On Wed, Mar 16, 2022 at 02:02:08PM +0000, Modrzejewski, Pawel via 
Linuxptp-devel wrote:
> > The servo state is an internal variable has no relevance to outside 
> > observers.  
> > Apparently, me and Dale Smith are not the only ones interested in PTP servo 
> > state. See 
> > https://docs.baslerweb.com/precision-time-protocol#additional-parameters 
> > (Basler GigE cameras).
> > PtpServoStatus: Indicates the state of the clock servo, i.e., the state of 
> > the PTP clock synchronization. If the state is Locked, the clock of the 
> > current device is successfully synchronized with the master clock. In all 
> > other cases, the state is Unknown.
> 
> Hi,
> 
> I'm also using custom non-portable management option to query the servo(s) 
> state in my setup. What is more, I've added not only 'get but also 'set' 
> option and my phc2sys sends its servo state to ptp4l and you can check both 
> servos status with just one query.
> You may also check this thread: 
> https://sourceforge.net/p/linuxptp/mailman/message/37414815/ (servo: allows 
> servo state transition back from S3 to S2) where we discussed possibility to 
> change servo state back to S2 (can potentially cause some issues).

And this is why reporting s3 doesn't mean much at all.

Thanks,
Richard


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