[Linuxptp-users] issue with P2P mode

[Hardik Gohil]

Hello,

I am working on Linux 3.12 running on TI AM335x.

The Test system is GPS connected to CPU over Ethernet and GPS is configured
to PEER to PEER mode.

I can successfully test using E2E mode there were no issues.

***@phycore-am335x-1:~# ptp4l -i eth0 -m -P -s

ptp4l[2103.623]: selected /dev/ptp0 as PTP clock
ptp4l[2103.653]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[2103.657]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[2103.724]: port 1: new foreign master 001d7f.fffe.8002f7-1
ptp4l[2103.849]: port 1: received PDELAY_REQ without timestamp
ptp4l[2104.658]: timed out while polling for tx timestamp
ptp4l[2104.659]: increasing tx_timestamp_timeout may correct this issue,
but it is likely caused by a driver bug
ptp4l[2104.659]: port 1: send peer delay request failed
ptp4l[2104.659]: port 1: LISTENING to FAULTY on FAULT_DETECTED
(FT_UNSPECIFIED)
ptp4l[2120.707]: port 1: FAULTY to LISTENING on FAULT_CLEARED
ptp4l[2120.865]: port 1: received PDELAY_REQ without timestamp
ptp4l[2121.714]: timed out while polling for tx timestamp
ptp4l[2121.715]: increasing tx_timestamp_timeout may correct this issue,
but it is likely caused by a driver bug
ptp4l[2121.715]: port 1: send peer delay request failed
ptp4l[2121.715]: port 1: LISTENING to FAULTY on FAULT_DETECTED
(FT_UNSPECIFIED)



Regards,
Hardik A Gohil

[Richard Cochran]

Post by Hardik Gohil
I am working on Linux 3.12 running on TI AM335x.

Is this a mainline kernel, or a vendor kernel?

Thanks,
Richard

[Hardik Gohil]

Hello ,

It is a vendor kernel from PHYTEC.



Regards,
Hardik A Gohil

Post by Richard Cochran

Post by Hardik Gohil
I am working on Linux 3.12 running on TI AM335x.

Is this a mainline kernel, or a vendor kernel?
Thanks,
Richard

[Richard Cochran]

Post by Hardik Gohil
It is a vendor kernel from PHYTEC.

Please try to reproduce the issue using a mainline kernel.

Thanks,
Richard

[Richard Cochran]

Post by Richard Cochran
Please try to reproduce the issue using a mainline kernel.

I can reproduce this on a BBB on mainline 3.14.33. I honestly can't
remember whether P2P ever worked on the CPTS, but I think it did,
IIRC.

I'll see if I can track this done...

Thanks,
Richard

[Richard Cochran]

Try adding -2 (layer2 transport) to the command line.

It looks like the CPTS does not recognize UDP P2P packets. You should
ask TI about this...

Thanks,
Richard