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

[Paolo Abeni]

On Sat, 2023-01-28 at 12:42 +0300, arinc9.unal@xxxxxxxxx wrote:
> From: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
> 
> 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@xxxxxxxxxx/
> Tested-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
> Signed-off-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
> ---
> 
> 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@xxxxxxxx/
> 
> 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.

Thanks,

Paolo