drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c

Extension

.c

Size

4972 bytes

Lines

178

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_hpd.h
• gpio_service_interface.h

Detected Declarations

• function files
• function link_enable_hpd
• function link_disable_hpd
• function link_enable_hpd_filter
• function program_hpd_filter
• function get_hpd_line

Annotated Snippet

switch (dal_irq_get_source(hpd)) {
		case DC_IRQ_SOURCE_HPD1:
			hpd_id = HPD_SOURCEID1;
		break;
		case DC_IRQ_SOURCE_HPD2:
			hpd_id = HPD_SOURCEID2;
		break;
		case DC_IRQ_SOURCE_HPD3:
			hpd_id = HPD_SOURCEID3;
		break;
		case DC_IRQ_SOURCE_HPD4:
			hpd_id = HPD_SOURCEID4;
		break;
		case DC_IRQ_SOURCE_HPD5:
			hpd_id = HPD_SOURCEID5;
		break;
		case DC_IRQ_SOURCE_HPD6:
			hpd_id = HPD_SOURCEID6;
		break;
		default:
			BREAK_TO_DEBUGGER();
		break;
		}

		dal_gpio_destroy_irq(&hpd);
	}

	return hpd_id;
}

Annotation

• Immediate include surface: `link_hpd.h`, `gpio_service_interface.h`.
• Detected declarations: `function files`, `function link_enable_hpd`, `function link_disable_hpd`, `function link_enable_hpd_filter`, `function program_hpd_filter`, `function get_hpd_line`.
• 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.