netdev - [PATCH net-next 06/11] net: mtk_eth_soc: add out of band forcing of speed and duplex in pcs_link

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Date:   Thu, 27 Oct 2022 14:11:03 +0100
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Frank Wunderlich <frank-w@...lic-files.de>
Cc:     Eric Dumazet <edumazet@...gle.com>, Felix Fietkau <nbd@....name>,
        John Crispin <john@...ozen.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
        Sean Wang <sean.wang@...iatek.com>
Subject: [PATCH net-next 06/11] net: mtk_eth_soc: add out of band forcing of
 speed and duplex in pcs_link_up

Add support for forcing the link speed and duplex setting in the
pcs_link_up() method for out of band modes, which will be useful when
we finish converting the pcs_config() method. Until then, we still have
to force duplex for 802.3z modes to work correctly.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/mediatek/mtk_sgmii.c | 28 ++++++++++++++---------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_sgmii.c b/drivers/net/ethernet/mediatek/mtk_sgmii.c
index 868ff0b2e036..d26a0ba2e47b 100644
--- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
+++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
@@ -108,17 +108,23 @@ static void mtk_pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
 	struct mtk_pcs *mpcs = pcs_to_mtk_pcs(pcs);
 	unsigned int sgm_mode;
 
-	if (!phy_interface_mode_is_8023z(interface))
-		return;
-
-	/* SGMII force duplex setting */
-	if (duplex == DUPLEX_FULL)
-		sgm_mode = SGMII_DUPLEX_FULL;
-	else
-		sgm_mode = 0;
-
-	regmap_update_bits(mpcs->regmap, SGMSYS_SGMII_MODE,
-			   SGMII_DUPLEX_FULL, sgm_mode);
+	if (!phylink_autoneg_inband(mode) ||
+	    phy_interface_mode_is_8023z(interface)) {
+		/* Force the speed and duplex setting */
+		if (speed == SPEED_10)
+			sgm_mode = SGMII_SPEED_10;
+		else if (speed == SPEED_100)
+			sgm_mode = SGMII_SPEED_100;
+		else
+			sgm_mode = SGMII_SPEED_1000;
+
+		if (duplex == DUPLEX_FULL)
+			sgm_mode |= SGMII_DUPLEX_FULL;
+
+		regmap_update_bits(mpcs->regmap, SGMSYS_SGMII_MODE,
+				   SGMII_DUPLEX_FULL | SGMII_SPEED_MASK,
+				   sgm_mode);
+	}
 }
 
 static const struct phylink_pcs_ops mtk_pcs_ops = {
-- 
2.30.2