Hi, On Mon, Feb 03, 2020 at 10:52:52AM +0530, Shah, Nehal-bakulchandra wrote: > Currently i am working on enabling UCSI support > for CCGx based controller on AMD GPU Cards. > > Now i am observing the issue reported here when > i unplug the cable. > > https://bugzilla.redhat.com/show_bug.cgi?id=1762031 > > Also would like to know is there any way we can > get user level notifications for UCSI? If you want to see the actual UCSI notification in user space, then that is not possible, but the driver does produce trace output, and I would actually like to see what we got there. You need debugfs to be mounted. Then try the following: # Unload all UCSI modules modprobe -r ucsi_acpi # At this point you should plug-in the problematic device # Reload the UCSI core module modprobe typec_ucsi # Enable UCSI tracing echo 1 > /sys/kernel/debug/tracing/events/ucsi/enable # Now reload the ACPI glue driver modprobe ucsi_acpi # Unplug the problematic device so that you see the error # Finally dump the trace output cat /sys/kernel/debug/tracing/trace So if that works, please send the trace output to me. Thanks, -- heikki
