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Message-ID: <5968fa14-e894-7592-c2a4-d3aeaa14174d@arinc9.com>
Date:   Wed, 1 Feb 2023 20:57:58 +0300
From:   Arınç ÜNAL <arinc.unal@...nc9.com>
To:     Paolo Abeni <pabeni@...hat.com>, Felix Fietkau <nbd@....name>,
        John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        erkin.bozoglu@...ont.com,
        Frank Wunderlich <frank-w@...lic-files.de>
Subject: Re: [PATCH net] net: ethernet: mtk_eth_soc: disable hardware DSA
 untagging for second MAC

On 31.01.2023 16:00, Paolo Abeni wrote:
> On Sat, 2023-01-28 at 12:42 +0300, arinc9.unal@...il.com wrote:
>> From: Arınç ÜNAL <arinc.unal@...nc9.com>
>>
>> According to my tests on MT7621AT and MT7623NI SoCs, hardware DSA untagging
>> won't work on the second MAC. Therefore, disable this feature when the
>> second MAC of the MT7621 and MT7623 SoCs is being used.
>>
>> Fixes: 2d7605a72906 ("net: ethernet: mtk_eth_soc: enable hardware DSA untagging")
>> Link: https://lore.kernel.org/netdev/6249fc14-b38a-c770-36b4-5af6d41c21d3@arinc9.com/
>> Tested-by: Arınç ÜNAL <arinc.unal@...nc9.com>
>> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
>> ---
>>
>> Final send which should end up on the list. I tested this with Felix's
>> upcoming patch series. This fix is still needed on top of it.
>>
>> https://lore.kernel.org/netdev/20221230073145.53386-1-nbd@nbd.name/
>>
>> The MTK_GMAC1_TRGMII capability is only on the MT7621 and MT7623 SoCs which
>> I see this problem on. I'm new to coding so I took an educated guess from
>> the use of MTK_NETSYS_V2 to disable this feature altogether for MT7986 SoC.
> 
> Keeping this one a little more on pw. It would be great is someone else
> could validate the above on the relevant H/W.

CC'ing Frank. Frank, could you test this on your Bananapi BPI-R2?

Arınç

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