In V4L2_BUF_TYPE_VIDEO_CAPTURE, it works fine at V4L2_MEMORY_MMAP, but, it didn't work at the V4L2_MEMORY_USERPTR.
Data isn't written in the acquired buffer by "ioctl(fd, VIDIOC_DQBUF, &buf)".
My customer want to use the V4L2_MEMORY_USERPTR.
Is it supporting V4L2_MEMORY_USERPTR in i.MX6DQ with L3.14.28?
The function looks no support from below link.