Re: [Linuxptp-devel] Debugging ptp4l

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

On Thu, May 30, 2013 at 03:36:17PM +0200, Drasko DRASKOVIC wrote:

> ptp4l[106799.964]: poll tx timestamp failed: Success
> ptp4l[106799.964]: port 1: send sync failed
> 
> What is happening here and how to debug this ?

Your MAC driver is lacking transmit time stamp support. I don't know
what the pandaboard has (davinci_emac?), but you would need to add a
call to

 * skb_tx_timestamp() - Driver hook for transmit timestamping
 *
 * Ethernet MAC Drivers should call this function in their hard_xmit()
 * function immediately before giving the sk_buff to the MAC hardware.

in your MAC driver.

HTH,
Richard