文章目录前言一、关键路径1.1 device/emdoor/project_name/ProjectConfig.mk1.2 device/mediatek/mt6789/CameraConfig.mk1.3 device/mediatek/common/kernel-headers/kd_imgsensor.h1.4 kernel-5.10/arch/arm64/boot/dts/mediatek/cust_project_name_camera.dtsi1.5 kernel-5.10/arch/arm64/boot/dts/mediatek/project_name.dts1.6 kernel-5.10/arch/arm64/configs/project_name_defconfig1.7 kernel-5.10/drivers/misc/mediatek/imgsensor/inc/kd_imgsensor.h1.8 kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1/gc08a3main_mipi_raw1.9 kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1/imgsensor_sensor_list.c1.10 kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1/imgsensor_sensor_list.h1.11 修改上电引脚及时序 imgsensor_cfg_table.c1.12 vendor/mediatek/proprietary/custom/mt6768/hal/imgsensor_src/sensorlist.cpp1.13 metedata 与mipi raw也需要一并合入二、kernel 中的gc08a3代码简析三、注意事项前言记录MTK自有相机框架 适配这里以新增 gc08a3 为例一、关键路径1.1 device/emdoor/project_name/ProjectConfig.mk//在HAL中新增gc08a3main_mipi_rawCUSTOM_HAL_IMGSENSORgc08a3main_mipi_raw//指定gc08a3main_mipi_raw为HAL中的主imgsensorCUSTOM_HAL_MAIN_IMGSENSORgc08a3main_mipi_raw//在KERNEL中新增gc08a3main_mipi_rawCUSTOM_KERNEL_IMGSENSORgc08a3main_mipi_raw//指定KERNEL中的主imgsensor为gc08a3main_mipi_rawCUSTOM_KERNEL_MAIN_IMGSENSORgc08a3main_mipi_raw注意如果需要新增sub相机gc08a8sub_cxt_mipi_raw也要做如下操作其余的步骤也要跟下列的所有操作一致//在HAL中新增子相机gc08a8sub_cxt_mipi_rawCUSTOM_HAL_IMGSENSORgc08a3main_mipi_raw gc08a8sub_cxt_mipi_raw//指定gc08a8sub_cxt_mipi_raw为HAL中的子imgsensorCUSTOM_HAL_SUB_IMGSENSORgc08a8sub_cxt_mipi_raw//在KERNEL中新增gc08a3main_mipi_rawCUSTOM_KERNEL_IMGSENSORgc08a3main_mipi_raw gc08a8sub_cxt_mipi_raw//指定KERNEL中的子imgsensor为gc08a8sub_cxt_mipi_rawCUSTOM_KERNEL_SUB_IMGSENSORgc08a8sub_cxt_mipi_raw1.2 device/mediatek/mt6789/CameraConfig.mk//注意如果相机的个数超过了3个这部分内容需要修改一下MTK_CAM_MAX_NUMBER_OF_CAMERA31.3 device/mediatek/common/kernel-headers/kd_imgsensor.h#defineGC08A3MAIN_SENSOR_ID0x08a3#defineSENSOR_DRVNAME_GC08A3MAIN_MIPI_RAWgc08a3main_mipi_raw1.4 kernel-5.10/arch/arm64/boot/dts/mediatek/cust_project_name_camera.dtsi确认各引脚的复用功能及其对应电气属性是否符合原理图1.5 kernel-5.10/arch/arm64/boot/dts/mediatek/project_name.dts确认原理图是否包含了1.3的相机的原理图1.6 kernel-5.10/arch/arm64/configs/project_name_defconfig//config包含了需要编译的相机CONFIG_CUSTOM_KERNEL_IMGSENSORgc08a3main_mipi_raw1.7 kernel-5.10/drivers/misc/mediatek/imgsensor/inc/kd_imgsensor.h#defineGC08A3MAIN_SENSOR_ID0x08a3#defineSENSOR_DRVNAME_GC08A3MAIN_MIPI_RAWgc08a3main_mipi_raw1.8 kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1/gc08a3main_mipi_raw在路径kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1下创建gc08a3main_mipi_raw文件夹从上一个项目复制其Makefile文件Makefile#SPDX-License-Identifier:GPL-2.0#Copyright(C)2020MediaTek Inc.# 这部分是我们需要编译的相机驱动 IMGSENSOR_SUBDRV_OBJ:\ $(subdrv-rpath)/gc08a3main_mipi_Sensor.o \ # 下面这部分内容沿用上一个项目的或者mediateksample的ifeq($(CONFIG_MTK_IMGSENSOR_ISP3_Z),m)$(eval $(MTK_PLATFORM_KO)-objs$(IMGSENSOR_SUBDRV_OBJ))elseifeq($(CONFIG_MTK_IMGSENSOR_ISP3_Z),y)obj-$(CONFIG_MTK_IMGSENSOR_ISP3_Z)$(IMGSENSOR_SUBDRV_OBJ)endififeq($(CONFIG_MTK_IMGSENSOR_ISP4),m)$(eval $(MTK_PLATFORM_KO)-objs$(IMGSENSOR_SUBDRV_OBJ))elseifeq($(CONFIG_MTK_IMGSENSOR_ISP4),y)obj-$(CONFIG_MTK_IMGSENSOR_ISP4)$(IMGSENSOR_SUBDRV_OBJ)elseifeq($(CONFIG_MTK_IMGSENSOR_ISP3_M),m)$(eval $(MTK_PLATFORM_KO)-objs$(IMGSENSOR_SUBDRV_OBJ))elseifeq($(CONFIG_MTK_IMGSENSOR_ISP3_M),y)obj-$(CONFIG_MTK_IMGSENSOR_ISP3_M)$(IMGSENSOR_SUBDRV_OBJ)endififeq($(CONFIG_MTK_IMGSENSOR_ISP4_C),m)$(eval $(MTK_PLATFORM_KO)-objs$(IMGSENSOR_SUBDRV_OBJ))elseifeq($(CONFIG_MTK_IMGSENSOR_ISP4_C),y)obj-$(CONFIG_MTK_IMGSENSOR_ISP4_C)$(IMGSENSOR_SUBDRV_OBJ)endif新增gc08a3main_mipi_Sensor.c 和 gc08a3main_mipi_Sensor.h到该文件夹下具体的驱动内容这一章节不讲解下一章节会简单讲解1.9 kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1/imgsensor_sensor_list.cstructIMGSENSOR_INIT_FUNC_LISTkdSensorList[MAX_NUM_OF_SUPPORT_SENSOR]{...//GC08A3MAIN_MIPI_RAW_SensorInit#ifdefined(GC08A3MAIN_MIPI_RAW){GC08A3MAIN_SENSOR_ID,SENSOR_DRVNAME_GC08A3MAIN_MIPI_RAW,GC08A3MAIN_MIPI_RAW_SensorInit},#endif...};1.10 kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1/imgsensor_sensor_list.hUINT32GC08A3MAIN_MIPI_RAW_SensorInit(structSENSOR_FUNCTION_STRUCT**pfFunc);1.11 修改上电引脚及时序 imgsensor_cfg_table.c这个文件在common下有许多我们需要注意上一代项目具体所使用的是哪一个这里使用ips4的同时因为这颗相机是一个主摄因此其对应的是IMGSENSOR_SENSOR_IDX_MAIN其中这些内容是定义引脚的上电类型注意上电引脚的类型配置也可能在kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1_1/camera_hw/imgsensor_cfg_table.cstructIMGSENSOR_HW_CFGimgsensor_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},{IMGSENSOR_HW_PIN_AVDD1,IMGSENSOR_HW_ID_REGULATOR},{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_AFVDD,IMGSENSOR_HW_ID_REGULATOR},{IMGSENSOR_HW_PIN_NONE,IMGSENSOR_HW_ID_NONE},},},};structIMGSENSOR_HW_POWER_SEQsensor_power_sequence[]{#ifdefined(GC08A3MAIN_MIPI_RAW){SENSOR_DRVNAME_GC08A3MAIN_MIPI_RAW,{{RST,Vol_Low,0},{PDN,Vol_Low,1},{SensorMCLK,Vol_High,1},{DOVDD,Vol_1800,1},{DVDD,Vol_1200,1},{AVDD,Vol_2800,1},{RST,Vol_High,1},{PDN,Vol_High,2},},},#endif...};注意这个上电时序也有可能在kernel-5.10/drivers/misc/mediatek/imgsensor/src/common/v1_1/imgsensor_pwr_seq.c1.12 vendor/mediatek/proprietary/custom/mt6768/hal/imgsensor_src/sensorlist.cppMSDK_SENSOR_INIT_FUNCTION_STRUCT SensorList[]{#ifdefined(GC08A3MAIN_MIPI_RAW)//这里需要注意这个输入的格式这颗相机是RAW_INFO//GC08A3MAIN_SENSOR_ID的定义在效果文件夹里//SENSOR_DRVNAME_GC08A3MAIN_MIPI_RAW的定义也在效果文件夹里RAW_INFO(GC08A3MAIN_SENSOR_ID,SENSOR_DRVNAME_GC08A3MAIN_MIPI_RAW,NULL),#endif};1.13 metedata 与mipi raw也需要一并合入metedata路径vendor/mediatek/proprietary/custom/project_name/hal/imgsensor_metadata/gc08a3main_mipi_raw/mipi raw路径vendor/mediatek/proprietary/custom/mt6768/hal/imgsensor/ver1/gc08a3main_mipi_raw/二、kernel 中的gc08a3代码简析gc08a3main_mipi_Sensor.c三、注意事项配mclk、port端口等信息需要去vendor/mediatek/proprietary/custom/paltform_name(mt6768) or 皮project_name/hal/imgsensor_src下的cfg_setting_imgsensor.cppstaticCUSTOM_CFG gCustomCfg[]{{//相机对应的ID,见第一章中的定义ProjectConfig的配置.sensorIdxIMGSENSOR_SENSOR_IDX_MAIN,//这个也需要查看使用的是哪个时钟.mclkeMclk_1,//下面就是使用的端口是CSI0还是CSI1#ifdefG88_PROJECT.portEMipiPort_CSI1,#else.portEMipiPort_CSI0,#endif//这个是前后摄.dirCUSTOM_CFG_DIR_REAR,.bitOrderCUSTOM_CFG_BITORDER_9_2,.orientation90,.horizontalFov67,.verticalFov49,.PadPclkInv0,},