6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Raju Lakkaraju <Raju.Lakkaraju@xxxxxxxxxxxxx>
[ Upstream commit 84383b5ef4cd21b4a67de92afdc05a03b5247db9 ]
The MDIX status is not accurately reflecting the current state after the link
partner has manually altered its MDIX configuration while operating in forced
mode.
Access information about Auto mdix completion and pair selection from the
KSZ9131's Auto/MDI/MDI-X status register
Fixes: b64e6a8794d9 ("net: phy: micrel: Add PHY Auto/MDI/MDI-X set driver for KSZ9131")
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@xxxxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Link: https://patch.msgid.link/20240725071125.13960-1-Raju.Lakkaraju@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/phy/micrel.c | 34 +++++++++++++++++++---------------
1 file changed, 19 insertions(+), 15 deletions(-)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 029c82f88ee38..9a0432145645f 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -1293,6 +1293,8 @@ static int ksz9131_config_init(struct phy_device *phydev)
const struct device *dev_walker;
int ret;
+ phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
+
dev_walker = &phydev->mdio.dev;
do {
of_node = dev_walker->of_node;
@@ -1342,28 +1344,30 @@ static int ksz9131_config_init(struct phy_device *phydev)
#define MII_KSZ9131_AUTO_MDIX 0x1C
#define MII_KSZ9131_AUTO_MDI_SET BIT(7)
#define MII_KSZ9131_AUTO_MDIX_SWAP_OFF BIT(6)
+#define MII_KSZ9131_DIG_AXAN_STS 0x14
+#define MII_KSZ9131_DIG_AXAN_STS_LINK_DET BIT(14)
+#define MII_KSZ9131_DIG_AXAN_STS_A_SELECT BIT(12)
static int ksz9131_mdix_update(struct phy_device *phydev)
{
int ret;
- ret = phy_read(phydev, MII_KSZ9131_AUTO_MDIX);
- if (ret < 0)
- return ret;
-
- if (ret & MII_KSZ9131_AUTO_MDIX_SWAP_OFF) {
- if (ret & MII_KSZ9131_AUTO_MDI_SET)
- phydev->mdix_ctrl = ETH_TP_MDI;
- else
- phydev->mdix_ctrl = ETH_TP_MDI_X;
+ if (phydev->mdix_ctrl != ETH_TP_MDI_AUTO) {
+ phydev->mdix = phydev->mdix_ctrl;
} else {
- phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
- }
+ ret = phy_read(phydev, MII_KSZ9131_DIG_AXAN_STS);
+ if (ret < 0)
+ return ret;
- if (ret & MII_KSZ9131_AUTO_MDI_SET)
- phydev->mdix = ETH_TP_MDI;
- else
- phydev->mdix = ETH_TP_MDI_X;
+ if (ret & MII_KSZ9131_DIG_AXAN_STS_LINK_DET) {
+ if (ret & MII_KSZ9131_DIG_AXAN_STS_A_SELECT)
+ phydev->mdix = ETH_TP_MDI;
+ else
+ phydev->mdix = ETH_TP_MDI_X;
+ } else {
+ phydev->mdix = ETH_TP_MDI_INVALID;
+ }
+ }
return 0;
}
--
2.43.0
