drivers/media/platform/amphion/vpu_v4l2.h

File Facts

System

Linux kernel

Corpus path

drivers/media/platform/amphion/vpu_v4l2.h

Extension

.h

Size

1667 bytes

Lines

43

Domain

Driver Families

Bucket

drivers/media

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/videodev2.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef _AMPHION_VPU_V4L2_H
#define _AMPHION_VPU_V4L2_H

#include <linux/videodev2.h>

void vpu_inst_lock(struct vpu_inst *inst);
void vpu_inst_unlock(struct vpu_inst *inst);
void vpu_set_buffer_state(struct vb2_v4l2_buffer *vbuf, unsigned int state);
unsigned int vpu_get_buffer_state(struct vb2_v4l2_buffer *vbuf);
void vpu_set_buffer_average_qp(struct vb2_v4l2_buffer *vbuf, u32 qp);

int vpu_v4l2_open(struct file *file, struct vpu_inst *inst);
int vpu_v4l2_close(struct file *file);

u32 vpu_get_fmt_plane_size(struct vpu_format *fmt, u32 plane_no);
int vpu_try_fmt_common(struct vpu_inst *inst, struct v4l2_format *f, struct vpu_format *fmt);
int vpu_process_output_buffer(struct vpu_inst *inst);
int vpu_process_capture_buffer(struct vpu_inst *inst);
struct vb2_v4l2_buffer *vpu_next_src_buf(struct vpu_inst *inst);
void vpu_skip_frame(struct vpu_inst *inst, int count);
struct vb2_v4l2_buffer *vpu_find_buf_by_sequence(struct vpu_inst *inst, u32 type, u32 sequence);
struct vb2_v4l2_buffer *vpu_find_buf_by_idx(struct vpu_inst *inst, u32 type, u32 idx);
void vpu_v4l2_set_error(struct vpu_inst *inst);
int vpu_notify_source_change(struct vpu_inst *inst);
int vpu_set_last_buffer_dequeued(struct vpu_inst *inst, bool eos);
int vpu_get_num_buffers(struct vpu_inst *inst, u32 type);
bool vpu_is_source_empty(struct vpu_inst *inst);

dma_addr_t vpu_get_vb_phy_addr(struct vb2_buffer *vb, u32 plane_no);
static inline struct vpu_format *vpu_get_format(struct vpu_inst *inst, u32 type)
{
	if (V4L2_TYPE_IS_OUTPUT(type))
		return &inst->out_format;
	else
		return &inst->cap_format;
}
#endif

Annotation

• Immediate include surface: `linux/videodev2.h`.
• Atlas domain: Driver Families / drivers/media.
• 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.