linux-kernel - [PATCH net] net: mvpp2: Enable autoneg bypass for 1000BaseX/2500BaseX ports

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Message-Id: <20200528121121.125189-1-tbogendoerfer@suse.de>
Date:   Thu, 28 May 2020 14:11:21 +0200
From:   Thomas Bogendoerfer <tbogendoerfer@...e.de>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <rmk+kernel@...linux.org.uk>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net] net: mvpp2: Enable autoneg bypass for 1000BaseX/2500BaseX ports

Commit d14e078f23cc ("net: marvell: mvpp2: only reprogram what is necessary
 on mac_config") disabled auto negotiation bypass completely, which breaks
platforms enabling bypass via firmware (not the best option, but it worked).
Since 1000BaseX/2500BaseX ports neither negotiate speed nor duplex mode
we could enable auto negotiation bypass to get back information about link
state.

Fixes: d14e078f23cc ("net: marvell: mvpp2: only reprogram what is necessary on mac_config")
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 2b5dad2ec650..ddcd781052e1 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -5043,6 +5043,7 @@ static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode,
 			MVPP2_GMAC_CONFIG_GMII_SPEED |
 			MVPP2_GMAC_CONFIG_FULL_DUPLEX);
 		an |= MVPP2_GMAC_IN_BAND_AUTONEG |
+		      MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS |
 		      MVPP2_GMAC_CONFIG_GMII_SPEED |
 		      MVPP2_GMAC_CONFIG_FULL_DUPLEX;
 
-- 
2.16.4