基础：高通bring up camera【转】

本文转载自：http://blog.csdn.net/liwei16611/article/details/53056710

bring UP 需要做的工作

1、kernelspace

sensor driver ： 驱动和设备树

2、userspace

camera 对应的chromatix library 和sensor  library

准备工作

1、模组原理图

2、sensor spec

3、sensor resolution

代码准备

1、kernel

1、设备树

kernel/arch/arm/boot/***-camera-sensor-cdp.dtsi

qcom,camera@20 {

compatible =“qcom,imx111”;

reg = <0x20>;

qcom,slave-id =<0x20 0x0 0x111>; //(slave id – 0x20, chip id address – 0x0, chip id –0x111)

qcom,csiphy-sd-index= <0>; //(Use CSIPHY subdev 0)

qcom,csid-sd-index= <0>; //(Use CSID subdev 0)

qcom,flash-src-index= <&led_flash0>; //(Use LED flash subdev 0)

qcom,mount-angle =<90>; //(mount angle 90 degree)

qcom,sensor-name =“imx111”;// (sensor name)

cam_vdig-supply =<&pm8941_l3>;// (Use L3 for VDIG)

cam_vana-supply =<&pm8941_l23>;// (Use L23 for VANA)

cam_vio-supply =<&pm8941_lvs2>; //(Use LVS3 for VIO)

cam_vaf-supply =<&pm8941_l17>; //(Use L17 for VAF)

qcom,cam-vreg-name= “cam_vdig”, “cam_vio”, “cam_vana”, “cam_vaf”;

qcom,cam-vreg-type= <0 1 0 0>; //(0 – LDO, 1 – LVS)

qcom,cam-vreg-min-voltage= <1225000 0 2850000 2850000>;// (min voltage)

qcom,cam-vreg-max-voltage= <1225000 0 2850000 2850000>;// (max voltage)

qcom,cam-vreg-op-mode= <105000 0 80000 100000>; //(Optimum mode)

qcom,gpio-no-mux =<0>;

gpios =<&msmgpio 15 0>, <&msmgpio 90 0>;

qcom,gpio-reset =<1>; //(Use gpio pin 90 for reset)

qcom,gpio-req-tbl-num= <0 1>; //(0 – pin 15, 1 – pin 90)

qcom,gpio-req-tbl-flags= <1 0>; //(0 – output gpio, 1 – input gpio)

qcom,gpio-req-tbl-label= “CAMIF_MCLK”, “CAM_RESET1”; //(gpio name)

qcom,gpio-set-tbl-num= <1 1>;// (1 – pin 90)

qcom,gpio-set-tbl-flags= <0 2>; //(0 – GPIOF_OUT_INIT_LOW, 2 -

GPIOF_OUT_INIT_HIGH)

qcom,gpio-set-tbl-delay= <1000 4000>; //(delay in micro sec)

qcom,csi-lane-assign= <0x4320>; //(Use 0x4320 for CSI lane assign)

qcom,csi-lane-mask= <0x1F>; //(Use 0x1F for lane mask)

qcom,sensor-position= <0>; //(0 – back camera, 1 – front camera)

qcom,sensor-mode =<1>;// (1 – 2D, 3 – 3D)

qcom,cci-master =<0>; //(0 – Master 0, 1 – Master 1)

status = “ok”;

};

2、驱动

kernel/drivers/media/platform/msm/camera_v2/sensor/imx111.c

vendor（chromatix library）

1、vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/chromatix/0301/libchromatix/chromatix_imx111/

使用高通的chromatix  tunning 软件生成头文件。

2、vendor/qcom/proprietary/mm-camera/mm-camera2/media-controller/modules/sensors/sensor_libs/imx111/

需要配置以下信息：

1）init, start, stop寄存器配置

2）coarse_int_time_addr 、global_gain_addr 寄存器地址

3）x_output 、y_output、line_length_pclk 、frame_length_lines 寄存器地址

4）full/half resolution 寄存器配置

5）配置每个every resolution 对应的Chromatix library

6）配置每个resolution 对应的sensor_out_info

structsensor_lib_out_info_t sensor_out_info[] = {

{

.x_output = 0x0668,

.y_output = 0x04D0,

.line_length_pclk = 0xDD0,

.frame_length_lines = 0x04E6,

.vt_pixel_clk = 134400000,

.op_pixel_clk = 134400000,

.max_fps = 30,

.min_fps = 7.5,

.binning_factor = 1,

.mode = SENSOR_DEFAULT_MODE,

},

调试

1、测量camera的Power supply： AVDD, DOVDD, DVDD, AFVDD是否正确

2、测量MCLK波形是否正常

3、测量camera的PWDN/RESET是否正常