APQ8064 camera AF 调试

1. info

Module: sunny

Sensor: imx091

Platform:APQ8064

Actuator:VCM

VCM driver IC: dw9714A

2.调试步骤

(1)VCM供电正常

(2)VCM diver IC i2c通信正常

a)保证 VCM diver IC处于正常工作模式

VCM drver IC SPEC(供电/PWDN脚)

b）将VCM dirver IC注册为i2c devices.

只需在kernel/arch/arm/mach-msm/board-8064-camera.c中配置好sensor使用的actuator

的info，如下。APQ8064/MSM8x25 camera模块sensor通用的接口已经写好在

kernel/driver/media/video/msm/sensors/msm_sensor.c中.

在其中的msm_sensor_i2c_probe会根据在board配置信息注册VCMdriver IC到i2c总线上.

（msm_sensor_i2c_probe在注册sensori2c驱动时调用）

static struct i2c_board_info msm_act_main_cam1_i2c_info = {
    I2C_BOARD_INFO("msm_actuator", 0x18),
};

static struct msm_actuator_info msm_act_main_cam_1_info = {
    .board_info     = &msm_act_main_cam1_i2c_info,
    .cam_name       = MSM_ACTUATOR_MAIN_CAM_1,
    .bus_id         = APQ_8064_GSBI4_QUP_I2C_BUS_ID,
    .vcm_pwd        = CAMR_VCM_PWD_ODM,
    .vcm_enable     = 1,
};

static struct msm_camera_sensor_info msm_camera_sensor_imx091_data = {
    .sensor_name    = "imx091",
    .pdata  = &msm_camera_csi_device_data[0],
    .flash_data = &flash_imx091,
    .sensor_platform_info = &sensor_board_info_imx091,
    .csi_if = 1,
    .camera_type = BACK_CAMERA_2D,
    .sensor_type = BAYER_SENSOR,
    .actuator_info = &msm_act_main_cam_1_info,
//  .eeprom_info = &imx091_eeprom_info,
};

c）将设备驱动注册上总线上.

APQ8064/MSM8x25camera模块actuator有通用驱动文件，为

kernel/driver/media/video/msm/sensors/msm_actuator.c

只需在board配置actuator信息时，设备名写为msm_actuator（驱动才能和设备对应上）

保证驱动文件被编译到内核（CONFIG_MSM_ACTUATOR）

(3)af_tuning_params文件

明确相应的AF驱动IC使用的是哪个af_tuning_params文件(af_main_cam_X.h)，

文件路径vendor/qcom/proprietary/mm-camera/server/hardware/actuator/0208/8960/.

在board配置actuator信息时,以下cam_name的值要和af_main_cam_X.h文件中/*cam_name */相同。

staticstruct msm_actuator_info XXX = {

.cam_name =MSM_ACTUATOR_MAIN_CAM_1,

};

(4)对焦常见问题

a)i2c工作正常，但对焦没有明显lens拉伸过程,需要改动af_tuning_params文件中的

/*region_params */

{
/*step_bound[0] - macro side boundary */
/*step_bound[1] - infinity side boundary */
/*Region 1 */
{
   .step_bound= {3, 0},
   .code_per_step= 56,
},
/*Region 2 */
{
   .step_bound= {41, 3},
   .code_per_step= 8,
},
},

b)对焦是否启用闪光灯

1,/* LED AF Assist Enable */