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From: Horatiu Vultur <horatiu.vultur@microchip.com>
To: <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
	<pabeni@redhat.com>
CC: <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<UNGLinuxDriver@microchip.com>, <maxime.chevallier@bootlin.com>, "Horatiu
 Vultur" <horatiu.vultur@microchip.com>
Subject: [PATCH net v2] net: lan966x: Fix port configuration when using SGMII interface
Date: Wed, 24 Jan 2024 11:17:58 +0100
Message-ID: <20240124101758.406068-1-horatiu.vultur@microchip.com>
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In case the interface between the MAC and the PHY is SGMII, then the bit
GIGA_MODE on the MAC side needs to be set regardless of the speed at
which it is running.

Fixes: d28d6d2e37d1 ("net: lan966x: add port module support")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>

---
v1->v2:
- update comment to match the changes to if condition
---
 drivers/net/ethernet/microchip/lan966x/lan966x_port.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
index 92108d354051c..2e83bbb9477e0 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_port.c
@@ -168,9 +168,10 @@ static void lan966x_port_link_up(struct lan966x_port *port)
 	lan966x_taprio_speed_set(port, config->speed);
 
 	/* Also the GIGA_MODE_ENA(1) needs to be set regardless of the
-	 * port speed for QSGMII ports.
+	 * port speed for QSGMII or SGMII ports.
 	 */
-	if (phy_interface_num_ports(config->portmode) == 4)
+	if (phy_interface_num_ports(config->portmode) == 4 ||
+	    config->portmode == PHY_INTERFACE_MODE_SGMII)
 		mode = DEV_MAC_MODE_CFG_GIGA_MODE_ENA_SET(1);
 
 	lan_wr(config->duplex | mode,
-- 
2.34.1