sound/usb/power.h

File Facts

System

Linux kernel

Corpus path

sound/usb/power.h

Extension

.h

Size

807 bytes

Lines

29

Domain

Driver Families

Bucket

sound/usb

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

• No C-style include directives detected by the generator.

Detected Declarations

• struct snd_usb_power_domain

Annotated Snippet

struct snd_usb_power_domain {
	int pd_id;              /* UAC3 Power Domain ID */
	int pd_d1d0_rec;        /* D1 to D0 recovery time */
	int pd_d2d0_rec;        /* D2 to D0 recovery time */
	struct usb_host_interface *ctrl_iface; /* Control interface */
};

enum {
	UAC3_PD_STATE_D0,
	UAC3_PD_STATE_D1,
	UAC3_PD_STATE_D2,
};

int snd_usb_power_domain_set(struct snd_usb_audio *chip,
			     struct snd_usb_power_domain *pd,
			     unsigned char state);
struct snd_usb_power_domain *
snd_usb_find_power_domain(struct usb_host_interface *ctrl_iface,
			  unsigned char id);

int snd_usb_autoresume(struct snd_usb_audio *chip);
void snd_usb_autosuspend(struct snd_usb_audio *chip);

#endif /* __USBAUDIO_POWER_H */

Annotation

• Detected declarations: `struct snd_usb_power_domain`.
• Atlas domain: Driver Families / sound/usb.
• 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.