On 02/12/2017 11:06 PM, Johannes Berg wrote:
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
I don't have that spec...maybe you could post a patch that adds that flag
and/or other fields to the appropriate header files? I can attempt to
add support to ath10k after that...
Thanks,
Ben
--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
