drivers/media/i2c/ov9734.c

File Facts

System

Linux kernel

Corpus path

drivers/media/i2c/ov9734.c

Extension

.c

Size

23492 bytes

Lines

995

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/acpi.h
• linux/clk.h
• linux/delay.h
• linux/i2c.h
• linux/module.h
• linux/pm_runtime.h
• linux/unaligned.h
• media/v4l2-ctrls.h
• media/v4l2-device.h
• media/v4l2-fwnode.h

Detected Declarations

• struct ov9734_reg
• struct ov9734_reg_list
• struct ov9734_link_freq_config
• struct ov9734_mode
• struct ov9734
• function to_pixel_rate
• function to_pixels_per_line
• function ov9734_read_reg
• function ov9734_write_reg
• function ov9734_write_reg_list
• function ov9734_update_digital_gain
• function ov9734_test_pattern
• function ov9734_set_ctrl
• function ov9734_init_controls
• function ov9734_update_pad_format
• function ov9734_start_streaming
• function ov9734_stop_streaming
• function ov9734_set_stream
• function ov9734_set_format
• function ov9734_get_format
• function ov9734_enum_mbus_code
• function ov9734_enum_frame_size
• function ov9734_open
• function ov9734_identify_module
• function ov9734_check_hwcfg
• function ov9734_remove
• function ov9734_probe

Annotated Snippet

struct ov9734_reg {
	u16 address;
	u8 val;
};

struct ov9734_reg_list {
	u32 num_of_regs;
	const struct ov9734_reg *regs;
};

struct ov9734_link_freq_config {
	const struct ov9734_reg_list reg_list;
};

struct ov9734_mode {
	/* Frame width in pixels */
	u32 width;

	/* Frame height in pixels */
	u32 height;

	/* Horizontal timining size */
	u32 hts;

	/* Default vertical timining size */
	u32 vts_def;

	/* Min vertical timining size */
	u32 vts_min;

	/* Link frequency needed for this resolution */
	u32 link_freq_index;

	/* Sensor register settings for this resolution */
	const struct ov9734_reg_list reg_list;
};

static const struct ov9734_reg mipi_data_rate_360mbps[] = {
	{0x3030, 0x19},
	{0x3080, 0x02},
	{0x3081, 0x4b},
	{0x3082, 0x04},
	{0x3083, 0x00},
	{0x3084, 0x02},
	{0x3085, 0x01},
	{0x3086, 0x01},
	{0x3089, 0x01},
	{0x308a, 0x00},
	{0x301e, 0x15},
	{0x3103, 0x01},
};

static const struct ov9734_reg mode_1296x734_regs[] = {
	{0x3001, 0x00},
	{0x3002, 0x00},
	{0x3007, 0x00},
	{0x3010, 0x00},
	{0x3011, 0x08},
	{0x3014, 0x22},
	{0x3600, 0x55},
	{0x3601, 0x02},
	{0x3605, 0x22},
	{0x3611, 0xe7},
	{0x3654, 0x10},
	{0x3655, 0x77},
	{0x3656, 0x77},
	{0x3657, 0x07},
	{0x3658, 0x22},
	{0x3659, 0x22},
	{0x365a, 0x02},
	{0x3784, 0x05},
	{0x3785, 0x55},
	{0x37c0, 0x07},
	{0x3800, 0x00},
	{0x3801, 0x04},
	{0x3802, 0x00},
	{0x3803, 0x04},
	{0x3804, 0x05},
	{0x3805, 0x0b},
	{0x3806, 0x02},
	{0x3807, 0xdb},
	{0x3808, 0x05},
	{0x3809, 0x00},
	{0x380a, 0x02},
	{0x380b, 0xd0},
	{0x380c, 0x05},
	{0x380d, 0xc6},
	{0x380e, 0x03},
	{0x380f, 0x22},
	{0x3810, 0x00},

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/clk.h`, `linux/delay.h`, `linux/i2c.h`, `linux/module.h`, `linux/pm_runtime.h`, `linux/unaligned.h`, `media/v4l2-ctrls.h`.
• Detected declarations: `struct ov9734_reg`, `struct ov9734_reg_list`, `struct ov9734_link_freq_config`, `struct ov9734_mode`, `struct ov9734`, `function to_pixel_rate`, `function to_pixels_per_line`, `function ov9734_read_reg`, `function ov9734_write_reg`, `function ov9734_write_reg_list`.
• 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.