IMX8QM CSI-2 can't get full 4 cameras frame data

[wtt]

Hello,

My IMX8QM board connects 4 1280*720 cameras by TI UB960 with 30Hz frame rate .

Now the four images can display on the screen, but there is always one camera data which is not completely, and the incorrect one is random in the 4 cameras. 

The attached image shows this situation. The bottom left image only real-time display 1/4 of the full picture, the remain part can't update.

Maybe the CSI-2 bandwidth isn't enough for the 4 lanes data, but how to adjust the CSI-2 bandwidth to solve this problem?

Please give me some advise. Thanks in advance!

Taotao Wang

[igorpadykov]

Hi Taotao

what bsp used in the case, may be recommended to try latest as they have many improvements

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...

Also recommended to use latest RPA tool for ddr configuration

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX8QM-DDR-Register-Programming-Aid-RPA...

For cameras may be useful below patches

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Nvp6324-driver-for-imx8qm/ta-p/1114616

Best regards
igor

[wtt]

Hi Igor

Thanks for your quickly respose.

Our BSP version is 4.14.78. Based on this version , I have made the max9286 and nvp6324 worked correclty. But for the UB960, there is this problem like the upper mentioned. 

Later I will try with the latest version.

B/R

Taotao Wang