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Sender: Larry Finger <larry.finger@gmail.com>
Subject: Re: rtw88 / rtl_8821ce: rfe 2 is not supported
To:     Kalle Valo <kvalo@codeaurora.org>,
        David Rubio <david.alejandro.rubio@gmail.com>
Cc:     Andy Huang <tehuang@realtek.com>,
        Brian Norris <briannorris@chromium.org>,
        linux-wireless <linux-wireless@vger.kernel.org>,
        Yan-Hsuan Chuang <tony0620emma@gmail.com>,
        Kai-Heng Feng <kai.heng.feng@canonical.com>
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From:   Larry Finger <Larry.Finger@lwfinger.net>
Message-ID: <87bc4553-7f17-0c23-50c8-2b413de9f7b8@lwfinger.net>
Date:   Mon, 19 Oct 2020 12:10:50 -0500
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On 10/18/20 4:11 AM, Kalle Valo wrote:
> David Rubio <david.alejandro.rubio@gmail.com> writes:
> 
>>> https://lore.kernel.org/linux-wireless/c0c336d806584361992d4b52665fbb82@realtek.com/
>>
>> I tested that patch. Works fine for me for wifi, but I can't test BT
>> to be sure it works 100%. Most people will be fine with just wifi
>> though, I guess, considering the objections were mostly about BT (I
>> understood -from the objection- that connecting to a AP when having a
>> BT device paired breaks?)
> 
> If the patch helps people to get wifi working we should take it, BT coex
> issues can be fixed in followup patches. IIRC there has been multiple
> reports about this so I'm leaning towards taking the patch to v5.11.
> 
> I changed the patch to New state and my plan is to take it to
> wireless-drivers-next once the tree opens:
> 
> https://patchwork.kernel.org/project/linux-wireless/patch/20200805084559.30092-1-kai.heng.feng@canonical.com/

Kalle,

I had generated and applied that trivial patch to my GitHub repo with the rtw88 
drivers a couple of months ago. Yes, it does get the user past the 
initialization check; however, wifi performance is abysmal according the the 
users of the repo. It seems that the antenna selection of rfe 2 models affects 
wifi as well as BT. Applying this patch will get wifi running; however, the 
users will need to be within 1 m of the AP for it to work! I do not have an 
RTL8821CE chip, thus I have not tested myself.

Larry