1000字范文 > android_驱动_qcom_【高通SDM660平台 Android 10.0】(10) --- Camera Sensor lib 与 Kernel Camera Probe 代码分析

android_驱动_qcom_【高通SDM660平台 Android 10.0】(10) --- Camera Sensor lib 与 Kernel Camera Probe 代码分析

时间：2023-07-25 20:45:22

【高通SDM660平台 Android 10.0】Camera Sensor lib 与 Kernel Camera Probe 代码分析

一、libmmcamera_imx258.so 代码分析1.1 struct sensor_lib_t 结构体1.2 imx258_lib.h 头文件分析二、 Kernel Camera Probe 代码分析2.1 msm_sensor_driver_probe() 代码分析2.1.1 创建 /dev/videoX、 /dev/v4l-subdevX 节点

《【高通SDM660平台】(1) — Camera 驱动 Bringup Guide》

《【高通SDM660平台】(2) — Camera Kernel 驱动层代码逻辑分析》

《【高通SDM660平台】(3) — Camera V4L2 驱动层分析》

《【高通SDM660平台】(4) — Camera Init 初始化流程》

《【高通SDM660平台】(5) — Camera Open 流程》

《【高通SDM660平台】(6) — Camera getParameters 及 setParameters 流程》

《【高通SDM660平台】(7) — Camera onPreview 代码流程》

《【高通SDM660平台】(8) — Camera MetaData介绍》

《【高通SDM660平台 Android 10.0】(9) — Qcom Camera Daemon 代码分析》

《【高通SDM660平台 Android 10.0】(10) — Camera Sensor lib 与 Kernel Camera Probe 代码分析》

《【高通SDM660平台】Camera Capture 流程》

《【高通SDM660平台】Camera mm-qcamera-app 代码分析》

在前面《【高通SDM660平台 Android 10.0】Qcom Camera Daemon 代码分析》中，

我们分析了 Camera module_sensor_init() 的整个过程，考虑到篇幅的问题，本文是接module_sensor_init() 继续分析的。

主题如下：

分析 Camera lib 库的代码vendor 下发 CFG_SINIT_PROBE 后，Kernel 中 Camera Probe的流程

好, 开始吧！

一、libmmcamera_imx258.so 代码分析

Sensor LIB 库代码位于/vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/sensor/libs

本文以 imx258 为例。

先来看下imx258_lib.c，其最核心的函数就是sensor_open_lib，

返回sensor_lib_ptr结构体，所有的 Camera 信息，都保存在该结构体中。

@ /vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/sensor/libs/imx258/imx258_lib.c

/**

FUNCTION: sensor_open_libDESCRIPTION: Open sensor library and returns data pointer

**/

void *sensor_open_lib(void)

{

return &sensor_lib_ptr;

} 12345678910

我们来看下sensor_lib_ptr结构体的定义

1.1 struct sensor_lib_t 结构体

@ /vendor/qcom/proprietary/mm-camerasdk/sensor/includes/sensor_lib.htypedef struct {/* sensor slave info */ // 从设备包括，I2C地址、I2C速率、Sensor_id 寄存器地址及Sensor_id 值、上下电的时序及电压值struct camera_sensor_slave_info sensor_slave_info;

/* sensor output settings */

// 包括出图的格式（BAYER / YCbCr）, 连接类型为 MIPI CSI

sensor_output_t sensor_output;

/* sensor output register address */

// 输出寄存器的地址，pclk，及line length pclk 、 frame length lines

struct sensor_output_reg_addr_t output_reg_addr;

/* sensor exposure gain register address */

// 曝光增益

struct sensor_exp_gain_info_t exp_gain_info;

/* sensor aec info */

sensor_aec_data_t aec_info;

/* number of frames to skip after start stream info */

// preview 前丢弃过的帧数

unsigned short sensor_num_frame_skip;

/* number of frames to skip after start HDR stream info */

// HDR 丢弃的帧数

unsigned short sensor_num_HDR_frame_skip;

/* sensor pipeline delay */

// pipeline 帧延时

unsigned int sensor_max_pipeline_frame_delay;

/* sensor lens info */

// sensor line info 信息

sensor_property_t sensor_property;

/* imaging pixel array size info */

// 像素点大小，宽高

sensor_imaging_pixel_array_size pixel_array_size_info;

/* Sensor color level information */

// 颜色等级

sensor_color_level_info color_level_info;

/* sensor port info that consists of cid mask and fourcc mapaping */

sensor_stream_info_array_t sensor_stream_info_array;

/* Sensor Settings */

// 初始化Camera 寄存器配置

struct camera_i2c_reg_setting_array start_settings;

// 关闭Camera 时的寄存器配置

struct camera_i2c_reg_setting_array stop_settings;

struct camera_i2c_reg_setting_array groupon_settings;

struct camera_i2c_reg_setting_array groupoff_settings;

struct camera_i2c_reg_setting_array embedded_data_enable_settings;

struct camera_i2c_reg_setting_array embedded_data_disable_settings;

struct camera_i2c_reg_setting_array aec_enable_settings;

struct camera_i2c_reg_setting_array aec_disable_settings;

struct camera_i2c_reg_setting_array dualcam_master_settings;

struct camera_i2c_reg_setting_array dualcam_slave_settings;

/* sensor test pattern info/

// 测试图信息

sensor_test_info test_pattern_info;

/ sensor effects info */

struct sensor_effect_info effect_info;

/* Sensor Settings Array */

//初始化 Camera 寄存器配置

struct sensor_lib_reg_settings_array init_settings_array;

struct sensor_lib_reg_settings_array res_settings_array;

// 不同辨率的输出信息，xy像素大小，pclk,fps，数据传输速率

struct sensor_lib_out_info_array out_info_array;

// MIPI CSI 信息

struct sensor_csi_params csi_params;

struct sensor_csid_lut_params_array csid_lut_params_array;

struct sensor_lib_crop_params_array crop_params_array;

/* Exposure Info */

sensor_exposure_table_t exposure_func_table;

/* video_hdr mode info*/

struct sensor_lib_meta_data_info_array meta_data_out_info_array;

/* sensor optical black regions */

sensor_optical_black_region_t optical_black_region_info;

/* sensor_capability */

sensor_capability_t sensor_capability;

/* sensor_awb_table_t */

sensor_awb_table_t awb_func_table;

/* sensor_awb_table_t */

sensor_fps_table_t fps_func_table;

/* Parse RDI stats callback function */

sensor_RDI_parser_stats_t parse_RDI_stats;

/* full size info */

sensor_rolloff_config rolloff_config;

/* analog-digital conversion time */

long long adc_readout_time;

/* number of frames to skip for fast AEC use case */

unsigned short sensor_num_fast_aec_frame_skip;

/* add soft delay for sensor settings like exposure, gain …*/

unsigned char app_delay[SENSOR_DELAY_MAX];

/* for noise profile calculation

Tuning team must update with proper values. */

struct sensor_noise_coefficient_t noise_coeff;

/* Flag to be set if any external library are to be loaded */

unsigned char external_library;

sensorlib_pdaf_apis_t sensorlib_pdaf_api;

// PDAF 配轩

pdaf_lib_t pdaf_config;

/* sensor orientation flag */

sensor_orientation_type_t sensor_orientation;

} sensor_lib_t;

1.2 imx258_lib.h 头文件分析

@ /vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/sensor/libs/imx258/imx258_lib.h

/* imx258_lib.h

#ifndefIMX258_LIB_H

#defineIMX258_LIB_H

#include “sensor_lib.h”

#include “eeprom_lib.h”

#include “pdaf_api.h”

#include “pdaf_camif_api.h”

#define SENSOR_MODEL “imx258”

/* IMX258 Regs */

#define IMX258_DIG_GAIN_GR_ADDR 0x020E

#define IMX258_DIG_GAIN_R_ADDR 0x0210

#define IMX258_DIG_GAIN_B_ADDR 0x0212

#define IMX258_DIG_GAIN_GB_ADDR 0x0214

#define IMX258_EXP_RATIO_ADDR 0x0222

#define IMX258_ABS_GAIN_R_WORD_ADDR 0x0B90

#define IMX258_ABS_GAIN_B_WORD_ADDR 0x0B92

/* IMX258 CONSTANTS */

#define IMX258_MAX_INTEGRATION_MARGIN 20

/* STATS DATA TYPE */

#define IMX258_CSI_PD_ISTATS 0x2F

#define IMX258_DATA_PEDESTAL 0x40 /* 10bit value */

#define IMX258_MIN_AGAIN_REG_VAL 0 /* 1.0x/

#define IMX258_MAX_AGAIN_REG_VAL 480 / 16.0x */

#define IMX258_MIN_DGAIN_REG_VAL 256 /* 1.0x/

#define IMX258_MAX_DGAIN_REG_VAL 256 / 1.0x */

#define IMX258_MAX_DGAIN_DECIMATOR 256

/* IMX258 FORMULAS */

#define IMX258_MIN_AGAIN (512 / (512 - IMX258_MIN_AGAIN_REG_VAL))

#define IMX258_MAX_AGAIN (512 / (512 - IMX258_MAX_AGAIN_REG_VAL))

#define IMX258_MIN_DGAIN (IMX258_MIN_DGAIN_REG_VAL / 256)

#define IMX258_MAX_DGAIN (IMX258_MAX_DGAIN_REG_VAL / 256)

#define IMX258_MIN_GAIN IMX258_MIN_AGAIN * IMX258_MIN_DGAIN

#define IMX258_MAX_GAIN IMX258_MAX_AGAIN * IMX258_MAX_DGAIN

/* uncomment FLIP_MIRROR macro to

enable flip and mirror in sensor readout

change bayer pattern

load pdaf flip and mirror header

//#define FLIP_MIRROR

#define START_REG_ARRAY

{

{0x0100, 0x01, 0x00},

}

#define STOP_REG_ARRAY

{

{0x0100, 0x00, 0x00},

}

#define GROUPON_REG_ARRAY

{

{0x0104, 0x01, 0x00},

}

#define GROUPOFF_REG_ARRAY

{

{0x0104, 0x00, 0x00},

}

// 初始化寄存器配置

#define INIT0_REG_ARRAY

{

/* External Clock Settings/

{0x0136, 0x18, 0x00},

{0x0137, 0x00, 0x00},

/ Global Settings */

{0x3051, 0x00, 0x00},

...... //配置一系烈的寄存器

{0x3006, 0x00, 0x00},

{0x3007, 0x00, 0x00},

}

#ifndef FLIP_MIRROR

#define FLIP_MIRROR_SETTING {{0x0101, 0x00, 0x00}}

#else

#define FLIP_MIRROR_SETTING {{0x0101, 0x03, 0x00}}

#endif

// 分辨率0 寄存器配置

#define RES0_REG_ARRAY

{

/* Mode A1: 4208x3120 Full 30fps/

/ Output Format Settings/

{0x0112, 0x0A, 0x00},

{0x0113, 0x0A, 0x00},

...... //配置一系烈的寄存器

{0x0818, 0x00, 0x00},

{0x0819, 0x47, 0x00},

}

// 分辨率1 寄存器配置

#define RES1_REG_ARRAY

{

/ (Reg-10)Mode: Full 16:9 30 fps/

/ Output Format Settings/

{0x0112, 0x0A, 0x00},

{0x0113, 0x0A, 0x00},

/ Clock Settings/

{0x0301, 0x05, 0x00},

{0x0303, 0x02, 0x00},

...... //配置一系烈的寄存器

{0x0818, 0x00, 0x00},

{0x0819, 0x47, 0x00},

}

// 分辨率2 寄存器配置

#define RES2_REG_ARRAY

{

/ Mode: 2100x1560 2x2 binning 30 fps/

/ Output Format Settings/

{0x0112, 0x0A, 0x00},

{0x0113, 0x0A, 0x00},

...... //配置一系烈的寄存器

{0x0819, 0x47, 0x00},

{0x3031, 0x00, 0x00},

}

// 分辨率3 寄存器配置

#define RES3_REG_ARRAY

{

/ Mode: 2100x1176 60 fps/

/ Output Format Settings/

{0x0112, 0x0A, 0x00},

{0x0113, 0x0A, 0x00},

...... //配置一系列的寄存器

{0x0819, 0x47, 0x00},

{0x3031, 0x00, 0x00},

}

// 分辨率4 寄存器配置

#define RES4_REG_ARRAY

{

/ Mode: 1400x784 90 fps*/

/* Output Format Settings/

{0x0112, 0x0A, 0x00},

{0x0113, 0x0A, 0x00},

...... //配置一系列的寄存器

{0x0819, 0x47, 0x00},

{0x3031, 0x00, 0x00},

}

// 分辨率5 寄存器配置

#define RES5_REG_ARRAY

{

/ Mode: 1400x760 120 fps*/

/* Output Format Settings */

{0x0112, 0x0A, 0x00},

{0x0113, 0x0A, 0x00},

...... //配置一系列的寄存器

{0x0819, 0x47, 0x00},

{0x3031, 0x00, 0x00},

}

/* Sensor Handler/

static sensor_lib_t sensor_lib_ptr =

{

.sensor_slave_info =

{

.sensor_name = SENSOR_MODEL, // “imx258”

.slave_addr = 0x20, // 7位地址0x20， 010 0000，对应的8位地址为0100 0000, 0x40

.i2c_freq_mode = SENSOR_I2C_MODE_FAST,

.addr_type = CAMERA_I2C_WORD_ADDR,

.sensor_id_info =

{

.sensor_id_reg_addr = 0x0016,

.sensor_id = 0x0258,

.power_setting_array =

{

.power_setting_a =

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_RESET,

.config_val = GPIO_OUT_LOW,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_VANA,

.config_val = GPIO_OUT_HIGH,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_VREG,

.seq_val = CAMERA_VANA,

.config_val = 0,

.delay = 0,

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_VDIG,

.config_val = GPIO_OUT_HIGH,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_VREG,

.seq_val = CAMERA_VDIG,

.config_val = 0,

.delay = 0,

{

.seq_type = CAMERA_POW_SEQ_VREG,

.seq_val = CAMERA_VIO,

.config_val = 0,

.delay = 0,

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_VAF,

.config_val = GPIO_OUT_HIGH,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_CLK,

.seq_val = CAMERA_MCLK,

.config_val = 24000000,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_RESET,

.config_val = GPIO_OUT_HIGH,

.delay = 12,

.size = 9,

.power_down_setting_a =

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_RESET,

.config_val = GPIO_OUT_LOW,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_CLK,

.seq_val = CAMERA_MCLK,

.config_val = 0,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_VREG,

.seq_val = CAMERA_VIO,

.config_val = 0,

.delay = 0,

{

.seq_type = CAMERA_POW_SEQ_VREG,

.seq_val = CAMERA_VDIG,

.config_val = 0,

.delay = 0,

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_VDIG,

.config_val = GPIO_OUT_LOW,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_VREG,

.seq_val = CAMERA_VANA,

.config_val = 0,

.delay = 0,

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_VANA,

.config_val = GPIO_OUT_LOW,

.delay = 1,

{

.seq_type = CAMERA_POW_SEQ_GPIO,

.seq_val = CAMERA_GPIO_VAF,

.config_val = GPIO_OUT_LOW,

.delay = 1,

.size_down = 8,

.sensor_output =

{

.output_format = SENSOR_BAYER,

.connection_mode = SENSOR_MIPI_CSI,

.raw_output = SENSOR_10_BIT_DIRECT,

#ifndef FLIP_MIRROR

.filter_arrangement = SENSOR_RGGB,

#else

.filter_arrangement = SENSOR_BGGR,

#endif

.output_reg_addr =

{

.x_output = 0x034C,

.y_output = 0x034E,

.line_length_pclk = 0x0342,

.frame_length_lines = 0x0340,

.exp_gain_info =

{

.coarse_int_time_addr = 0x0202,

.global_gain_addr = 0x0204,

.vert_offset = IMX258_MAX_INTEGRATION_MARGIN,

.aec_info =

{

.min_gain = IMX258_MIN_GAIN,

.max_gain = IMX258_MAX_GAIN,

.max_analog_gain = IMX258_MAX_AGAIN,

.max_linecount = 65525 - IMX258_MAX_INTEGRATION_MARGIN,

.sensor_num_frame_skip = 2,

.sensor_num_HDR_frame_skip = 2,

.sensor_max_pipeline_frame_delay = 2,

.sensor_property =

{

.pix_size = 1.12, / um/

.sensing_method = SENSOR_SMETHOD_ONE_CHIP_COLOR_AREA_SENSOR,

.crop_factor = 5.78,

.pixel_array_size_info =

{

.active_array_size =

{

.width = 4208,

.height = 3120,

.left_dummy = 8,

.right_dummy = 8,

.top_dummy = 8,

.bottom_dummy = 8,

.color_level_info =

{

.white_level = 1023,

.r_pedestal = IMX258_DATA_PEDESTAL,

.gr_pedestal = IMX258_DATA_PEDESTAL,

.gb_pedestal = IMX258_DATA_PEDESTAL,

.b_pedestal = IMX258_DATA_PEDESTAL,

.start_settings =

{

.reg_setting_a = START_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

.stop_settings =

{

.reg_setting_a = STOP_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

.groupon_settings =

{

.reg_setting_a = GROUPON_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

.groupoff_settings =

{

.reg_setting_a = GROUPOFF_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

.dualcam_master_settings =

{

.reg_setting_a = DUALCAM_MASTER_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

.size = 8,

.embedded_data_enable_settings =

{

.reg_setting_a = {},

.addr_type = 0,

.data_type = 0,

.delay = 0,

.embedded_data_disable_settings =

{

.reg_setting_a = {},

.addr_type = 0,

.data_type = 0,

.delay = 0,

.test_pattern_info =

{

.test_pattern_settings =

{

.mode = SENSOR_TEST_PATTERN_OFF,

.settings =

{

.reg_setting_a =

{

{0x0600, 0x0000, 0x00},

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_WORD_DATA,

.delay = 0,

}

{

.mode = SENSOR_TEST_PATTERN_SOLID_COLOR,

.settings =

{

.reg_setting_a =

{

{0x0600, 0x0001, 0x00},

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_WORD_DATA,

.delay = 0,

{

.mode = SENSOR_TEST_PATTERN_COLOR_BARS,

.settings =

{

.reg_setting_a =

{

{0x0600, 0x0002, 0x00},

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_WORD_DATA,

.delay = 0,

{

.mode = SENSOR_TEST_PATTERN_COLOR_BARS_FADE_TO_GRAY,

.settings =

{

.reg_setting_a =

{

{0x0600, 0x0003, 0x00},

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_WORD_DATA,

.delay = 0,

{

.mode = SENSOR_TEST_PATTERN_PN9,

.settings =

{

.reg_setting_a =

{

{0x0600, 0x0004, 0x00},

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_WORD_DATA,

.delay = 0,

.size = 5,

.solid_mode_addr =

{

.r_addr = 0x0602,

.gr_addr = 0x0604,

.gb_addr = 0x0608,

.b_addr = 0x0606,

.init_settings_array =

{

.reg_settings =

{

.reg_setting_a = INIT0_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

{

.reg_setting_a = FLIP_MIRROR_SETTING,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

.size = 2,

.res_settings_array =

{

.reg_settings =

{

/ Res 0/

{

.reg_setting_a = RES0_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

/ Res 1/

{

.reg_setting_a = RES1_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

/ Res 2/

{

.reg_setting_a = RES2_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

/ Res 3/

{

.reg_setting_a = RES3_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

/ Res 4/

{

.reg_setting_a = RES4_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

/ Res 5/

{

.reg_setting_a = RES5_REG_ARRAY,

.addr_type = CAMERA_I2C_WORD_ADDR,

.data_type = CAMERA_I2C_BYTE_DATA,

.delay = 0,

.size = 6,

.out_info_array =

{

.out_info =

{/ Res 0/

{

.x_output = 4208,

.y_output = 3120,

.line_length_pclk = 5352,

.frame_length_lines = 3224,

.op_pixel_clk = 480000000,

.binning_factor = 1,

.min_fps = 7.500,

.max_fps = 30.04,

.mode = SENSOR_DEFAULT_MODE,

.offset_x = 0,

.offset_y = 0,

.scale_factor = 1.000,

.is_pdaf_supported = 1,

.data_rate = 1296000000ULL 4

/* Res 1/

{

.x_output = 4208,

.y_output = 2352,

.line_length_pclk = 5352,

.frame_length_lines = 2852,

.op_pixel_clk = 458400000,

.binning_factor = 1,

.min_fps = 7.500,

.max_fps = 30.03,

.mode = SENSOR_DEFAULT_MODE,

.offset_x = 0,

.offset_y = 384,

.scale_factor = 1.000,

.is_pdaf_supported = 1,

.data_rate = 1296000000ULL 4

/* Res 2/

{

.x_output = 2100,

.y_output = 1560,

.line_length_pclk = 5352,

.frame_length_lines = 2851,

.op_pixel_clk = 458400000,

.binning_factor = 2,

.min_fps = 7.500,

.max_fps = 30.04,

.mode = SENSOR_DEFAULT_MODE,

.offset_x = 0,

.offset_y = 0,

.scale_factor = 1.000,

.is_pdaf_supported = 0,

.data_rate = 1296000000ULL 4

/* Res 3*/

{

.x_output = 2100,

.y_output = 1176,

.line_length_pclk = 5352,

.frame_length_lines = 1424,

.op_pixel_clk = 458400000,

.binning_factor = 2,

.min_fps = 7.500,

.max_fps = 60.14,

.mode = SENSOR_HFR_MODE | SENSOR_DEFAULT_MODE,

.offset_x = 0,

.offset_y = 384,

.scale_factor = 1.000,

.is_pdaf_supported = 0,

.data_rate = 1296000000ULL4

/ Res 4/

{

.x_output = 1400,

.y_output = 784,

.line_length_pclk = 5352,

.frame_length_lines = 948,

.op_pixel_clk = 458400000,

.binning_factor = 2,

.min_fps = 7.500,

.max_fps = 90.18,

.mode = SENSOR_HFR_MODE,

.offset_x = 0,

.offset_y = 384,

.scale_factor = 1.000,

.is_pdaf_supported = 0,

.data_rate = 1296000000ULL 4

/* Res 5/

{

.x_output = 1400,

.y_output = 760,

.line_length_pclk = 5352,

.frame_length_lines = 828,

.op_pixel_clk = 480000000,

.binning_factor = 2,

.min_fps = 7.500,

.max_fps = 120.47,

.mode = SENSOR_HFR_MODE,

.offset_x = 0,

.offset_y = 384,

.scale_factor = 1.000,

.is_pdaf_supported = 0,

.data_rate = 1296000000ULL 4

.size = 6,

.csi_params =

{

.lane_cnt = 4,

.settle_cnt = 0xB,

.is_csi_3phase = 0,

.exposure_func_table =

{

.sensor_calculate_exposure = sensor_calculate_exposure,

.sensor_fill_exposure_array = sensor_fill_exposure_array,

.meta_data_out_info_array =

{

.meta_data_out_info =

{

/* set the meta half size which it should be to overcome the isp bug */

.width = 80,

.height = 1920,

.stats_type = PD_STATS,

.dt = IMX258_CSI_PD_ISTATS,

.size = 1,

.sensor_capability = 0,

.awb_func_table =

{

.sensor_fill_awb_array = 0,

.awb_table_size = 0,

.parse_RDI_stats =

{

.parse_VHDR_stats = NULL,

.rolloff_config =

{

.enable = FALSE,

.full_size_info =

{

.full_size_width = 0,

.full_size_height = 0,

.full_size_left_crop = 0,

.full_size_top_crop = 0,

.adc_readout_time = 0,

.sensor_num_fast_aec_frame_skip = 0,

.noise_coeff = {

.gradient_S = 3.738032e-06,

.offset_S = 3.651935e-04,

.gradient_O = 6.396835e-11,

.offset_O = -2.968624e-04,

.pdaf_config = {

#ifndef FLIP_MIRROR

#include “imx258_pdaf.h”

#else

#include “imx258_pdaf_flip_mirror.h”

#endif

};

#endif /*IMX258_LIB_H*/

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二、 Kernel Camera Probe 代码分析

前面我们mm-camera/mm-camera2/media-controller/modules/sensors/module/sensor_init.c中，会下发CFG_SINIT_PROBE给到kernel 中。

memset(&cfg, 0, sizeof(cfg));cfg.cfgtype = CFG_SINIT_PROBE;cfg.cfg.setting = slave_info;ioctl(fd, VIDIOC_MSM_SENSOR_INIT_CFG, &cfg);12345

Kernel 中处理的地方为：

@/kernel/msm-4.14/drivers/media/platform/msm/camera_v2/sensor/msm_sensor_init.c

/* Static function definition/

static int32_t msm_sensor_driver_cmd(struct msm_sensor_init_t s_init,voidarg)

{

struct sensor_init_cfg_data cfg = (struct sensor_init_cfg_data *)arg;

switch (cfg->cfgtype) {case CFG_SINIT_PROBE:s_init->module_init_status = 0;rc = msm_sensor_driver_probe(cfg->cfg.setting, &cfg->probed_info, cfg->entity_name);break;

}

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前面代码中，cfg.setting就是cfg.cfg.setting = slave_info;，而最终probe的结果，保存在cfg->probed_info中。

2.1 msm_sensor_driver_probe() 代码分析

获取上层下发的slave_info 信息根据camera id 获取该camera 的控制函数如果已经probe 过了，则更新 probed_info 信息获取 power 上下电信息保存 Camera_info 结构体，包括 slave_addr，sensor id, setting填充上电信息填充下电信息更新外设设备信息解析eeprom、actuator、flash 等的dts 信息开始上电，上电后会进行check_id 操作，如果 sensor id 匹配成功，则返回成功将sensor 加加载到V4L2 subdev 中，创建节点 /dev/videoX下电，保存 sensor_info 信息到 s_strl 中

@ /kernel/msm-4.14/drivers/media/platform/msm/camera_v2/sensor/msm_sensor_driver.c/* static function definition */int32_t msm_sensor_driver_probe(void *setting,struct msm_sensor_info_t *probed_info, char *entity_name){/* Allocate memory for slave info */slave_info = kzalloc(sizeof(*slave_info), GFP_KERNEL);{// 1. 获取上层下发的slave_info 信息。copy_from_user(slave_info, (void __user *)setting, sizeof(*slave_info));id_info = &(slave_info->sensor_id_info);reg_setting = kzalloc(id_info->setting.size * (sizeof(struct msm_camera_i2c_reg_array)), GFP_KERNEL);copy_from_user(reg_setting, (void __user *) slave_info->sensor_id_info.setting.reg_setting,slave_info->sensor_id_info.setting.size * sizeof(struct msm_camera_i2c_reg_array));slave_info->sensor_id_info.setting.reg_setting = reg_setting;}/* Print slave info */CDBG("camera id %d Slave addr 0x%X addr_type %d\n",slave_info->camera_id, slave_info->slave_addr,slave_info->addr_type);CDBG("sensor_id_reg_addr 0x%X sensor_id 0x%X sensor id mask %d",slave_info->sensor_id_info.sensor_id_reg_addr,slave_info->sensor_id_info.sensor_id,slave_info->sensor_id_info.sensor_id_mask);CDBG("power up size %d power down size %d\n",slave_info->power_setting_array.size,slave_info->power_setting_array.size_down);CDBG("position %d",slave_info->sensor_init_params.position);CDBG("mount %d",slave_info->sensor_init_params.sensor_mount_angle);CDBG("bypass video node creation %d",slave_info->bypass_video_node_creation);

// 2. 根据camera id 获取该camera 的控制函数/* Extract s_ctrl from camera id */s_ctrl = g_sctrl[slave_info->camera_id];CDBG("s_ctrl[%d] %pK", slave_info->camera_id, s_ctrl);// 3. 如果已经probe 过了，则更新 probed_info 信息if (s_ctrl->is_probe_succeed == 1) {/* Different sensor on this camera slot has been connected* and probe already succeeded for that sensor. Ignore this probe */if (slave_info->sensor_id_info.sensor_id == s_ctrl->sensordata->cam_slave_info->sensor_id_info.sensor_id && !(strcmp(slave_info->sensor_name,s_ctrl->sensordata->cam_slave_info->sensor_name))) {pr_err("slot%d: sensor name: %s sensor id%d already probed\n",slave_info->camera_id,slave_info->sensor_name,s_ctrl->sensordata->cam_slave_info->sensor_id_info.sensor_id);msm_sensor_fill_sensor_info(s_ctrl,probed_info, entity_name);} rc = 0;goto free_slave_info;}// 4.获取 power 上下电信息rc = msm_sensor_get_power_settings(setting, slave_info, &s_ctrl->sensordata->power_info);// 5. 保存 Camera_info 结构体，包括 slave_addr，sensor id, settingcamera_info = kzalloc(sizeof(struct msm_camera_slave_info), GFP_KERNEL);s_ctrl->sensordata->slave_info = camera_info;/* Fill sensor slave info */camera_info->sensor_slave_addr = slave_info->slave_addr;camera_info->sensor_id_reg_addr = slave_info->sensor_id_info.sensor_id_reg_addr;camera_info->sensor_id = slave_info->sensor_id_info.sensor_id;camera_info->sensor_id_mask = slave_info->sensor_id_info.sensor_id_mask;camera_info->setting = &(slave_info->sensor_id_info.setting);/* Fill sensor address type */s_ctrl->sensor_i2c_client->addr_type = slave_info->addr_type;if (s_ctrl->sensor_i2c_client->client)s_ctrl->sensor_i2c_client->client->addr = camera_info->sensor_slave_addr;cci_client = s_ctrl->sensor_i2c_client->cci_client;cci_client->cci_i2c_master = s_ctrl->cci_i2c_master;cci_client->sid = slave_info->slave_addr >> 1;cci_client->retries = 3;cci_client->id_map = 0;cci_client->i2c_freq_mode = slave_info->i2c_freq_mode;// 6. 填充上电信息/* Parse and fill vreg params for powerup settings */rc = msm_camera_fill_vreg_params(s_ctrl->sensordata->power_info.cam_vreg,s_ctrl->sensordata->power_info.num_vreg,s_ctrl->sensordata->power_info.power_setting,s_ctrl->sensordata->power_info.power_setting_size);// 7. 填充下电信息/* Parse and fill vreg params for powerdown settings*/rc = msm_camera_fill_vreg_params(s_ctrl->sensordata->power_info.cam_vreg,s_ctrl->sensordata->power_info.num_vreg,s_ctrl->sensordata->power_info.power_down_setting,s_ctrl->sensordata->power_info.power_down_setting_size);

CSID_TG:

/* Update sensor, actuator and eeprom name in

* sensor control structure

// 8. 更新外设设备信息

s_ctrl->sensordata->sensor_name = slave_info->sensor_name;

s_ctrl->sensordata->eeprom_name = slave_info->eeprom_name;

s_ctrl->sensordata->actuator_name = slave_info->actuator_name;

s_ctrl->sensordata->ois_name = slave_info->ois_name;

s_ctrl->sensordata->flash_name = slave_info->flash_name;

// 9. 解析eeprom、actuator、flash 等的dts 信息

/ Update eeporm subdevice Id by input eeprom name/

rc = msm_sensor_fill_eeprom_subdevid_by_name(s_ctrl);

/ Update actuator subdevice Id by input actuator name */

rc = msm_sensor_fill_actuator_subdevid_by_name(s_ctrl);

rc = msm_sensor_fill_laser_led_subdevid_by_name(s_ctrl);

rc = msm_sensor_fill_ois_subdevid_by_name(s_ctrl);

rc = msm_sensor_fill_flash_subdevid_by_name(s_ctrl);

// 10. 开始上电，上电后会进行check_id 操作，如果 sensor id 匹配成功，则返回成功，/* Power up and probe sensor */rc = s_ctrl->func_tbl->sensor_power_up(s_ctrl);========================>+@ /kernel/msm-4.14/drivers/media/platform/msm/camera_v2/sensor/msm_sensor.c+static struct msm_sensor_fn_t msm_sensor_func_tbl = {+.sensor_config = msm_sensor_config,+.sensor_power_up = msm_sensor_power_up,+.sensor_power_down = msm_sensor_power_down,+.sensor_match_id = msm_sensor_match_id,+};++rc = msm_camera_power_up(power_info, s_ctrl->sensor_device_type, sensor_i2c_client);+rc = msm_sensor_check_id(s_ctrl);<========================pr_err("%s probe succeeded", slave_info->sensor_name);s_ctrl->bypass_video_node_creation = slave_info->bypass_video_node_creation;/** Create /dev/videoX node, comment for now until dummy /dev/videoX* node is created and used by HAL*/// 11. 将sensor 加加载到V4L2 subdev 中，创建节点 /dev/videoXif (s_ctrl->sensor_device_type == MSM_CAMERA_PLATFORM_DEVICE)rc = msm_sensor_driver_create_v4l_subdev(s_ctrl);elserc = msm_sensor_driver_create_i2c_v4l_subdev(s_ctrl);// 12. 下电，保存 sensor_info 信息到 s_strl 中。/* Power down */s_ctrl->func_tbl->sensor_power_down(s_ctrl);rc = msm_sensor_fill_slave_info_init_params(slave_info, s_ctrl->sensordata->sensor_info);rc = msm_sensor_validate_slave_info(s_ctrl->sensordata->sensor_info);/*Save sensor info*/s_ctrl->sensordata->cam_slave_info = slave_info;msm_sensor_fill_sensor_info(s_ctrl, probed_info, entity_name);/** Set probe succeeded flag to 1 so that no other camera shall* probed on this slot*/s_ctrl->is_probe_succeed = 1;return rc;

}

2.1.1 创建 /dev/videoX、 /dev/v4l-subdevX 节点

创建 /dev/videoX 节点初始化 s_ctrl->msm_sd.sd 节构体信息，将ops 绑定到 sd 中更新 subdev 信息，并注册subdev将 subdev 添回到 subdev list 链表中创建 /dev/v4l-subdevX 节点

@ msm-4.14/drivers/media/platform/msm/camera_v2/sensor/msm_sensor_driver.cstatic int32_t msm_sensor_driver_create_v4l_subdev(struct msm_sensor_ctrl_t *s_ctrl){// 1. 创建 /dev/videoX 字付设备节点if (s_ctrl->bypass_video_node_creation == 0) {rc = camera_init_v4l2(&s_ctrl->pdev->dev, &session_id);=============>+@ msm-4.14/drivers/media/platform/msm/camera_v2/camera/camera.c+strlcpy(pvdev->vdev->name, "msm-sensor", sizeof(pvdev->vdev->name));+pvdev->vdev->fops= &camera_v4l2_fops;+pvdev->vdev->ioctl_ops = &camera_v4l2_ioctl_ops;+video_register_device(pvdev->vdev,VFL_TYPE_GRABBER, -1);+----------------->+@ msm-4.14/include/media/v4l2-dev.h+__video_register_device(vdev, type, nr, 1, vdev->fops->owner);+------------>+name_base = "video";+/* Pick a device node number */+minor_offset = 0;+minor_cnt = 64;+nr = devnode_find(vdev, 0, minor_cnt);+video_device[vdev->minor] = vdev;+/* Part 3: Initialize the character device */+vdev->cdev->ops = &v4l2_fops;+vdev->cdev->owner = owner;+ret = cdev_add(vdev->cdev, MKDEV(VIDEO_MAJOR, vdev->minor), 1);+/* Part 4: register the device with sysfs */+vdev->dev.class = &video_class;+vdev->dev.devt = MKDEV(VIDEO_MAJOR, vdev->minor);+vdev->dev.parent = vdev->dev_parent;+dev_set_name(&vdev->dev, "%s%d", name_base, vdev->num);+ret = device_register(&vdev->dev);+<------------+<-----------------<=============}

CDBG("rc %d session_id %d", rc, session_id);s_ctrl->sensordata->sensor_info->session_id = session_id;// 2. 初始化 s_ctrl->msm_sd.sd 节构体信息，将ops 绑定到 sd 中/* Create /dev/v4l-subdevX device */v4l2_subdev_init(&s_ctrl->msm_sd.sd, s_ctrl->sensor_v4l2_subdev_ops);// 3. 更新 subdev 信息，并注册// imx258snprintf(s_ctrl->msm_sd.sd.name, sizeof(s_ctrl->msm_sd.sd.name), "%s",s_ctrl->sensordata->sensor_name);v4l2_set_subdevdata(&s_ctrl->msm_sd.sd, s_ctrl->pdev);s_ctrl->msm_sd.sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;media_entity_pads_init(&s_ctrl->msm_sd.sd.entity, 0, NULL);s_ctrl->msm_sd.sd.entity.function = MSM_CAMERA_SUBDEV_SENSOR;s_ctrl->msm_sd.sd.entity.name = s_ctrl->msm_sd.sd.name; // imx258s_ctrl->msm_sd.close_seq = MSM_SD_CLOSE_2ND_CATEGORY | 0x3;rc = msm_sd_register(&s_ctrl->msm_sd);=======================>@ msm-4.14/drivers/media/platform/msm/camera_v2/msm.c__msm_sd_register_subdev(&msm_subdev->sd);----------->// 3.1 将 subdev 添回到 subdev list 链表中rc = v4l2_device_register_subdev(msm_v4l2_dev, sd);--------->list_add_tail(&sd->list, &v4l2_dev->subdevs);<---------strlcpy(vdev->name, sd->name, sizeof(vdev->name));// imx258vdev->v4l2_dev = msm_v4l2_dev;vdev->fops = msm_cam_get_v4l2_subdev_fops_ptr();vdev->release = msm_sd_unregister_subdev;// 3.2 创建 /dev/v4l-subdevX 节点rc = __video_register_device(vdev, VFL_TYPE_SUBDEV, -1, 1,sd->owner);--------->@ msm-4.14/drivers/media/v4l2-core/v4l2-dev.cname_base = "v4l-subdev";minor_offset = 128;minor_cnt = 64;/* Pick a device node number */nr = devnode_find(vdev, nr == -1 ? 0 : nr, minor_cnt);video_device[vdev->minor] = vdev;/* Part 3: Initialize the character device */vdev->cdev->ops = &v4l2_fops;vdev->cdev->owner = owner;ret = cdev_add(vdev->cdev, MKDEV(VIDEO_MAJOR, vdev->minor), 1);/* Part 4: register the device with sysfs */vdev->dev.class = &video_class;vdev->dev.devt = MKDEV(VIDEO_MAJOR, vdev->minor);vdev->dev.parent = vdev->dev_parent;dev_set_name(&vdev->dev, "%s%d", name_base, vdev->num); // v4l-subdevXret = device_register(&vdev->dev);<---------<-----------<=======================msm_cam_copy_v4l2_subdev_fops(&msm_sensor_v4l2_subdev_fops);

#ifdef CONFIG_COMPAT

pat_ioctl32 = msm_sensor_subdev_fops_ioctl;

#endif

s_ctrl->msm_sd.sd.devnode->fops = &msm_sensor_v4l2_subdev_fops;

return rc;

}

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至此，整个probe 过程就完毕了。

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