TDA4VH-Q1: how to enable TDA4VH eval board 10G XFI interface function

 I want use  TDA4VH eval board 10G XFI mode(not USXGMII mode), I don't know how to set.

Thank you for your reply !

I see the file k3-j784s4-evm-usxgmii-exp1-exp2.dtso:

&main_cpsw0_port1 {
status = "okay";
phy-mode = "usxgmii";
mac-address = [00 00 00 00 00 00];
phys = <&cpsw0_phy_gmii_sel 1>, <&serdes2_usxgmii_link>;
phy-names = "mac", "serdes";
fixed-link {
       speed = <5000>;
       full-duplex;
};
};

If I want to use 10G XFI mode(not USXGMII mode), only change speed = <5000> to speed = <10000>,   It is right?

Best Regards,

kevin 

Hi Kevin,

Thats correct.

Regards,
Tanmay

Hi Tanmay,

when I set speed = <10000>, find dmesg  log :

[ 2.413893] am65-cpsw-nuss c000000.ethernet (unnamed net_device) (uninitialized): fixed link full duplex 10000Mbps not recognised
[ 2.425541] am65-cpsw-nuss c000000.ethernet (unnamed net_device) (uninitialized): fixed link full duplex 10000Mbps not recognised

that's OK?

Best Regards,

kevin 

Hi Tanmay,

              I use external 10G XFI interface to connect TDA4 XFI interface,  them linked up.   What's more, external 10G XFI interface have been enabled   

Auto-Negotiation mode, It shows TDA4 XFI interface speed was 5G not 10G,   I use iperf tool for testing, found TDA4 XFI interface speed was 5G too.

1. TDA4VH dmesg log shows 10Gbps: 

[ 7.845386] am65-cpsw-nuss c000000.ethernet eth2: configuring for fixed/usxgmii link mode
[ 7.854068] am65-cpsw-nuss c000000.ethernet eth2: Link is Up - 10Gbps/Full - flow control off
[ 7.868727] am65-cpsw-nuss c000000.ethernet eth1: configuring for fixed/usxgmii link mode
[ 7.876926] am65-cpsw-nuss c000000.ethernet eth1: Link is Up - 10Gbps/Full - flow control off

2.   root@j784s4-evm:~# ethtool eth1
Settings for eth1:
Supported ports: [ MII ]
Supported link modes: 10000baseCR/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10000baseCR/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10000baseCR/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: No
Link partner advertised FEC modes: Not reported
Speed: 10000Mb/s
Duplex: Full
Auto-negotiation: on
Port: MII
PHYAD: 0
Transceiver: internal
Supports Wake-on: d
Wake-on: d
Current message level: 0x000020f7 (8439)
drv probe link ifdown ifup rx_err tx_err hw
Link detected: yes

TDA4VH XFI and USXGMII both support 10G/5G modes?   If support ,  Why does TDA4VH show 10G, but actually 5G? 

Best Regards 

Kevin

Hi Kevin,

Can you please explain where do you see the auto-negotiated speed at 5G?

With iperf, the software reaches a CPU loading bottle neck before 10G speeds are achieved. So from standard linux network stack, a speed of 10G is not expected.

Regards,
Tanmay

Hi Tanmay,

                My test networking:   tda4<----->switch<-------->x86,      switch port1 connect with tda4,      switch port2 connect with x86,    I found port1 is 5G and

port2 is 10G in switch. iperf test is 5G. 

               I use x86<----> switch<------->x86 for testing again, switch port1 and port2 connect with two x86,  I found port 1 and port 2 are 10G in switch , iperf

test is 10G.

Best Regards

Kevin

Hi Kevin,

Let me see if we have anything on either CPSW MAC and/or on serdes which can give us some information about actual bit rate on link.

According to my knowledge, we do not have anything for this. Both MACs are supposed to communicate and configure the serdes for a common link rate.

Can you let me know which switch you are using? Also are you reading some register on the switch which tells you the port is configured as 5G?

Regards,
Tanmay

Hi Tanmay,

                  We use Microchip Switch,  Switch provides a series of configuration and viewing commands in cli.   I enter some commands in swtich cli (show interface xxx),    It shows the  switch port   connect with x86  was 10G, tda4 was 5G.

                   Which register can be configured as 10G XFI mode  and which register can be checked to see if it is configured as 10G in tda4 ?  thanks!

Best Regards

Kevin

Hi Kevin,

kevin kevin said:

Which register can be configured as 10G XFI mode  and which register can be checked to see if it is configured as 10G in tda4 ?  thanks!

I am still checking up on this with the hardware experts. I will get back to you as soon as get a response from the hardware team.

Regards,
Tanmay

Hi Tanmay,

1.  I am still checking up on this with the hardware experts. I will get back to you as soon as get a response from the hardware team. 

        ---------  Any progress?

2. As far as you know,   why the  TDA4 XFI speed  change to 5G generally? software or hardware problems, maybe  .......? 

Best Regards

Kevin