Dynamic channel Access

[Michal Kazior]

On 25 March 2015 at 16:34, Jose Antonio Delgado Alfonso
<jose.delgado at aoifes.com> wrote:
> Hi all,
>
> I would like to ask Qualcomm's collaborators about this topic.
>
> We are trying to certify a AP product which uses QCA988x radio module.
> We are using the ath10k driver (kernel v3.17.8) and firmware from Ben
> Greear. We are trying to pass the Dynamic Channel test, which consists
> in setting the radio at 80MHz and, at the same time, setting other
> signal in the secondary channel. So far, the radio module does not
> reduce the bandwidth and remains transmitting at 80MHz.
>
> Please, Does someone know if Dynamic Channel Access is really supported
> by ath10k driver in newest kernel versions?

You haven't really defined what kind of "other signal" you set up.
ath10k sets/enables dynamic_bw wmi parameter in ath10k_start(). From
what I know dynamic_bw does enable fw/hw to downgrade traffic from
80MHz to 40MHz in case there's other 802.11 traffic on the subband
happening at least on 10.1.467 - not sure about non-802.11 traffic. I
suppose newer firmware revisions do that too. I'm not sure about
999.999.0.636 though.


Michał