On Fri, 2017-02-10 at 14:58 -0800, Ben Greear wrote: > So, it appears that the ath10k QCA9984 4x4 160Mhz chip can do 4x4 > MIMO at VHT80, but > it can do only 2x2 MIMO at VHT160/80+80. > > When configuring a peer, we need to tell the firmware the number of > spatial streams > of the peer at VHT160 and at VHT80 and lower. They are not the same > value. > > I cannot think of any standard way to get this information based on > VHT capabilities and such. Currently, one could just assume VHT160 > NSS is 1/2 of the VHT80 NSS, but that is unlikely to be true for all > vendors. This was recently added to the VHT capabilities in the spec, see Table 9-250 in 802.11-2016. johannes
