drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia.h

Extension

.h

Size

1787 bytes

Lines

48

Domain

Driver Families

Bucket

drivers/gpu

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

• link_service.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef __DC_LINK_DPIA_H__
#define __DC_LINK_DPIA_H__

#include "link_service.h"

/* Read tunneling device capability from DPCD and update link capability
 * accordingly.
 */
enum dc_status dpcd_get_tunneling_device_data(struct dc_link *link);

/* Query hot plug status of USB4 DP tunnel.
 * Returns true if HPD high.
 */
bool dpia_query_hpd_status(struct dc_link *link);

/* Decide the DP tunneling settings based on the DPCD capabilities
 */
void link_decide_dp_tunnel_settings(struct dc_stream_state *stream,
			struct dc_tunnel_settings *dp_tunnel_setting);

#endif /* __DC_LINK_DPIA_H__ */

Annotation

• Immediate include surface: `link_service.h`.
• Atlas domain: Driver Families / drivers/gpu.
• 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.