Re: RE : [PATCH v2 2/2] ath10k: support get/set antenna configurations.

[Ben Greear <greearb@candelatech.com>]

On 05/12/2014 05:49 PM, Avery Pennarun wrote:
> On Mon, May 12, 2014 at 12:17 PM, Ben Greear <greearb@candelatech.com> wrote:
>> My patch was against my own tree which is a mix of 3.14 and an older version of git://github.com/kvalo/ath.git
>>
>> I do not have time right now to re-do the patch, but next time I get some time I will
>> fix the patch to apply to ath.git.  If someone else wants to do it first, I will not
>> complain :)
>
> I've tested it and will upload a re-spun version against a more resent
> ath-next shortly.
>
> Using firmware 10.1.467.2-1, I tested it as follows:
> - disconnected the second antenna
> - iw phy phy1 set antenna {all, 1, 2, 4, 6, 3, 5, 7}
> - Measure iperf performance and RSSI from my (2x2) macbook.
>
> Expected:
> - lower RSSI when using fewer antennas
> - very poor signal when using only the disconnected antenna
> - slower speeds when using fewer antennas
>
> Actual:
> - my AP did not successfully send out any beacons with antenna modes 2, 4, or 6.
> - RSSI was roughly 6dB less with 1 than with 5 or 7
> - seemed to degrade to 1 spatial stream as expected in modes 1 and 3
> - 2 spatial streams and good RSSI as expected in modes 5 and 7
>
> So there seems to be a problem when the first antenna is not enabled.
> Firmware bug perhaps?

I seem to recall that you can only use 1, 3, or 7 in ath9k, probably ath10k
has same constraints.

Thanks,
Ben

>
> Thanks,
>
> Avery
>

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

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