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
Attach the used device tree.