Re: [Linuxptp-devel] [PATCH v2] Add support for DELAY_REQ and SYNC packets RX filters

[Vladimir O. <ol...@gm...>]

Hi Ilia,

On Fri, Nov 24, 2023 at 10:29:12PM +0300, IlorDash wrote:
> From: Ilya Orazov <ilo...@gm...>
> 
> I’m using an Ethernet controller with PTP support, which requires
> determining which PTP packets on RX must be timestamped: SYNC or
> DELAY_REQ, based on whether the device is Slave or Master respectively.
> So I can’t use the EVENT RX filter and must dynamically switch RX
> filters, when port state changes from Master to Slave and vice versa.
> 
> Therefore this feature adds support for DELAY_REQ and SYNC packets
> RX filters. If the interface doesn’t support the EVENT RX filter
> (getting info about it through ethtool) then RX filters will dynamically
> switch between SYNC and DELAY_REQ when port state changes.
> 
> Signed-off-by: Ilya Orazov <ilo...@gm...>
> ---

What hardware are you targeting, specifically? I know the KSZ9477 DSA
switch family has this quirk as well.