[PATCH net] net: ethernet: mtk_eth_soc: disable hardware DSA untagging for second MAC

[Arınç ÜNAL]

On 31.01.2023 16:00, Paolo Abeni wrote:
> On Sat, 2023-01-28 at 12:42 +0300, arinc9.unal at gmail.com wrote:
>> From: Arınç ÜNAL <arinc.unal at arinc9.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 at arinc9.com>
>> Signed-off-by: Arınç ÜNAL <arinc.unal at arinc9.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