Change default io_mode in driver

Hi guys
which IO_Mode in Jetson device capture driver has lowest latency?
I think “User_Ptr” is not so safe but has lowest latency?
I know that “read mode” is highest latency and “MMAP” mode is better than “read Mode” but not better than “User_Ptr” mode.
However which IO mode is suggested by you for lowest latency ?
How can we set IO mode other than default in driver ? For example How can we set “User_Ptr” mode in Jetson capture camera driver ? Can it be done?

thanks alot.

The default is MMAP mode and should be the best performance.
You can reference to v4l2-ctl for how to configure the IO mode.

Thanks for your reply.

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