sound/soc/codecs/rt1015p.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/rt1015p.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/rt1015p.c
Extension
.c
Size
3729 bytes
Lines
155
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

struct rt1015p_priv {
	struct gpio_desc *sdb;
	bool calib_done;
};

static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_component *component =
		snd_soc_dapm_to_component(w->dapm);
	struct rt1015p_priv *rt1015p =
		snd_soc_component_get_drvdata(component);

	if (!rt1015p->sdb)
		return 0;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		gpiod_set_value_cansleep(rt1015p->sdb, 1);
		dev_dbg(component->dev, "set sdb to 1");

		if (!rt1015p->calib_done) {
			msleep(300);
			rt1015p->calib_done = true;
		}
		break;
	case SND_SOC_DAPM_POST_PMD:
		gpiod_set_value_cansleep(rt1015p->sdb, 0);
		dev_dbg(component->dev, "set sdb to 0");
		break;
	default:
		break;
	}

	return 0;
}

static const struct snd_soc_dapm_widget rt1015p_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("Speaker"),
	SND_SOC_DAPM_OUT_DRV_E("SDB", SND_SOC_NOPM, 0, 0, NULL, 0,
			rt1015p_sdb_event,
			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
};

static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = {
	{"SDB", NULL, "HiFi Playback"},
	{"Speaker", NULL, "SDB"},
};

#ifdef CONFIG_PM
static int rt1015p_suspend(struct snd_soc_component *component)
{
	struct rt1015p_priv *rt1015p = snd_soc_component_get_drvdata(component);

	rt1015p->calib_done = false;
	return 0;
}
#else
#define rt1015p_suspend NULL
#endif

static const struct snd_soc_component_driver rt1015p_component_driver = {
	.suspend		= rt1015p_suspend,
	.dapm_widgets		= rt1015p_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(rt1015p_dapm_widgets),
	.dapm_routes		= rt1015p_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(rt1015p_dapm_routes),
	.idle_bias_on		= 1,
	.use_pmdown_time	= 1,
	.endianness		= 1,
};

static struct snd_soc_dai_driver rt1015p_dai_driver = {
	.name = "HiFi",
	.playback = {
		.stream_name	= "HiFi Playback",
		.formats	= SNDRV_PCM_FMTBIT_S24 |
					SNDRV_PCM_FMTBIT_S32,
		.rates		= SNDRV_PCM_RATE_48000,
		.channels_min	= 1,
		.channels_max	= 2,
	},
};

static int rt1015p_platform_probe(struct platform_device *pdev)
{
	struct rt1015p_priv *rt1015p;

	rt1015p = devm_kzalloc(&pdev->dev, sizeof(*rt1015p), GFP_KERNEL);
	if (!rt1015p)

Annotation

Implementation Notes