rk3399 Android6.0上调试ov8858，按照wiki资料配置了cam_board.xml，但没有图像输出，问下可能原因有哪些？
修改的配置信息：
1、在dts中配置：
&isp0{
gpios-cifpower = <&gpio7 GPIO_B4 GPIO_ACTIVE_HIGH>;
status = “okay”;
};
2、 kernel/drivers/media/video/rk_camsys/camsys_drv.c 中
enum of_gpio_flags flags; int cifpower_io; int io_ret; cifpower_io = of_get_named_gpio_flags(dev->of_node, “gpios-cifpower”, 0, &flags); camsys_trace(1, “1-gpios-cifpower： gpio=%d”, cifpower_io); if(gpio_is_valid(cifpower_io)){ cifpower_io = of_get_named_gpio_flags(dev->of_node, “gpios-cifpower”, 0, &flags); camsys_trace(1, “gpios-cifpower： gpio_request”); io_ret = gpio_request(cifpower_io,“cifpower”); camsys_trace(1, “1-gpios-cifpower： gpio_request=%d”, io_ret); if(io_ret < 0){ camsys_err(“Request %s(%d) failed”,“cifpower”, cifpower_io); } else{ gpio_direction_output(cifpower_io, 1); gpio_set_value(cifpower_io, 1); camsys_trace(1, “gpios-cifpower： %d high”, cifpower_io); } }
3、配置cam_board.xml
<SensorAWB_Frame_Skip fps=“15”></SensorAWB_Frame_Skip>
<AWB_Auto support=“1”></AWB_Auto>
<AWB_Incandescent support=“1”></AWB_Incandescent>
<AWB_Fluorescent support=“1”></AWB_Fluorescent>
<AWB_Warm_Fluorescent support=“1”></AWB_Warm_Fluorescent>
<AWB_Daylight support=“1”></AWB_Daylight>
<AWB_Cloudy_Daylight support=“1”></AWB_Cloudy_Daylight>
<AWB_Twilight support=“1”></AWB_Twilight>
<AWB_Shade support=“1”></AWB_Shade>
<Sence_Mode_Auto support=“1”></Sence_Mode_Auto>
<Sence_Mode_Action support=“1”></Sence_Mode_Action>
<Sence_Mode_Portrait support=“1”></Sence_Mode_Portrait>
<Sence_Mode_Landscape support=“1”></Sence_Mode_Landscape>
<Sence_Mode_Night support=“1”></Sence_Mode_Night>
<Sence_Mode_Night_Portrait support=“1”></Sence_Mode_Night_Portrait>
<Sence_Mode_Theatre support=“1”></Sence_Mode_Theatre>
<Sence_Mode_Beach support=“1”></Sence_Mode_Beach>
<Sence_Mode_Snow support=“1”></Sence_Mode_Snow>
<Sence_Mode_Sunset support=“1”></Sence_Mode_Sunset>
<Sence_Mode_Steayphoto support=“1”></Sence_Mode_Steayphoto>
<Sence_Mode_Pireworks support=“1”></Sence_Mode_Pireworks>
<Sence_Mode_Sports support=“1”></Sence_Mode_Sports>
<Sence_Mode_Party support=“1”></Sence_Mode_Party>
<Sence_Mode_Candlelight support=“1”></Sence_Mode_Candlelight>
<Sence_Mode_Barcode support=“1”></Sence_Mode_Barcode>
<Sence_Mode_HDR support=“1”></Sence_Mode_HDR>
<Effect_None support=“1”></Effect_None>
<Effect_Mono support=“1”></Effect_Mono>
<Effect_Solarize support=“1”></Effect_Solarize>
<Effect_Negative support=“1”></Effect_Negative>
<Effect_Sepia support=“1”></Effect_Sepia>
<Effect_Posterize support=“1”></Effect_Posterize>
<Effect_Whiteboard support=“1”></Effect_Whiteboard>
<Effect_Blackboard support=“1”></Effect_Blackboard>
<Effect_Aqua support=“1”></Effect_Aqua>
<Focus_Mode_Auto support=“1”></Focus_Mode_Auto>
<Focus_Mode_Infinity support=“1”></Focus_Mode_Infinity>
<Focus_Mode_Marco support=“1”></Focus_Mode_Marco>
<Focus_Mode_Fixed support=“1”></Focus_Mode_Fixed>
<Focus_Mode_Edof support=“1”></Focus_Mode_Edof>
<Focus_Mode_Continuous_Video support=“0”></Focus_Mode_Continuous_Video>
<Focus_Mode_Continuous_Picture support=“1”></Focus_Mode_Continuous_Picture>
<Flash_Mode_Off support=“1”></Flash_Mode_Off>
<Flash_Mode_On support=“1”></Flash_Mode_On>
<Flash_Mode_Torch support=“1”></Flash_Mode_Torch>
<Flash_Mode_Auto support=“1”></Flash_Mode_Auto>
<Flash_Mode_Red_Eye support=“1”></Flash_Mode_Red_Eye>
<Anti_Banding_Auto support=“1”></Anti_Banding_Auto>
<Anti_Banding_50HZ support=“1”></Anti_Banding_50HZ>
<Anti_Banding_60HZ support=“1”></Anti_Banding_60HZ>
<Anti_Banding_Off support=“1”></Anti_Banding_Off>
<Continue_SnapShot support=“1”></Continue_SnapShot>
<DV_QCIF name=“qcif” width=“176” height=“144” fps=“10” support=“1”></DV_QCIF>
<DV_QVGA name=“qvga” width=“320” height=“240” fps=“10” support=“1”></DV_QVGA>
<DV_CIF name=“cif” width=“352” height=“288” fps=“10” support=“1”></DV_CIF>
<DV_VGA name=“480p” width=“640” height=“480” fps=“10” support=“0”></DV_VGA>
<DV_480P name=“480p” width=“720” height=“480” fps=“10” support=“0”></DV_480P>
<DV_720P name=“720p” width=“1280” height=“720” fps=“10” support=“1”></DV_720P>
<DV_1080P name=“1080p” width=“1920” height=“1080” fps=“10” support=“1”></DV_1080P>