MTK Camera Senor Bring up 复盘总结

和你一起终身学习，这里是程序员Android

经典好文推荐，通过阅读本文，您将收获以下知识点:

一、ProjectConfig.mk文件配置
二、defconfig文件修改
三、kernel层驱动代码
四、hal层驱动代码
五、kernel层摄像头文件夹
六、hal层摄像头文件夹
七、sensor上下电代码

这里记录添加一个新的sensor需要注意的文件，以mt6779为例。

一、ProjectConfig.mk文件配置

//device/mediatek/mt6779/ProjectConfig.mk

//sensorCUSTOM_HAL_IMGSENSOR = gc8034_mipi_raw hi846_mipi_raw gc5035_mipi_raw sc500cs_mipi_raw
CUSTOM_HAL_MAIN_IMGSENSOR =gc8034_mipi_raw hi846_mipi_raw
CUSTOM_HAL_SUB_IMGSENSOR = gc5035_mipi_raw sc500cs_mipi_rawCUSTOM_KERNEL_IMGSENSOR = gc8034_mipi_raw hi846_mipi_raw gc5035_mipi_raw sc500cs_mipi_raw
CUSTOM_KERNEL_MAIN_IMGSENSOR = gc8034_mipi_raw hi846_mipi_raw
CUSTOM_KERNEL_SUB_IMGSENSOR = gc5035_mipi_raw sc500cs_mipi_raw//lensCUSTOM_HAL_LENS = fp5510e2af dummy_lens
CUSTOM_HAL_MAIN_LENS = fp5510e2af
CUSTOM_HAL_SUB_LENS = dummy_lensCUSTOM_KERNEL_LENS = fp5510e2af dummy_lens
CUSTOM_KERNEL_MAIN_LENS = fp5510e2af
CUSTOM_KERNEL_SUB_LENS = dummy_lens//flashlight：支持flashlight则设置为constant_flashlight，不支持设置为 dummy_flashlightCUSTOM_HAL_FLASHLIGHT = dummy_flashlight
CUSTOM_KERNEL_FLASHLIGHT = constant_flashlight

二、defconfig文件修改

//kernel-4.19/arch/arm64/configs/
//k79v1_64_defconfig 和 k79v1_64_debug_defconfig

CONFIG_CUSTOM_KERNEL_IMGSENSOR="gc8034_mipi_raw hi846_mipi_raw gc5035_mipi_raw sc500cs_mipi_raw"

三、kernel层驱动代码

添加新的camera sensor ID定义，sensor ID 来自于对应的 datasheet

//device/mediatek/common/kernel-headers/kd_imgsensor.h

#define GC8034_SENSOR_ID      0x8044#define SENSOR_DRVNAME_GC8034_MIPI_RAW "gc8034_mipi_raw"#define SC500CS_SENSOR_ID     0xEE27#define SENSOR_DRVNAME_SC500CS_MIPI_RAW          "sc500cs_mipi_raw"//kernel-4.19/drivers/misc/mediatek/imgsensor/inc/kd_imgsensor.h#define GC8034_SENSOR_ID     0x8044#define SENSOR_DRVNAME_GC8034_MIPI_RAW          "gc8034_mipi_raw"#define SC500CS_SENSOR_ID    0xEE27#define SENSOR_DRVNAME_SC500CS_MIPI_RAW          "sc500cs_mipi_raw"

//kernel-4.19/drivers/misc/mediatek/imgsensor/src/common/v1(v1_1)/imgsensor_sensor_list.h

extern struct IMGSENSOR_INIT_FUNC_LIST kdSensorList[];UINT32 GC8034_MIPI_RAW_SensorInit(struct SENSOR_FUNCTION_STRUCT **pfFunc);/*第一个参数对应 Camera Snesor ID第二个参数对应 Camera Sensor name第三个参数对应 Camera Sensor init Function
*///kernel-4.19/drivers/misc/mediatek/imgsensor/src/common/v1(v1_1)/imgsensor_sensor_list.cstruct IMGSENSOR_INIT_FUNC_LIST kdSensorList[MAX_NUM_OF_SUPPORT_SENSOR] = {//...#if defined(GC8034_MIPI_RAW){GC8034_SENSOR_ID,SENSOR_DRVNAME_GC8034_MIPI_RAW,GC8034_MIPI_RAW_SensorInit},#endif}//kernel-4.19/drivers/misc/mediatek/imgsensor/src/mt6779/gc8034_mipi_raw/gc8034mipi_Sensor.cUINT32 GC8034_MIPI_RAW_SensorInit(struct SENSOR_FUNCTION_STRUCT **pfFunc){/* Check Sensor status here */if (pfFunc != NULL)*pfFunc = &sensor_func;return ERROR_NONE;}

四、hal层驱动代码

在hal层的sensor列表添加新的sensor

//vendor/mediatek/proprietary/custom/mt6739/hal/imgsensor_src/sensorlist.cpp

MSDK_SENSOR_INIT_FUNCTION_STRUCT SensorList[] ={//...#if defined(GC8034_MIPI_RAW)RAW_INFO_M(GC8034_SENSOR_ID, DEFAULT_MODULE_INDEX, DEFAULT_MODULE_ID, SENSOR_DRVNAME_GC8034_MIPI_RAW,NULL),#endif#if defined(SC500CS_MIPI_RAW)RAW_INFO_M(SC500CS_SENSOR_ID, DEFAULT_MODULE_INDEX, DEFAULT_MODULE_ID, SENSOR_DRVNAME_SC500CS_MIPI_RAW, NULL),#endif}

注意：sensorlist.cpp 中的SensorList[] 与 kd_sensorlist.h 中的kdSensorList[]的sensor 顺序必须一致，否则 user space 和 kernel space 在通过 ioctl 传递命令 id 时会对应错误。

五、kernel层摄像头文件夹

（A）lens文件路径：kernel-4.19/drivers/misc/mediatek/lens/

（B）flashlight文件路径：kernel-4.19/drivers/misc/mediatek/flashlight/

（C）imgsensor文件路径：

把厂商提供的包含前摄像头驱动文件夹 sc500cs_mipi_raw 和后摄像头驱动文件夹 gc8034_mipi_raw 拷贝到对应目录下，这两个文件夹里存放着厂商写好的前后摄像头驱动代码。

//kernel-4.19/drivers/misc/mediatek/imgsensor/src/mt6779/gc8034_mipi_raw
gc8034mipi_Sensor.h
gc8034mipi_Sensor.cMakefile//kernel-4.19/drivers/misc/mediatek/imgsensor/src/mt6779/sc500cs_mipi_raw
sc500csmipiraw_Sensor.h
sc500csmipiraw_Sensor.cMakefile

六、hal层摄像头文件夹

（A）lens文件路径：/vendor/mediatek/proprietary/custom/mt6779/hal/lens/

（B）flashlight文件路径：/vendor/mediatek/proprietary/custom/mt6779/hal/flashlight/

（C）imgsensor文件路径：/vendor/mediatek/proprietary/custom/mt6779/hal/imgsensor/

（D）metadata文件路径：/vendor/mediatek/proprietary/custom/mt6779/hal/imgsensor_metadata/

七、sensor上下电代码

//该文件配置sensor的上下电
//kernel-4.19/dirvers/misc/mediateck/imgsensor/src/mt6739/camera_hw/imgsensor_cfg_table.c

struct IMGSENSOR_HW_POWER_SEQ sensor_power_sequence[] = {//.../*第一个参数对应 PowerType第二个参数对应 Voltage第三个参数对应 Delay Time in msDVDD/DOVDD/AVDD/AFVDD 的电压支持情况可以参考 specific pmic datasheet 进行设置*/#if defined(GC8034_MIPI_RAW){SENSOR_DRVNAME_GC8034_MIPI_RAW,{{PDN, Vol_Low, 0},{RST, Vol_Low, 1},{DOVDD, Vol_1800, 1},{DVDD, Vol_1200, 1},{AVDD, Vol_2800, 1},{SensorMCLK, Vol_High, 2},{PDN, Vol_High, 0},{RST, Vol_High, 2}},},#endif#if defined(SC500CS_MIPI_RAW){SENSOR_DRVNAME_SC500CS_MIPI_RAW,{{PDN, Vol_Low, 0},{RST, Vol_Low, 1},{DOVDD, Vol_1800, 1},{DVDD, Vol_1200, 1},{AVDD, Vol_2800, 1},{SensorMCLK, Vol_High, 2},{PDN, Vol_High, 0},{RST, Vol_High, 2}},},#endif}struct IMGSENSOR_HW_CFG imgsensor_custom_config[] = {{IMGSENSOR_SENSOR_IDX_MAIN,IMGSENSOR_I2C_DEV_0,{{IMGSENSOR_HW_PIN_MCLK,  IMGSENSOR_HW_ID_MCLK},{IMGSENSOR_HW_PIN_AVDD,  IMGSENSOR_HW_ID_GPIO},//GPIO上电逻辑{IMGSENSOR_HW_PIN_DOVDD, IMGSENSOR_HW_ID_REGULATOR},{IMGSENSOR_HW_PIN_DVDD,  IMGSENSOR_HW_ID_GPIO},{IMGSENSOR_HW_PIN_PDN,   IMGSENSOR_HW_ID_GPIO},{IMGSENSOR_HW_PIN_RST,   IMGSENSOR_HW_ID_GPIO},{IMGSENSOR_HW_PIN_NONE,  IMGSENSOR_HW_ID_NONE},},},{IMGSENSOR_SENSOR_IDX_SUB,IMGSENSOR_I2C_DEV_1,{{IMGSENSOR_HW_PIN_MCLK,  IMGSENSOR_HW_ID_MCLK},{IMGSENSOR_HW_PIN_AVDD,  IMGSENSOR_HW_ID_GPIO},{IMGSENSOR_HW_PIN_DOVDD, IMGSENSOR_HW_ID_REGULATOR},{IMGSENSOR_HW_PIN_DVDD,  IMGSENSOR_HW_ID_GPIO},{IMGSENSOR_HW_PIN_PDN,   IMGSENSOR_HW_ID_GPIO},{IMGSENSOR_HW_PIN_RST,   IMGSENSOR_HW_ID_GPIO},{IMGSENSOR_HW_PIN_NONE, IMGSENSOR_HW_ID_NONE},},},}struct IMGSENSOR_HW_POWER_SEQ platform_power_sequence[] = {#ifdef MIPI_SWITCH{IMGSENSOR_TOSTRING(IMGSENSOR_SENSOR_IDX_SUB),{{IMGSENSOR_HW_PIN_MIPI_SWITCH_EN,IMGSENSOR_HW_PIN_STATE_LEVEL_0,0,IMGSENSOR_HW_PIN_STATE_LEVEL_HIGH,0},{IMGSENSOR_HW_PIN_MIPI_SWITCH_SEL,IMGSENSOR_HW_PIN_STATE_LEVEL_HIGH,0,IMGSENSOR_HW_PIN_STATE_LEVEL_0,0},}},#endif

//kernel-4.19/drivers/misc/mediatek/imgsensor/src/mt6761/camera_hw/regulator/regulator.c

enum REGULATOR_VOLTAGE {REGULATOR_VOLTAGE_0    = 0,REGULATOR_VOLTAGE_1000 = 1000000,REGULATOR_VOLTAGE_1100 = 1100000,REGULATOR_VOLTAGE_1200 = 1200000,REGULATOR_VOLTAGE_1210 = 1210000,REGULATOR_VOLTAGE_1220 = 1220000,REGULATOR_VOLTAGE_1500 = 1500000,REGULATOR_VOLTAGE_1800 = 1800000,REGULATOR_VOLTAGE_2500 = 2500000,REGULATOR_VOLTAGE_2800 = 2800000,REGULATOR_VOLTAGE_2900 = 2900000,};enum REGULATOR_TYPE {REGULATOR_TYPE_VCAMA,REGULATOR_TYPE_VCAMD,REGULATOR_TYPE_VCAMIO,REGULATOR_TYPE_MAX_NUM};static const int regulator_voltage[] = {REGULATOR_VOLTAGE_0,REGULATOR_VOLTAGE_1000,REGULATOR_VOLTAGE_1100,REGULATOR_VOLTAGE_1200,REGULATOR_VOLTAGE_1210,REGULATOR_VOLTAGE_1220,REGULATOR_VOLTAGE_1500,REGULATOR_VOLTAGE_1800,REGULATOR_VOLTAGE_2500,REGULATOR_VOLTAGE_2800,REGULATOR_VOLTAGE_2900,};struct REGULATOR_CTRL regulator_control[REGULATOR_TYPE_MAX_NUM] = {{"vcama"},{"vcamd"},{"vcamio"},};//然后通过regulator_init，regulator_set函数进行电压设置static struct IMGSENSOR_HW_DEVICE device = {.id        = IMGSENSOR_HW_ID_REGULATOR,.pinstance = (void *)&reg_instance,.init      = regulator_init,.set       = regulator_set,.release   = regulator_release,.dump      = regulator_dump};enum IMGSENSOR_RETURN imgsensor_hw_regulator_open(struct IMGSENSOR_HW_DEVICE **pdevice){*pdevice = &device;return IMGSENSOR_RETURN_SUCCESS;}

GPIO上电逻辑：主要配置GPIO的上电逻辑，把camera的上电管脚与平台管脚相关联
code：kernel-4.19/arch/arm64/boot/dts/mediatek/k79v1_64.dts

原文链接：https://blog.csdn.net/dongxianfei/article/details/121081576

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