net: phylink: Use phy_caps_lookup for fixed-link configuration

When phylink creates a fixed-link configuration, it finds a matching
linkmode to set as the advertised, lp_advertising and supported modes
based on the speed and duplex of the fixed link.

Use the newly introduced phy_caps_lookup to get these modes instead of
phy_lookup_settings(). This has the side effect that the matched
settings and configured linkmodes may now contain several linkmodes (the
intersection of supported linkmodes from the phylink settings and the
linkmodes that match speed/duplex) instead of the one from
phy_lookup_settings().

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20250307173611.129125-10-maxime.chevallier@bootlin.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: minimaxwell

drivers/net/phy/phylink.c

@@ -802,12 +802,26 @@ static int phylink_validate(struct phylink *pl, unsigned long *supported,
 	return phylink_validate_mac_and_pcs(pl, supported, state);
 }
 
+static void phylink_fill_fixedlink_supported(unsigned long *supported)
+{
+	linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, supported);
+	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, supported);
+}
+
 static int phylink_parse_fixedlink(struct phylink *pl,
 				   const struct fwnode_handle *fwnode)
 {
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(match) = { 0, };
 	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+	const struct link_capabilities *c;
 	struct fwnode_handle *fixed_node;
-	const struct phy_setting *s;
 	struct gpio_desc *desc;
 	u32 speed;
 	int ret;
@@ -875,12 +889,16 @@ static int phylink_parse_fixedlink(struct phylink *pl,
 		phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
 			     pl->link_config.speed);
 
-	linkmode_fill(pl->supported);
+	linkmode_zero(pl->supported);
+	phylink_fill_fixedlink_supported(pl->supported);
+
 	linkmode_copy(pl->link_config.advertising, pl->supported);
 	phylink_validate(pl, pl->supported, &pl->link_config);
 
-	s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
-			       pl->supported, true);
+	c = phy_caps_lookup(pl->link_config.speed, pl->link_config.duplex,
+			    pl->supported, true);
+	if (c)
+		linkmode_and(match, pl->supported, c->linkmodes);
 
 	linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, mask);
 	linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask);
@@ -889,9 +907,10 @@ static int phylink_parse_fixedlink(struct phylink *pl,
 
 	phylink_set(pl->supported, MII);
 
-	if (s) {
-		__set_bit(s->bit, pl->supported);
-		__set_bit(s->bit, pl->link_config.lp_advertising);
+	if (c) {
+		linkmode_or(pl->supported, pl->supported, match);
+		linkmode_or(pl->link_config.lp_advertising,
+			    pl->link_config.lp_advertising, match);
 	} else {
 		phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n",
 			     pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
@@ -1879,21 +1898,20 @@ static int phylink_register_sfp(struct phylink *pl,
 int phylink_set_fixed_link(struct phylink *pl,
 			   const struct phylink_link_state *state)
 {
-	const struct phy_setting *s;
+	const struct link_capabilities *c;
 	unsigned long *adv;
 
 	if (pl->cfg_link_an_mode != MLO_AN_PHY || !state ||
 	    !test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state))
 		return -EINVAL;
 
-	s = phy_lookup_setting(state->speed, state->duplex,
-			       pl->supported, true);
-	if (!s)
+	c = phy_caps_lookup(state->speed, state->duplex,
+			    pl->supported, true);
+	if (!c)
 		return -EINVAL;
 
 	adv = pl->link_config.advertising;
-	linkmode_zero(adv);
-	linkmode_set_bit(s->bit, adv);
+	linkmode_and(adv, pl->supported, c->linkmodes);
 	linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, adv);
 
 	pl->link_config.speed = state->speed;