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

File Facts

System

Linux kernel

Corpus path

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

Extension

.h

Size

2032 bytes

Lines

66

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

• linux/mutex.h
• rcar_du_plane.h

Detected Declarations

• struct rcar_du_device
• struct rcar_du_group

Annotated Snippet

struct rcar_du_group {
	struct rcar_du_device *dev;
	unsigned int mmio_offset;
	unsigned int index;

	unsigned int channels_mask;
	unsigned int cmms_mask;
	unsigned int num_crtcs;
	unsigned int use_count;
	unsigned int used_crtcs;

	struct mutex lock;
	unsigned int dptsr_planes;

	unsigned int num_planes;
	struct rcar_du_plane planes[RCAR_DU_NUM_KMS_PLANES];
	bool need_restart;
};

u32 rcar_du_group_read(struct rcar_du_group *rgrp, u32 reg);
void rcar_du_group_write(struct rcar_du_group *rgrp, u32 reg, u32 data);

int rcar_du_group_get(struct rcar_du_group *rgrp);
void rcar_du_group_put(struct rcar_du_group *rgrp);
void rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start);
void rcar_du_group_restart(struct rcar_du_group *rgrp);
int rcar_du_group_set_routing(struct rcar_du_group *rgrp);

int rcar_du_set_dpad0_vsp1_routing(struct rcar_du_device *rcdu);

#endif /* __RCAR_DU_GROUP_H__ */

Annotation

• Immediate include surface: `linux/mutex.h`, `rcar_du_plane.h`.
• Detected declarations: `struct rcar_du_device`, `struct rcar_du_group`.
• 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.