PTP frequency correction on i.MX7Dual Sabre board does not work

[aleks_007]

Hi,

I have yocto 6.18-whinlatter build on imx7dsabresd. Board eth1 is connected directly to Gb Eth port on ubuntu pc acting as GMC.

Setup: timestamp: hardware, L2, E2E (same on both sides). Tried also P2P without any change.

Status: 

• ptp4l itself is running and processing traffic
• ptp4l itself is running and processing traffic
• L2 transport is at least partially working
• The servo loop is running (but not converging)
• Clock adjustment interface is reachable

What is not working

• No real synchronization (offset ~70 seconds)
• No servo convergence

Output from sabre board:

journalctl -u ptp4l -f
Apr 22 17:09:40 sabre ptp4l[2464]: ptp4l[155781.900]: rms 71226758544 max 71226804804 freq +7663667 +/- 0 delay -116854 +/- 0
Apr 22 17:09:41 sabre ptp4l[2464]: ptp4l[155783.700]: rms 71228752192 max 71229030928 freq +7663667 +/- 0 delay -132657 +/- 0
Apr 22 17:09:43 sabre ptp4l[2464]: ptp4l[155785.500]: rms 71228944076 max 71229050017 freq +7663667 +/- 0 delay -77441 +/- 55216
Apr 22 17:09:45 sabre ptp4l[2464]: ptp4l[155787.300]: rms 71229661065 max 71230564551 freq +7663667 +/- 0 delay 1673 +/- 0
Apr 22 17:09:47 sabre ptp4l[2464]: ptp4l[155789.101]: rms 71231298512 max 71231338212 freq +7663667 +/- 0 delay 1673 +/- 0
Apr 22 17:09:49 sabre ptp4l[2464]: ptp4l[155790.901]: rms 71231204103 max 71231241274 freq +7663667 +/- 0 delay 1673 +/- 0
Apr 22 17:09:50 sabre ptp4l[2464]: ptp4l[155792.701]: rms 70167499092 max 71233271909 freq +7663667 +/- 0 delay -4187 +/- 0
Apr 22 17:09:52 sabre ptp4l[2464]: ptp4l[155794.501]: rms 71233298545 max 71233330758 freq +7663667 +/- 0 delay -3246 +/- 941
Apr 22 17:09:54 sabre ptp4l[2464]: ptp4l[155796.301]: rms 71233259853 max 71233297985 freq +7663667 +/- 0 delay 1846 +/- 0
Apr 22 17:09:56 sabre ptp4l[2464]: ptp4l[155798.102]: rms 71235540484 max 71235852602 freq +7663667 +/- 0 delay -6786 +/- 1960

Question: Was anyone being able to get PTP with L2 transport (E2E or P2P) working on imx7dsabresd?

[kef2]

ptp4l synchronizes PTP clocks. phc2sys is used to synchronize system clock to PTP clock.

[aleks_007]

Yes, both services are running, but still with offset