sound/soc/sdw_utils/soc_sdw_cs_amp.c

File Facts

System

Linux kernel

Corpus path

sound/soc/sdw_utils/soc_sdw_cs_amp.c

Extension

.c

Size

3659 bytes

Lines

126

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.

• 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/device.h
• linux/errno.h
• sound/soc.h
• sound/soc-acpi.h
• sound/soc-dai.h
• sound/soc_sdw_utils.h

Detected Declarations

• function asoc_sdw_cs35l56_volume_limit
• function asoc_sdw_cs_spk_rtd_init
• function for_each_rtd_codec_dais
• function asoc_sdw_cs_spk_feedback_rtd_init
• function for_each_rtd_ch_maps
• function asoc_sdw_cs_amp_init

Annotated Snippet

if (ret < 0) {
			dev_err(rtd->card->dev, "Failed to set TDM slot:%d\n", ret);
			return ret;
		}

		ch_slot[ch_map->cpu] += ch_per_amp;
	}

	return 0;
}
EXPORT_SYMBOL_NS(asoc_sdw_cs_spk_feedback_rtd_init, "SND_SOC_SDW_UTILS");

int asoc_sdw_cs_amp_init(struct snd_soc_card *card,
			 struct snd_soc_dai_link *dai_links,
			 struct asoc_sdw_codec_info *info,
			 bool playback)
{
	/* Do init on playback link only. */
	if (!playback)
		return 0;

	info->amp_num++;

	return 0;
}
EXPORT_SYMBOL_NS(asoc_sdw_cs_amp_init, "SND_SOC_SDW_UTILS");

Annotation

• Immediate include surface: `linux/device.h`, `linux/errno.h`, `sound/soc.h`, `sound/soc-acpi.h`, `sound/soc-dai.h`, `sound/soc_sdw_utils.h`.
• Detected declarations: `function asoc_sdw_cs35l56_volume_limit`, `function asoc_sdw_cs_spk_rtd_init`, `function for_each_rtd_codec_dais`, `function asoc_sdw_cs_spk_feedback_rtd_init`, `function for_each_rtd_ch_maps`, `function asoc_sdw_cs_amp_init`.
• Atlas domain: Driver Families / sound/soc.
• Implementation status: integration implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.