drivers/media/i2c/ov5640.c

Source file repositories/reference/linux-study-clean/drivers/media/i2c/ov5640.c

File Facts

System: Linux kernel
Corpus path: drivers/media/i2c/ov5640.c
Extension: .c
Size: 104705 bytes
Lines: 4028
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.
Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
Allocates kernel memory; connect allocation flags and lifetime to context constraints.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/clk.h
linux/clk-provider.h
linux/clkdev.h
linux/ctype.h
linux/delay.h
linux/device.h
linux/gpio/consumer.h
linux/i2c.h
linux/init.h
linux/mod_devicetable.h
linux/module.h
linux/pm_runtime.h
linux/regulator/consumer.h
linux/slab.h
linux/types.h
media/v4l2-async.h
media/v4l2-ctrls.h
media/v4l2-device.h
media/v4l2-event.h
media/v4l2-fwnode.h
media/v4l2-subdev.h

Detected Declarations

struct ov5640_pixfmt
struct reg_value
struct ov5640_timings
struct ov5640_mode_info
struct ov5640_ctrls
struct ov5640_dev
enum ov5640_mode_id
enum ov5640_frame_rate
enum ov5640_pixel_rate_id
enum ov5640_format_mux
enum ov5640_downsize_mode
function ov5640_is_csi2
function ov5640_formats
function ov5640_code_to_pixfmt
function ov5640_code_to_bpp
function ov5640_timings
function ov5640_init_slave_id
function ov5640_write_reg
function ov5640_read_reg
function ov5640_read_reg16
function ov5640_write_reg16
function ov5640_mod_reg
function ov5640_compute_sys_clk
function ov5640_calc_sys_clk
function ov5640_set_mipi_pclk
function ov5640_calc_pixel_rate
function ov5640_calc_pclk
function ov5640_set_dvp_pclk
function ov5640_set_jpeg_timings
function ov5640_set_timings
function ov5640_load_regs
function ov5640_set_autoexposure
function ov5640_get_exposure
function ov5640_set_exposure
function ov5640_get_gain
function ov5640_set_gain
function ov5640_set_autogain
function ov5640_set_stream_dvp
function ov5640_set_stream_mipi
function ov5640_get_sysclk
function ov5640_set_night_mode
function ov5640_get_hts
function ov5640_get_vts
function ov5640_set_vts
function ov5640_get_light_freq
function ov5640_set_bandingfilter
function ov5640_set_ae_target
function ov5640_get_binning

Annotated Snippet

struct ov5640_pixfmt {
	u32 code;
	u32 colorspace;
	u8 bpp;
	u8 ctrl00;
	enum ov5640_format_mux mux;
};

static const struct ov5640_pixfmt ov5640_dvp_formats[] = {
	{
		/* YUV422, YUYV */
		.code		= MEDIA_BUS_FMT_JPEG_1X8,
		.colorspace	= V4L2_COLORSPACE_JPEG,
		.bpp		= 16,
		.ctrl00		= 0x30,
		.mux		= OV5640_FMT_MUX_YUV422,
	}, {
		/* YUV422, UYVY */
		.code		= MEDIA_BUS_FMT_UYVY8_2X8,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 16,
		.ctrl00		= 0x3f,
		.mux		= OV5640_FMT_MUX_YUV422,
	}, {
		/* YUV422, YUYV */
		.code		= MEDIA_BUS_FMT_YUYV8_2X8,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 16,
		.ctrl00		= 0x30,
		.mux		= OV5640_FMT_MUX_YUV422,
	}, {
		/* RGB565 {g[2:0],b[4:0]},{r[4:0],g[5:3]} */
		.code		= MEDIA_BUS_FMT_RGB565_2X8_LE,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 16,
		.ctrl00		= 0x6f,
		.mux		= OV5640_FMT_MUX_RGB,
	}, {
		/* RGB565 {r[4:0],g[5:3]},{g[2:0],b[4:0]} */
		.code		= MEDIA_BUS_FMT_RGB565_2X8_BE,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 16,
		.ctrl00		= 0x61,
		.mux		= OV5640_FMT_MUX_RGB,
	}, {
		/* Raw, BGBG... / GRGR... */
		.code		= MEDIA_BUS_FMT_SBGGR8_1X8,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 8,
		.ctrl00		= 0x00,
		.mux		= OV5640_FMT_MUX_RAW_DPC,
	}, {
		/* Raw bayer, GBGB... / RGRG... */
		.code		= MEDIA_BUS_FMT_SGBRG8_1X8,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 8,
		.ctrl00		= 0x01,
		.mux		= OV5640_FMT_MUX_RAW_DPC,
	}, {
		/* Raw bayer, GRGR... / BGBG... */
		.code		= MEDIA_BUS_FMT_SGRBG8_1X8,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 8,
		.ctrl00		= 0x02,
		.mux		= OV5640_FMT_MUX_RAW_DPC,
	}, {
		/* Raw bayer, RGRG... / GBGB... */
		.code		= MEDIA_BUS_FMT_SRGGB8_1X8,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 8,
		.ctrl00		= 0x03,
		.mux		= OV5640_FMT_MUX_RAW_DPC,
	},
	{ /* sentinel */ }
};

static const struct ov5640_pixfmt ov5640_csi2_formats[] = {
	{
		/* YUV422, YUYV */
		.code		= MEDIA_BUS_FMT_JPEG_1X8,
		.colorspace	= V4L2_COLORSPACE_JPEG,
		.bpp		= 16,
		.ctrl00		= 0x30,
		.mux		= OV5640_FMT_MUX_YUV422,
	}, {
		/* YUV422, UYVY */
		.code		= MEDIA_BUS_FMT_UYVY8_1X16,
		.colorspace	= V4L2_COLORSPACE_SRGB,
		.bpp		= 16,
		.ctrl00		= 0x3f,

Annotation

Immediate include surface: `linux/clk.h`, `linux/clk-provider.h`, `linux/clkdev.h`, `linux/ctype.h`, `linux/delay.h`, `linux/device.h`, `linux/gpio/consumer.h`, `linux/i2c.h`.
Detected declarations: `struct ov5640_pixfmt`, `struct reg_value`, `struct ov5640_timings`, `struct ov5640_mode_info`, `struct ov5640_ctrls`, `struct ov5640_dev`, `enum ov5640_mode_id`, `enum ov5640_frame_rate`, `enum ov5640_pixel_rate_id`, `enum ov5640_format_mux`.
Atlas domain: Driver Families / drivers/media.
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.