sound/soc/mediatek/mt8183/mt8183-dai-i2s.c

Source file repositories/reference/linux-study-clean/sound/soc/mediatek/mt8183/mt8183-dai-i2s.c

File Facts

System
Linux kernel
Corpus path
sound/soc/mediatek/mt8183/mt8183-dai-i2s.c
Extension
.c
Size
32189 bytes
Lines
1059
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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 mtk_afe_i2s_priv {
	int id;
	int rate; /* for determine which apll to use */
	int low_jitter_en;

	int share_i2s_id;

	int mclk_id;
	int mclk_rate;
	int mclk_apll;

	int use_eiaj;
};

static unsigned int get_i2s_wlen(snd_pcm_format_t format)
{
	return snd_pcm_format_physical_width(format) <= 16 ?
	       I2S_WLEN_16_BIT : I2S_WLEN_32_BIT;
}

#define MTK_AFE_I2S0_KCONTROL_NAME "I2S0_HD_Mux"
#define MTK_AFE_I2S1_KCONTROL_NAME "I2S1_HD_Mux"
#define MTK_AFE_I2S2_KCONTROL_NAME "I2S2_HD_Mux"
#define MTK_AFE_I2S3_KCONTROL_NAME "I2S3_HD_Mux"
#define MTK_AFE_I2S5_KCONTROL_NAME "I2S5_HD_Mux"

#define I2S0_HD_EN_W_NAME "I2S0_HD_EN"
#define I2S1_HD_EN_W_NAME "I2S1_HD_EN"
#define I2S2_HD_EN_W_NAME "I2S2_HD_EN"
#define I2S3_HD_EN_W_NAME "I2S3_HD_EN"
#define I2S5_HD_EN_W_NAME "I2S5_HD_EN"

#define I2S0_MCLK_EN_W_NAME "I2S0_MCLK_EN"
#define I2S1_MCLK_EN_W_NAME "I2S1_MCLK_EN"
#define I2S2_MCLK_EN_W_NAME "I2S2_MCLK_EN"
#define I2S3_MCLK_EN_W_NAME "I2S3_MCLK_EN"
#define I2S5_MCLK_EN_W_NAME "I2S5_MCLK_EN"

static int get_i2s_id_by_name(struct mtk_base_afe *afe,
			      const char *name)
{
	if (strncmp(name, "I2S0", 4) == 0)
		return MT8183_DAI_I2S_0;
	else if (strncmp(name, "I2S1", 4) == 0)
		return MT8183_DAI_I2S_1;
	else if (strncmp(name, "I2S2", 4) == 0)
		return MT8183_DAI_I2S_2;
	else if (strncmp(name, "I2S3", 4) == 0)
		return MT8183_DAI_I2S_3;
	else if (strncmp(name, "I2S5", 4) == 0)
		return MT8183_DAI_I2S_5;
	else
		return -EINVAL;
}

static struct mtk_afe_i2s_priv *get_i2s_priv_by_name(struct mtk_base_afe *afe,
						     const char *name)
{
	struct mt8183_afe_private *afe_priv = afe->platform_priv;
	int dai_id = get_i2s_id_by_name(afe, name);

	if (dai_id < 0)
		return NULL;

	return afe_priv->dai_priv[dai_id];
}

/* low jitter control */
static const char * const mt8183_i2s_hd_str[] = {
	"Normal", "Low_Jitter"
};

static const struct soc_enum mt8183_i2s_enum[] = {
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(mt8183_i2s_hd_str),
			    mt8183_i2s_hd_str),
};

static int mt8183_i2s_hd_get(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *cmpnt = snd_kcontrol_chip(kcontrol);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
	struct mtk_afe_i2s_priv *i2s_priv;

	i2s_priv = get_i2s_priv_by_name(afe, kcontrol->id.name);

	if (!i2s_priv) {
		dev_warn(afe->dev, "%s(), i2s_priv == NULL", __func__);
		return -EINVAL;
	}

Annotation

Implementation Notes