Re: [Linuxptp-users] PTP on Davinci(TI81xx)

[Delio B. <dbr...@au...>]

On Aug 30, 2013, at 4:51 PM, <sur...@wi...> wrote:

> SOC  
> DAVINCI 
> TI81xx 

Yes, but what are the "xx"? ;-)

> kernel-2.6.37 

This does not help me knowing which kernel you are using, but then I saw your forum post. See below.

From your other email:

> We are refering to this website where it is suggested to use linuxptp for TI boards
> 
> http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/p/204024/859216.aspx#859216

Oh I see, you were talking about TI's forum.

> Linuxptp web tells that davinci TI board is supported.
> http://linuxptp.sourceforge.net/
> ---------------------------------------------------------------------------
> davinci_emac	TI DaVinci, Sitara	SW	N	Y	3.1
> ----------------------------------------------------------------------------

AFAIK TI81XX SoCs (the 'DaVinci' name on those is misleading) do not use the davinci_emac driver, rather they use the cpsw driver.
From your forum post I see you are using a kernel from ezsdk 5_05_02_00. I cannot be sure without downloading/unpacking and checking, but I suspect the timestamping in the cpsw driver shipped with that kernel does not work well. You may want to try this repo <http://arago-project.org/git/projects/linux-omap3.git> (branch ti81xx-master), it *may* work better.

HTH
--
Delio

> ________________________________________
> From: Delio Brignoli [dbr...@au...]
> Sent: Friday, August 30, 2013 7:19 PM
> To: Suresh Udipi (WT01 - PES)
> Cc: lin...@li...
> Subject: Re: [Linuxptp-users] PTP on Davinci(TI81xx)
> 
> Hi Suresh,
> 
> On Aug 30, 2013, at 2:51 PM, <sur...@wi...> wrote:
> 
>> Hi,
>> 
>>   We are trying to bring up linuxptp on Ti81xx board (Davinci) board
> 
> Which SoC is it exactly and which kernel (compiled from which source repository/branch) are you using?
> 
>>   In the wiki it is mentioned that it is already been tested and working on Davinci/Sitara...
> 
> What are the URLs of the relevant wiki pages?
> 
>>   But we are not able to bring it up.
>> 
>>   Please let us know the usage of the ptp binaries on this boards.
> 
> [...]
> 
>> On client side we are getting the error
>> port 1: received SYNC without timestamp
>> ptp4l[1473.607]: port 1: bad message
>> 
>> 
>> Server is able to send the Anounce /SYNC / Follow UP message. But client is not responding..?/
>> 
>> Is the usage of ptp is correct?
> 
> linuxptp's command line options look OK to me (of course that depends on what you are trying to do). There is a problem with packet timestamping though.
> 
> Regards
> --
> Delio
> 
>