Hi

Sorry for the delayed response. I was on vacation.
On 2/3/2020 7:02 PM, Heikki Krogerus wrote:
> On Mon, Feb 03, 2020 at 03:28:11PM +0200, Heikki Krogerus wrote:
>> 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://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.redhat.com%2Fshow_bug.cgi%3Fid%3D1762031&data=02%7C01%7CNehal-bakulchandra.Shah%40amd.com%7Ceb1ac5e877db4fa9d75f08d7a8ad87a3%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637163335569266081&sdata=KemJKkVhpqDo%2FSbHhVaMz7jrcploEALJYg%2BRWvhJ7bM%3D&reserved=0
>>>
>>> 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.
> 
> Actually, first things first. Please share your dmesg output. Are you
> using ucsi_acpi or ucsi_ccg glue driver?
> 
> thanks,
> 

I am using CCG based UCSI driver without any
modification.For I2C part i have written custom
driver.

I have attached the trace out and dmesg crash log.

Please have a look


Thanks
Nehal Shah