sound/soc/intel/avs/boards/max98927.c

Source file repositories/reference/linux-study-clean/sound/soc/intel/avs/boards/max98927.c

File Facts

System
Linux kernel
Corpus path
sound/soc/intel/avs/boards/max98927.c
Extension
.c
Size
6006 bytes
Lines
211
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 < 0) {
			dev_err(runtime->dev, "hw_params for %s failed: %d\n",
				codec_dai->component->name, ret);
			return ret;
		}
	}

	return 0;
}

static const struct snd_soc_ops avs_max98927_ops = {
	.hw_params = avs_max98927_hw_params,
};

static int avs_create_dai_link(struct device *dev, int ssp_port, int tdm_slot,
			       struct snd_soc_dai_link **dai_link)
{
	struct snd_soc_dai_link_component *platform;
	struct snd_soc_dai_link *dl;

	dl = devm_kzalloc(dev, sizeof(*dl), GFP_KERNEL);
	platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL);
	if (!dl || !platform)
		return -ENOMEM;

	dl->name = devm_kasprintf(dev, GFP_KERNEL,
				  AVS_STRING_FMT("SSP", "-Codec", ssp_port, tdm_slot));
	dl->cpus = devm_kzalloc(dev, sizeof(*dl->cpus), GFP_KERNEL);
	dl->codecs = devm_kcalloc(dev, 2, sizeof(*dl->codecs), GFP_KERNEL);
	if (!dl->name || !dl->cpus || !dl->codecs)
		return -ENOMEM;

	dl->cpus->dai_name = devm_kasprintf(dev, GFP_KERNEL,
					    AVS_STRING_FMT("SSP", " Pin", ssp_port, tdm_slot));
	dl->codecs[0].name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_DEV0_NAME);
	dl->codecs[0].dai_name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_CODEC_NAME);
	dl->codecs[1].name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_DEV1_NAME);
	dl->codecs[1].dai_name = devm_kasprintf(dev, GFP_KERNEL, MAX98927_CODEC_NAME);
	if (!dl->cpus->dai_name || !dl->codecs[0].name || !dl->codecs[0].dai_name ||
	    !dl->codecs[1].name || !dl->codecs[1].dai_name)
		return -ENOMEM;

	platform->name = dev_name(dev);
	dl->num_cpus = 1;
	dl->num_codecs = 2;
	dl->platforms = platform;
	dl->num_platforms = 1;
	dl->id = 0;
	dl->dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBC_CFC;
	dl->be_hw_params_fixup = avs_max98927_be_fixup;
	dl->nonatomic = 1;
	dl->no_pcm = 1;
	dl->ignore_pmdown_time = 1;
	dl->ops = &avs_max98927_ops;

	*dai_link = dl;

	return 0;
}

static int avs_max98927_probe(struct platform_device *pdev)
{
	struct snd_soc_dai_link *dai_link;
	struct snd_soc_acpi_mach *mach;
	struct avs_mach_pdata *pdata;
	struct snd_soc_card *card;
	struct device *dev = &pdev->dev;
	int ssp_port, tdm_slot, ret;

	mach = dev_get_platdata(dev);
	pdata = mach->pdata;

	ret = avs_mach_get_ssp_tdm(dev, mach, &ssp_port, &tdm_slot);
	if (ret)
		return ret;

	ret = avs_create_dai_link(dev, ssp_port, tdm_slot, &dai_link);
	if (ret) {
		dev_err(dev, "Failed to create dai link: %d", ret);
		return ret;
	}

	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
	if (!card)
		return -ENOMEM;

	if (pdata->obsolete_card_names) {
		card->name = "avs_max98927";
	} else {
		card->driver_name = "avs_max98927";

Annotation

Implementation Notes