netdev - Re: [PATCH v4 net-next 3/8] net: phy: bcm84881: move the in-band capability check where it belongs

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Date:   Tue, 29 Nov 2022 13:43:05 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Vladimir Oltean <vladimir.oltean@....com>,
        Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        UNGLinuxDriver@...rochip.com,
        bcm-kernel-feedback-list@...adcom.com,
        Madalin Bucur <madalin.bucur@....nxp.com>,
        Camelia Groza <camelia.groza@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Maxim Kochetkov <fido_max@...ox.ru>,
        Sean Anderson <sean.anderson@...o.com>,
        Antoine Tenart <atenart@...nel.org>,
        Michael Walle <michael@...le.cc>,
        Raag Jadav <raagjadav@...il.com>,
        Siddharth Vadapalli <s-vadapalli@...com>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        Colin Foster <colin.foster@...advantage.com>,
        Marek Behun <marek.behun@....cz>
Subject: Re: [PATCH v4 net-next 3/8] net: phy: bcm84881: move the in-band
 capability check where it belongs

On Tue, Nov 29, 2022 at 01:40:58PM +0000, Russell King (Oracle) wrote:
> Here's an updated patch.
> 8<===
> From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
> Subject: [PATCH] net: phy: marvell: add validate_an_inband() method
> 
> Add the validate_an_inband() method for Marvell 88E1111, the Finisar
> version of the 88E1111, and 88E1112.
> 
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

And this is what I was using on top to force a mismatch with bypass
enabled:

diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
index fbf881cd4a38..c7a0389320cd 100644
--- a/drivers/net/phy/marvell.c
+++ b/drivers/net/phy/marvell.c
@@ -683,6 +683,14 @@ static int m88e1111_validate_an_inband(struct phy_device *phydev,
 	if (extsr < 0 || bmcr < 0)
 		return PHY_AN_INBAND_UNKNOWN;
 
+	/* <<=== HACK */
+	phydev_info(phydev, "extsr: %04x fiber bmcr: %04x\n", extsr, bmcr);
+	phy_write(phydev, MII_M1111_PHY_EXT_SR, extsr |
+		  MII_M1111_HWCFG_SERIAL_AN_BYPASS);
+	genphy_soft_reset(phydev);
+	return PHY_AN_INBAND_OFF;
+	/* ===>> HACK */
+
 	/* We make no efforts to enable the ANENABLE bit when switching mode.
 	 * If this bit is clear, then we will not be using in-band signalling.
 	 */

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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