MTK camera设备树及相关驱动调试

1.cust_mt6771_camera.dtsi修改

这个设备树文件主要配置相机的reset，powerdown，avdd，dvdd，dovdd，clk引脚信息，已经配置了一些相机信息，我们调试时需要根据需求进行修改

reset和powerdown引脚配置

    camera_pins_cam0_rst_0: cam0@0 {pins_cmd_dat {pinmux = <PINMUX_GPIO101__FUNC_GPIO101>;slew-rate = <1>;output-low;};};camera_pins_cam0_rst_1: cam0@1 {pins_cmd_dat {pinmux = <PINMUX_GPIO101__FUNC_GPIO101>;slew-rate = <1>;output-high;};};camera_pins_cam0_pnd_0: cam0@2 {pins_cmd_dat {pinmux = <PINMUX_GPIO97__FUNC_GPIO97>;slew-rate = <1>;output-low;};};camera_pins_cam0_pnd_1: cam0@3 {pins_cmd_dat {pinmux = <PINMUX_GPIO97__FUNC_GPIO97>;slew-rate = <1>;output-high;};};

根据原理图配置相应引脚，一般默认0为主摄像头，1为前摄像头

avdd，dvdd，dovdd引脚配置

根据硬件原理图分析引脚是GPIO供电或系统供电

（这里示例配置avdd、dvddGPIO供电，dovdd系统供电）

GPIO供电：

 camera_pins_cam0_vcama_0: cam0@vcam0 {pins_cmd_dat {pinmux = <PINMUX_GPIO17__FUNC_GPIO17>;slew-rate = <1>;output-low;};};camera_pins_cam0_vcama_1: cam0@vcam1 {pins_cmd_dat {pinmux = <PINMUX_GPIO17__FUNC_GPIO17>;slew-rate = <1>;output-high;};};camera_pins_cam0_vcamd_0: cam0@vcam2 {pins_cmd_dat {pinmux = <PINMUX_GPIO178__FUNC_GPIO178>;slew-rate = <1>;output-low;};};camera_pins_cam0_vcamd_1: cam0@vcam3 {pins_cmd_dat {pinmux = <PINMUX_GPIO178__FUNC_GPIO178>;slew-rate = <1>;output-high;};};

系统供电：

 cam0_vcamio-supply = <&mt_pmic_vcamio_ldo_reg>;

clk引脚配置

    camera_pins_cam0_mclk_off: camera_pins_cam0_mclk_off {pins_cmd_dat {pinmux = <PINMUX_GPIO99__FUNC_GPIO99>;drive-strength = <1>;};};camera_pins_cam0_mclk_2ma: camera_pins_cam0_mclk_2ma {pins_cmd_dat {pinmux = <PINMUX_GPIO99__FUNC_CMMCLK0>;drive-strength = <0>;};};camera_pins_cam0_mclk_4ma: camera_pins_cam0_mclk_4ma {pins_cmd_dat {pinmux = <PINMUX_GPIO99__FUNC_CMMCLK0>;drive-strength = <1>;};};camera_pins_cam0_mclk_6ma: camera_pins_cam0_mclk_6ma {pins_cmd_dat {pinmux = <PINMUX_GPIO99__FUNC_CMMCLK0>;drive-strength = <2>;};};camera_pins_cam0_mclk_8ma: camera_pins_cam0_mclk_8ma {pins_cmd_dat {pinmux = <PINMUX_GPIO99__FUNC_CMMCLK0>;drive-strength = <3>;};};

硬件引脚关联配置

引脚配置的数量必须和上面配置的引脚一致，dws配置文件中相关GPIO模式设置正确；

&kd_camera_hw1 {pinctrl-names = "default","cam0_rst0", "cam0_rst1","cam0_pnd0", "cam0_pnd1","cam1_rst0", "cam1_rst1","cam1_pnd0", "cam1_pnd1","cam2_rst0", "cam2_rst1","cam2_pnd0", "cam2_pnd1","cam0_ldo_vcama_0", "cam0_ldo_vcama_1","cam0_ldo_vcamd_0", "cam0_ldo_vcamd_1","cam2_ldo_vcamd_0", "cam2_ldo_vcamd_1","cam2_ldo_vcama_0", "cam2_ldo_vcama_1","cam0_mclk_off","cam0_mclk_2mA", "cam0_mclk_4mA","cam0_mclk_6mA", "cam0_mclk_8mA","cam1_mclk_off","cam1_mclk_2mA", "cam1_mclk_4mA","cam1_mclk_6mA", "cam1_mclk_8mA","cam2_mclk_off","cam2_mclk_2mA", "cam2_mclk_4mA","cam2_mclk_6mA", "cam2_mclk_8mA";pinctrl-0 = <&camera_pins_default>;pinctrl-1 = <&camera_pins_cam0_rst_0>;pinctrl-2 = <&camera_pins_cam0_rst_1>;pinctrl-3 = <&camera_pins_cam0_pnd_0>;......pinctrl-33 = <&camera_pins_cam2_mclk_4ma>;pinctrl-34 = <&camera_pins_cam2_mclk_6ma>;pinctrl-35 = <&camera_pins_cam2_mclk_8ma>;cam0_vcamio-supply = <&mt_pmic_vcamio_ldo_reg>;cam1_vcama-supply = <&mt_pmic_vcama2_ldo_reg>;cam1_vcamd-supply = <&mt_pmic_vcamd_ldo_reg>;cam1_vcamio-supply = <&mt_pmic_vcamio_ldo_reg>;cam2_vcamio-supply = <&mt_pmic_vcamio_ldo_reg>;status = "okay";
};

2.imgsensor_cfg_table.c文件配置

这个文件主要配置相机供电引脚(avdd,dvdd,dovdd)属性，根据硬件原理图判断：

GPIO控制的引脚使用宏：IMGSENSOR_HW_ID_GPIO

系统供电的引脚使用宏：IMGSENSOR_HW_ID_REGULATOR

其他引脚配置一般不变，cust_mt6771_camera.dtsi中的相机编号和这里的DEV_NO一一对应；

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},{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_REGULATOR},{IMGSENSOR_HW_PIN_DOVDD, IMGSENSOR_HW_ID_REGULATOR},{IMGSENSOR_HW_PIN_DVDD,  IMGSENSOR_HW_ID_REGULATOR},{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_MAIN2,IMGSENSOR_I2C_DEV_1,{......},},{IMGSENSOR_SENSOR_IDX_SUB2,IMGSENSOR_I2C_DEV_1,{......},},{IMGSENSOR_SENSOR_IDX_MAIN3,IMGSENSOR_I2C_DEV_1,{......},},{IMGSENSOR_SENSOR_IDX_NONE}
};

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