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37 lines
1.4 KiB
Diff
37 lines
1.4 KiB
Diff
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From 9e1a0d2006bc108b239b5bc00b42c2a8cc651217 Mon Sep 17 00:00:00 2001
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From: Daniel Golle <daniel@makrotopia.org>
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Date: Tue, 8 Oct 2024 23:58:41 +0100
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Subject: [PATCH] net: phy: populate host_interfaces when attaching PHY
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Use bitmask of interfaces supported by the MAC for the PHY to choose
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from if the declared interface mode is among those using a single pair
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of SerDes lanes.
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This will allow 2500Base-T PHYs to switch to SGMII on most hosts, which
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results in half-duplex being supported in case the MAC supports them.
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Without this change, 2500Base-T PHYs will always operate in 2500Base-X
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mode with rate-matching, which is not only wasteful in terms of energy
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consumption, but also limits the supported interface modes to
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full-duplex only.
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Signed-off-by: Daniel Golle <daniel@makrotopia.org>
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---
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drivers/net/phy/phylink.c | 7 +++++++
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1 file changed, 7 insertions(+)
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--- a/drivers/net/phy/phylink.c
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+++ b/drivers/net/phy/phylink.c
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@@ -2044,6 +2044,13 @@ int phylink_fwnode_phy_connect(struct ph
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pl->link_config.interface = pl->link_interface;
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}
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+ /* Assume SerDes interface modes share the same lanes and allow
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+ * the PHY to switch between them
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+ */
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+ if (test_bit(pl->link_interface, phylink_sfp_interfaces))
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+ phy_interface_and(phy_dev->host_interfaces, phylink_sfp_interfaces,
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+ pl->config->supported_interfaces);
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+
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ret = phy_attach_direct(pl->netdev, phy_dev, flags,
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pl->link_interface);
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phy_device_free(phy_dev);
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