netdev - [PATCH net-next] net: dsa: rtl8365mb: add GMII as user port mode

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Message-Id: <20211215034128.18199-1-luizluca@gmail.com>
Date:   Wed, 15 Dec 2021 00:41:28 -0300
From:   luizluca@...il.com
To:     netdev@...r.kernel.org
Cc:     alsi@...g-olufsen.dk, linus.walleij@...aro.org,
        Luiz Angelo Daros de Luca <luizluca@...il.com>,
        Arınç ÜNAL <arinc.unal@...nc9.com>
Subject: [PATCH net-next] net: dsa: rtl8365mb: add GMII as user port mode

From: Luiz Angelo Daros de Luca <luizluca@...il.com>

Recent net-next fails to initialize ports with:

 realtek-smi switch: phy mode gmii is unsupported on port 0
 realtek-smi switch lan5 (uninitialized): validation of gmii with
 support 0000000,00000000,000062ef and advertisement
 0000000,00000000,000062ef failed: -22
 realtek-smi switch lan5 (uninitialized): failed to connect to PHY:
 -EINVAL
 realtek-smi switch lan5 (uninitialized): error -22 setting up PHY
 for tree 1, switch 0, port 0

Current net branch(3dd7d40b43663f58d11ee7a3d3798813b26a48f1) is not
affected.

I also noticed the same issue before with older versions but using
a MDIO interface driver, not realtek-smi.

Tested-by: Arınç ÜNAL <arinc.unal@...nc9.com>
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@...il.com>
---
 drivers/net/dsa/rtl8365mb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/rtl8365mb.c b/drivers/net/dsa/rtl8365mb.c
index 2ac68c867636..3b729544798b 100644
--- a/drivers/net/dsa/rtl8365mb.c
+++ b/drivers/net/dsa/rtl8365mb.c
@@ -900,7 +900,8 @@ static bool rtl8365mb_phy_mode_supported(struct dsa_switch *ds, int port,
 {
 	if (dsa_is_user_port(ds, port) &&
 	    (interface == PHY_INTERFACE_MODE_NA ||
-	     interface == PHY_INTERFACE_MODE_INTERNAL))
+	     interface == PHY_INTERFACE_MODE_INTERNAL ||
+	     interface == PHY_INTERFACE_MODE_GMII))
 		/* Internal PHY */
 		return true;
 	else if (dsa_is_cpu_port(ds, port) &&
-- 
2.34.0