MIPI - CSI controller configuration issue

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MIPI - CSI controller configuration issue

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ximenbingmeng
Contributor IV

We are debugging the OV camera based on the IMX8MQ chip, the mipi signal is 3840x2160@30fps rate is 1184, the problem encountered is that the camera has been sending image signals, but the main control has not received the data, it is suspected that it is a mipi timing problem, please consult the following problems
1.How can I tell if the mipi clock is frameraining or gate? Where can I see it in the manual or kernel?

ximenbingmeng_0-1726646460379.png

 


2. Whether the IMX8MQ chip has registers can be seen in which mode the mipi receiver is still in??? If the mipi receiver is still in LP mode, is it generally that the mipi does not detect the timing sent by the sensor from the LP to the HS, and how to adjust it?
3. Does it support double line (the image output from X8B is two lines of image output alternately)? Below is a waveform plot of the two lines of output on the camera side

ximenbingmeng_2-1726646524468.jpeg

 

ximenbingmeng_1-1726646511385.jpeg

 


4. How to see the timing of mipi from the IMX8MQ register configuration, such as T (HS-PREPARE), T (HS-ZERO), T (HS-TRAIL)
Please reply as soon as possible, thank you very much!

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Bio_TICFSL
NXP TechSupport
NXP TechSupport

Hello,

I guess something is bad in the clock configuration of the MIPI to change that you need to take the dtb in your linux BSP and change it to your desire clock.

Regards

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