sound/soc/intel/avs/boards/rt274.c

Source file repositories/reference/linux-study-clean/sound/soc/intel/avs/boards/rt274.c

File Facts

System
Linux kernel
Corpus path
sound/soc/intel/avs/boards/rt274.c
Extension
.c
Size
7943 bytes
Lines
281
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

if (ret) {
			dev_err(codec_dai->dev, "failed to enable PLL2: %d\n", ret);
			return ret;
		}
	}

	return 0;
}

static const struct snd_soc_dapm_widget card_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_MIC("Mic Jack", NULL),
	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0, avs_rt274_clock_control,
			    SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
};

static const struct snd_soc_dapm_route card_base_routes[] = {
	{"Headphone Jack", NULL, "HPO Pin"},
	{"MIC", NULL, "Mic Jack"},

	{"Headphone Jack", NULL, "Platform Clock"},
	{"MIC", NULL, "Platform Clock"},
};

static const struct snd_soc_jack_pin card_headset_pins[] = {
	{
		.pin = "Headphone Jack",
		.mask = SND_JACK_HEADPHONE,
	},
	{
		.pin = "Mic Jack",
		.mask = SND_JACK_MICROPHONE,
	},
};

static int avs_rt274_codec_init(struct snd_soc_pcm_runtime *runtime)
{
	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(runtime, 0);
	struct snd_soc_component *component = codec_dai->component;
	struct snd_soc_jack_pin *pins;
	struct snd_soc_jack *jack;
	struct snd_soc_card *card = runtime->card;
	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
	int num_pins, ret;

	jack = snd_soc_card_get_drvdata(card);
	num_pins = ARRAY_SIZE(card_headset_pins);

	pins = devm_kmemdup_array(card->dev, card_headset_pins, num_pins,
				  sizeof(card_headset_pins[0]), GFP_KERNEL);
	if (!pins)
		return -ENOMEM;

	ret = snd_soc_card_jack_new_pins(card, "Headset Jack", SND_JACK_HEADSET, jack, pins,
					 num_pins);
	if (ret)
		return ret;

	snd_soc_component_set_jack(component, jack, NULL);

	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
	if (ret < 0) {
		dev_err(card->dev, "can't set codec pcm format %d\n", ret);
		return ret;
	}

	snd_soc_dapm_set_idle_bias(dapm, false);

	return 0;
}

static void avs_rt274_codec_exit(struct snd_soc_pcm_runtime *rtd)
{
	snd_soc_component_set_jack(snd_soc_rtd_to_codec(rtd, 0)->component, NULL, NULL);
}

static int avs_rt274_be_fixup(struct snd_soc_pcm_runtime *runtime, struct snd_pcm_hw_params *params)
{
	struct snd_interval *rate, *channels;
	struct snd_mask *fmt;

	rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
	channels = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
	fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);

	/* The ADSP will convert the FE rate to 48k, stereo */
	rate->min = rate->max = AVS_RT274_BE_FIXUP_RATE;
	channels->min = channels->max = 2;

Annotation

Implementation Notes