Hi,

Peter Bergin <pe...@berginkonsult.se> writes:

> Hi,
>
> On 2021-10-13 00:19, Richard Cochran wrote:
>> On Tue, Oct 12, 2021 at 09:47:21PM +0200, Peter Bergin wrote:
>>> Hi,
>>>
>>> I'm currently working on a network product using gPTP configuration for PTP
>>> sync. The device shall be a AVB endpoint handling audio and according to
>>> Avnu specifications all endpoint shall be capable of being master on the
>>> network. Some plugins for AVB (such as gstreamer and alsa-plugins) require
>>> that system time (CLOCK_REALTIME) is in sync with PHC to get correct timing.
>>> I see different cases depending on if the device is master or slave. If the
>>> device is slave I would like to sync PHC to CLOCK_REALTIME. The other way
>>> around, if device is master I would like to sync CLOCK_REALTIME to PHC.
>>>
>>> To the question; is there a way to use phc2sys and handle this
>>> automatically?
>> phc2sys has an automatic mode.  See the man page for details.
>>
> Thanks! My bad, should have read man pages better. And I did try '-a' 
> but had issues with it. To summarize for other users:
>
>    $ ./phc2sys -a -r -r -q -m
>    phc2sys[412816.955]: Waiting for ptp4l...
>    phc2sys[412817.956]: Waiting for ptp4l...

One thing that could be missing is for phc2sys to use the same config
file as ptp4l, this should be more convenient, something like this:

$ ./phc2sys -a -r -r -q -m -f /etc/linuxptp/gPTP.cfg 


Cheers,
-- 
Vinicius


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