openwrt/target/linux/generic/backport-6.1/715-27-v6.5-net-pcs-lynxi-update-PCS-driver-to-use-neg_mode.patch

From 3b2de56a146f34e3f70a84cc3a1897064e445d16 Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Fri, 16 Jun 2023 13:06:43 +0100
Subject: [PATCH] net: pcs: lynxi: update PCS driver to use neg_mode

Update the Lynxi PCS driver to use neg_mode rather than the mode
argument. This ensures that the link_up() method will always program
the speed and duplex when negotiation is disabled.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1qA8Dz-00EaFY-5A@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/pcs/pcs-mtk-lynxi.c | 39 ++++++++++++++-------------------
 1 file changed, 16 insertions(+), 23 deletions(-)

--- a/drivers/net/pcs/pcs-mtk-lynxi.c
+++ b/drivers/net/pcs/pcs-mtk-lynxi.c
@@ -102,13 +102,13 @@ static void mtk_pcs_lynxi_get_state(stru
 					 FIELD_GET(SGMII_LPA, adv));
 }
 
-static int mtk_pcs_lynxi_config(struct phylink_pcs *pcs, unsigned int mode,
+static int mtk_pcs_lynxi_config(struct phylink_pcs *pcs, unsigned int neg_mode,
 				phy_interface_t interface,
 				const unsigned long *advertising,
 				bool permit_pause_to_mac)
 {
 	struct mtk_pcs_lynxi *mpcs = pcs_to_mtk_pcs_lynxi(pcs);
-	bool mode_changed = false, changed, use_an;
+	bool mode_changed = false, changed;
 	unsigned int rgc3, sgm_mode, bmcr;
 	int advertise, link_timer;
 
@@ -121,30 +121,22 @@ static int mtk_pcs_lynxi_config(struct p
 	 * we assume that fixes it's speed at bitrate = line rate (in
 	 * other words, 1000Mbps or 2500Mbps).
 	 */
-	if (interface == PHY_INTERFACE_MODE_SGMII) {
+	if (interface == PHY_INTERFACE_MODE_SGMII)
 		sgm_mode = SGMII_IF_MODE_SGMII;
-		if (phylink_autoneg_inband(mode)) {
-			sgm_mode |= SGMII_REMOTE_FAULT_DIS |
-				    SGMII_SPEED_DUPLEX_AN;
-			use_an = true;
-		} else {
-			use_an = false;
-		}
-	} else if (phylink_autoneg_inband(mode)) {
-		/* 1000base-X or 2500base-X autoneg */
-		sgm_mode = SGMII_REMOTE_FAULT_DIS;
-		use_an = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
-					   advertising);
-	} else {
+	else
 		/* 1000base-X or 2500base-X without autoneg */
 		sgm_mode = 0;
-		use_an = false;
-	}
 
-	if (use_an)
+	if (neg_mode & PHYLINK_PCS_NEG_INBAND)
+		sgm_mode |= SGMII_REMOTE_FAULT_DIS;
+
+	if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) {
+		if (interface == PHY_INTERFACE_MODE_SGMII)
+			sgm_mode |= SGMII_SPEED_DUPLEX_AN;
 		bmcr = BMCR_ANENABLE;
-	else
+	} else {
 		bmcr = 0;
+	}
 
 	if (mpcs->interface != interface) {
 		link_timer = phylink_get_link_timer_ns(interface);
@@ -216,14 +208,15 @@ static void mtk_pcs_lynxi_restart_an(str
 	regmap_set_bits(mpcs->regmap, SGMSYS_PCS_CONTROL_1, BMCR_ANRESTART);
 }
 
-static void mtk_pcs_lynxi_link_up(struct phylink_pcs *pcs, unsigned int mode,
+static void mtk_pcs_lynxi_link_up(struct phylink_pcs *pcs,
+				  unsigned int neg_mode,
 				  phy_interface_t interface, int speed,
 				  int duplex)
 {
 	struct mtk_pcs_lynxi *mpcs = pcs_to_mtk_pcs_lynxi(pcs);
 	unsigned int sgm_mode;
 
-	if (!phylink_autoneg_inband(mode)) {
+	if (neg_mode != PHYLINK_PCS_NEG_INBAND_ENABLED) {
 		/* Force the speed and duplex setting */
 		if (speed == SPEED_10)
 			sgm_mode = SGMII_SPEED_10;
@@ -286,6 +279,7 @@ struct phylink_pcs *mtk_pcs_lynxi_create
 	mpcs->regmap = regmap;
 	mpcs->flags = flags;
 	mpcs->pcs.ops = &mtk_pcs_lynxi_ops;
+	mpcs->pcs.neg_mode = true;
 	mpcs->pcs.poll = true;
 	mpcs->interface = PHY_INTERFACE_MODE_NA;