wcn7850 issues

[david Atkins]

...
> >>>         Ext Tag: EHT Operation (802.11be D3.0)
> >>>             Ext Tag length: 8 (Tag len: 9)
> >>>             Ext Tag Number: EHT Operation (802.11be D3.0) (106)
> >>>             EHT Operation Parameters: 0x01, EHT Operation Information
> Present
> >>>                 .... ...1 = EHT Operation Information Present: True
> >>>                 .... ..0. = Disabled Subchannel Bitmap Present: False
> >>>                 .... .0.. = EHT Default PE Duration: False
> >>>                 .... 0... = Group Addressed BU Indication Limit: False
> >>>                 ..00 .... = Group Addressed BU Indication Exponent: 0
> >>>                 00.. .... = Reserved: 0x0
> >>>             Basic EHT-MCS And Nss Set: 0x44444444
> >>>             Control: 0x02, Channel Width: 80 MHz EHT BSS bandwidth
> >>>                 .... .010 = Channel Width: 80 MHz EHT BSS bandwidth (2)
> >>>                 0000 0... = Reserved: 0x00
> >>>
> >>> Are you saying the ath12k driver does not support these features? If
> >>> not can
> >> you clarify the issue so I can raise with the AP team.
> >>>
> >> ath12k/WCN7850 supports EHT, but with NSS only 2. Here the AP
> >> requires NSS to be no less than 4, that is why EHT connection was disabled.
> >
> > Which field is requiring NSS of 4, I'm only seeing a maximum of 4, the
> Qualcomm windows driver will connect to the same AP, we had assumed that
> that ath12k would do the same.
> Basic EHT-MCS And Nss Set: 0x44444444

My understanding of the spec is that there are maximum numbers of streams though, are you saying the AP has to advertise 0x22222222 which would then prevent a 4x4 client (say an extender) from connecting with 4 streams? I note that the Qualcomm windows driver for Hamilton works with the AP and an Intel BE200 also works both of which will be in at most 2x2