摄像头移植简述(mtk)

这里以mt6737t为例

1、编译摄像头驱动
   device/lentek/xxxxxx/ProjectConfig.mk
   kernel-3.18/arch/arm64/configs/xxxxx_defconfig
   kernel-3.18/drivers/misc/mediatek/imgsensor/src/mt6735/
   kernel-3.18/drivers/misc/mediatek/imgsensor/inc/kd_imgsensor.h
2、上电
   kernel-3.18/drivers/misc/mediatek/imgsensor/src/mt6735/camera_hw/kd_camera_hw.c
3、hal修改
   device/mediatek/common/kernel-headers/kd_imgsensor.h
   vendor/mediatek/proprietary/custom/mt6735/hal/D1/imgsensor_src/sensorlist.cpp
   vendor/mediatek/proprietary/custom/mt6735/hal/D1/imgsensor/

上电过程小析

vendor/mediatek/proprietary/hardware/mtkcam/legacy/platform/mt6735/hal/sensor/imgsensor_drv.c

MINT32 ImgSensorDrv::impSearchSensor(pfExIdChk pExIdChkCbf)
for (SensorEnum = 0; SensorEnum <= 2; SensorEnum <<= 1)  {for (i = 0; i < MAX_NUM_OF_SUPPORT_SENSOR; i++) {if (m_pstSensorInitFunc[i].getCameraDefault == NULL) {LOG_MSG("m_pstSensorInitFunc[i].getCameraDefault is NULL: %d \n", i);break;}ioctl(m_fdSensor, KDIMGSENSORIOC_X_SET_DRIVER,&id[KDIMGSENSOR_INVOKE_DRIVER_0] );ioctl(m_fdSensor, KDIMGSENSORIOC_T_CHECK_IS_ALIVE);}
}

先找后摄，再找前摄（遍历所有摄像头上电匹配id）
对于后摄，上电时上的是后摄的电源，所以前摄的id匹配不上。（前摄同理于后摄）

这里，后摄兼容3颗sensor,分别是ov5695,ov8856,gc5025,前摄为sp2509，打印如下

2565:01-12 23:25:57.130   454   454 D ImgSensorDrv: [impSearchSensor]SENSOR search start
2566:01-12 23:25:57.130   454   454 D ImgSensorDrv: [impSearchSensor]impSearchSensor search to sub
2567:01-12 23:25:57.130   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =10000
2706:01-12 23:25:57.317   454   454 D ImgSensorDrv: [impSearchSensor][impSearchSensor] Err-ctrlCode (I/O error)
2710:01-12 23:25:57.317   454   454 D ImgSensorDrv: [impSearchSensor]sensor ID mismatch
2711:01-12 23:25:57.317   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =10001
2876:01-12 23:25:57.473   454   454 D ImgSensorDrv: [impSearchSensor][impSearchSensor] Err-ctrlCode (I/O error)
2880:01-12 23:25:57.482   454   454 D ImgSensorDrv: [impSearchSensor]sensor ID mismatch
2881:01-12 23:25:57.482   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =10002
3294:01-12 23:25:57.810   454   454 D ImgSensorDrv: [impSearchSensor]found <0x5025/gc5025mipiraw/SENSOR_DRVNAME_GC5025_MIPI_RAW>
3295:01-12 23:25:57.810   454   454 D ImgSensorDrv: [impSearchSensor]MAIN sensor found:[2]/[0x10002]/[0]/[1]
3296:01-12 23:25:57.810   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =10003
3521:01-12 23:25:58.118   454   454 D ImgSensorDrv: [impSearchSensor][impSearchSensor] Err-ctrlCode (I/O error)
3525:01-12 23:25:58.118   454   454 D ImgSensorDrv: [impSearchSensor]sensor ID mismatch
3526:01-12 23:25:58.118   454   454 D ImgSensorDrv: [impSearchSensor]m_pstSensorInitFunc[i].getCameraDefault is NULL: 4
3527:01-12 23:25:58.118   454   454 D ImgSensorDrv: [impSearchSensor]impSearchSensor search to sub
3528:01-12 23:25:58.119   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =20000
3529:01-12 23:25:58.119   454   454 D ImgSensorDrv: [impSearchSensor][impSearchSensor] Err-ctrlCode (I/O error)
3537:01-12 23:25:58.121   454   454 D ImgSensorDrv: [impSearchSensor]sensor ID mismatch
3538:01-12 23:25:58.121   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =20001
3539:01-12 23:25:58.121   454   454 D ImgSensorDrv: [impSearchSensor][impSearchSensor] Err-ctrlCode (I/O error)
3543:01-12 23:25:58.122   454   454 D ImgSensorDrv: [impSearchSensor]sensor ID mismatch
3544:01-12 23:25:58.122   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =20002
3875:01-12 23:25:58.547   454   454 D ImgSensorDrv: [impSearchSensor][impSearchSensor] Err-ctrlCode (I/O error)
3879:01-12 23:25:58.550   454   454 D ImgSensorDrv: [impSearchSensor]sensor ID mismatch
3880:01-12 23:25:58.550   454   454 D ImgSensorDrv: [impSearchSensor]set sensor driver id =20003
3937:01-12 23:25:58.782   454   454 D ImgSensorDrv: [impSearchSensor]found <0x2509/sp2509mipiraw/SENSOR_DRVNAME_SP2509_MIPI_RAW>
3938:01-12 23:25:58.782   454   454 D ImgSensorDrv: [impSearchSensor]SUB sensor found:[3]/[0x20003]/[0]/[-1]
3939:01-12 23:25:58.782   454   454 D ImgSensorDrv: [impSearchSensor]m_pstSensorInitFunc[i].getCameraDefault is NULL: 4
3940:01-12 23:25:58.782   454   454 D ImgSensorDrv: [impSearchSensor]SENSOR search end: 0x3 /[0x5025][2]/[0xffffff][255]/[0x2509][3]

kernel-3.18/drivers/misc/mediatek/imgsensor/src/mt6735/kd_sensorlist.c

    case KDIMGSENSORIOC_X_SET_DRIVER:i4RetValue = kdSetDriver((unsigned int *)pBuff);break;case KDIMGSENSORIOC_T_CHECK_IS_ALIVE:i4RetValue = adopt_CAMERA_HW_CheckIsAlive();break;int kdSetDriver(unsigned int *pDrvIndex){pSensorList[drvIdx[i]].SensorInit(&g_pInvokeSensorFunc[i]);memcpy((char *)g_invokeSensorNameStr[i], (char *)pSensorList[drvIdx[i]].drvname, sizeof(pSensorList[drvIdx[i]].drvname));//获取摄像头的名字}

kernel-3.18/drivers/misc/mediatek/imgsensor/src/mt6735/camera_hw/kd_camera_hw.c

adopt_CAMERA_HW_CheckIsAlive(void){if(0!=kdModulePowerOn((CAMERA_DUAL_CAMERA_SENSOR_ENUM *)g_invokeSocketIdx, g_invokeSensorNameStr, true, CAMERA_HW_DRVNAME1)){return -EIO;}err = g_pSensorFunc->SensorFeatureControl(g_invokeSocketIdx[i], SENSOR_FEATURE_CHECK_SENSOR_ID, (MUINT8 *)&sensorID, &retLen);//读sensor id
}

kdModulePowerOn调用kdCISModulePowerOn

int kdCISModulePowerOn(CAMERA_DUAL_CAMERA_SENSOR_ENUM SensorIdx, char *currSensorName, bool On, char *mode_name)
{............if(currSensorName && (0 == strcmp(SENSOR_DRVNAME_GC5025_MIPI_RAW, currSensorName))) {if (GPIO_CAMERA_INVALID != pinSet[pinSetIdx][IDX_PS_CMPDN])mtkcam_gpio_set(pinSetIdx, CAMPDN, pinSet[pinSetIdx][IDX_PS_CMPDN + IDX_PS_OFF]);if (GPIO_CAMERA_INVALID != pinSet[pinSetIdx][IDX_PS_CMRST])mtkcam_gpio_set(pinSetIdx, CAMRST, pinSet[pinSetIdx][IDX_PS_CMRST + IDX_PS_OFF]);mdelay(50);/* VCAM_IO */if (TRUE != _hwPowerOn(VCAMIO, VOL_1800)) {PK_DBG("[CAMERA SENSOR] Fail to enable IO power (VCAM_IO),power id = %d\n", VCAMIO);goto _kdCISModulePowerOn_exit_;}mdelay(10);if (TRUE != _hwPowerOn(VCAMD, VOL_1500)) {PK_DBG("[CAMERA SENSOR] Fail to enable digital power (VCAM_D),power id = %d\n", VCAMD);goto _kdCISModulePowerOn_exit_;}mdelay(10);/* VCAM_A */if (TRUE != _hwPowerOn(VCAMA, VOL_2800)) {PK_DBG("[CAMERA SENSOR] Fail to enable analog power (VCAM_A),power id = %d\n", VCAMA);goto _kdCISModulePowerOn_exit_;}mdelay(10);/* AF_VCC */if (TRUE != _hwPowerOn(VCAMAF, VOL_2800)) {PK_DBG("[CAMERA SENSOR] Fail to enable analog power (VCAM_AF),power id = %d\n", VCAMAF);goto _kdCISModulePowerOn_exit_;}mdelay(10);/* enable active sensor */if (GPIO_CAMERA_INVALID != pinSet[pinSetIdx][IDX_PS_CMPDN]) {mtkcam_gpio_set(pinSetIdx, CAMPDN, pinSet[pinSetIdx][IDX_PS_CMPDN + IDX_PS_ON]);mdelay(5);}if (GPIO_CAMERA_INVALID != pinSet[pinSetIdx][IDX_PS_CMRST]) {mtkcam_gpio_set(pinSetIdx, CAMRST, pinSet[pinSetIdx][IDX_PS_CMRST + IDX_PS_ON]);mdelay(5);}}............
}

高版本的内核，摄像头部分稍微有点改动，移植摄像头涉及到这些文件，以mt6761平台移植sp5508为例。

kernel-4.19/arch/arm/boot/dts/cust_mt6761_project_camera.dtsi
kernel-4.19/arch/arm/configs/k61v1_hdp_ref_debug_defconfig
kernel-4.19/arch/arm/configs/k61v1_hdp_ref_defconfig
kernel-4.19/drivers/misc/mediatek/imgsensor/inc/kd_imgsensor.h
kernel-4.19/drivers/misc/mediatek/imgsensor/src/common/v1/imgsensor_sensor_list.c
kernel-4.19/drivers/misc/mediatek/imgsensor/src/common/v1/imgsensor_sensor_list.h
kernel-4.19/drivers/misc/mediatek/imgsensor/src/common/v1/sp5508_mipi_raw/Makefile
kernel-4.19/drivers/misc/mediatek/imgsensor/src/common/v1/sp5508_mipi_raw/sp5508mipi_Sensor.c
kernel-4.19/drivers/misc/mediatek/imgsensor/src/common/v1/sp5508_mipi_raw/sp5508mipi_Sensor.h
kernel-4.19/drivers/misc/mediatek/imgsensor/src/mt6761/camera_project/k61v1_hdp_ref/camera_hw/imgsensor_cfg_table.c

device/mediatek/common/kernel-headers/kd_imgsensor.h
device/mediateksample/k61v1_hdp_ref/ProjectConfig.mk

vendor/mediatek/proprietary/custom/mt6761/hal/imgsensor_src/sensorlist.cpp
vendor/mediatek/proprietary/custom/mt6761/hal/imgsensor_src/cfg_setting_imgsensor.cpp
vendor/mediatek/proprietary/custom/mt6761/hal/imgsensor/sp5508_mipi_raw
vendor/mediatek/proprietary/custom/common/hal/imgsensor_metadata/sensor/sp5508_mipi_raw
vendor/mediatek/proprietary/custom/mt6761/hal/imgsensor_metadata/sp5508_mipi_raw
vendor/mediatek/proprietary/custom/mt6761/hal/sendepfeature/sp5508_mipi_raw

一般来说，摄像头的驱动源码能拿到(平台的耦合性不强)，但摄像头的效果文件在不同的平台上是不通用的，或者同平台在不同的Android版本上也不一定能编译通过，这时需要复制平台的效果文件了，先编译通过，然后让fae去调试效果。具体参考方法参考FAQ22441 或者mtk平台调试总结_Android开发-CSDN博客

metadata

mtk在Android metadata的基础上增加了mtk meatadata，其转换方式可参考

vendor/mediatek/proprietary/hardware/mtkcam/include/mktcam/utils/metadata/client/TagMap.h

。可以通过dumpsys media.camera查看metadata是否生效。注意目前有两种架构的metadata，文档上写着是兼容的，实际调试中也遇到一下问题，最好拿新架构的metadata，遇到不生效的情况，要看下logcat，有没有crash。medata的准确性对过cts比较重要，遇到问题可参考FAQ21242。

对于前后摄像头使用同一款ic的情况，要注意id作假(原始id+/-)，也就是id必须是唯一的。

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