NVIDIA TX2 mode of operation: [Command vs Video]

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi experts,

I am trying to configure CSI2 interface of TX2 (with J120 carrier board) as receiver for SENSOR data.
Sensor is capable of working in ONLY command mode.
(i.e. it is an unidirectional interface which can send short or Long packets )

NVSI section of parker TRM mentions “NVCSI works on streaming mode”
AFAIK, CSI2 operates in either COMMAND MODE or VIDEO MODE. Please can some NVIDIA experts clarify me on what is streaming mode? Is that same as COMMAND mode ?

Thanks

2

streaming mode is the same as video mode.

3

@ShaneCCC,

Thanks for the quick reply. It helps a lot.

So, I can’t interface a Sensor (or any CSI2 module) which supports only COMMAND mode to TX2 for capturing data.

Whether my understanding is correct?

Sorry for repeating, but that seems like a decider in my current project.

Thanks in advance.

4

Sorry, current driver implement can’t support this case. If your sensor can’t output data continuously.

5

ShaneCCC,

Sounds like NVCSI/ VI HW is capable of receiving data in “command mode” & it is just a software issue.
If so, is there any plan to add this feature to TX2 software in near future?

I am trying to double confirm this because, in TRM it is evident that DSI supports both video and command mode. However, CSI just mentions that it stream only mode.

I am not sure, if it is a mistake in TRM.

Kindly suggest

Thanks

6

@ravikiran
Sorry to tell. Don’t have plan for this cause currently.

7

ShaneCCC,

Sounds like NVCSI/ VI HW is capable of receiving data in “command mode” & it is just a software issue.

But TRM suggests othwer way. In TRM, it is evident that DSI supports both video and command mode. But it also mentions that CSI supports only “streaming mode”.

In that case are you talking about “software/driver” to bridge NVCSI with display engine to receive data in command mode? Otherwise I don’t see any feasibility in JUST software driver to enable -->NVCSI–>VI in "command mode’

A brief explanation from expert like you is much appreciated.

Thanks

8

Dear ShaneCCC,

Looking forward to hear back from you.

Thanks

9

I think you already get the information from TRM? TX2 only support streaming mode from the HW.

10

Thanks ShaneCCC for the clarification. Appreciate your help.