Re: [PATCH rtw-next v2 6/7] wifi: rtw88: 88xxa: adapt channel sensing to receiver gain

["Luka Gejak" <luka.gejak@linux.dev>]

November 6, 2026 at 8:46 PM, "Bitterblue Smith" <rtl8821cerfe2@gmail.com> wrote:

> 
> On 06/11/2026 19:34, Luka Gejak wrote:
> 
>> 

[ ... ]

>>  
>>  Bitterblue, did you turn EDCCA off through the edcca_enable debugfs file?
>> 
> Yes, that's what I did.
> 

Thanks for the answer. So I think EDCCA itself is fine with this patch,
and it is the lower thresholds of the adaptivity mode that keep the
firmware from leaving LPS.

To me this looks a lot like b0435910e47d ("wifi: rtw88: 8822b: Relax
ETSI EDCCA threshold on 2.4 GHz"). There an RTL8812BU running as a 2.4
GHz AP wasn't seen in scans and failed to get TX reports under the
ETSI threshold, mostly because of energy from the adapter's own USB 3
link. The fix was to use the normal threshold on 2.4 GHz under ETSI,
capped for EN 300 328. Your network is on channel 13, so that would fit.

The 8812au vendor drivers don't use the adaptivity thresholds by default
either. Both v5.6.4.2 and 8812au-20210820 build with

        CONFIG_RTW_ADAPTIVITY_EN = disable

and as far as I can see phydm_adaptivity() then stays on the normal
(mode2) thresholds.

Jie Feng, maybe doing the same as 8822b would work for v3, the normal
thresholds on 2.4 GHz under ETSI and the adaptivity ones for 5 GHz and
JP. Bitterblue, is the adapter on a USB 3 port, and do you see the LPS
failures on 5 GHz as well?

Best regards,
Luka Gejak