Android L 5.1.1 Rear Camera

Coming back!

接着上一篇，我们基于AISTARVISION MIPI CSI Adapter V2.0继续分享ov5645 rear camera的porting方法。因为在DB410c的android L 5.1.1系统中默认带有ov5645的sensor driver，所以同学们对于这一颗sensor只需要修改configuration就ok了。

1. kernel部分修改camera cci dtsi文件，我截取了需要修改的字段，

qcom,camera@78 {

               compatible = "ovti,ov5645";

               qcom,csiphy-sd-index = <0>;                             /*should contain csiphy instance that will used toreceive sensor data*/

               qcom,csid-sd-index = <0>;                                 /*should contain csid core instance that will used toreceive sensor data*/

               gpios= <&msm_gpio 26 0>,

                            <&msm_gpio 35 0>,

                            <&msm_gpio 34 0>;         /*should contain phandle to gpio controller node and array of #gpio-cells specifying specific gpio (controller specific)*/

               qcom,csi-lane-assign = <0x4320>;                    /*should contain lane assignment value to map CSIPHYlanes to CSID lanes*/

               qcom,csi-lane-mask = <0x3>;                            /*should contain lane mask that specifies CSIPHY lanes tobe enabled*/

               qcom,sensor-position = <0>;                             /*should contain the mount angle of the camera sensor*/ /*0 -> back camera  1 -> front camera*/

               qcom,sensor-mode = <0>;           /*should contain sensor mode supported*/ /*0 -> back camera 2D  1 -> front camera 2D  2 -> back camera 3D  3 -> back camera int 3D*/

               qcom,cci-master = <0>;                                     /*should contain i2c master id to be used for this camerasensor*/

               clocks = <&clock_gcc clk_mclk0_clk_src>, <&clock_gcc clk_gcc_camss_mclk0_clk>;

               clock-names = "cam_src_clk", "cam_clk";      /*name of the clocks required for the device*/

        };

2. user space部分修改ov5645_lib.c，这里也同样截取需要修改的字段，字段的意思比较容易理解，我就不额外加注释了。

static struct msm_sensor_init_params sensor_init_params = {

      .modes_supported =1,

      .position = 0,

      .sensor_mount_angle= 0,

};

static struct csi_lane_params_t csi_lane_params = {

      .csi_lane_assign =0x4320,

      .csi_lane_mask =0x7,

      .csi_if = 1,

      .csid_core = {0},

      .csi_phy_sel = 0,

};

static struct msm_camera_csi2_params ov5645_csi_params = {

      .csid_params = {

        .lane_cnt = 2,

      },

      .csiphy_params = {

        .lane_cnt = 2,

        .settle_cnt = 29,

      },

};

3. 通过以上两部分对ov5645 sensor configuration file的修改，再结合上篇博文的AISTARVISION MIPI CSI Adapter V2.0的硬件连接说明，“如果使用rear camera，sensor连接到J3 connector，J13就只需要用跳线帽（pin19连pin20，pin21连pin22）即可。”大家就可以看到Rear Camera的图像啦！share两张靓照

第一张是拍摄到影像的屏幕截图，这清晰度有点……，第二张是AISTARVISION MIPI Adapter V2.0, camera接在J3 connector。

OK，这篇博文就先写到这，后续我们会有更多的camera sensor porting的案例（包括3A tuning）和machine vision的系统方案share给大家，see you next time.