+ linux-wireless david Atkins <david@xxxxxxxxxxxxxx> writes: > ... >> >>> 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 Did you test Intel BE200 with the Windows driver? Johannes mentioned that ieee80211_verify_sta_eht_mcs_support() in mac80211 checks this so I would assume that iwlwifi also behaves like ath12k. -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches https://docs.kernel.org/process/submitting-patches.html
