drivers/gpu/drm/i915/display/intel_dmc_wl.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/i915/display/intel_dmc_wl.h

Extension

.h

Size

1261 bytes

Lines

42

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h
• linux/workqueue.h
• linux/refcount.h
• intel_display_reg_defs.h

Detected Declarations

• struct intel_display
• struct intel_dmc_wl

Annotated Snippet

struct intel_dmc_wl {
	spinlock_t lock; /* protects enabled, taken, dc_state and refcount */
	bool enabled;
	bool taken;
	refcount_t refcount;
	/*
	 * We are keeping a copy of the enabled DC state because
	 * intel_display.power.domains is protected by a mutex and we do
	 * not want call mutex_lock() in atomic context, where some of
	 * the tracked MMIO operations happen.
	 */
	u32 dc_state;
	struct delayed_work work;
};

void intel_dmc_wl_init(struct intel_display *display);
void intel_dmc_wl_enable(struct intel_display *display, u32 dc_state);
void intel_dmc_wl_disable(struct intel_display *display);
void intel_dmc_wl_flush_release_work(struct intel_display *display);
void intel_dmc_wl_get(struct intel_display *display, intel_reg_t reg);
void intel_dmc_wl_put(struct intel_display *display, intel_reg_t reg);
void intel_dmc_wl_get_noreg(struct intel_display *display);
void intel_dmc_wl_put_noreg(struct intel_display *display);

#endif /* __INTEL_WAKELOCK_H__ */

Annotation

• Immediate include surface: `linux/types.h`, `linux/workqueue.h`, `linux/refcount.h`, `intel_display_reg_defs.h`.
• Detected declarations: `struct intel_display`, `struct intel_dmc_wl`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.