[PATCH v3] ath10k: support get/set antenna configurations.

[Yeoh Chun-Yeow]

Here is the screenshot of my wireshark capture. I am seeing 3 spatial
streams instead of 1 after setting the antennas.

---
Chun-Yeow

On Wed, May 14, 2014 at 3:18 PM, Avery Pennarun <apenwarr at gmail.com> wrote:
> On Wed, May 14, 2014 at 2:25 AM, Yeoh Chun-Yeow <yeohchunyeow at gmail.com> wrote:
>> Here is from the fw_stats:
>>
>>              ath10k PEER stats (1)
>>              =================
>>
>>               Peer MAC address 04:f0:21:0c:a5:1c
>>                      Peer RSSI 43
>>                   Peer TX rate 877500
>>                   Peer RX rate 877500
>>
>> TCP throughput is roughly around 151Mbps.
>
> In my tests it's easy to achieve >151 Mbps with a 40 MHz channel and
> 2x2.  So if you're using an 80 MHz channel (twice the speed) and only
> one antenna (half the speed) you could still get 151 Mbps pretty
> easily.
>
> I wouldn't be surprised if your speed is being limited by something
> else, maybe the host CPU or a slow interconnect on the station or AP
> (USB perhaps?), so it doesn't look "worse" with only one antenna
> because it should be at least twice as good when operating normally.
>
> If you use wireshark or tcpdump you should be able to check the MCS
> level of the packets and see that it's lower with fewer antennas.
>
> Have fun,
>
> Avery
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