1. 前言

全志V5 SDK里面有ov2710的sensor驱动，但是实际硬件需要根据具体特性进行修改

2. 修改sensor驱动

（1）初始化添加如下:

（2） 修改lane数
Mipi驱动默认使用4条lane,由于这边mipi接口使用一条lane,需要修改lane数

Mipi驱动目录:

修改lane mapping：

3. I2C问题

/lib/modules/4.4.55 # insmod videobuf2-dma-contig.ko
/lib/modules/4.4.55 # insmod vin_io.ko
/lib/modules/4.4.55 # insmod ov2710_mipi.ko
/lib/modules/4.4.55 # insmod vin_v4l2.ko
[   24.602928] [VIN_WARN]Get mipi clk failed!
[   24.607525] [VIN_WARN]Get mipi clk source failed!
[   24.613000] [VIN_ERR]ov2710_mipi request i2c3 adapter failed!

这里需要使用的I2C3为注册

这里没有i2c-3

(1)看是否有被占用
没有
(2)查看dev下有无i2c设备----没有
Twi3没有注册成功
(3)看启动log--发现twi也没错

(4)查看设备树

（5）修改sysconfig配置文件

发现是这里未开启I2C3

（6）正常加载如下

/lib/modules/4.4.55 # insmod videobuf2-dma-contig.ko
/lib/modules/4.4.55 # insmod vin_io.ko
/lib/modules/4.4.55 # insmod ov2710_mipi.ko
[   21.846634] ----------init_sensor
/lib/modules/4.4.55 # insmod vin_v4l2.ko
[   25.116058] -------sensor_probe, start
[   25.120406] -------sensor_probe, end
[   25.183136] [ov2710_mipi]find ov2710 raw data camera sensor now.

4. 采集timeout问题

/tmp # ./csi_test_mplane_32bit 0 0
open /dev/video0 fd = 3
find sunxi_isp.0 is /dev/v4l-subdev7
open sunxi_isp.0 fd = 4
find sunxi_isp.1 is /dev/v4l-subdev9
open sunxi_isp.1 fd = 5
[  116.779001] [ov2710_mipi]find ov2710 raw data camera sensor now.
resolution got from sensor = 640*480 num_planes = 3
[  116.795351] [ov2710_mipi]sensor_s_stream on = 1, 640*480 3007
VIDIOC_STREAMON ok
VIDIOC_S_CTRL ok
VIDIOC_S_CTRL ok
[  116.892322] [ov2710_mipi]s_fmt set width = 640, height = 480
[  118.790309] [ov2710_mipi]sensor_s_stream on = 0, 640*480 3007
[  118.797258] [ov2710_mipi]sensor_s_stream on = 1, 640*480 3007
select timeout
VIDIOC_S_CTRL ok
VIDIOC_S_CTRL ok
[  118.892334] [ov2710_mipi]s_fmt set width = 640, height = 480
[  118.904676] [VIN]vin pipiline reset after interrupt timeout!
[  120.790309] [ov2710_mipi]sensor_s_stream on = 0, 640*480 3007
[  120.797260] [ov2710_mipi]sensor_s_stream on = 1, 640*480 3007
select timeout
VIDIOC_S_CTRL ok
VIDIOC_S_CTRL ok
[  120.892331] [ov2710_mipi]s_fmt set width = 640, height = 480
[  120.904334] [VIN]vin pipiline reset after interrupt timeout!
[  121.970883] [ov2710_mipi]sensor_s_stream on = 0, 640*480 3007

5. 查硬件

（1）硬件连接

按如下接上排线, 不要接反了

（2）查PMU供电电压

有一路IOVDD使能DVDD的那路DCDC烧了,量出来电压是5v；
可能两个模组都已经烧了,因为都发热很严重过

（3）修改PMU供电配置&同时更换新的sensor模组

出图正常