drivers/gpu/drm/sysfb/drm_sysfb.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/sysfb/drm_sysfb.c

Extension

.c

Size

1434 bytes

Lines

60

Domain

Driver Families

Bucket

drivers/gpu

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/export.h
• linux/limits.h
• linux/minmax.h
• linux/module.h
• drm/drm_print.h
• drm_sysfb_helper.h

Detected Declarations

• function drm_sysfb_get_validated_int
• function drm_sysfb_get_validated_int0
• export drm_sysfb_get_validated_int
• export drm_sysfb_get_validated_int0
• export drm_sysfb_get_format

Annotated Snippet

if (pixel_format_equal(pixel, &f->pixel)) {
			format = drm_format_info(f->fourcc);
			break;
		}
	}

	if (!format)
		drm_warn(dev, "No compatible color format found\n");

	return format;
}
EXPORT_SYMBOL(drm_sysfb_get_format);

MODULE_DESCRIPTION("Helpers for DRM sysfb drivers");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/export.h`, `linux/limits.h`, `linux/minmax.h`, `linux/module.h`, `drm/drm_print.h`, `drm_sysfb_helper.h`.
• Detected declarations: `function drm_sysfb_get_validated_int`, `function drm_sysfb_get_validated_int0`, `export drm_sysfb_get_validated_int`, `export drm_sysfb_get_validated_int0`, `export drm_sysfb_get_format`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: integration 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.