Janusz Dziedzic <janusz.dziedzic@xxxxxxxxx> writes: > wt., 3 wrz 2024 o 09:47 Kalle Valo <kvalo@xxxxxxxxxx> napisał(a): >> >> + 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. > > Yes, this is AP issue - hostapd fix required - advertise 0x11111 ... > In other case station < 4nss will drop to HE only. Thanks. And Johannes pointed out that you had even discussed about this before: https://lore.kernel.org/linux-wireless/CAFED-jk8pJheJEViESnE54f-K+JgRMiWoiCSa0GBt=RKaCn7sw@xxxxxxxxxxxxxx/ -- 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
