drivers/media/pci/cx18/cx18-audio.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/cx18/cx18-audio.c

Extension

.c

Size

1905 bytes

Lines

79

Domain

Driver Families

Bucket

drivers/media

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.

• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• cx18-driver.h
• cx18-io.h
• cx18-cards.h
• cx18-audio.h

Detected Declarations

• function Copyright

Annotated Snippet

switch (in->audio_input) {
		case CX18_AV_AUDIO_SERIAL1:
			u |= CX18_AI1_MUX_843_I2S;
			break;
		case CX18_AV_AUDIO_SERIAL2:
			u |= CX18_AI1_MUX_843_I2S;
			break;
		default:
			u |= CX18_AI1_MUX_I2S1;
			break;
		}
		cx18_write_reg_expect(cx, u | 0xb00, CX18_AUDIO_ENABLE,
				      u, CX18_AI1_MUX_MASK);
	}
	cx18_write_reg_expect(cx, v | 0xb00, CX18_AUDIO_ENABLE,
			      v, CX18_AI1_MUX_MASK);
	return 0;
}

Annotation

• Immediate include surface: `cx18-driver.h`, `cx18-io.h`, `cx18-cards.h`, `cx18-audio.h`.
• Detected declarations: `function Copyright`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source 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.