From 1c86828dff88e28b8ade6bddeee0163a023faf91 Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Tue, 3 Dec 2024 15:31:12 +0000
Subject: [PATCH 06/13] net: phy: marvell: implement phy_inband_caps() method

Provide an implementation for phy_inband_caps() for Marvell PHYs used
on SFP modules, so that phylink knows the PHYs capabilities.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1tIUro-006IUC-Rq@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/phy/marvell.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -716,6 +716,20 @@ static int marvell_config_aneg_fiber(str
 	return genphy_check_and_restart_aneg(phydev, changed);
 }
 
+static unsigned int m88e1111_inband_caps(struct phy_device *phydev,
+					 phy_interface_t interface)
+{
+	/* In 1000base-X and SGMII modes, the inband mode can be changed
+	 * through the Fibre page BMCR ANENABLE bit.
+	 */
+	if (interface == PHY_INTERFACE_MODE_1000BASEX ||
+	    interface == PHY_INTERFACE_MODE_SGMII)
+		return LINK_INBAND_DISABLE | LINK_INBAND_ENABLE |
+		       LINK_INBAND_BYPASS;
+
+	return 0;
+}
+
 static int m88e1111_config_aneg(struct phy_device *phydev)
 {
 	int extsr = phy_read(phydev, MII_M1111_PHY_EXT_SR);
@@ -3704,6 +3718,7 @@ static struct phy_driver marvell_drivers
 		.name = "Marvell 88E1112",
 		/* PHY_GBIT_FEATURES */
 		.probe = marvell_probe,
+		.inband_caps = m88e1111_inband_caps,
 		.config_init = m88e1112_config_init,
 		.config_aneg = marvell_config_aneg,
 		.config_intr = marvell_config_intr,
@@ -3725,6 +3740,7 @@ static struct phy_driver marvell_drivers
 		/* PHY_GBIT_FEATURES */
 		.flags = PHY_POLL_CABLE_TEST,
 		.probe = marvell_probe,
+		.inband_caps = m88e1111_inband_caps,
 		.config_init = m88e1111gbe_config_init,
 		.config_aneg = m88e1111_config_aneg,
 		.read_status = marvell_read_status,
@@ -3748,6 +3764,7 @@ static struct phy_driver marvell_drivers
 		.name = "Marvell 88E1111 (Finisar)",
 		/* PHY_GBIT_FEATURES */
 		.probe = marvell_probe,
+		.inband_caps = m88e1111_inband_caps,
 		.config_init = m88e1111gbe_config_init,
 		.config_aneg = m88e1111_config_aneg,
 		.read_status = marvell_read_status,
