drivers/media/pci/saa7134/saa7134-vbi.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/saa7134/saa7134-vbi.c

Extension

.c

Size

6196 bytes

Lines

209

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• saa7134.h
• saa7134-reg.h
• linux/init.h
• linux/list.h
• linux/module.h
• linux/kernel.h

Detected Declarations

• function task_init
• function buffer_activate
• function buffer_prepare
• function queue_setup
• function buffer_init
• function saa7134_vbi_init1
• function saa7134_vbi_fini
• function saa7134_irq_vbi_done

Annotated Snippet

if ((status & 0x10) == 0x00) {
			dev->vbi_q.curr->top_seen = 1;
			goto done;
		}
		if (!dev->vbi_q.curr->top_seen)
			goto done;

		saa7134_buffer_finish(dev, &dev->vbi_q, VB2_BUF_STATE_DONE);
	}
	saa7134_buffer_next(dev, &dev->vbi_q);

 done:
	spin_unlock(&dev->slock);
}

Annotation

• Immediate include surface: `saa7134.h`, `saa7134-reg.h`, `linux/init.h`, `linux/list.h`, `linux/module.h`, `linux/kernel.h`.
• Detected declarations: `function task_init`, `function buffer_activate`, `function buffer_prepare`, `function queue_setup`, `function buffer_init`, `function saa7134_vbi_init1`, `function saa7134_vbi_fini`, `function saa7134_irq_vbi_done`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.