Re: VHT 160Mhz and nss related config.

On 02/10/2017 03:23 PM, Adrian Chadd wrote:

Is it limited on both tx and rx or only one?

Both, as I understand it.  I think maybe we could use the max-tx-rate and max-rx-rate
fields in the vht mcs info field to give user-space a clue.

Thanks,
Ben

Adrian

On Feb 10, 2017 2:58 PM, "Ben Greear" <greearb@candelatech.com <mailto:greearb@candelatech.com>> 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.

    Any ideas?

    Thanks,
    Ben

    --
    Ben Greear <greearb@candelatech.com <mailto:greearb@candelatech.com>>
    Candela Technologies Inc  http://www.candelatech.com

-- 
Ben Greear [off-list ref]
Candela Technologies Inc  http://www.candelatech.com