Tool/software:
Hello TI Support Team,
We are working with two custom AM4376 boards, both using the same software and hardware configuration. Each board has 512MB NAND and 500MB DDR. The first board is working fine with Ethernet, where the Transceiver is detected as "external" and the connection is established without any issues.
Board 1:
Ethernet works fine.
ethtool reports the transceiver as external.
Log (Board 1):
Transceiver: external
Link detected: yes
However, on the second board, we are encountering a problem. The Transceiver is detected as "internal," and the Ethernet is not coming up. Both boards use separate SoC to PHY connections, and the PHY is external on both. Despite this, the second board is not behaving as expected.
Log (Board 2):
Transceiver: internal
Link detected: yes
Could you provide guidance on:
Why Board 2 detects the transceiver as internal instead of external?
Possible steps to debug or resolve this issue.
Any specific configuration or software adjustments required for PHY detection in this case.
Thank you!
Best regards
Both board logs
============
Board 1 log //working
============
root@am437x-evm:~# ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 100baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 100baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric Receive-only
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 1
Transceiver: external
MDI-X: Unknown
Link detected: yes
Board 2 log //Not working
=============
root@am437x-evm:~# ifconfig
eth0 Link encap:Ethernet HWaddr 90:06:F2:B6:C4:32
inet6 addr: fe80::9206:f2ff:feb6:c432/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:50 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:11264 (11.0 KiB)
eth1 Link encap:Ethernet HWaddr F6:45:D9:61:F5:46
inet6 addr: fe80::f445:d9ff:fe61:f546/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:105 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:22170 (21.6 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:2 errors:0 dropped:0 overruns:0 frame:0
TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:140 (140.0 B) TX bytes:140 (140.0 B)
root@am437x-evm:~#
root@am437x-evm:~#
root@am437x-evm:~#
root@am437x-evm:~#
root@am437x-evm:~# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 100baseT/Full
Supported pause frame [ 460.017519] Karthi phy_ethtool_ksettings_get 266
use: No
Supports auto-negotiation: Yes
Supported FEC modes: [ 460.017560] Abinash 0
Not reported
Advertised link modes: 100baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric Receive-only
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Link detected: yes
root@am437x-evm:~# ethtool eth1
Settings for eth1:
Supported ports: [ TP MII ]
Supported link modes: 100base[ 463.819106] Karthi phy_ethtool_ksettings_get 266
T/Full
Supported pause frame use: No
Supports auto-negotiat[ 463.819148] Abinash 0
ion: Yes
Supported FEC modes: Not reported
Advertised link modes: 100baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric Receive-only
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Link detected: yes
