Got "frame start syncpt timeout!0"

Hi Nvidia,
I am bringing up AR0145 RAW Y8 format (120fps)on Nano develop Kit, I meet errors as below when execute command “v4l2-ctl --set-fmt-video=width=1280,height=800,pixelformat=GREY --stream-mmap -d /dev/video0 --stream-poll --stream-count=1 --stream-skip=20 --stream-to=cap1.raw”:

Could you help with this?

One note is I can capture frames well by v4l2-ctl with Y10 format settings. I just switched to Y8 settings in driver and modified sensor_common.c as below:


I did not change DTS file the Y10 settings were using. BTW I did check to the Y8 settings on other board and it works well.

Please help, thanks a lot.

hello bing.yan,

may I also know what’s the latest sensor dump reported, for instance, $ v4l2-ctl -d /dev/video0 --list-formats-ext
is it shown 8-bit Greyscale, or it’s still reported as Y10?

FYI, you may see-also topic, Topic 220736 for your reference.

Hi @JerryChang
Below is dump information of the command:

Showing 8bit Grey. I will also check your shared link. Thanks!

How to understand from below trace information:

Can any clew be got from that?

hello bing.yan,

you may check Tegra X1 SoC Technical Reference Manual, please refer to chapter-29.16 for MIPI CSI register descriptions.
for example,
you may also check CSI_CSI_CIL_A_STATUS_0 for the error code 0x13;
and, CSI_CSI_CILA_STATUS_0 for the error code 0x70061.

Hi @JerryChang,
I got Y8 frame captured successfully now. the CSI_CSI_CIL_A_STATUS_0 and CSI_CSI_CILA_STATUS_0 is useful. I replaced the MIPI timing of Y8 settings to Y10 settings’ and issue has gone and can capture Y8 frames now. Thanks for the help.