drivers/media/platform/raspberrypi/rp1-cfe/csi2.h

Source file repositories/reference/linux-study-clean/drivers/media/platform/raspberrypi/rp1-cfe/csi2.h

File Facts

System: Linux kernel
Corpus path: drivers/media/platform/raspberrypi/rp1-cfe/csi2.h
Extension: .h
Size: 2283 bytes
Lines: 90
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/debugfs.h
linux/io.h
linux/types.h
media/v4l2-device.h
media/v4l2-subdev.h
dphy.h

Detected Declarations

struct csi2_device
enum csi2_mode
enum csi2_compression_mode
enum discards_table_index

Annotated Snippet

struct csi2_device {
	/* Parent V4l2 device */
	struct v4l2_device *v4l2_dev;

	void __iomem *base;

	struct dphy_data dphy;

	enum v4l2_mbus_type bus_type;
	unsigned int bus_flags;
	unsigned int num_lines[CSI2_NUM_CHANNELS];

	struct media_pad pad[CSI2_NUM_PADS];
	struct v4l2_subdev sd;

	/* lock for csi2 errors counters */
	spinlock_t errors_lock;
	u32 overflows;
	u32 discards_table[DISCARDS_TABLE_NUM_VCS][DISCARDS_TABLE_NUM_ENTRIES];
	u32 discards_dt_table[DISCARDS_TABLE_NUM_ENTRIES];
};

void csi2_isr(struct csi2_device *csi2, bool *sof, bool *eof);
void csi2_set_buffer(struct csi2_device *csi2, unsigned int channel,
		     dma_addr_t dmaaddr, unsigned int stride,
		     unsigned int size);
void csi2_set_compression(struct csi2_device *csi2, unsigned int channel,
			  enum csi2_compression_mode mode, unsigned int shift,
			  unsigned int offset);
void csi2_start_channel(struct csi2_device *csi2, unsigned int channel,
			enum csi2_mode mode, bool auto_arm,
			bool pack_bytes, unsigned int width,
			unsigned int height, u8 vc, u8 dt);
void csi2_stop_channel(struct csi2_device *csi2, unsigned int channel);
void csi2_open_rx(struct csi2_device *csi2);
void csi2_close_rx(struct csi2_device *csi2);
int csi2_init(struct csi2_device *csi2, struct dentry *debugfs);
void csi2_uninit(struct csi2_device *csi2);

#endif

Annotation

Immediate include surface: `linux/debugfs.h`, `linux/io.h`, `linux/types.h`, `media/v4l2-device.h`, `media/v4l2-subdev.h`, `dphy.h`.
Detected declarations: `struct csi2_device`, `enum csi2_mode`, `enum csi2_compression_mode`, `enum discards_table_index`.
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.