linux-kernel - Re: [PATCH v2] wifi: ath10k: add channel 177 for 5 GHz band

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Message-ID: <87ed4dr5pj.fsf@kernel.org>
Date: Fri, 18 Oct 2024 14:49:44 +0300
From: Kalle Valo <kvalo@...nel.org>
To: Paweł Owoc <frut3k7@...il.com>
Cc: Jeff Johnson <quic_jjohnson@...cinc.com>,  Jeff Johnson
 <jjohnson@...nel.org>,  linux-wireless@...r.kernel.org,
  ath10k@...ts.infradead.org,  linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] wifi: ath10k: add channel 177 for 5 GHz band

Paweł Owoc <frut3k7@...il.com> writes:

> On Fri, Oct 11, 2024 at 6:51 PM Jeff Johnson <quic_jjohnson@...cinc.com> wrote:
>>
>> On 10/8/2024 11:49 PM, Paweł Owoc wrote:> Add support for channel 177 (5885
>> MHz ) for the 5 GHz band.
>> >
>> > Tested-on: qca988x hw2.0 firmware ver 10.2.4-1.0-00047
>>
>> Can you elaborate on what was tested in your commit text? And more
>> importantly, what is the impact on existing devices, especially given that
>> existing devices would not have calibration data for this channel in the board
>> files? Does the QCA988x board file even have calibration data for this channel?
>>
> In the case of ath10k we use an external regulatory database.
> For the country "US" channels 169, 173 and 177 are marked as NO-IR and
> we cannot run AP on them.
> Even if channels are not disabled in the board files:
>             * 5845.0 MHz [169] (27.0 dBm) (no IR)
>             * 5865.0 MHz [173] (27.0 dBm) (no IR)
>             * 5885.0 MHz [177] (27.0 dBm) (no IR)
>
> I only tested the use as a client on channel 177:
> root@...nWrt:~# iwinfo phy1 scan
> Cell 01 - Address: XX:XX:XX:XX:XX:XX
>           ESSID: "ch177"
>           Mode: Master  Frequency: 5.885 GHz  Band: 5 GHz  Channel: 177
>           Signal: -43 dBm  Quality: 67/70
>           Encryption: mixed WPA2/WPA3 PSK/SAE (CCMP)
>           HT Operation:
>                     Primary Channel: 177
>                     Secondary Channel Offset: no secondary
>                     Channel Width: 20 MHz

I wonder how this works with QCA6174, unfortunately I'm not able to test
that.

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