sound/soc/mediatek/mt8365/mt8365-mt6357.c

Source file repositories/reference/linux-study-clean/sound/soc/mediatek/mt8365/mt8365-mt6357.c

File Facts

System
Linux kernel
Corpus path
sound/soc/mediatek/mt8365/mt8365-mt6357.c
Extension
.c
Size
9121 bytes
Lines
347
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 mt8365_mt6357_priv {
	struct pinctrl *pinctrl;
	struct pinctrl_state *pin_states[PIN_STATE_MAX];
};

enum {
	/* FE */
	DAI_LINK_DL1_PLAYBACK = 0,
	DAI_LINK_DL2_PLAYBACK,
	DAI_LINK_AWB_CAPTURE,
	DAI_LINK_VUL_CAPTURE,
	/* BE */
	DAI_LINK_2ND_I2S_INTF,
	DAI_LINK_DMIC,
	DAI_LINK_INT_ADDA,
	DAI_LINK_NUM
};

static const struct snd_soc_dapm_widget mt8365_mt6357_widgets[] = {
	SND_SOC_DAPM_OUTPUT("HDMI Out"),
};

static const struct snd_soc_dapm_route mt8365_mt6357_routes[] = {
	{"HDMI Out", NULL, "2ND I2S Playback"},
	{"DMIC In", NULL, "MICBIAS0"},
};

static int mt8365_mt6357_int_adda_startup(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	int ret = 0;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (IS_ERR(priv->pin_states[PIN_STATE_MOSI_ON]))
			return ret;

		ret = pinctrl_select_state(priv->pinctrl,
					   priv->pin_states[PIN_STATE_MOSI_ON]);
		if (ret)
			dev_err(rtd->card->dev, "%s failed to select state %d\n",
				__func__, ret);
	}

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		if (IS_ERR(priv->pin_states[PIN_STATE_MISO_ON]))
			return ret;

		ret = pinctrl_select_state(priv->pinctrl,
					   priv->pin_states[PIN_STATE_MISO_ON]);
		if (ret)
			dev_err(rtd->card->dev, "%s failed to select state %d\n",
				__func__, ret);
	}

	return 0;
}

static void mt8365_mt6357_int_adda_shutdown(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(rtd->card);
	int ret = 0;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		if (IS_ERR(priv->pin_states[PIN_STATE_MOSI_OFF]))
			return;

		ret = pinctrl_select_state(priv->pinctrl,
					   priv->pin_states[PIN_STATE_MOSI_OFF]);
		if (ret)
			dev_err(rtd->card->dev, "%s failed to select state %d\n",
				__func__, ret);
	}

	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
		if (IS_ERR(priv->pin_states[PIN_STATE_MISO_OFF]))
			return;

		ret = pinctrl_select_state(priv->pinctrl,
					   priv->pin_states[PIN_STATE_MISO_OFF]);
		if (ret)
			dev_err(rtd->card->dev, "%s failed to select state %d\n",
				__func__, ret);
	}
}

static const struct snd_soc_ops mt8365_mt6357_int_adda_ops = {
	.startup = mt8365_mt6357_int_adda_startup,
	.shutdown = mt8365_mt6357_int_adda_shutdown,

Annotation

Implementation Notes