split/rolling image

[liamtien]

My capture picture is split/rolling image issue, as attached, any solution is appreciation.

[igorpadykov]

Hi liam

split/rolling image may be due to timings or with interlaced data from sensor.

What processor used in the case, one can look at documentation on below link

and try to debug in sensor driver

i.MX Software|NXP 

Best regards
igor
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[liamtien]

The proccessor is i.MX6Q, FPGA send greyscale 16bits data via parallel DVP interface.   

[igorpadykov]

There are some posts covering some topics about raw capture:
https://community.nxp.com/thread/302769
https://community.nxp.com/thread/320618
https://community.nxp.com/thread/355469
https://community.nxp.com/thread/319780

[liamtien]

Does IMX6Q has the register can tune VSYNC timing? 

In camera_callback( ) of mxc_v4l2_capture.c:

    when (done_frame->buffer.flags & V4L2_BUF_FLAG_QUEUED) is true, I get current time by do_gettimeofday() , the interval between two frames sometimes is T usec, sometimes randomly  changes to 2T usec.

I wonder if it is the input VSYNC signal issue? How to solve it? Thanks.