E810-XXVDA4T: GNSS/SMB access to GPS but ptp4l cannot detect it

[WuYiLong]

The network card I use is E810-XXVDA4T
Interface and driver information:
----------------------------------------------------------------------------------
oai@oai:~$ lspci | grep -i ethernet
8a:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-C for SFP (rev 02)
8a:00.1 Ethernet controller: Intel Corporation Ethernet Controller E810-C for SFP (rev 02)
8a:00.2 Ethernet controller: Intel Corporation Ethernet Controller E810-C for SFP (rev 02)
8a:00.3 Ethernet controller: Intel Corporation Ethernet Controller E810-C for SFP (rev 02)
----------------------------------------------------------------------------------
oai@oai:~$ sudo ethtool -i ens1f0np0
driver: ice
version: 6.8.0-52-generic
firmware-version: 4.70 0x8001f7b3 1.3755.0
expansion-rom-version:
bus-info: 0000:8a:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes
----------------------------------------------------------------------------------
The current situation is that I installed O-DU on the server and want to interface with the physical RU, but when performing PTP time synchronization (ptp4l, phc2sys), I found that there was a high delay problem (delay=500). Therefore, I connected a GPS antenna to the GNSS/SMB port, but my ptp4l only showed that the local clock was used (no GPS information was detected).
----------------------------------------------------------------------------------
oai@oai:~$ cat /etc/ptp4l.conf
[global]
domainNumber 24
slaveOnly 0
verbose 1
time_stamping hardware
tx_timestamp_timeout 500
logging_level 6
summary_interval 1
priority1 128
priority2 128

#[eno1]
[ens1f0np0]
#network_transport L2
#hybrid_e2e 0
----------------------------------------------------------------------------------
I have used timedatectl (but System clock synchronized: no) and cgps -s (the information shows n/a), but no GPS signal was found.
Therefore, I would like to ask how to see the GPS signal and reduce the delay of PTP.

[Azeem_Intel]

Hello WuYiLong

Thank you for posting in the Intel Ethernet community. 

We hope you're doing well. Since ptp4l only detects the local clock and not the GPS signal on the E810-XXVDA4T network card, please refer to the E810-XXVDA4T User Guide at the link below: 

[E810-XXVDA4T User Guide](https://www.intel.com/content/www/us/en/content-details/646265/intel-ethernet-network-adapter-e810-xxvda4t-user-guide.html)  

For further inquiries, you may register and request assistance from Intel Premier Support. If you need guidance on registration, please refer to the following article: 

[How to Register for Intel Premier Support](https://www.intel.com/content/www/us/en/support/articles/000057045/ethernet-products.html)  

Let us know if you need any further assistance. 

Regards, 

Azeem_Intel

[Suneesh]

Hello WuYiLong

Good day.

We are following up on this case. If further assistance is necessary, please do not hesitate to reply.

Regards,

Suneesh S

Intel Customer Support Technician

[Azeem_Intel]

Hello WuYiLong,

Thank you for contacting Intel.

This is the third follow-up regarding the reported issue. We're committed to ensuring a swift resolution and would greatly appreciate any updates or additional information you can provide.

If we don't hear back from you soon, we'll assume the issue has been resolved and will proceed to close the case.

Please feel free to respond to this email at your earliest convenience.

Regards,

Azeem

Intel Customer Support Technician