OV8858主要信息

1.供电

key specifications (typical)
active array size: 3264 x 2448
power supply:
analog: 2.6 to 3.0V (2.8V nominal)
core: 1.14 to 1.26V (1.2V nominal)
I/O: 1.7 to 3.0V (1.8V or 2.8V nominal)

2.如何判断驱动中摄像头配置是 RAW 还是 SOC 类型?

如果驱动中 xxxx_enum_mbus_code 配置为 MEDIA_BUS_FMT_UYVY/YUYV/VYUY 等,则为SOC 摄像头;如果需要调试效果,找对应 Sensor 原厂。

如果驱动中 xxxx_enum_mbus_code 配置为 MEDIA_BUS_FMT_SBGGR/SRGGB/SGBRG 等,则为 RAW 摄像头,

设备树修改

1.添加对应的i2c设备

&i2c1{
   status = "okay";
   clock-frequency = <400000>;
   ov8858: ov8858@36 {
       compatible = "ovti,ov8858";
       reg = <0x36>;
       clocks = <&cru SCLK_CIF_OUT>;
       clock-names = "xvclk";
       /* avdd-supply = <>; */ /*硬件pwm供电，软件不需要配置*/
       /* dvdd-supply = <>; */
       /* dovdd-supply = <>; */
       /* flash-leds = <>; */
       pinctrl-names = "rockchip,camera_default";
       pinctrl-0 = <&cif_clkout>;
       //power-gpio = <&gpio2 RK_PB4 cc>;/*硬件pwm供电，软件不需要配置*/
       reset-gpios = <&gpio2 RK_PD3 GPIO_ACTIVE_LOW>; /*重启设备*/
       pwdn-gpios = <&gpio2 RK_PB4 GPIO_ACTIVE_LOW>; /*复位设备寄存器*/
       rockchip,camera-module-index = <0>;
       rockchip,camera-module-mclk-name = "clk_cif_out";
       rockchip,camera-module-facing = "front";
       rockchip,camera-module-name = "CameraKing";
       rockchip,camera-module-lens-name = "Largan-9569A2";
       //power-domains = <&power RK3399_PD_VIO>;
       port {
           ov8858_out: endpoint {
               remote-endpoint = <&mipi_in_ucam0>;
               data-lanes = <1 2 3 4>;
           };
       };
   };
};

&mipi_dphy_rx0{
   status = "okay";

   ports {
       #address-cells = <1>;
       #size-cells = <0>;

       port@0 {
           reg = <0>;
           #address-cells = <1>;
           #size-cells = <0>;

           mipi_in_ucam0: endpoint@1 {
               reg = <1>;
               remote-endpoint = <&ov8858_out>;
               data-lanes = <1 2 3 4>;
           };
       };

       port@1 {
           reg = <1>;
           #address-cells = <1>;
           #size-cells = <0>;

           dphy_tx1rx1_out: endpoint@0 {
               reg = <0>;
               remote-endpoint = <&isp0_mipi_in>;
           };
       };
   };
};

&rkisp1_0{

   status = "okay";
   port {
       #address-cells = <1>;
       #size-cells = <0>;

       isp0_mipi_in: endpoint@0 {
           reg = <0>;
           remote-endpoint = <&dphy_tx1rx1_out>;
        };
   };
};

&isp0_mmu{ /* rkisp1_0中指定了iommus = <&isp0_mmu> */
    status = "okay";
};

其他的一些修改

&pinctrl {

        isp {

                cif_clkout: cif-clkout {

                        rockchip,pins =

                        /*cif_clkout*/

                        <2 11 RK_FUNC_3 &pcfg_pull_none>;

                };

-               bat_detect_gpio: bat-detect-gpio {
+               /*bat_detect_gpio: bat-detect-gpio { /*去除一些重复的引脚，以免出问题*/
                        rockchip,pins = <2 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
                };
+               */

&io_domains {
        status = "okay";
-       bt656-supply = <&vcc_3v0>;
+       bt656-supply = <&vcc1v8_dvp>;
        audio-supply = <&vcca1v8_codec>;
        sdmmc-supply = <&vccio_sd>;
        gpio1830-supply = <&vcc_3v0>;

添加编译设置

路径：arch/arm64/configs/tab23_rk99_fr_gen2_defconfig

-# CONFIG_VIDEO_OV8858 is not set
+CONFIG_VIDEO_OV8858=y

路径：drivers/media/i2c/Kconfig

config VIDEO_OV8858
        tristate "OmniVision OV8858 sensor support"
        depends on I2C && VIDEO_V4L2
        depends on MEDIA_CAMERA_SUPPORT
+       default y

修改上电时序

 static int __ov8858_power_on(struct ov8858 *ov8858)}if (!IS_ERR(ov8858->reset_gpio))
-               gpiod_set_value_cansleep(ov8858->reset_gpio, 0);
-
+               gpiod_set_value_cansleep(ov8858->reset_gpio, 1);
+       if (!IS_ERR(ov8858->pwdn_gpio))
+               gpiod_set_value_cansleep(ov8858->pwdn_gpio, 1);ret = regulator_bulk_enable(OV8858_NUM_SUPPLIES, ov8858->supplies);if (ret < 0) {dev_err(dev, "Failed to enable regulators\n");goto disable_clk;}
-
+       usleep_range(2500, 3000);if (!IS_ERR(ov8858->reset_gpio))
-               gpiod_set_value_cansleep(ov8858->reset_gpio, 1);
+               gpiod_set_value_cansleep(ov8858->reset_gpio, 0);
+-       usleep_range(1000, 2000);if (!IS_ERR(ov8858->pwdn_gpio))
-               gpiod_set_value_cansleep(ov8858->pwdn_gpio, 1);
+               gpiod_set_value_cansleep(ov8858->pwdn_gpio, 0);

修改摄像头配置文件

/FR/hardware/rockchip/camera/etc/camera/camera3_profiles_rk3399.xml

从其他的使用8858的项目里把8858的配置都抄过来

<Profiles cameraId="0" name="ov8858" moduleId="m00"> 只有1个摄像头moduleId为0

<sensor.orientation value="90"/> 摄像头旋转的角度

<sensorType value="SENSOR_TYPE_RAW"/> 摄像头的类型，另一个为SENSOR_TYPE_SOC，如果设置为SOC，这里面的配置都不在生效，摄像的画面会很幽暗。

关于摄像头的效果

/FR/hardware/rockchip/camera/etc/camera/rkisp1/ov8858_CameraKing_Largan-9569A2.xml

源文件：FR/device/rockchip/rk3399/media_profiles_default.xml（拷其他项目的）

这个文件会拷贝为机器的 /vendor/etcmedia_profiles_V1_0.xml 控制摄像头拍照和录像的分辨率，如果这个文件不对会导致录像功能崩溃

问题1：mclk时钟如果没有输出，很有可能是电源阈没有配置正确。

由上图可见mclk的引脚是GPIO2-B3.由原理图可知GPIO2用的电源域对应APIO2,

APIO2_VDD ---> VCC1V8_DVP

查看kernel文档Documentation/devicetree/bindings/power/rockchip-io-domain.txt

Possible supplies for rk3399:
- bt656-supply: The supply connected to APIO2_VDD.

RK3399 GPIO配置问题/电源域配置

问题2：上层未识别到摄像头,使用 APK 打不开摄像头
使用命令: dumpsy media.camera
Number of camera devices: 0,说明 framework 层没有识别到摄像头;

问题3：拍照功能正常，点击录像就会崩溃

logcat报错信息：

10-10 14:27:43.464 1511 2025 E CAM_Storage: getOtherAvailableSpace DIRECTORY:/DCIM/Camera UNAVAILABLE

10-10 14:27:43.468 1511 1511 I CAM_VideoModule: initializeRecorder: Thread[main,5,main]

10-10 14:27:43.469 1511 1511 D CAM_VideoModule: camera isReleased:false

10-10 14:27:43.482 417 1718 W StagefrightRecorder: Max file duration is not positive: 0 us. Disabling duration limit.

10-10 14:27:43.482 417 1718 W StagefrightRecorder: Target duration (0 us) too short to be respected

10-10 14:27:43.483 1511 1511 D CAM_LcyLocProvider: No location received yet.

10-10 14:27:43.484 1511 1511 D CAM_LcyLocProvider: No location received yet.

10-10 14:27:43.484 1511 1511 V CAM_VideoModule: New video filename: /storage/emulated/0/DCIM/Camera/VID_20221010_142743.mp4.tmp

10-10 14:27:43.490 417 592 E CameraSource: Video dimension (1920x1080) is unsupported

10-10 14:27:43.490 1511 1511 E MediaRecorder: start failed: -19

10-10 14:27:43.491 1511 1511 E CAM_VideoModule: Could not start media recorder.

修改device/rockchip/rk3399/media_profiles_default.xml文件，

修改前前置摄像头视频为 HD1080P HD720P CIF

修改后前置摄像头视频为 HD720 SD480P QVGA

问题4：关于数据链路的确定

如何使用 v4l2 获取底层数据流?
4.8.1 首先配置链路 First configure the link
目前 RK 的 Camera 驱动使用的 media-ctl 框架,有以下四种常见链路:
1、 MIPI-RAW-Sensor -> MIPI 接口->ISP
2、 MIPI-YUV-Sensor -> MIPI 接口->ISP
3、 Parallel-Sensor ->ISP
4、 Parallel-Sensor ->CIF

其中MIPI-RAW-Sensor -> MIPI interface->ISP对应的链路图为

配置链路命令如下:（设备树都配置过了，一般不用手动配置）

media-ctl -l '"ov5648 2-0036":0->"rockchip-mipi-dphy-rx":0[1]' //设备树只有 mipi-dphy-rx0

media-ctl -l '"rockchip-mipi-dphy-rx":1->"rkisp1-isp-subdev":0[1]' //设备树有 rkisp1_0 和 rkisp1_1 ，都试试看看那个可用

配置好后,使用 media-ctl -p 命令查看如下:会显示 ENABLED(下同),说明链路配置连接成功。

打开log开关后，可见如下的绑定关系

10-09 10:38:45.761 290 455 I RkCamera: <HAL> MediaController: @configureLink: disable "m00_f_ov8858 1-0036" [0] --> "rockchip-mipi-dphy-rx" [0]

10-09 10:38:45.761 290 455 I RkCamera: <HAL> MediaController: @setupLink

10-09 10:38:45.761 290 455 I RkCamera: <HAL> MediaController: @enumLinks

10-09 10:38:45.762 290 455 I RkCamera: <HAL> MediaEntity: @updateLinks

10-09 10:38:45.762 290 455 I RkCamera: <HAL> MediaEntity: link 0: pad 0 --> sink entity 7:0 (disabled)

10-09 10:38:45.762 290 455 D RkCamera: <HAL> MediaCtlHelper: @resetLinks

10-09 10:38:45.762 290 455 I RkCamera: <HAL> MediaController: @configureLink: disable "rockchip-mipi-dphy-rx" [1] --> "rkisp1-isp-subdev" [0]

tab23_rk99_fr:/ # media-ctl -p

........

........

- entity 7: rockchip-mipi-dphy-rx (2 pads, 2 links)

type V4L2 subdev subtype Unknown

device node name /dev/v4l-subdev1

pad0: Sink

[fmt:SBGGR10/3264x2448]

<- "m00_f_ov8858 1-0036":0 [ENABLED]

pad1: Source

[fmt:SBGGR10/3264x2448]

-> "rkisp1-isp-subdev":0 [ENABLED]

- entity 8: m00_f_ov8858 1-0036 (1 pad, 1 link)

type V4L2 subdev subtype Sensor

device node name /dev/v4l-subdev2

pad0: Source

[fmt:SBGGR10/3264x2448]

-> "rockchip-mipi-dphy-rx":0 [ENABLED]