On 02.03.2019 21:34, Heiner Kallweit wrote: > On 02.03.2019 21:13, Andrew Lunn wrote: >> On Sat, Mar 02, 2019 at 04:57:32PM +0100, Heiner Kallweit wrote: >>> Propagate the external PHY settings also in 1000BaseX and >>> 2500BaseX mode. >> >> Hi Heiner >> > Hi Andrew > >> I don't think this is needed. 1000BaseX and 2500BaseX does not support >> inband signalling. So the mac_config() call for these modes should >> include the needed speed configuration. I've used 1000BaseX with an >> SFP and there was no need to configure anything. >> What I forgot: I can't explain why your SFP use case works. Was it also with this Marvell switch?
> 1000BaseX and 2500BaseX use 802.3z Clause 37 inband auto-neg. From what > I've read 1000BaseT is an extension of it. > My understanding is that w/o such inband signalling we had no chance > to detect a "link up" situation. All we could detect is: serial connection > is synced. Also my understanding is that the ACK to this inband signalling > triggers the "link up" interrupt. > > Here I found something: > http://www.methode.com/Documents/TechnicalLibrary/SFP_Ethernet_Auto_Negotiation.pdf > > I briefly looked at the SFP connector and there don't seem to be pins for > out-of-band signalling. So there must be some inband signalling. > >> Andrew >> > Heiner > Heiner
