netdev - [RFC PATCH v2 3/8] net: phylink: call mac_an_restart for SGMII/QSGMII inband interfaces too

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Date:   Wed, 18 Dec 2019 00:18:26 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     davem@...emloft.net, jakub.kicinski@...ronome.com,
        linux@...linux.org.uk, andrew@...n.ch, f.fainelli@...il.com,
        vivien.didelot@...il.com
Cc:     alexandru.marginean@....com, claudiu.manoil@....com,
        xiaoliang.yang_1@....com, yangbo.lu@....com,
        netdev@...r.kernel.org, alexandre.belloni@...tlin.com,
        horatiu.vultur@...rochip.com,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [RFC PATCH v2 3/8] net: phylink: call mac_an_restart for SGMII/QSGMII inband interfaces too

From: Vladimir Oltean <vladimir.oltean@....com>

It doesn't quite make sense why restarting the AN process should be
unique to 802.3z (1000Base-X) modes. It is valid to put an SGMII PCS in
in-band AN mode, therefore also make PHYLINK re-trigger an
auto-negotiation if needed.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/phy/phylink.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index f9ad794cfee1..0e563c22d725 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -358,7 +358,9 @@ static void phylink_mac_config_up(struct phylink *pl,
 static void phylink_mac_an_restart(struct phylink *pl)
 {
 	if (pl->link_config.an_enabled &&
-	    phy_interface_mode_is_8023z(pl->link_config.interface))
+	    (phy_interface_mode_is_8023z(pl->link_config.interface) ||
+	     pl->link_config.interface == PHY_INTERFACE_MODE_SGMII ||
+	     pl->link_config.interface == PHY_INTERFACE_MODE_QSGMII))
 		pl->ops->mac_an_restart(pl->config);
 }
 
-- 
2.7.4