[PATCH 6.18 140/227] net: pcs: pcs-mtk-lynxi: report in-band capability for 2500Base-X

Greg Kroah-Hartman
2026-01-28T15:59:44Z

From: Daniel Golle <daniel@makrotopia.org>

[ Upstream commit e8ca461f7d19464b47c64fe4cf2f83162421bcc0 ]

It turns out that 2500Base-X actually works fine with in-band status on
MediaTek's LynxI PCS -- I wrongly concluded it didn't because it is
broken in all the copper SFP modules and GPON sticks I used for testing.

Hence report LINK_INBAND_ENABLE also for 2500Base-X mode.

This reverts most of commit a003c38d9bbb ("net: pcs: pcs-mtk-lynxi:
correctly report in-band status capabilities").

The removal of the QSGMII interface mode was correct and is left
untouched.

Link: https://github.com/openwrt/openwrt/issues/21436
Fixes: a003c38d9bbb ("net: pcs: pcs-mtk-lynxi: correctly report in-band status capabilities")
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/b1cf26157b63fee838be09ae810497fb22fd8104.1768961746.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/pcs/pcs-mtk-lynxi.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/pcs/pcs-mtk-lynxi.c b/drivers/net/pcs/pcs-mtk-lynxi.c
index 149ddf51d7856..87df3a9dfc9bc 100644
--- a/drivers/net/pcs/pcs-mtk-lynxi.c
+++ b/drivers/net/pcs/pcs-mtk-lynxi.c
@@ -93,12 +93,10 @@ static unsigned int mtk_pcs_lynxi_inband_caps(struct phylink_pcs *pcs,
{
switch (interface) {
case PHY_INTERFACE_MODE_1000BASEX:
+ case PHY_INTERFACE_MODE_2500BASEX:
case PHY_INTERFACE_MODE_SGMII:
return LINK_INBAND_DISABLE | LINK_INBAND_ENABLE;

- case PHY_INTERFACE_MODE_2500BASEX:
- return LINK_INBAND_DISABLE;
-
default:
return 0;
}
--
2.51.0