drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c

Extension

.c

Size

6531 bytes

Lines

246

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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• dmub_abm.h
• dmub_abm_lcd.h
• dc.h
• core_types.h
• dmub_cmd.h
• dc_dmub_srv.h
• dmub/dmub_srv.h

Detected Declarations

• function files
• function dmub_abm_init_ex
• function dmub_abm_get_current_backlight_ex
• function dmub_abm_get_target_backlight_ex
• function dmub_abm_set_level_ex
• function dmub_abm_init_config_ex
• function dmub_abm_set_pause_ex
• function dmub_abm_save_restore_ex
• function dmub_abm_set_pipe_ex
• function dmub_abm_set_backlight_level_pwm_ex
• function dmub_abm_construct
• function dmub_abm_destroy

Annotated Snippet

if (abm_dce == NULL) {
			BREAK_TO_DEBUGGER();
			return NULL;
		}

		dmub_abm_construct(abm_dce, ctx, regs, abm_shift, abm_mask);

		return &abm_dce->base;
	}
	return NULL;
}

void dmub_abm_destroy(struct abm **abm)
{
	struct dce_abm *abm_dce = TO_DMUB_ABM(*abm);

	kfree(abm_dce);
	*abm = NULL;
}

Annotation

• Immediate include surface: `dmub_abm.h`, `dmub_abm_lcd.h`, `dc.h`, `core_types.h`, `dmub_cmd.h`, `dc_dmub_srv.h`, `dmub/dmub_srv.h`.
• Detected declarations: `function files`, `function dmub_abm_init_ex`, `function dmub_abm_get_current_backlight_ex`, `function dmub_abm_get_target_backlight_ex`, `function dmub_abm_set_level_ex`, `function dmub_abm_init_config_ex`, `function dmub_abm_set_pause_ex`, `function dmub_abm_save_restore_ex`, `function dmub_abm_set_pipe_ex`, `function dmub_abm_set_backlight_level_pwm_ex`.
• 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.