How about using one same device node such as udmabuf0 in two different processes

[Homio]

Hello, I use udmabuf for v4l2_memory as V4L2_MEMORY_USERPTR. It works fine when one process to read camera. But I have four camera, and use four same process to read them. when I input the same device node such as udmabuf0, the address to copy the image is overlaped. And I can not get the right image for them. Is there probability to create one device node and use it in different process.

[rejuce]

i had also multiple cameras, i solved it by defining multiple udma buffers, one for each camera

[Homio]

Yes, I also do that temporarily.😂