S32GのトピックRe: ethtool --cable-test trx6 report error

ethtool --cable-test trx6 report error

liujialu_2024 — Wed, 17 Dec 2025 08:36:51 GMT

on the board of S32G-VNP-RDB2, check the cable "100Base-T1 TRX6".

The cable links well, and ping woks well, but cable-test report error:

root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code Unknown

root@s32g274ardb2:~# ./mdio pfeng-emac-2 mmd 0x0a:01 raw 0x8330
0x2007

0x2007 means: Unable to detect. then why?

test cable open is OK

root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code Open Circuit

root@s32g274ardb2:~# ./mdio pfeng-emac-2 mmd 0x0a:01 raw 0x8330
0x2002

test cable short is OK

root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code Short within Pair

root@s32g274ardb2:~# ./mdio pfeng-emac-2 mmd 0x0a:01 raw 0x8330
0x2001

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Wed, 17 Dec 2025 09:03:34 GMT

bsp 42.0

Linux s32g274ardb2 5.15.158-rt76 #1 SMP PREEMPT Wed Sep 11 13:48:24 UTC 2024 aarch64 aarch64
aarch64 GNU/Linux

Re: ethtool --cable-test trx6 report error

Joey_z — Wed, 17 Dec 2025 09:52:11 GMT

hi，liujialu_2024

Thank you for your information and question.

Could you share more information with me?

1.Do you test the BSP42 package that have not modified?

2.How do you change the 100Base-T1 port to eth port signals for the ping testing, which device are you using?

Joey

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Wed, 17 Dec 2025 10:11:16 GMT

1.Do you test the BSP42 package that have not modified?

v6.6.32 kernel does not support IPCF, so, we need v5.15.158 kernel.

2.How do you change the 100Base-T1 port to eth port signals for the ping testing, which device are you using?

according to the S32G2_LinuxBSP_42.0_User_Manual.pdf
chapter: 7.7.3 Enabling SJA1110 DSA driver, to enable DSA of SJA1110, then
$ ifconfig trx6 down
$ ifconfig trx6 192.168.2.123 up
my PC's ip address is 192.168.2.211, so ping can work now.

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Wed, 17 Dec 2025 10:20:58 GMT

1.Do you test the BSP42 package that have not modified?

with bsp 42.0 default image, it report error also.
root@s32g274ardb2:~# uname -r
6.6.32-rt32-00903-g49d9f8bb25e0
root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code Unknown
root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code Open Circuit

root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code Short within Pair

testings of Open and Short still work well.

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Wed, 17 Dec 2025 11:11:47 GMT

my T1-to-RJ45 device:

Re: ethtool --cable-test trx6 report error

Joey_z — Thu, 18 Dec 2025 03:50:24 GMT

hi,liujialu_2024

Thank you for your information and reply.

I use the default BS42 for this testing.

This is the test result for trx6.

root@s32g274ardb2:~# dmesg | grep -i "sja"
[ 0.828889] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 0.834314] sja1105 spi5.1: Port 2 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 0.851072] sja1105 spi5.1: Port 3 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 4.876989] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 4.882428] sja1105 spi5.1: Port 2 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 4.899197] sja1105 spi5.1: Port 3 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 5.053247] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 5.058672] sja1105 spi5.1: Port 2 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 5.075441] sja1105 spi5.1: Port 3 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 5.092543] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 5.097958] sja1105 spi5.1: Port 2 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 5.114723] sja1105 spi5.1: Port 3 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 7.103854] sja1110: loading out-of-tree module taints kernel.
[ 7.117294] SPI driver sja1110 has no spi_device_id for nxp,sja1110-switch
[ 7.124319] SPI driver sja1110 has no spi_device_id for nxp,sja1110-uc
[ 9.153856] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 9.159387] sja1105 spi5.1: Port 2 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 9.181619] sja1105 spi5.1: Port 3 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 9.430825] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 9.438127] sja1105 spi5.1: Port 2 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 9.454444] sja1105 spi5.1: Port 3 interpreting RGMII delay settings based on "phy-mode" property, please update device tree to specify "rx-internal-delay-ps" and "tx-internal-delay-ps"
[ 9.732411] sja1105 spi5.1: configuring for fixed/2500base-x link mode
[ 9.741123] sja1105 spi5.1: Link is Up - 2.5Gbps/Full - flow control off
[ 9.808065] sja1105 spi5.1 p1 (uninitialized): PHY [spi5.1-base-tx:01] driver [NXP CBTX (SJA1110)] (irq=POLL)
[ 9.856358] sja1105 spi5.1 trx5 (uninitialized): PHY [spi5.1-base-t1:01] driver [NXP C45 TJA1103] (irq=POLL)
[ 9.934013] sja1105 spi5.1 trx6 (uninitialized): PHY [spi5.1-base-t1:02] driver [NXP C45 TJA1103] (irq=POLL)
[ 10.011587] sja1105 spi5.1 trx7 (uninitialized): PHY [spi5.1-base-t1:03] driver [NXP C45 TJA1103] (irq=POLL)
[ 10.049845] sja1105 spi5.1 trx8 (uninitialized): PHY [spi5.1-base-t1:04] driver [NXP C45 TJA1103] (irq=POLL)
[ 10.085888] sja1105 spi5.1 trx9 (uninitialized): PHY [spi5.1-base-t1:05] driver [NXP C45 TJA1103] (irq=POLL)
[ 10.116363] sja1105 spi5.1 trx10 (uninitialized): PHY [spi5.1-base-t1:06] driver [NXP C45 TJA1103] (irq=POLL)
[ 592.917267] sja1105 spi5.1 trx5: configuring for phy/internal link mode
[ 772.869305] sja1105 spi5.1 trx6: configuring for phy/internal link mode
[ 1143.821448] sja1105 spi5.1 p1: configuring for phy/internal link mode
[ 1145.880585] sja1105 spi5.1 p1: Link is Up - 100Mbps/Full - flow control off
[ 1224.413285] sja1105 spi5.1 p2: configuring for fixed/rgmii-txid link mode
[ 1224.418540] sja1105 spi5.1 p2: Link is Up - 1Gbps/Full - flow control off
[ 1342.488176] sja1105 spi5.1 p1: Link is Down
[ 1444.408700] sja1105 spi5.1 trx6: Link is Up - 100Mbps/Full - flow control off
[ 1471.624407] sja1105 spi5.1 trx6: Link is Down
[ 1472.664709] sja1105 spi5.1 trx6: Link is Up - 100Mbps/Full - flow control off

root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code Open Circuit
root@s32g274ardb2:~# ethtool --cable-test trx6
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code OK
6.6.32-rt32-00903-g49d9f8bb25e0

1.Please compare the SJA1110 log information, check your firmware have installed successfully.

2.I tested the trx6 result of Pair A code OK, it only inserts into my converter device.

3.You also can try to test other port, such as the port as the trx5.

Hope this can help you.

Joey

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Thu, 18 Dec 2025 09:16:07 GMT

1.Please compare the SJA1110 log information, check your firmware have installed successfully.

[ 0.549758] gpio-24 (sja1110-rst-phy-t1): hogged as output/low
[ 0.555190] gpio-81 (sja1110-rst-core): hogged as output/low
[ 0.765003] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 4.447316] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 4.493501] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 4.493844] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 6.500528] sja1110: loading out-of-tree module taints kernel.
[ 6.506704] SPI driver sja1110 has no spi_device_id for nxp,sja1110-switch
[ 6.506721] SPI driver sja1110 has no spi_device_id for nxp,sja1110-uc
[ 8.091140] sja1105 spi5.1: Probed switch chip: SJA1110A
[ 9.035134] sja1105 spi5.1 p1 (uninitialized): PHY [spi5.1-base-tx:01] driver [NXP CBTX (SJA1110)] (irq=POLL)
[ 9.058996] sja1105 spi5.1: configuring for fixed/2500base-x link mode
[ 9.062630] sja1105 spi5.1: Link is Up - 2.5Gbps/Full - flow control off
[ 9.074566] sja1105 spi5.1 trx5 (uninitialized): PHY [spi5.1-base-t1:01] driver [NXP C45 TJA1103] (irq=POLL)
[ 9.088758] sja1105 spi5.1 trx6 (uninitialized): PHY [spi5.1-base-t1:02] driver [NXP C45 TJA1103] (irq=POLL)
[ 9.128177] sja1105 spi5.1 trx7 (uninitialized): PHY [spi5.1-base-t1:03] driver [NXP C45 TJA1103] (irq=POLL)
[ 9.165856] sja1105 spi5.1 trx8 (uninitialized): PHY [spi5.1-base-t1:04] driver [NXP C45 TJA1103] (irq=POLL)
[ 9.336509] sja1105 spi5.1 trx9 (uninitialized): PHY [spi5.1-base-t1:05] driver [NXP C45 TJA1103] (irq=POLL)
[ 9.372362] sja1105 spi5.1 trx10 (uninitialized): PHY [spi5.1-base-t1:06] driver [NXP C45 TJA1103] (irq=POLL)

2.I tested the trx6 result of Pair A code OK, it only inserts into my converter device.

Bold words in red is result of the command: ethtool --cable-test trx6
comand trx6 converter slave converter master
default slave slave Pair A code OK Pair A code Unknown
ethtool -s trx6 master-slave forced-master master Pair A code OK Pair A code OK

so if trx6 in slave and converter in master, it report Pair A code Unknown,
this just be the default application of trx6.
but if trx6 in master mode, it works well always, regardless of whether the converter operates in master mode or slave mode
This is really a bit strange.

3.You also can try to test other port, such as the port as the trx5.

trx5 and trx6 are identical

Re: ethtool --cable-test trx6 report error

Joey_z — Thu, 18 Dec 2025 10:54:22 GMT

hi，liujialu_2024

Thank you for your reply and information.

so if trx6 in slave and converter in master, it report Pair A code Unknown.

>>>How do you do your testing of Slave/master?

Joey

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Fri, 19 Dec 2025 06:02:23 GMT

# set trx6 in rdb2 shell
$ ethtool -s trx6 master-slave forced-slave
$ ethtool --cable-test trx6

t1-converter can swith master/slave using the dial switch

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Fri, 19 Dec 2025 07:50:45 GMT

About "Pair A code Unknown"，

google AI answers:

Common Causes:
Active Link: Performing the test while the Ethernet is plugged into a powered-on gigabit switch can interfere with results; it is often recommended to not be on an active link for TDR mode.

and from "um549820-UM11107 Software User Manual for SJA1110(2.0).pdf"

6.9.2 Cable test and TDR
the PHY can detect open and short circuits between the twisted-pair lines when neither of the link partners is transmitting.

Does the cable-test require connection but not activation?

Actually, trx6 linked with t1-converter, it's "Pair A code OK" when the converter's link LED not bling-bling.

On the contrary, when the LED bling-bling, it's "Pair A code Unknown"。

@Joey_z Please help confirm. Thank you.

Re: ethtool --cable-test trx6 report error

Joey_z — Fri, 19 Dec 2025 08:23:40 GMT

hi，liujialu_2024

Thank you for your reply.

I have helped you to test the slave mode of trx6.

root@s32g274ardb2:~# ip link set dev trx6 up
root@s32g274ardb2:~# ethtool -s trx6 master-slave forced-slave
root@s32g274ardb2:~# ethtool --cable-test trx6 //converter set to the Master
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code OK
root@s32g274ardb2:~# ethtool --cable-test trx6 //converter set to the slave
Cable test started for device trx6.
Cable test completed for device trx6.
Pair A code OK

The T1 LED still is bling-bling when I use the commend of ethtool --cable-test trx6. We do not use the same converter device.

Joey

Re: ethtool --cable-test trx6 report error

liujialu_2024 — Fri, 19 Dec 2025 08:35:08 GMT

but when trx6 in master mode.
$ ethtool -s trx6 master-slave forced-master
it always report "Pair A code OK", Whether the converter's LED bling-bling or not

Re: ethtool --cable-test trx6 report error

Joey_z — Fri, 19 Dec 2025 08:55:44 GMT

hi,liujialu

When you set the ethtool -s trx6 master-slave forced-master.

I think the converter should be set to slave. the LED of T1 will bling-bling using the ethtool --cable-test trx6.

Joey

comand	trx6	converter slave	converter master
default slave	slave	Pair A code OK	Pair A code Unknown
ethtool -s trx6 master-slave forced-master	master	Pair A code OK	Pair A code OK