Video0 cannot produce pictures, video3 can produce pictures normally

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin NX
1

Hi all, when debugging the camera, I found a problem:
/dev/video0, /dev/video1, when executing the following command, no picture will be output.
v4l2-ctl -d /dev/video0 --stream-mmap --stream-to-host 192.168.1.111
v4l2-ctl -d /dev/video1 --stream-mmap --stream-to-host 192.168.1.111
As for /dev/video3, after executing the following command, the picture can be produced normally.
v4l2-ctl -d /dev/video3 --stream-mmap --stream-to-host 192.168.1.111
Please help me find out why /dev/video0 cannot produce pictures, thank you!

Block Diagram:

image
image983×298 10.2 KB

soft version:

root@tegra:/sys/kernel/debug/dynamic_debug# cat /etc/nv_tegra_release
# R35 (release), REVISION: 4.1, GCID: 33958178, BOARD: t186ref, EABI: aarch64, DATE: Tue Aug  1 19:57:35 UTC 2023

dmesg:
dmesg.txt (107.8 KB)
dts:
dts.txt (428.8 KB)
trace log:
trace.txt (6.2 KB)

PS：
I checked the video of max9296 and confirmed that it is locked.
There are also camera triggers.

3

Boost the clocks to check the trace log if any different.

sudo su
echo 1 > /sys/kernel/debug/bpmp/debug/clk/vi/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/isp/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/nvcsi/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/emc/mrq_rate_locked
cat /sys/kernel/debug/bpmp/debug/clk/vi/max_rate |tee /sys/kernel/debug/bpmp/debug/clk/vi/rate
cat /sys/kernel/debug/bpmp/debug/clk/isp/max_rate | tee  /sys/kernel/debug/bpmp/debug/clk/isp/rate
cat /sys/kernel/debug/bpmp/debug/clk/nvcsi/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/nvcsi/rate
cat /sys/kernel/debug/bpmp/debug/clk/emc/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/emc/rate
4

The operation is performed according to the following command. The log is the log of the attachment.

sudo su
cd /sys/kernel/debug/dynamic_debug/
echo file csi2_fops.c +p > control

echo 1 > /sys/kernel/debug/bpmp/debug/clk/vi/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/isp/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/nvcsi/mrq_rate_locked
echo 1 > /sys/kernel/debug/bpmp/debug/clk/emc/mrq_rate_locked
cat /sys/kernel/debug/bpmp/debug/clk/vi/max_rate |tee /sys/kernel/debug/bpmp/debug/clk/vi/rate
cat /sys/kernel/debug/bpmp/debug/clk/isp/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/isp/rate
cat /sys/kernel/debug/bpmp/debug/clk/nvcsi/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/nvcsi/rate
cat /sys/kernel/debug/bpmp/debug/clk/emc/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/emc/rate

echo 1 > /sys/kernel/debug/tracing/tracing_on
echo 30720 > /sys/kernel/debug/tracing/buffer_size_kb
echo 1 > /sys/kernel/debug/tracing/events/tegra_rtcpu/enable
echo 1 > /sys/kernel/debug/tracing/events/freertos/enable
echo 2 > /sys/kernel/debug/camrtc/log-level
echo 1 > /sys/kernel/debug/tracing/events/camera_common/enable
echo > /sys/kernel/debug/tracing/trace
cat /sys/kernel/debug/tracing/trace
5

Didn’t see the log here.

6

Hi:
The steps are as follows：

root@tegra:/home/robot# sudo su
root@tegra:/home/robot# cd /sys/kernel/debug/dynamic_debug/
root@tegra:/sys/kernel/debug/dynamic_debug# echo file csi2_fops.c +p > control
root@tegra:/sys/kernel/debug/dynamic_debug#
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/bpmp/debug/clk/vi/mrq_rate_locked
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/bpmp/debug/clk/isp/mrq_rate_locked
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/bpmp/debug/clk/nvcsi/mrq_rate_locked
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/bpmp/debug/clk/emc/mrq_rate_locked
root@tegra:/sys/kernel/debug/dynamic_debug# cat /sys/kernel/debug/bpmp/debug/clk/vi/max_rate |tee /sys/kernel/debug/bpmp/debug/clk/vi/rate
832000000
root@tegra:/sys/kernel/debug/dynamic_debug# cat /sys/kernel/debug/bpmp/debug/clk/isp/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/isp/rate
1011200000
root@tegra:/sys/kernel/debug/dynamic_debug# cat /sys/kernel/debug/bpmp/debug/clk/nvcsi/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/nvcsi/rate
642900000
root@tegra:/sys/kernel/debug/dynamic_debug# cat /sys/kernel/debug/bpmp/debug/clk/emc/max_rate | tee /sys/kernel/debug/bpmp/debug/clk/emc/rate
3199000000
root@tegra:/sys/kernel/debug/dynamic_debug#
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/tracing/tracing_on
root@tegra:/sys/kernel/debug/dynamic_debug# echo 30720 > /sys/kernel/debug/tracing/buffer_size_kb
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/tracing/events/tegra_rtcpu/enable
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/tracing/events/freertos/enable
root@tegra:/sys/kernel/debug/dynamic_debug# echo 2 > /sys/kernel/debug/camrtc/log-level
root@tegra:/sys/kernel/debug/dynamic_debug# echo 1 > /sys/kernel/debug/tracing/events/camera_common/enable
root@tegra:/sys/kernel/debug/dynamic_debug# echo > /sys/kernel/debug/tracing/trace
root@tegra:/sys/kernel/debug/dynamic_debug# cat /sys/kernel/debug/tracing/trace
# tracer: nop
#
# entries-in-buffer/entries-written: 0/0   #P:8
#
#                                _-----=> irqs-off
#                               / _----=> need-resched
#                              | / _---=> hardirq/softirq
#                              || / _--=> preempt-depth
#                              ||| /     delay
#           TASK-PID     CPU#  ||||   TIMESTAMP  FUNCTION
#              | |         |   ||||      |         |
root@tegra:/sys/kernel/debug/dynamic_debug# v4l2-ctl -d /dev/video0 --stream-mmap --stream-to-host 192.168.1.111
                VIDIOC_CROPCAP returned -1 (Inappropriate ioctl for device)
                VIDIOC_G_STD returned -1 (Inappropriate ioctl for device)
                VIDIOC_G_DV_TIMINGS returned -1 (Inappropriate ioctl for device)
^C
root@tegra:/sys/kernel/debug/dynamic_debug# cat /sys/kernel/debug/tracing/trace > /home/robot/trace_1.txt
root@tegra:/sys/kernel/debug/dynamic_debug# dmesg > /home/robot/dmesg_1.txt

dmesg_1.txt (107.8 KB)
dts.txt (428.8 KB)
trace_1.txt (6.7 KB)

7

The trace tell didn’t receive any data from sensor.
Maybe need to probe the signal to confirm it.

Thanks

9

How to judge the above conclusion? Please help provide relevant guidance.

10

If NVCSI receive any data from the MIPI bus should print the frame start frame end like FS/FE … message.

12

OK,thank you!

13

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