I use 1 max9296+ 2 max9295 , 1920x1536 ,30fps , whit gmsl2, my configuration is normal on Xavier with jp4.6, but the following error is reported on ORIN whit jp5.1.1, dmesg :
On the forums I noticed that some people also encountered this problem, mostly saying that pix_clk_hz and serdes_pix_clk_hz did not match. I tried several things but failed.
Please help me to diagnose the cause of this problem, thanks!
please do not replace that debug firmware since it’s not compatible with JP-5.1.1/l4t-r35.3.1
may I know what’s your output data rate.
skew calibration is required if sensor or deserializer is using DPHY, and the output data rate is > 1.5Gbps.
you may see-also SerDes Pixel Clock for details. thanks
Thanks for your reply!
okay,I have changed back to the official version of r35.3.1
Now the question is: what could possibly be the reason why I can get the stream when I open it properly the first time, but I can’t get the stream when I open it again after closing it?
How can I fix it?
I use jetson orin with 8core + 32GB memory :
1). When starting up, I used the command “v4l2-ctl --device /dev/video0 --stream-mmap --set-fmt-video=width=1920,height=1536,pixelformat=UYVY” to catch the data, then I stopped and ran the command again, but at this point I couldn’t catch any data.
2). The “Demsg.log” and “Trace.log” of the whole process are shown in the attachment.
In the dmesg, I noticed that there was a “CPU:0, Error: cbb-fabric@0x13a00000, irq=34” error, I don’t know if this error affects.
how you terminate v4l pipeline, are you using ctrl^c to shut it down?
could you please have another test by adding --stream-count=30 for the pipeline to capture 30-frames and then close the camera stream gracefully.
it is slave error, which may due to no power-up as an invalid access.
since you’re able to enable the stream for testing. you may ignore these cbb-fabric errors at the moment.
according to below… it’s your 2nd to access the stream.
[ 1092.216169] video0: VIDIOC_G_FMT: type=vid-cap, width=1920, height=1536, pixelformat=UYVY, field=none, bytesperline=3840, sizeimage=5898240, colorspace=8, flags=0x0, ycbcr_enc=0, quantization=0, xfer_func=0
[ 1094.804151] tegra-camrtc-capture-vi tegra-capture-vi: uncorr_err: request timed out after 2500 ms
[ 1094.813299] tegra-camrtc-capture-vi tegra-capture-vi: err_rec: attempting to reset the capture channel
[ 1094.823384] (NULL device *): vi_capture_control_message: NULL VI channel received
as you can see, it’s capture engine to wait till 2500ms timeout. the logs from VI tracing shown there’s no frame signals, i.e. SOF/EOF…etc;
please double check your power sequence. this may to due to you’ve incorrect stream-on/off sequence.
yes,I use ctrl^c to shut it down. I will add “–stream-count=30” to try again.
How can "cbb-fabric error" be fixed? I use 8cores + 32GB memory
I use command “v4l2-ctl --device /dev/video0 --stream-mmap --set-fmt-video=width=1920,height=1536,pixelformat=UYVY --stream-count=30” to try again as shown below pic:
it looks like camera did not output frames for your 2nd trail.
do you have implement reset mechanism for this SerDes chip, you may try sending a reset before s_stream.
The second time to take the data stream, the Des MAX9296 is output signal, measured by oscilloscope,but the VI message indicates that the stream cannot be fetched.
So, I think 9296 has been sending streams, but SOC can’t get streams for some reason?
I think, there may be some mismatch between the parameter settings of "pix_clk_hz"and “serdes_pix_clk_hz”,but I don’t know how to correctly configure it according to the serdes-pixel-clock
Are there any empirical values for reference?
I use : max9296+2max9295+2isx031, 1920x1536 @30fps
according to the VI tracing logs, there’s not shown frame signals, especially start-of-frame and end-of-frame. that’s why VI reporting timeout errors.
do you sending a reset before s_stream? this approach sometime able to fix stream stability issues.
do you know deserializer output data rate?
here’s formula… serdes_pix_clk_hz = (deserializer output data rate in hertz) * (number of CSI lanes) / (bits per pixel)
you may also check Sensor Pixel Clock for several approaches to evaluate sensor pixel clock rate.