Clearfog Pro mv88e6xxx works w/Linux 5.0.1 but not later ver

[moonman]

The LAN ports on my Clearfog Pro's DSA switch are not working when using a current kernel.
They are working with an old 5.0.1 kernel.

With linux-armv7-5.1.0-1-armv7h.pkg.tar.xz through linux-armv7-5.2.7-1-armv7h.pkg.tar.xz
I get:

$this->bbcode_second_pass_code('', 'Aug 08 10:26:30 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 10:26:30 reynardine.trickster.gods systemd-modules-load[197]: Inserted module 'mv88e6xxx'
Aug 08 10:26:30 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1')

Then it loops logging these two lines as long as the kernel is still running:

$this->bbcode_second_pass_code('', 'Aug 08 10:26:32 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 10:26:32 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
Aug 08 10:26:32 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 10:26:32 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
[...and so on...]

Counts:
$ journalctl -b -0 | egrep -c 'mv88e6xxx|mv88e6085'
143214

$ journalctl -b -0 | egrep 'mv88e6xxx|mv88e6085' | egrep -vc 'probed|detected'
1')

When I downgraded to linux-armv7-5.0.10-1-armv7h.pkg.tar.xz and it just works.

$this->bbcode_second_pass_code('', '$ journalctl -b -0 | egrep 'mv88e6xxx|mv88e6085'
Aug 08 14:43:29 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
Aug 08 14:43:30 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 14:43:30 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
Aug 08 14:43:30 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 14:43:30 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
Aug 08 14:43:30 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 14:43:30 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
Aug 08 14:43:30 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 14:43:30 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
Aug 08 14:43:29 reynardine.trickster.gods systemd-modules-load[199]: Inserted module 'mv88e6xxx'
Aug 08 14:43:30 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 14:43:30 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04: switch 0x1760 detected: Marvell 88E6176, revision 1
Aug 08 14:43:31 reynardine.trickster.gods kernel: libphy: mv88e6xxx SMI: probed
Aug 08 14:43:32 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan5 (uninitialized): PHY [mv88e6xxx-5:00] driver [Marvell 88E1540]
Aug 08 14:43:32 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan4 (uninitialized): PHY [mv88e6xxx-5:01] driver [Marvell 88E1540]
Aug 08 14:43:32 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan3 (uninitialized): PHY [mv88e6xxx-5:02] driver [Marvell 88E1540]
Aug 08 14:43:32 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan2 (uninitialized): PHY [mv88e6xxx-5:03] driver [Marvell 88E1540]
Aug 08 14:43:32 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan1 (uninitialized): PHY [mv88e6xxx-5:04] driver [Marvell 88E1540]
Aug 08 14:43:33 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan3: configuring for phy/gmii link mode
Aug 08 14:43:33 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan5: configuring for phy/gmii link mode
Aug 08 14:43:33 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan1: configuring for phy/gmii link mode
Aug 08 14:43:33 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan2: configuring for phy/gmii link mode
Aug 08 14:43:33 reynardine.trickster.gods kernel: mv88e6085 f1072004.mdio-mii:04 lan4: configuring for phy/gmii link mode')

Does anyone else see this too?

[moonman]

It has been fixed in 5.2.9-2

[Mettacrawler]

Thanks for turning on CONFIG_PHY_MVEBU_A38X_COMPHY

[Mettacrawler]

I tried using 5.2.10-10. The lan ports show up but...

With 5.0.1 the network ports that are connected to cables are "enslaved" and "configured":
$this->bbcode_second_pass_code('', '$ networkctl -a
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 br0 bridge degraded-carrier configured
3 eth0 ether routable configured
4 eth1 ether degraded configured
5 eth2 ether off unmanaged
6 lan5 dsa enslaved configured
7 lan4 dsa no-carrier configuring
8 lan3 dsa enslaved configured
9 lan2 dsa no-carrier configuring
10 lan1 dsa enslaved configured
11 lan6 dsa off unmanaged
12 wlan0 wlan off unmanaged
13 wlan1 wlan off unmanaged

13 links listed.')

Changing only the kernel from 5.0.1 to 5.2.10-2 the lan ports are all "off":
$this->bbcode_second_pass_code('', '$ networkctl -a
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
2 br0 bridge degraded-carrier configured
3 eth0 ether routable configured
4 eth1 ether degraded configured
5 eth2 ether off unmanaged
6 lan5 dsa off configuring
7 lan4 dsa off configuring
8 lan3 dsa off configuring
9 lan2 dsa off configuring
10 lan1 dsa off configuring
11 lan6 dsa off unmanaged
12 wlan0 wlan degraded unmanaged
13 wlan1 wlan degraded unmanaged

13 links listed.')
Changing the kernel back restores the behavior.
I will try the advice here:
https://github.com/systemd/systemd/issues/7478#issuecomment-514562190