sound/soc/mediatek/mt8195/mt8195-dai-pcm.c

Source file repositories/reference/linux-study-clean/sound/soc/mediatek/mt8195/mt8195-dai-pcm.c

File Facts

System
Linux kernel
Corpus path
sound/soc/mediatek/mt8195/mt8195-dai-pcm.c
Extension
.c
Size
9300 bytes
Lines
370
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 mtk_dai_pcm_rate {
	unsigned int rate;
	unsigned int reg_value;
};

struct mtk_dai_pcmif_priv {
	unsigned int slave_mode;
	unsigned int lrck_inv;
	unsigned int bck_inv;
	unsigned int format;
};

static const struct mtk_dai_pcm_rate mtk_dai_pcm_rates[] = {
	{ .rate = 8000, .reg_value = 0, },
	{ .rate = 16000, .reg_value = 1, },
	{ .rate = 32000, .reg_value = 2, },
	{ .rate = 48000, .reg_value = 3, },
	{ .rate = 11025, .reg_value = 1, },
	{ .rate = 22050, .reg_value = 2, },
	{ .rate = 44100, .reg_value = 3, },
};

static int mtk_dai_pcm_mode(unsigned int rate)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(mtk_dai_pcm_rates); i++)
		if (mtk_dai_pcm_rates[i].rate == rate)
			return mtk_dai_pcm_rates[i].reg_value;

	return -EINVAL;
}

static const struct snd_kcontrol_new mtk_dai_pcm_o000_mix[] = {
	SOC_DAPM_SINGLE_AUTODISABLE("I000 Switch", AFE_CONN0, 0, 1, 0),
	SOC_DAPM_SINGLE_AUTODISABLE("I070 Switch", AFE_CONN0_2, 6, 1, 0),
};

static const struct snd_kcontrol_new mtk_dai_pcm_o001_mix[] = {
	SOC_DAPM_SINGLE_AUTODISABLE("I001 Switch", AFE_CONN1, 1, 1, 0),
	SOC_DAPM_SINGLE_AUTODISABLE("I071 Switch", AFE_CONN1_2, 7, 1, 0),
};

static const struct snd_soc_dapm_widget mtk_dai_pcm_widgets[] = {
	SND_SOC_DAPM_MIXER("I002", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_MIXER("I003", SND_SOC_NOPM, 0, 0, NULL, 0),
	SND_SOC_DAPM_MIXER("O000", SND_SOC_NOPM, 0, 0,
			   mtk_dai_pcm_o000_mix,
			   ARRAY_SIZE(mtk_dai_pcm_o000_mix)),
	SND_SOC_DAPM_MIXER("O001", SND_SOC_NOPM, 0, 0,
			   mtk_dai_pcm_o001_mix,
			   ARRAY_SIZE(mtk_dai_pcm_o001_mix)),

	SND_SOC_DAPM_SUPPLY("PCM_EN", PCM_INTF_CON1,
			    PCM_INTF_CON1_PCM_EN_SHIFT, 0, NULL, 0),

	SND_SOC_DAPM_INPUT("PCM1_INPUT"),
	SND_SOC_DAPM_OUTPUT("PCM1_OUTPUT"),

	SND_SOC_DAPM_CLOCK_SUPPLY("aud_asrc11"),
	SND_SOC_DAPM_CLOCK_SUPPLY("aud_asrc12"),
	SND_SOC_DAPM_CLOCK_SUPPLY("aud_pcmif"),
};

static const struct snd_soc_dapm_route mtk_dai_pcm_routes[] = {
	{"I002", NULL, "PCM1 Capture"},
	{"I003", NULL, "PCM1 Capture"},

	{"O000", "I000 Switch", "I000"},
	{"O001", "I001 Switch", "I001"},

	{"O000", "I070 Switch", "I070"},
	{"O001", "I071 Switch", "I071"},

	{"PCM1 Playback", NULL, "O000"},
	{"PCM1 Playback", NULL, "O001"},

	{"PCM1 Playback", NULL, "PCM_EN"},
	{"PCM1 Playback", NULL, "aud_asrc12"},
	{"PCM1 Playback", NULL, "aud_pcmif"},

	{"PCM1 Capture", NULL, "PCM_EN"},
	{"PCM1 Capture", NULL, "aud_asrc11"},
	{"PCM1 Capture", NULL, "aud_pcmif"},

	{"PCM1_OUTPUT", NULL, "PCM1 Playback"},
	{"PCM1 Capture", NULL, "PCM1_INPUT"},
};

static int mtk_dai_pcm_configure(struct snd_pcm_substream *substream,

Annotation

Implementation Notes