Re: [Linuxptp-users] [Linuxptp-devel] Debugging ptp4l

[Keller, J. E <jac...@in...>]

> -----Original Message-----
> From: Richard Cochran [mailto:ric...@gm...]
> Sent: Thursday, May 30, 2013 10:54 AM
> To: Drasko DRASKOVIC
> Cc: lin...@li...
> Subject: Re: [Linuxptp-users] [Linuxptp-devel] Debugging ptp4l
> 
> On Thu, May 30, 2013 at 07:34:45PM +0200, Drasko DRASKOVIC wrote:
> >
> > What is :
> > ptp4l[234.056]: poll tx timestamp failed: No such file or directory
> > ptp4l[234.056]: port 1: send delay request failed
> >
> >
> > and how is it different than :
> > ptp4l[106753.952]: poll tx timestamp failed: Success
> > ptp4l[106753.952]: port 1: send sync failed
> > ptp4l[106753.952]: port 1: MASTER to FAULTY on FAULT_DETECTED
> (FT_UNSPECIFIED)
> >
> > that I was seeing on MASTER side before skb_tx_timestamp(skb) was
> > inserted in the driver ?
> 
> I guess that the wireless stack returns ENOENT because it doesn't have
> an error queue for the time stamps, or something like that.
> 
> HTH,
> Richard
> 

Yes, this is most likely the reason, but I also don't know for sure..

Drasko,

There are a lot of issues with enabling timestamping in the wireless devices. The framework which exists for Ethernet does not necessarily translate to wireless, and it would require a lot more work to enable it. Neither myself or Richard currently has the time, hardware, or experience to really debug this. This is really beyond the scope of the linuxptp mailing lists, as ptp4l is primarily designed with Ethernet in mind.

I am not sure where best to make a thread where you could get the help you need....

- Jake