sound/soc/mediatek/mt8173/mt8173-max98090.c

Source file repositories/reference/linux-study-clean/sound/soc/mediatek/mt8173/mt8173-max98090.c

File Facts

System
Linux kernel
Corpus path
sound/soc/mediatek/mt8173/mt8173-max98090.c
Extension
.c
Size
5748 bytes
Lines
209
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * mt8173-max98090.c  --  MT8173 MAX98090 ALSA SoC machine driver
 *
 * Copyright (c) 2015 MediaTek Inc.
 * Author: Koro Chen <koro.chen@mediatek.com>
 */

#include <linux/module.h>
#include <sound/soc.h>
#include <sound/jack.h>

static struct snd_soc_jack mt8173_max98090_jack;

static struct snd_soc_jack_pin mt8173_max98090_jack_pins[] = {
	{
		.pin	= "Headphone",
		.mask	= SND_JACK_HEADPHONE,
	},
	{
		.pin	= "Headset Mic",
		.mask	= SND_JACK_MICROPHONE,
	},
};

static const struct snd_soc_dapm_widget mt8173_max98090_widgets[] = {
	SND_SOC_DAPM_SPK("Speaker", NULL),
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
};

static const struct snd_soc_dapm_route mt8173_max98090_routes[] = {
	{"Speaker", NULL, "SPKL"},
	{"Speaker", NULL, "SPKR"},
	{"DMICL", NULL, "Int Mic"},
	{"Headphone", NULL, "HPL"},
	{"Headphone", NULL, "HPR"},
	{"Headset Mic", NULL, "MICBIAS"},
	{"IN34", NULL, "Headset Mic"},
};

static const struct snd_kcontrol_new mt8173_max98090_controls[] = {
	SOC_DAPM_PIN_SWITCH("Speaker"),
	SOC_DAPM_PIN_SWITCH("Int Mic"),
	SOC_DAPM_PIN_SWITCH("Headphone"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
};

static int mt8173_max98090_hw_params(struct snd_pcm_substream *substream,
				     struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);

	return snd_soc_dai_set_sysclk(codec_dai, 0, params_rate(params) * 256,
				      SND_SOC_CLOCK_IN);
}

static const struct snd_soc_ops mt8173_max98090_ops = {
	.hw_params = mt8173_max98090_hw_params,
};

static int mt8173_max98090_init(struct snd_soc_pcm_runtime *runtime)
{
	int ret;
	struct snd_soc_card *card = runtime->card;
	struct snd_soc_component *component = snd_soc_rtd_to_codec(runtime, 0)->component;

	/* enable jack detection */
	ret = snd_soc_card_jack_new_pins(card, "Headphone", SND_JACK_HEADSET,
					 &mt8173_max98090_jack,
					 mt8173_max98090_jack_pins,
					 ARRAY_SIZE(mt8173_max98090_jack_pins));
	if (ret) {
		dev_err(card->dev, "Can't create a new Jack %d\n", ret);
		return ret;
	}

	return snd_soc_component_set_jack(component, &mt8173_max98090_jack, NULL);
}

SND_SOC_DAILINK_DEFS(playback,
	DAILINK_COMP_ARRAY(COMP_CPU("DL1")),
	DAILINK_COMP_ARRAY(COMP_DUMMY()),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

SND_SOC_DAILINK_DEFS(capture,
	DAILINK_COMP_ARRAY(COMP_CPU("VUL")),
	DAILINK_COMP_ARRAY(COMP_DUMMY()),

Annotation

Implementation Notes