RE: AST2600 EVB eth0 (MAC1) Issue

[Troy Lee <troy_lee@aspeedtech.com>]

Hi Graeme,

We'd like to ask you to dump SCU registers (0x1e6e2000 ~ 0x1e6e2fff) with your current image, then we could check the mac clock delay is correctly set. 
You could use UART debug controller (datasheet section 11) if devmem is not available.

Thanks,
Troy Lee

> -----Original Message-----
> From: Graeme Gregory <quic_ggregory@quicinc.com>
> Sent: Friday, September 24, 2021 5:23 AM
> To: Troy Lee <troy_lee@aspeedtech.com>; OpenBMC Maillist
> <openbmc@lists.ozlabs.org>
> Subject: Re: AST2600 EVB eth0 (MAC1) Issue
> 
> On 23/09/2021 10:09, Troy Lee wrote:
> > Hi Gaeme,
> >
> > Which soc revision and evb board revision are you using?
> > Can you try to use phy-mode = "rgmii-rxid" for eth0/1 in your dts?
> >
> > Thanks,
> > Troy Lee
> 
> Hi Troy,
> 
> Soc Rev:-
> 
> U-Boot 2019.04-00083-ge5902174d9-dirty (Sep 22 2021 - 15:10:03 +0000)
> 
> SOC: AST2600-A1
> 
> 
> EVB Rev:-
> 
> AST2600-DDR4 EVB V1.4
> 
> 
> phy-mode = "rgmii-rxid" instead of "rgmii" improves the issue and I now get
> DHCP on that interface, but packet loss is still hight compared to
> eth1 (MAC2).
> 
> eth0
> ping -f 192.168.222.119
> PING 192.168.222.119 (192.168.222.119) 56(84) bytes of data.
> ................................................................................................................
> ................................................................................................................
> .............................................................................................^C
> --- 192.168.222.119 ping statistics ---
> 597 packets transmitted, 330 received, 44.7236% packet loss, time 6775ms
> rtt min/avg/max/mdev = 0.078/809.845/3266.263/1099.208 ms, pipe 205,
> ipg/ewma 11.367/30.024 ms
> 
> eth1
> ping -f 192.168.222.30
> [sudo] password for ggregory:
> PING 192.168.222.30 (192.168.222.30) 56(84) bytes of data.
> .^C
> --- 192.168.222.30 ping statistics ---
> 50591 packets transmitted, 50590 received, 0.00197664% packet loss, time
> 5550ms rtt min/avg/max/mdev = 0.083/0.105/0.816/0.004 ms, ipg/ewma
> 0.109/0.104 ms
> 
> Thanks
> 
> Graeme
> 
> >> -----Original Message-----
> >> From: openbmc <openbmc-
> >> bounces+troy_lee=aspeedtech.com@lists.ozlabs.org> On Behalf Of
> Graeme
> >> Gregory
> >> Sent: Wednesday, September 22, 2021 11:49 PM
> >> To: OpenBMC Maillist <openbmc@lists.ozlabs.org>
> >> Subject: AST2600 EVB eth0 (MAC1) Issue
> >>
> >> Hi,
> >>
> >> I know A0 versions of the AST2600 had an issue where eth0 was not
> >> working, but the errata indicates this is fixed in later revisions.
> >>
> >> I am seeing an issue on the EVB board though where eth0 (MAC1) is not
> >> functional. The other three ports all function as expected.
> >>
> >> On my DHCP host machine I can see DHCP requests from the AST2600,
> and
> >> replies are sent. Looking at /proc/interrupts it looks very much like
> >> no IRQs are ever generated for incoming packets.
> >>
> >> Thanks
> >>
> >> Graeme
> >>