diff options
Diffstat (limited to 'target/linux/generic/pending-4.19/751-net-phylink-make-Broadcom-BCM84881-based-SFPs-work.patch')
| -rw-r--r-- | target/linux/generic/pending-4.19/751-net-phylink-make-Broadcom-BCM84881-based-SFPs-work.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.19/751-net-phylink-make-Broadcom-BCM84881-based-SFPs-work.patch b/target/linux/generic/pending-4.19/751-net-phylink-make-Broadcom-BCM84881-based-SFPs-work.patch new file mode 100644 index 0000000000..1724d445b7 --- /dev/null +++ b/target/linux/generic/pending-4.19/751-net-phylink-make-Broadcom-BCM84881-based-SFPs-work.patch @@ -0,0 +1,58 @@ +From 3d8592a23dd67fb78ad85ddf711a059d3880fcb4 Mon Sep 17 00:00:00 2001 +From: Russell King <rmk+kernel@armlinux.org.uk> +Date: Fri, 8 Nov 2019 17:19:16 +0000 +Subject: [PATCH 654/660] net: phylink: make Broadcom BCM84881 based SFPs work + +The Broadcom BCM84881 does not appear to send the SGMII control word +when operating in SGMII mode, which causes network adapters to fail +to link with the PHY, or decide to operate at fixed 1G speed, even if +the PHY negotiated 100M. + +Work around this by detecting the Broadcom BCM84881 and switch to phy +mode rather than inband mode. + +Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> +--- + drivers/net/phy/phylink.c | 17 ++++++++++++++++- + 1 file changed, 16 insertions(+), 1 deletion(-) + +--- a/drivers/net/phy/phylink.c ++++ b/drivers/net/phy/phylink.c +@@ -1787,12 +1787,22 @@ static void phylink_sfp_link_up(void *up + phylink_run_resolve(pl); + } + ++/* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII ++ * or 802.3z control word, so inband will not work. ++ */ ++static bool phylink_phy_no_inband(struct phy_device *phy) ++{ ++ return phy->is_c45 && ++ (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150; ++} ++ + static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy) + { + struct phylink *pl = upstream; + __ETHTOOL_DECLARE_LINK_MODE_MASK(supported); + __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising); + phy_interface_t interface; ++ u8 mode; + int ret; + + /* +@@ -1807,8 +1817,13 @@ static int phylink_sfp_connect_phy(void + ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported); + ethtool_convert_legacy_u32_to_link_mode(advertising, phy->advertising); + ++ if (phylink_phy_no_inband(phy)) ++ mode = MLO_AN_PHY; ++ else ++ mode = MLO_AN_INBAND; ++ + /* Do the initial configuration */ +- ret = phylink_sfp_config(pl, ML_AN_INBAND, supported, advertising); ++ ret = phylink_sfp_config(pl, mode, supported, advertising); + if (ret < 0) + return ret; + |