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mipi-csi access issue

Question asked by Tetsuya Sugiyama on Apr 26, 2020
Latest reply on Apr 28, 2020 by igorpadykov

Hello,
I understand the lack of performance of iMX8Mmini's cortex-M4 and dare to access MIPI-CSI and CSI Bridge with cortex-M4.
I actually made a program to access MIPI-CSI and CSI Bridge registers with cortex-M4, and confirmed that the camera data was acquired.
However, the process succeeds when I run only the cortex-M4 program from u-boot, but when IMX-Linux is run in parallel, when the cortex-M4 program accesses the MIPI-CSI register. It freezes.

 

I intend to edit the device tree of IMX-Linux and delete the nodes related to MIPI-CSI and CSI Bridge. Is it still insufficient?

 


Or is there a mechanism that the register access from the cortex-M4 cannot be done when the cortex-A53 operates as the SoC specifications?

 

IMX-Linux: Rev. L4.14.98_2.3.0, 22 January 2020
Board: 8MMINILPD4-EVK

 

Attach the used device tree.

 

Thanks.
Tetsuya.

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