drivers/media/i2c/gc2145.c

Source file repositories/reference/linux-study-clean/drivers/media/i2c/gc2145.c

File Facts

System: Linux kernel
Corpus path: drivers/media/i2c/gc2145.c
Extension: .c
Size: 49704 bytes
Lines: 1485
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.
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/delay.h
linux/gpio/consumer.h
linux/i2c.h
linux/module.h
linux/pm_runtime.h
linux/regulator/consumer.h
linux/units.h
media/mipi-csi2.h
media/v4l2-cci.h
media/v4l2-ctrls.h
media/v4l2-device.h
media/v4l2-fwnode.h
media/v4l2-mediabus.h

Detected Declarations

struct gc2145_mode
struct gc2145_format
struct gc2145_ctrls
struct gc2145
function gc2145_get_format_code
function gc2145_update_pad_format
function gc2145_init_state
function gc2145_get_selection
function gc2145_enum_mbus_code
function gc2145_enum_frame_size
function gc2145_set_pad_format
function gc2145_config_mipi_mode
function gc2145_enable_streams
function gc2145_disable_streams
function gc2145_power_on
function gc2145_power_off
function gc2145_get_regulators
function gc2145_identify_module
function gc2145_set_ctrl_test_pattern
function gc2145_s_ctrl
function gc2145_init_controls
function gc2145_check_hwcfg
function gc2145_probe
function gc2145_remove

Annotated Snippet

struct gc2145_mode {
	unsigned int width;
	unsigned int height;
	const struct cci_reg_sequence *reg_seq;
	size_t reg_seq_size;
	unsigned long pixel_rate;
	struct v4l2_rect crop;
	unsigned int hblank;
	unsigned int vblank;
	unsigned int link_freq_index;
};

#define GC2145_DEFAULT_EXPOSURE	0x04e2
#define GC2145_DEFAULT_GLOBAL_GAIN	0x55
static const struct cci_reg_sequence gc2145_common_regs[] = {
	{GC2145_REG_PAGE_SELECT, 0x00},
	/* SH Delay */
	{CCI_REG8(0x12), 0x2e},
	/* Flip */
	{GC2145_REG_ANALOG_MODE1, 0x14},
	/* Analog Conf */
	{CCI_REG8(0x18), 0x22}, {CCI_REG8(0x19), 0x0e}, {CCI_REG8(0x1a), 0x01},
	{CCI_REG8(0x1b), 0x4b}, {CCI_REG8(0x1c), 0x07}, {CCI_REG8(0x1d), 0x10},
	{CCI_REG8(0x1e), 0x88}, {CCI_REG8(0x1f), 0x78}, {CCI_REG8(0x20), 0x03},
	{CCI_REG8(0x21), 0x40}, {CCI_REG8(0x22), 0xa0}, {CCI_REG8(0x24), 0x16},
	{CCI_REG8(0x25), 0x01}, {CCI_REG8(0x26), 0x10}, {CCI_REG8(0x2d), 0x60},
	{CCI_REG8(0x30), 0x01}, {CCI_REG8(0x31), 0x90}, {CCI_REG8(0x33), 0x06},
	{CCI_REG8(0x34), 0x01},
	/* ISP related */
	{CCI_REG8(0x80), 0x7f}, {CCI_REG8(0x81), 0x26}, {CCI_REG8(0x82), 0xfa},
	{CCI_REG8(0x83), 0x00}, {CCI_REG8(0x84), 0x02}, {CCI_REG8(0x86), 0x02},
	{CCI_REG8(0x88), 0x03},
	{GC2145_REG_BYPASS_MODE, 0x03},
	{CCI_REG8(0x85), 0x08}, {CCI_REG8(0x8a), 0x00}, {CCI_REG8(0x8b), 0x00},
	{GC2145_REG_GLOBAL_GAIN, GC2145_DEFAULT_GLOBAL_GAIN},
	{CCI_REG8(0xc3), 0x00}, {CCI_REG8(0xc4), 0x80}, {CCI_REG8(0xc5), 0x90},
	{CCI_REG8(0xc6), 0x3b}, {CCI_REG8(0xc7), 0x46},
	/* BLK */
	{GC2145_REG_PAGE_SELECT, 0x00},
	{CCI_REG8(0x40), 0x42}, {CCI_REG8(0x41), 0x00}, {CCI_REG8(0x43), 0x5b},
	{CCI_REG8(0x5e), 0x00}, {CCI_REG8(0x5f), 0x00}, {CCI_REG8(0x60), 0x00},
	{CCI_REG8(0x61), 0x00}, {CCI_REG8(0x62), 0x00}, {CCI_REG8(0x63), 0x00},
	{CCI_REG8(0x64), 0x00}, {CCI_REG8(0x65), 0x00}, {CCI_REG8(0x66), 0x20},
	{CCI_REG8(0x67), 0x20}, {CCI_REG8(0x68), 0x20}, {CCI_REG8(0x69), 0x20},
	{CCI_REG8(0x76), 0x00}, {CCI_REG8(0x6a), 0x08}, {CCI_REG8(0x6b), 0x08},
	{CCI_REG8(0x6c), 0x08}, {CCI_REG8(0x6d), 0x08}, {CCI_REG8(0x6e), 0x08},
	{CCI_REG8(0x6f), 0x08}, {CCI_REG8(0x70), 0x08}, {CCI_REG8(0x71), 0x08},
	{CCI_REG8(0x76), 0x00}, {CCI_REG8(0x72), 0xf0}, {CCI_REG8(0x7e), 0x3c},
	{CCI_REG8(0x7f), 0x00},
	{GC2145_REG_PAGE_SELECT, 0x02},
	{CCI_REG8(0x48), 0x15}, {CCI_REG8(0x49), 0x00}, {CCI_REG8(0x4b), 0x0b},
	/* AEC */
	{GC2145_REG_PAGE_SELECT, 0x00},
	{GC2145_REG_EXPOSURE, GC2145_DEFAULT_EXPOSURE},
	{GC2145_REG_PAGE_SELECT, 0x01},
	{CCI_REG8(0x01), 0x04}, {CCI_REG8(0x02), 0xc0}, {CCI_REG8(0x03), 0x04},
	{CCI_REG8(0x04), 0x90}, {CCI_REG8(0x05), 0x30}, {CCI_REG8(0x06), 0x90},
	{CCI_REG8(0x07), 0x30}, {CCI_REG8(0x08), 0x80}, {CCI_REG8(0x09), 0x00},
	{CCI_REG8(0x0a), 0x82}, {CCI_REG8(0x0b), 0x11}, {CCI_REG8(0x0c), 0x10},
	{CCI_REG8(0x11), 0x10}, {CCI_REG8(0x13), 0x7b}, {CCI_REG8(0x17), 0x00},
	{CCI_REG8(0x1c), 0x11}, {CCI_REG8(0x1e), 0x61}, {CCI_REG8(0x1f), 0x35},
	{CCI_REG8(0x20), 0x40}, {CCI_REG8(0x22), 0x40}, {CCI_REG8(0x23), 0x20},
	{GC2145_REG_PAGE_SELECT, 0x02},
	{CCI_REG8(0x0f), 0x04},
	{GC2145_REG_PAGE_SELECT, 0x01},
	{CCI_REG8(0x12), 0x35}, {CCI_REG8(0x15), 0xb0}, {CCI_REG8(0x10), 0x31},
	{CCI_REG8(0x3e), 0x28}, {CCI_REG8(0x3f), 0xb0}, {CCI_REG8(0x40), 0x90},
	{CCI_REG8(0x41), 0x0f},
	/* INTPEE */
	{GC2145_REG_PAGE_SELECT, 0x02},
	{CCI_REG8(0x90), 0x6c}, {CCI_REG8(0x91), 0x03}, {CCI_REG8(0x92), 0xcb},
	{CCI_REG8(0x94), 0x33}, {CCI_REG8(0x95), 0x84}, {CCI_REG8(0x97), 0x65},
	{CCI_REG8(0xa2), 0x11},
	/* DNDD */
	{GC2145_REG_PAGE_SELECT, 0x02},
	{CCI_REG8(0x80), 0xc1}, {CCI_REG8(0x81), 0x08}, {CCI_REG8(0x82), 0x05},
	{CCI_REG8(0x83), 0x08}, {CCI_REG8(0x84), 0x0a}, {CCI_REG8(0x86), 0xf0},
	{CCI_REG8(0x87), 0x50}, {CCI_REG8(0x88), 0x15}, {CCI_REG8(0x89), 0xb0},
	{CCI_REG8(0x8a), 0x30}, {CCI_REG8(0x8b), 0x10},
	/* ASDE */
	{GC2145_REG_PAGE_SELECT, 0x01},
	{CCI_REG8(0x21), 0x04},
	{GC2145_REG_PAGE_SELECT, 0x02},
	{CCI_REG8(0xa3), 0x50}, {CCI_REG8(0xa4), 0x20}, {CCI_REG8(0xa5), 0x40},
	{CCI_REG8(0xa6), 0x80}, {CCI_REG8(0xab), 0x40}, {CCI_REG8(0xae), 0x0c},
	{CCI_REG8(0xb3), 0x46}, {CCI_REG8(0xb4), 0x64}, {CCI_REG8(0xb6), 0x38},
	{CCI_REG8(0xb7), 0x01}, {CCI_REG8(0xb9), 0x2b}, {CCI_REG8(0x3c), 0x04},
	{CCI_REG8(0x3d), 0x15}, {CCI_REG8(0x4b), 0x06}, {CCI_REG8(0x4c), 0x20},
	/* Gamma */
	{GC2145_REG_PAGE_SELECT, 0x02},

Annotation

Immediate include surface: `linux/clk.h`, `linux/delay.h`, `linux/gpio/consumer.h`, `linux/i2c.h`, `linux/module.h`, `linux/pm_runtime.h`, `linux/regulator/consumer.h`, `linux/units.h`.
Detected declarations: `struct gc2145_mode`, `struct gc2145_format`, `struct gc2145_ctrls`, `struct gc2145`, `function gc2145_get_format_code`, `function gc2145_update_pad_format`, `function gc2145_init_state`, `function gc2145_get_selection`, `function gc2145_enum_mbus_code`, `function gc2145_enum_frame_size`.
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.