drivers/gpu/drm/renesas/rcar-du/rcar_du_writeback.h

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/renesas/rcar-du/rcar_du_writeback.h

Extension

.h

Size

997 bytes

Lines

40

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

• drm/drm_plane.h

Detected Declarations

• struct rcar_du_crtc
• struct rcar_du_device
• struct vsp1_du_atomic_pipe_config
• function rcar_du_writeback_init
• function rcar_du_writeback_setup

Annotated Snippet

#ifndef __RCAR_DU_WRITEBACK_H__
#define __RCAR_DU_WRITEBACK_H__

#include <drm/drm_plane.h>

struct rcar_du_crtc;
struct rcar_du_device;
struct vsp1_du_atomic_pipe_config;

#ifdef CONFIG_DRM_RCAR_WRITEBACK
int rcar_du_writeback_init(struct rcar_du_device *rcdu,
			   struct rcar_du_crtc *rcrtc);
void rcar_du_writeback_setup(struct rcar_du_crtc *rcrtc,
			     struct vsp1_du_writeback_config *cfg);
void rcar_du_writeback_complete(struct rcar_du_crtc *rcrtc);
#else
static inline int rcar_du_writeback_init(struct rcar_du_device *rcdu,
					 struct rcar_du_crtc *rcrtc)
{
	return -ENXIO;
}
static inline void
rcar_du_writeback_setup(struct rcar_du_crtc *rcrtc,
			struct vsp1_du_writeback_config *cfg)
{
}
static inline void rcar_du_writeback_complete(struct rcar_du_crtc *rcrtc)
{
}
#endif

#endif /* __RCAR_DU_WRITEBACK_H__ */

Annotation

• Immediate include surface: `drm/drm_plane.h`.
• Detected declarations: `struct rcar_du_crtc`, `struct rcar_du_device`, `struct vsp1_du_atomic_pipe_config`, `function rcar_du_writeback_init`, `function rcar_du_writeback_setup`.
• 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.