Hi JerryChang,
Thanks for reply, I have seen link which you have shared. I am trying to enable tracing, but when I
do cat /sys/kernel/debug/tracing/trace, It does not show any tracing messages. I follow below steps to
enable tracing:
First
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 > /sys/kernel/debug/tracing/trace
After that v4l2-ctl to grab raw frame, then cat /sys/kernel/debug/tracing/trace. but it shows only below msgs:
root@tegra-ubuntu:~# cat /sys/kernel/debug/tracing/trace
tracer: nop
entries-in-buffer/entries-written: 23/23 #P:4
_-----=> irqs-off
/ _----=> need-resched
| / _—=> hardirq/softirq
|| / _–=> preempt-depth
||| / delay
TASK-PID CPU# |||| TIMESTAMP FUNCTION
| | | ||||
After that no message coming. Does it mean mipi signals are not coming to my port?