设备：全志A40I 要驱动的设备是OV5640的摄像头
说明：
开发平台是居于AndroidM
开机启动打印出的信息如下。VFE成功安装进内核里面打印信息如下：
**************************************************************************************
[ 3.535279] [VFE]cci_init end
[ 3.538520] [VFE]Welcome to Video Front End driver
[ 3.544193] [VFE]csi0 probe end!
[ 3.547810] [VFE]csi1 probe end!
[ 3.551833] [VFE]csi_init end
[ 3.555572] [VFE]sunxi_isp_platform_register end
[ 3.561167] [VFE]mipi_init end
[ 3.564510] [VFE]flash_init end
[ 3.570307] [VFE]pdev->id = 0
[ 3.573550] [VFE]dev->cci_sel = 0
[ 3.577165] [VFE]dev->csi_sel = 0
[ 3.580975] [VFE]dev->mipi_sel = 0
[ 3.584686] [VFE]dev->isp_sel = 0
[ 3.588337] [VFE_WARN]fetch csi0_dev0_iovdd from device_tree failed
[ 3.595435] [VFE_WARN]fetch csi0_dev0_avdd from device_tree failed
[ 3.602313] [VFE_WARN]fetch csi0_dev0_dvdd from device_tree failed
[ 3.609068] [VFE_WARN]fetch csi0_dev0_afvdd from device_tree failed
[ 3.616155] [VFE_WARN]fetch csi0_dev0_power_en from device_tree failed
[ 3.623459] [VFE_WARN]fetch csi0_dev0_flash_en from device_tree failed
[ 3.630727] [VFE_WARN]fetch csi0_dev0_flash_mode from device_tree failed
[ 3.638049] [VFE_WARN]fetch csi0_dev0_flvdd from device_tree failed
[ 3.645142] [VFE_WARN]fetch csi0_dev0_flvdd_vol from device_tree failed
[ 3.650074] usb 4-1: new full-speed USB device number 2 using sunxi-ohci
[ 3.659935] [VFE_WARN]fetch csi0_dev0_af_pwdn from device_tree failed
[ 3.667699] [VFE]vfe_init end
[ 3.671033] [VFE]probe_work_handle start!
[ 3.675818] [VFE]vfe_runtime_resume
[ 3.680247] usbcore: registered new interface driver uvcvideo
[ 3.686759] USB Video Class driver (v1.0.25_SONiX_v3.10.56)
[ 3.693081] [VFE]..........................vfe clk open!.......................
[ 3.701233] [VFE]v4l2 subdev register input_num = 0
[ 3.701246] sunxi cedar version 0.1
[ 3.701384] VE: install start!!!
[ 3.701384]
[ 3.701464] cedar_ve: cedar-ve the get irq is 85
[ 3.702331] VE: install end!!!
[ 3.745934] [VFE]vfe sensor detect start! input_num = 0
[ 3.751757] [VFE]Find sensor name is "ov5640", i2c address is 78, type is "YUV" !
[ 3.760081] [VFE]Sub device register "ov5640" i2c_addr = 0x78 start!
[ 3.760088] device-mapper: uevent: version 1.0.3
[ 3.772978] device-mapper: ioctl: 4.24.0-ioctl (2013-01-15) initialised: dm-devel@redhat.com
[ 3.773298] [VFE]registered sensor subdev is OK!
[ 3.773302] [VFE]Check sensor!
[ 3.786620] [VFE]mclk on
[ 4.258508] [VFE]mclk off
[ 4.294711] [VFE]Sub device register "ov5640" is OK!
[ 4.295231] [VFE]V4L2 device registered as video2
[ 4.295274] [VFE]vfe_runtime_suspend
[ 4.295277] [VFE]..........................vfe clk close!.......................
[ 4.301581] [VFE]probe_work_handle end!
******************************************************************************************
在开机的过程中抓到MCLK和SDA和SCL都是有信号，有对应的波形。并且抓到I2C通信成功。
开机完之后检测摄像头的各个引脚的时候。三个电源都正常在，并且复位引脚引脚为高
睡眠引脚为低。 MCLK有电压出现，但是没有对应的波形。
进入ADB模式之后 ls /dev/video*
**************************************
/dev/video2
/dev/video5
/dev/video6
/dev/video7
*************************************
出现了对应的设备。
在I2C-3的目录下都发现了我对应设备的名字：
****************
cd /sys/class/i2c-adapter/i2c-3/3-003c
cat name
#a40i: ov5640
****************
但是在安卓系统部分启动的时候发现打印出一个这个提示：
**************************************************
[ 63.709808] vidioc_g_fmt_vid_cap: signal is not locked.
[ 63.927192] vidioc_g_fmt_vid_cap: signal is not locked.
[ 64.140787] vidioc_g_fmt_vid_cap: signal is not locked.
[ 64.354394] vidioc_g_fmt_vid_cap: signal is not locked.
[ 64.567889] vidioc_g_fmt_vid_cap: signal is not locked.
[ 64.785277] vidioc_g_fmt_vid_cap: signal is not locked.
**************************************************
正常进入到安卓系统里面的时候，点击相机出现以下两种情况
一、拍照情况下全部都是黑屏，但是点击拍照按钮还是会有提示音。
但是整个拍照都图案都是黑色，连拍出来得到图片都是黑色的
二、在录视频的情况下，就会直接提示出相机发生错误 无法连接到相机
且每一次都打印出下面的提示。说索取信号失败。
三、在打开相机的是会发现MCLK这个引脚没有时钟，但是电压保持正常。
*********************************************************
tvd_close:__tvd_3d_comp_mem_free
hpd :tvd_num[] = 4,g_status[] =401,
tvd_onsingal=vidioc_g_fmt_vid_cap: signal is not locked.
vidioc_s_fmt_vid_cap:dev_sel=0
hpd :tvd_num[] = 4,
g_status[] =400,
tvd_onsingal=0
****************************************************************
上面四打印提示，经过百度多次都无果。 在这里请大家帮个忙。再次谢谢了
。
一、怀疑方向有内核层没有给对正确的VFE设备给安卓层调用，所以安卓系统开机的时候没有获取到时钟，由于
对安卓系统不熟悉没办法验证。
二、 由于开机过程中有MCLK出现并且也成功注册设备成功，怀疑是安卓层和内核层之间的数据交流出现误差，但是具体的沟通文
件没办法丁文
三、由于看到最后打印出以下对话可能是MCLK睡眠过去了，但是没有找到对应的方法或者是没有用对方法将其唤醒。
*********************
[ 4.060054] [VFE]mclk off
[ 4.096233] [VFE]Sub device register "ov5640" is OK!
[ 4.096719] [VFE]V4L2 device registered as video2
[ 4.096764] [VFE]vfe_runtime_suspend
*********************
在整个系统里面，动过的文件有sys_config.fex camera.cfg menuconfig配置 sunxi-vfe/devices。ov5640.c
VFE该加的驱动文件都加上去了。但是安卓系统的照相机就是没有办法工作起来，并且没有mclk。
有调过的大神希望不舍赐教，小弟在这里不胜感激， 刚毕业出来才疏学浅，有什么问题描述不完整的希望赐教
QQ：2505300733
下面附上我的camera.cfg的配置:
;-------------------------------------------------------------------------------
; 用于camera的配置
;
; 采用格式:
; key = key_value
; 注意: 每个key需要顶格写;
; key_value紧跟着key后面的等号后面, 位于同一行中;
; key_value限制大小为256字节以内;
;
;-------------------------------------------------------------------------------
; exif information of "make" and "model"
;-------------------------------------------------------------------------------
key_camera_exif_make = MAKE_A33
key_camera_exif_model = MODEL_A33
;
; 1 for single camera, 2 for double camera
;-------------------------------------------------------------------------------
number_of_camera = 2
;-------------------------------------------------------------------------------
; CAMERA_FACING_BACK
; hi253
;-------------------------------------------------------------------------------
camera_id = 1
;-------------------------------------------------------------------------------
; 1 for CAMERA_FACING_FRONT
; 0 for CAMERA_FACING_BACK
;-------------------------------------------------------------------------------
camera_facing = 0
;-------------------------------------------------------------------------------
;
1 for camera without isp(using built-in isp of Axx)
; 0 for camera with isp
;-------------------------------------------------------------------------------
use_builtin_isp = 0
;-------------------------------------------------------------------------------
; camera orientation (0, 90, 180, 270)
;-------------------------------------------------------------------------------
camera_orientation = 0
;-------------------------------------------------------------------------------
; driver device name
;-------------------------------------------------------------------------------
camera_device = /dev/video2
;-------------------------------------------------------------------------------
; device id
; for two camera devices with one CSI
;-------------------------------------------------------------------------------
device_id = 0
used_preview_size = 1
key_support_preview_size = 720x576
key_default_preview_size = 720x576
used_picture_size = 1
key_support_picture_size = 720x576
key_default_picture_size = 720x576
used_flash_mode = 0
key_support_flash_mode = on,off,auto,red-eye,torch
key_default_flash_mode = off
used_color_effect=1
key_support_color_effect = none,mono,negative,sepia,aqua
key_default_color_effect = none
used_frame_rate = 1
key_support_frame_rate = 30
key_default_frame_rate = 30
used_focus_mode = 0
key_support_focus_mode = auto,infinity,macro,fixed
key_default_focus_mode = auto
;used_scene_mode = 0
;----------------------------------------------------
;key_support_scene_mode = auto,action,portrait,landscape,night,night-portrait,theatre,beach,snow,sunset,steadyphoto,fireworks,sports,party,candlelight,barcode,hdr
;----------------------------------------------------
key_default_scene_mode = auto
used_scene_mode = 0
key_support_scene_mode = auto,hdr
key_default_scene_mode = auto
used_white_balance = 1
key_support_white_balance = auto,incandescent,fluorescent,warm-fluorescent,daylight,cloudy-daylight
key_default_white_balance = auto
used_exposure_compensation = 1
key_max_exposure_compensation = 4
key_min_exposure_compensation = -4
key_step_exposure_compensation = 1
key_default_exposure_compensation = 0
used_zoom = 1
key_zoom_supported = true
key_smooth_zoom_supported = false
key_zoom_ratios = 100,120,150,200,230,250,300
key_max_zoom = 30
key_default_zoom = 0
key_horizonal_view_angle = 48
key_vertical_view_angle = 39.4
;-------------------------------------------------------------------------------
; CAMERA_FACING_FRONT
; sp0a19
;------------------------------------------------------------------------------camera_id = 1
;-------------------------------------------------------------------------------
; 1 for camera without isp(using built-in isp of Axx)
; 0 for camera with isp
;------------------------------------------------------------------------------use_builtin_isp = 0
;-------------------------------------------------------------------------------
; 1 for CAMERA_FACING_FRONT
; 0 for CAMERA_FACING_BACK
;-------------------------------------------------------------------------------
camera_facing = 1
;-------------------------------------------------------------------------------
; camera orientation (0, 90, 180, 270)
;-------------------------------------------------------------------------------
camera_orientation = 0
;-------------------------------------------------------------------------------
; driver device name
;-------------------------------------------------------------------------------
camera_device = /dev/video2
;-------------------------------------------------------------------------------
; device id
; for two camera devices with one CSI
;-------------------------------------------------------------------------------
device_id = 1
used_preview_size = 1
key_support_preview_size = 640x480,320x240,176x144
key_default_preview_size = 640x480
used_picture_size = 1
key_support_picture_size = 640x480,320x240
key_default_picture_size = 640x480
used_flash_mode = 0
key_support_flash_mode = on,off,auto
key_default_flash_mode = on
used_color_effect= 1
key_support_color_effect = none,mono,negative,sepia,aqua
key_default_color_effect = none
used_frame_rate = 1
key_support_frame_rate = 30
key_default_frame_rate = 30
used_focus_mode = 0
key_support_focus_mode = auto,infinity,macro,fixed
key_default_focus_mode = auto
used_scene_mode = 0
key_support_scene_mode = auto,portrait,landscape,night,night-portrait,theatre,beach,snow,sunset,steadyphoto,fireworks,sports,party,candlelight,barcode
key_default_scene_mode = auto
used_white_balance = 1
key_support_white_balance = auto,incandescent,fluorescent,warm-fluorescent,daylight,cloudy-daylight
key_default_white_balance = auto
used_exposure_compensation = 1
key_max_exposure_compensation = 4
key_min_exposure_compensation = -4
key_step_exposure_compensation = 1
key_default_exposure_compensation = 0
used_zoom = 1
key_zoom_supported = true
key_smooth_zoom_supported = false
key_zoom_ratios = 100,120,150,200,230,250,300
key_max_zoom = 30
key_default_zoom = 0
key_horizonal_view_angle = 44.6
key_vertical_view_angle = 39.4
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android版本6.0还是7.1?
Android M
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这个是Android M 也就是所谓的6吧。 排查到目前为止，发现可能是CSI和TVIN这两个设备冲突了。 但是不知道哪里切换摄像头的类型，在A40I的情况下带有两种摄像头的。 按照招引信息排查驱动代码发现的TVIN这方面。 也就是说安卓层可能调用的是TVIN摄像头（但是我没有配置TVIN摄像头）。 但是不知道数字摄像头怎么切换上去，知道的哥们说下 谢谢
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