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| author | Daniel Golle <daniel@makrotopia.org> | 2023-04-03 01:21:57 +0300 |
|---|---|---|
| committer | Daniel Golle <daniel@makrotopia.org> | 2023-04-03 02:32:28 +0100 |
| commit | d98c8fc06ddd36f4b47c0eef8094e68257b92f87 (patch) | |
| tree | 7ea0caae4aed9bc386f909d585989eb6ba70d773 | |
| parent | 7e3284eef7f6d2bf270941fc0a94c95307db1ca5 (diff) | |
| download | upstream-d98c8fc06ddd36f4b47c0eef8094e68257b92f87.tar.gz upstream-d98c8fc06ddd36f4b47c0eef8094e68257b92f87.tar.bz2 upstream-d98c8fc06ddd36f4b47c0eef8094e68257b92f87.zip | |
generic: disable SGMII in-band AN for RealTek 2.5G PHYs
MAC drivers don't use SGMII in-band autonegotiation unless told to do so
in device tree using 'managed = "in-band-status"'. When using MDIO to
access a PHY, in-band-status is unneeded as we have link-status via
MDIO. Switch off SGMII in-band autonegotiation using magic values.
Reported-by: Chen Minqiang <ptpt52@gmail.com>
Reported-by: Chukun Pan <amadeus@jmu.edu.cn>
Reported-by: Yevhen Kolomeiko <jarvis2709@gmail.com>
Tested-by: Yevhen Kolomeiko <jarvis2709@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
| -rw-r--r-- | target/linux/generic/pending-5.15/725-net-phy-realtek-disable-SGMII-in-band-AN-for-2-5G-PHYs.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/target/linux/generic/pending-5.15/725-net-phy-realtek-disable-SGMII-in-band-AN-for-2-5G-PHYs.patch b/target/linux/generic/pending-5.15/725-net-phy-realtek-disable-SGMII-in-band-AN-for-2-5G-PHYs.patch new file mode 100644 index 0000000000..7f2174e4d2 --- /dev/null +++ b/target/linux/generic/pending-5.15/725-net-phy-realtek-disable-SGMII-in-band-AN-for-2-5G-PHYs.patch @@ -0,0 +1,43 @@ +From 2b1b8c4c215af7988136401c902338d091d408a1 Mon Sep 17 00:00:00 2001 +From: Daniel Golle <daniel@makrotopia.org> +Date: Mon, 3 Apr 2023 01:21:57 +0300 +Subject: [PATCH 2/2] net: phy: realtek: disable SGMII in-band AN for 2.5G PHYs + +MAC drivers don't use SGMII in-band autonegotiation unless told to do so +in device tree using 'managed = "in-band-status"'. When using MDIO to +access a PHY, in-band-status is unneeded as we have link-status via +MDIO. Switch off SGMII in-band autonegotiation using magic values. + +Reported-by: Chen Minqiang <ptpt52@gmail.com> +Reported-by: Chukun Pan <amadeus@jmu.edu.cn> +Reported-by: Yevhen Kolomeiko <jarvis2709@gmail.com> +Tested-by: Yevhen Kolomeiko <jarvis2709@gmail.com> +Signed-off-by: Daniel Golle <daniel@makrotopia.org> +--- + drivers/net/phy/realtek.c | 8 ++++++++ + 1 file changed, 8 insertions(+) + +--- a/drivers/net/phy/realtek.c ++++ b/drivers/net/phy/realtek.c +@@ -875,6 +875,7 @@ static irqreturn_t rtl9000a_handle_inter + static int rtl8221b_config_init(struct phy_device *phydev) + { + u16 option_mode; ++ int val; + + switch (phydev->interface) { + case PHY_INTERFACE_MODE_SGMII: +@@ -906,6 +907,13 @@ static int rtl8221b_config_init(struct p + break; + } + ++ /* Disable SGMII AN */ ++ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7588, 0x2); ++ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7589, 0x71d0); ++ phy_write_mmd(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7587, 0x3); ++ phy_read_mmd_poll_timeout(phydev, RTL8221B_MMD_SERDES_CTRL, 0x7587, val, ++ !(val & BIT(0)), 500, 100000, false); ++ + return 0; + } + |