra: Support CPCAP by machine driver

Add CPCAP codec support to the Tegra ASoC machine driver. This codec is
found in Motorola T20 devices like Atrix 4G and Droid X2.

Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
---
 sound/soc/tegra/Kconfig              |  9 +++++
 sound/soc/tegra/tegra_asoc_machine.c | 52 ++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)

diff --git a/sound/soc/tegra/Kconfig b/sound/soc/tegra/Kconfig
index 9dbd589879fb..f9257830daa1 100644
--- a/sound/soc/tegra/Kconfig
+++ b/sound/soc/tegra/Kconfig
@@ -294,6 +294,15 @@ config SND_SOC_TEGRA_SGTL5000
 	  boards using the SGTL5000 codec, such as Apalis T30, Apalis TK1 or
 	  Colibri T30.
 
+config SND_SOC_TEGRA_CPCAP
+	tristate "SoC Audio support for Tegra boards using a CPCAP codec"
+	depends on I2C && GPIOLIB
+	select SND_SOC_TEGRA_MACHINE_DRV
+	select SND_SOC_CPCAP
+	help
+	  Say Y or M here if you want to add support for SoC audio on Tegra
+	  boards using the CPCAP codec, such as Motorola Atrix 4G or Droid X2.
+
 endif
 
 endmenu
diff --git a/sound/soc/tegra/tegra_asoc_machine.c b/sound/soc/tegra/tegra_asoc_machine.c
index d48463ac16fc..10834f9c3422 100644
--- a/sound/soc/tegra/tegra_asoc_machine.c
+++ b/sound/soc/tegra/tegra_asoc_machine.c
@@ -287,6 +287,25 @@ static unsigned int tegra_machine_mclk_rate_6mhz(unsigned int srate)
 	return mclk;
 }
 
+static unsigned int tegra_machine_mclk_rate_cpcap(unsigned int srate)
+{
+	unsigned int mclk;
+
+	switch (srate) {
+	case 11025:
+	case 22050:
+	case 44100:
+	case 88200:
+		mclk = 26000000;
+		break;
+	default:
+		mclk = 256 * srate;
+		break;
+	}
+
+	return mclk;
+}
+
 static int tegra_machine_hw_params(struct snd_pcm_substream *substream,
 				   struct snd_pcm_hw_params *params)
 {
@@ -985,6 +1004,38 @@ static const struct tegra_asoc_data tegra_rt5631_data = {
 	.add_hp_jack = true,
 };
 
+/* CPCAP machine */
+
+SND_SOC_DAILINK_DEFS(cpcap_hifi,
+	DAILINK_COMP_ARRAY(COMP_EMPTY()),
+	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cpcap-hifi")),
+	DAILINK_COMP_ARRAY(COMP_EMPTY()));
+
+static struct snd_soc_dai_link tegra_cpcap_dai = {
+	.name = "CPCAP",
+	.stream_name = "CPCAP PCM",
+	.init = tegra_asoc_machine_init,
+	.dai_fmt = SND_SOC_DAIFMT_I2S |
+		   SND_SOC_DAIFMT_NB_NF |
+		   SND_SOC_DAIFMT_CBP_CFP,
+	SND_SOC_DAILINK_REG(cpcap_hifi),
+};
+
+static struct snd_soc_card snd_soc_tegra_cpcap = {
+	.components = "codec:cpcap",
+	.dai_link = &tegra_cpcap_dai,
+	.num_links = 1,
+	.fully_routed = true,
+};
+
+static const struct tegra_asoc_data tegra_cpcap_data = {
+	.mclk_rate = tegra_machine_mclk_rate_cpcap,
+	.card = &snd_soc_tegra_cpcap,
+	.add_common_dapm_widgets = true,
+	.add_common_controls = true,
+	.add_common_snd_ops = true,
+};
+
 static const struct of_device_id tegra_machine_of_match[] = {
 	{ .compatible = "nvidia,tegra-audio-trimslice", .data = &tegra_trimslice_data },
 	{ .compatible = "nvidia,tegra-audio-max98090", .data = &tegra_max98090_data },
@@ -997,6 +1048,7 @@ static const struct of_device_id tegra_machine_of_match[] = {
 	{ .compatible = "nvidia,tegra-audio-rt5640", .data = &tegra_rt5640_data },
 	{ .compatible = "nvidia,tegra-audio-alc5632", .data = &tegra_rt5632_data },
 	{ .compatible = "nvidia,tegra-audio-rt5631", .data = &tegra_rt5631_data },
+	{ .compatible = "nvidia,tegra-audio-cpcap", .data = &tegra_cpcap_data },
 	{},
 };
 MODULE_DEVICE_TABLE(of, tegra_machine_of_match);
-- 
2.51.0