From bfc17c1658353f22843c7c13e27c2d31950f1887 Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Sun, 16 Mar 2025 12:39:54 +0000
Subject: [PATCH] net: phy: realtek: disable PHY-mode EEE
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>
---
drivers/net/phy/realtek/realtek_main.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
--- a/drivers/net/phy/realtek/realtek_main.c
+++ b/drivers/net/phy/realtek/realtek_main.c
@@ -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 p
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);