EMEM decode error when using v4l2src io-mode=3

Autonomous Machines Jetson & Embedded Systems Jetson TK1
1

I am using a MIPI-CSI2 device on a custom TK1 board with the gstreamer pipeline:

gst-launch-1.0 v4l2src io-mode=3 ! ‘video/x-raw,format=UYVY’ ! queue ! xvimagesink

I am getting image tearing along with EMEM decode errors like the following:

[ 798.378667] mc-err: [mcerr] (vi) csw_viw: EMEM decode error on PDE or PTE entry
[ 798.385978] mc-err: [mcerr] status = 0x60051072; addr = 0x81fbb040
[ 798.392169] mc-err: [mcerr] secure: no, access-type: write, SMMU fault: nr-nw-s

This does not happen if I use io-mode=2 but the frame rate is lower. I really could use the improved performance of io-mode 3 if possible. Is it supposed to work?

2

Hi merwin,
We don’t support io-mode=3. Please refer to the following command:
gst-launch-1.0 videotestsrc ! ‘video/x-raw,width=1280,height=720,format=UYVY’ ! nvvidconv ! ‘video/x-raw(memory:NVMM),width=1280,height=720,format=I420’ ! nvhdmioverlaysink

Please replace videotestsrc with your v4l2src and give it a try.

3

I need to use xvimagesink (or nveglglessink) to put the video in an X window. Gstreamer can’t connect nvvidconv to either one.

4

Could you give it a try and check whether there is any difference or not?

5

I get ‘Internal data flow error’ with your pipeline and v4l2src.

My pipeline works fine with io-mode=2 but I was getting almost twice the performance when using io-mode=3.

6

Hi merwin, since we don’t have your sensor, is it possible to reproduce the issue with usb camera? I tried but the v4l2src only forces the camera to output mjpeg and cannot change the format. Any other way we can reproduce it on TK1?

7

The EMEM decode error should happen with any MIPI-CSI2 device when using io-mode=3. Ours is a custom board but I believe there is a CSI2 sensor available for the Jetson board that you could try.

I would also like to know what the maximum frame rate I can expect for 1080p is on the CSI2 interface using gstreamer with output to an X window.

8

On TK1, we now do not have plan for v4l2src io-mode=3.

9

Can you tell me what the maximum frame rate I can expect for 1080p is on the CSI2 interface using gstreamer with output to an X window?

Also, does the TX1 support io-mode=3?

10

Continue in https://devtalk.nvidia.com/default/topic/1015392