高通Camera移植文档

此文档以在高通8916平台移植OV5648为例，蓝色字体为注释，红色字体为重要点。

文件名：msm8916-camera-sensor-qrd-skui.dtsi

需添加的代码：

qcom,camera@6a {

——这需要与1.3节中添加的Clock地址向对应。

compatible = "ovti,ov5648";

——这要与1.5节中添加的驱动代码中的名字相对应，即：static const struct of_device_id ov5648_dt_match[] = {

{

.compatible = "ovti,ov5648",

.data = &ov5648_s_ctrl

},

reg = ;  

——这需要与1.3节中添加的Clock地址向对应。

qcom,slave-id = ;  

——0x6c为摄像头的I2C地址，0x300a为摄像头存放ID的寄存器地址，0x5648为摄像头的ID，这都需要查看datasheet或直接问模组厂。

qcom,csiphy-sd-index = ;

qcom,csid-sd-index = ;

——以上两个设置需要查看主板原理图，看主板上摄像头是接在CSI0还是CSI1上的，一般后摄像头都会接到CSI0上，前摄像头会接在CSI1上。

qcom,mount-angle = ;

——该参数为摄像头预览界面的方向，如果预览方向有被旋转，可以通过修改这个参数进行修正。

qcom,sensor-name = "ov5648_oty5f03";

——这个对应vendor中lib文件夹的文件名，具体可参看2.2节。

cam_vdig-supply = ;

cam_vana-supply = ;

cam_vio-supply = ;

——以上三个参数分别对应DVDD（vdig）、AVDD（vana）、DOVDD（vio）三个电压，具体所接的是哪路电压，需要参看主板原理图。

qcom,cam-vreg-name = "cam_vdig", "cam_vio", "cam_vana";

qcom,cam-vreg-type = ;

qcom,cam-vreg-min-voltage = ;

qcom,cam-vreg-max-voltage = ;

qcom,cam-vreg-op-mode = ;

——这五个配置要分别与上面的三个电压一一对应（按照从上到下的顺序），如果有对焦马达的还要在后面填一路AF的电压，如下所示：

cam_vaf-supply = ;

qcom,cam-vreg-name = "cam_vdig", "cam_vio", "cam_vana",

 "cam_vaf";

qcom,cam-vreg-type = ;

qcom,cam-vreg-min-voltage = ;

qcom,cam-vreg-max-voltage = ;

qcom,cam-vreg-op-mode = ;

pinctrl-names = "cam_default", "cam_suspend";

pinctrl-0 = ;

pinctrl-1 = ;

——以上这两个需要区分的就是前后摄像头的配置不一样，上面这种配置是前摄像头的配置，后摄像头的配置如下所示：

pinctrl-names = "cam_default", "cam_suspend";

pinctrl-0 = ;

pinctrl-1 = ;

gpios = ,

,

,

;               

qcom,gpio-reset = ;

qcom,gpio-standby = ;

qcom,gpio-vana = ;

qcom,gpio-req-tbl-num = ;

qcom,gpio-req-tbl-flags = ;

qcom,gpio-req-tbl-label = "CAMIF_MCLK",

"CAM_RESET",

"CAM_STANDBY",

"CAM_VANA";

——上面这部分主要是配置GPIO口，这里需要注意的是gpios的数组要与gpio-req-tbl-label的名字一一对应，即gpio 27对应CAMIF_MCLK，而reset 、standby 、vana 分别对应gpios数组中的第1、2、3参数，gpio-req-tbl-num也对应于gpios中数组的标号。

qcom,gpio-set-tbl-num = ;

qcom,gpio-set-tbl-flags = ;

qcom,gpio-set-tbl-delay = ;

——这三个参数是前摄像头的固定模式，后摄像头不需要这个设置，在配置后摄像头时直接去掉即可。

qcom,csi-lane-assign = ;

——该参数为主芯片mipi Lane个数配置寄存器。

qcom,csi-lane-mask = ;

——该参数为配置mipi Lane个数，0x3为1组数据线加1组时钟线，0x07为2组数据线加1组时钟线，0x1f为4组数据线加1主时钟线。

qcom,sensor-position = ;

——该参数，如果添加的是前摄像头需要配置成1，如果是后摄像头需要配置成0

qcom,sensor-mode = ;

qcom,cci-master = ;

status = "ok";

clocks = ,

;

clock-names = "cam_src_clk", "cam_clk";

——上面两个Clocks和Clock-names是前摄像头的配置，后摄像头的配置如下：

clocks = ,

;

clock-names = "cam_src_clk", "cam_clk";

};

另外如果有对焦马达还需要修改对焦马达的地址，如下所示：

actuator0: qcom,actuator@6e {

cell-index = ;

reg = ;

compatible = "qcom,actuator";

qcom,cci-master = ;

};

代码路径：srcLINUXandroidkernelarcharmconfigs

文件名：msm8916_defconfig 和msm8916-perf_defconfig

需添加的代码：

CONFIG_OV5648=y

代码路径：srcLINUXandroidkernelarcharmmach-msm

文件名：clock-8226.c

需添加的代码：

/* MM sensor clocks */

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6f.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk1_clk_src.c, "90.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6d.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6a.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "6c.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "20.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "78.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6f.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk1_clk.c, "90.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6d.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6a.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "6c.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "78.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "20.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "62.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "62.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "0.qcom,camera"),

CLK_LOOKUP("cam_src_clk", mclk0_clk_src.c, "1.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "0.qcom,camera"),

CLK_LOOKUP("cam_clk", camss_mclk0_clk.c, "1.qcom,camera"),

需要注意的是这里的标示（如：6a）不能重复，并且添加的时候需要同时添加一组代码，即上面红色标示的地方。

代码路径：srcLINUXandroidkerneldriversmediaplatformmsmcamera_v2（Kconfig路径），srcLINUXandroidkerneldriversmediaplatformmsmcamera_v2sensor（Makefile路径）

文件名：Kconfig和Makefile

需添加的代码：

添加Kconfig：

config OV5648

bool "Sensor OV5648 (BAYER 5M)"

depends on MSMB_CAMERA

---help---

OmniVision 5 MP Bayer Sensor, only use 1 mipi lane,

preview set to 1296*972 at 30 fps,

snapshot set to 2592*1944 at 12 fps,

This sensor driver does not support auto focus.

   添加Makefile：

obj-$(CONFIG_OV5648) += ov5648.o

代码路径：srcLINUXandroidkerneldriversmediaplatformmsmcamera_v2sensor

文件名：ov5648.c

需添加的代码：

该部分主要要注意电源的设置，它包括传感器电源信息，IO控制和Mclk。通常情况下，无需修改该部分内容，因为大部分配置已在设备树文件中完成；但可以修改.delay = 0 字段来和时间匹配。

static struct msm_sensor_power_setting ov5648_power_setting[] = {

{

.seq_type = SENSOR_VREG,

.seq_val = CAM_VIO,

.config_val = 0,

.delay = 0,

},

{

      .seq_type = SENSOR_VREG,

      .seq_val = CAM_VAF,

      .config_val = 0,

      .delay = 5,

},

{

.seq_type = SENSOR_GPIO,

.seq_val = SENSOR_GPIO_VDIG,

.config_val = GPIO_OUT_LOW,

.delay = 5,

},

{

.seq_type = SENSOR_GPIO,

.seq_val = SENSOR_GPIO_VDIG,

.config_val = GPIO_OUT_HIGH,

.delay = 5,

},

{

.seq_type = SENSOR_GPIO,

.seq_val = SENSOR_GPIO_VANA,

.config_val = GPIO_OUT_HIGH,

.delay = 5,

},

{

.seq_type = SENSOR_GPIO,

.seq_val = SENSOR_GPIO_STANDBY,

.config_val = GPIO_OUT_LOW,

.delay = 5,

},

{

.seq_type = SENSOR_GPIO,

.seq_val = SENSOR_GPIO_STANDBY,

.config_val = GPIO_OUT_HIGH,

.delay = 10,

},

{

.seq_type = SENSOR_GPIO,

.seq_val = SENSOR_GPIO_RESET,

.config_val = GPIO_OUT_LOW,

.delay = 5,

},

{

.seq_type = SENSOR_GPIO,

.seq_val = SENSOR_GPIO_RESET,

.config_val = GPIO_OUT_HIGH,

.delay = 10,

},

{

.seq_type = SENSOR_CLK,

.seq_val = SENSOR_CAM_MCLK,

.config_val = 23880000,

.delay = 10,

},

{

.seq_type = SENSOR_I2C_MUX,

.seq_val = 0,

.config_val = 0,

.delay = 0,

},

};

static struct msm_sensor_power_setting ov5648_power_down_setting[] = {

{

     .seq_type = SENSOR_VREG,

     .seq_val = CAM_VIO,

     .config_val = 0,

     .delay = 0,

},

{

     .seq_type = SENSOR_VREG,

     .seq_val = CAM_VAF,

     .config_val = 0,

     .delay = 5,

},

  {

    .seq_type = SENSOR_GPIO,

    .seq_val = SENSOR_GPIO_VANA,

    .config_val = GPIO_OUT_LOW,

    .delay = 5,

  },

    {

    .seq_type = SENSOR_GPIO,

    .seq_val = SENSOR_GPIO_STANDBY,

    .config_val = GPIO_OUT_LOW,

    .delay = 5,

  },

  {

    .seq_type = SENSOR_GPIO,

    .seq_val = SENSOR_GPIO_RESET,

    .config_val = GPIO_OUT_LOW,

    .delay = 10,

  },

  {

    .seq_type = SENSOR_CLK,

    .seq_val = SENSOR_CAM_MCLK,

    .config_val = 23880000,

    .delay = 10,

  },

  {

    .seq_type = SENSOR_I2C_MUX,

    .seq_val = 0,

    .config_val = 0,

    .delay = 0,

  },

};

代码路径：srcLINUXandroidvendorqcomproprietarycommonconfig

文件名：device-vendor.mk

需添加的代码：

MM_CAMERA += libchromatix_ov5648_oty5f03_common

MM_CAMERA += libchromatix_ov5648_oty5f03_default_video

MM_CAMERA += libchromatix_ov5648_oty5f03_preview

MM_CAMERA += libchromatix_ov5648_oty5f03_snapshot

MM_CAMERA += libchromatix_ov5648_oty5f03_zsl

MM_CAMERA += libmmcamera_ov5648_oty5f03

注意：如果这里没有添加以上代码，在编译的时候就不会生成相应的so文件。这so文件可以在srcLINUXandroidouttargetproductmsm8916_32systemvendorlib目录下找到，如下所示:

libchromatix_ov5648_oty5f03_common.so

libchromatix_ov5648_oty5f03_default_video.so

libchromatix_ov5648_oty5f03_preview.so

libchromatix_ov5648_oty5f03_snapshot.so

libchromatix_ov5648_oty5f03_zsl.so

libmmcamera_ov5648_oty5f03.so

代码路径：

srcLINUXandroidvendorqcomproprietarymm-cameramm-camera2media-controllermodulessensorssensor_libs

文件夹名：ov5648_oty5f03

需添加的代码：

2.2.1   移植相机接口配置

这部分内容定义了传感器接口配置，包括 I2C和 MIPI。请确认设置不会和 dtsi文件中的类似内容冲突。

static struct msm_camera_sensor_slave_info sensor_slave_info = {

  /* Camera slot where this camera is mounted */

  .camera_id = CAMERA_0,

  /* sensor slave address */

  .slave_addr = 0x6c,

  /* sensor address type */

  .addr_type = MSM_CAMERA_I2C_WORD_ADDR,

  /* sensor id info*/

  .sensor_id_info = {

    /* sensor id register address */

    .sensor_id_reg_addr = 0x300a,

    /* sensor id */

    .sensor_id = 0x5648,

  },

  /* power up / down setting */

  .power_setting_array = {

    .power_setting = ov5648_oty5f03_power_setting,

    .size = ARRAY_SIZE(ov5648_oty5f03_power_setting),

    .power_down_setting = ov5648_oty5f03_power_down_setting,

    .size_down = ARRAY_SIZE(ov5648_oty5f03_power_down_setting),

  },

};

static sensor_output_t sensor_output = {

  .output_format = SENSOR_BAYER,

  .connection_mode = SENSOR_MIPI_CSI,

  .raw_output = SENSOR_10_BIT_DIRECT,

};

#ifndef VFE_40

static struct csi_lane_params_t csi_lane_params = {

  .csi_lane_assign = 0xE4,

  .csi_lane_mask = 0x3,

  .csi_if = 1,

  .csid_core = {0},

  .csi_phy_sel = 0,

};

#else

static struct csi_lane_params_t csi_lane_params = {

  .csi_lane_assign = 0x4320,

  .csi_lane_mask = 0x3,

  .csi_if = 1,

  .csid_core = {0},

  .csi_phy_sel = 1,

};

#endif

2.2.2  移植传感器输出配置

这部分内容介绍了传感器不同模式的配置和设置，包含各模式的 I2C 寄存器设备、CSI参数、crop参数、传感器输出信息和chormatix数组。这些配置的数组大小应和传感器支持的模式种类相同。

static struct msm_camera_i2c_reg_setting res_settings[] = {

  {

    .reg_setting = res0_reg_array,

    .size = ARRAY_SIZE(res0_reg_array),

    .addr_type = MSM_CAMERA_I2C_WORD_ADDR,

    .data_type = MSM_CAMERA_I2C_BYTE_DATA,

    .delay = 0,

  },

  {

    .reg_setting = res1_reg_array,

    .size = ARRAY_SIZE(res1_reg_array),

    .addr_type = MSM_CAMERA_I2C_WORD_ADDR,

    .data_type = MSM_CAMERA_I2C_BYTE_DATA,

    .delay = 0,

  },

};

……

static struct msm_camera_csi2_params *csi_params[] = {

  &ov5648_oty5f03_csi_params, /* RES 0*/

  &ov5648_oty5f03_csi_params, /* RES 1*/

};

……

static struct sensor_crop_parms_t crop_params[] = {

  {0, 0, 0, 0}, /* RES 0 */

  {0, 0, 0, 0}, /* RES 1 */

};

……

static struct sensor_lib_out_info_t sensor_out_info[] = {

  {

    .x_output = 2592,

    .y_output = 1944,

    .line_length_pclk = 2816,

    .frame_length_lines = 2380,

    .vt_pixel_clk = 84000000,

    .op_pixel_clk = 84000000,

    .binning_factor = 1,

    .max_fps = 12.5,

    .min_fps = 7.5,

    .mode = SENSOR_DEFAULT_MODE,

  },

  {

    .x_output = 1296,

    .y_output = 972,

    .line_length_pclk = 1408,

    .frame_length_lines = 992,

    .vt_pixel_clk = 42000000,

    .op_pixel_clk = 42000000,

    .binning_factor = 1,

    .max_fps = 30.0,

    .min_fps = 7.5,

    .mode = SENSOR_DEFAULT_MODE,

  },

};

……

static struct sensor_lib_chromatix_t ov5648_oty5f03_chromatix[] = {

  {

    .common_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(common),

    .camera_preview_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(snapshot), /* RES0 */

    .camera_snapshot_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(snapshot), /* RES0 */

    .camcorder_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(default_video), /* RES0 */

  },

  {

    .common_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(common),

    .camera_preview_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(preview), /* RES2 */

    .camera_snapshot_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(preview), /* RES2 */

    .camcorder_chromatix = OV5648_OTY5F03_LOAD_CHROMATIX(default_video), /* RES2 */

  },

};

2.2.3  镜头信息移植

相机处理流程(比如曝光计算)需要镜头信息。因此，以下结构需添加正确的镜头信息。

static sensor_lens_info_t default_lens_info = {

  .focal_length = 2.37,

  .pix_size = 1.4,

  .f_number = 2.4,

  .total_f_dist = 1.97,

  .hor_view_angle = 70.24,

  .ver_view_angle = 52.68,

};

2.2.4   曝光配置移植

通常情况下，不同传感器有不同的曝光控制方式。所以，当传感器打开后，需移植曝光配置以成功调试传感器的曝光控制。

包括以下函数：

n  ov5648_real_to_register_gain – 将实际逻辑增益转换为寄存器值。

n  ov5648_register_to_real_gain – 将寄存器值转换成真实的逻辑增益。

n  ov5648_calculate_exposure – 获取曝光时间和增益的另一个曝光配置.

n  ov5648_fill_exposure_array – 准备另一个曝光配置数组。

代码路径：

srcLINUXandroidvendorqcomproprietarymm-cameramm-camera2media-controllermodulessensorschromatix0301libchromatix

文件夹名：chromatix_ov5648_oty5f03

需添加的代码：

该部分主要是针对raw格式是摄像头，而yuv格式的摄像头不需要做该步骤，而这添加的内容主要是raw摄像头效果参数的.h文件，这需要向模组或IC厂索要该部分的文件。