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net: phy: realtek: disable PHY-mode EEE

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Realtek RTL8211F has a "PHY-mode" EEE support which interferes with an
IEEE 802.3 compliant implementation. This mode defaults to enabled, and
results in the MAC receive path not seeing the link transition to LPI
state.

Fix this by disabling PHY-mode EEE.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/E1ttnHW-00785s-Uq@rmk-PC.armlinux.org.uk
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Russell King (Oracle)
2025-03-16 12:39:54 +00:00
committed by Paolo Abeni
parent 4b9235a880
commit bfc17c1658
1 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/phy/realtek/realtek_main.c
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@@ -33,6 +33,9 @@
#define RTL8211F_PHYCR1 0x18
#define RTL8211F_PHYCR2 0x19
#define RTL8211F_CLKOUT_EN BIT(0)
#define RTL8211F_PHYCR2_PHY_EEE_ENABLE BIT(5)
#define RTL8211F_INSR 0x1d
#define RTL8211F_LEDCR 0x10
@@ -55,8 +58,6 @@
#define RTL8211E_TX_DELAY BIT(12)
#define RTL8211E_RX_DELAY BIT(11)
#define RTL8211F_CLKOUT_EN BIT(0)
#define RTL8201F_ISR 0x1e
#define RTL8201F_ISR_ANERR BIT(15)
#define RTL8201F_ISR_DUPLEX BIT(13)
@@ -453,6 +454,12 @@ static int rtl8211f_config_init(struct phy_device *phydev)
str_enabled_disabled(val_rxdly));
}
/* Disable PHY-mode EEE so LPI is passed to the MAC */
ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
RTL8211F_PHYCR2_PHY_EEE_ENABLE, 0);
if (ret)
return ret;
if (priv->has_phycr2) {
ret = phy_modify_paged(phydev, 0xa43, RTL8211F_PHYCR2,
RTL8211F_CLKOUT_EN, priv->phycr2);