linuxptp-users

[Linuxptp-users] Layer 2 ptp on Nvidia Orin

[Greiner, A. <and...@iv...>]

Hello,

we are currently trying to use ptp4l on a NVIDIA Orin to sync with a couple of sensors using layer 2 ptp.
However, we get an error when starting the master instance on the Orin.

               uam@hubble:~$ sudo ptp4l -i eth0 -m -2 -l 7
               ptp4l[922.980]: selected /dev/ptp0 as PTP clock
               ptp4l[923.053]: driver rejected most general HWTSTAMP filter
               ptp4l[923.059]: ioctl SIOCSHWTSTAMP failed: Numerical result out of range
               ptp4l[923.120]: port 1 (eth0): INITIALIZING to FAULTY on FAULT_DETECTED (FT_UNSPECIFIED)
               ptp4l[923.121]: port 0 (/var/run/ptp4l): INITIALIZING to LISTENING on INIT_COMPLETE
               ptp4l[923.121]: port 0 (/var/run/ptp4lro): INITIALIZING to LISTENING on INIT_COMPLETE

As far as I can tell it should be supported by the hardware though, as this output of ethtool suggests:

               uam@hubble:~$ ethtool -T eth0
               Time stamping parameters for eth0:
               Capabilities:
                              hardware-transmit     (SOF_TIMESTAMPING_TX_HARDWARE)
                              software-transmit     (SOF_TIMESTAMPING_TX_SOFTWARE)
                              hardware-receive      (SOF_TIMESTAMPING_RX_HARDWARE)
                              software-receive      (SOF_TIMESTAMPING_RX_SOFTWARE)
                              software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
                              hardware-raw-clock    (SOF_TIMESTAMPING_RAW_HARDWARE)
               PTP Hardware Clock: 0
               Hardware Transmit Timestamp Modes:
                              off                   (HWTSTAMP_TX_OFF)
                              on                    (HWTSTAMP_TX_ON)
                              one-step-sync         (HWTSTAMP_TX_ONESTEP_SYNC)
               Hardware Receive Filter Modes:
                              none                  (HWTSTAMP_FILTER_NONE)
                              ptpv1-l4-sync         (HWTSTAMP_FILTER_PTP_V1_L4_SYNC)
                              ptpv1-l4-delay-req    (HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ)
                              ptpv2-l4-sync         (HWTSTAMP_FILTER_PTP_V2_L4_SYNC)
                              ptpv2-l4-delay-req    (HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ)
                              ptpv2-l2-sync         (HWTSTAMP_FILTER_PTP_V2_L2_SYNC)
                              ptpv2-l2-delay-req    (HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ)
                              ptpv2-event           (HWTSTAMP_FILTER_PTP_V2_EVENT)

We are using these versions:

ptp4l: 3.1-00224-gd4adf87
kernel: 5.10.104-tegra

Are there any mistakes on our side? What else can we try?

Kind regards,
Andreas

Re: [Linuxptp-users] Layer 2 ptp on Nvidia Orin

[Richard C. <ric...@gm...>]

On Mon, Apr 10, 2023 at 07:09:23PM +0000, Greiner, Andreas wrote:
> We are using these versions:
> 
> ptp4l: 3.1-00224-gd4adf87
> kernel: 5.10.104-tegra
> 
> Are there any mistakes on our side? What else can we try?

This is likely a bug in the vendor kernel.  You should ask them to fix
it for you.

Thanks,
Richard