On Thu, Dec 03, 2020 at 07:18:58PM +0200, Vladimir Oltean wrote: > Isn't this game over already? Who guarantees that the TC will be > synchronized within 215 seconds of the master, considering that the spec > doesn't even require the TC to synchronize to the GM in the first place, > just syntonize?
The ptp4l program can ensure this. It would have to check that synchronization is enabled, and that the estimated offset is reasonable. > Actually, for dpaa2, the one-step timestamping procedure just does: > > correctionField += t_TX - t_passed_inband > > where the driver populates: > t_passed_inband = originTimestamp = approximate PTP time of software packet > delivery ptp4l sets to originTimestamp zero! > So I don't actually care about one-step TC on sja1105 or in general. > This discussion however seems to be leaning towards the conclusion that > we should let sleeping dogs lie. Hardware one-step TCs should just do > their own thing and ptp4l is just concerned with the software based > ones. Ok. Yeah, I don't really see the benefit to the end users. Thanks, Richard _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
