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From:   David Rubio <david.alejandro.rubio@gmail.com>
Date:   Wed, 21 Oct 2020 11:12:24 -0300
Message-ID: <CAO6ttSkPFjOnTYtfzRmKfT2cL-S7=6-R-WzNOBb7yZXW22-HEw@mail.gmail.com>
Subject: Re: rtw88 / rtl_8821ce: rfe 2 is not supported
To:     Andy Huang <tehuang@realtek.com>
Cc:     Larry Finger <Larry.Finger@lwfinger.net>,
        Kalle Valo <kvalo@codeaurora.org>,
        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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5GHz. Haven't really tried 2.4GHz.

So basically with that patch, 5GHz works ok-ish, and 2.4GHz is broken?

- Kodehawa

El mi=C3=A9., 21 oct. 2020 a las 0:41, Andy Huang (<tehuang@realtek.com>) e=
scribi=C3=B3:
>
>
> David Rubio <david.alejandro.rubio@gmail.com> writes,
> >
> > Makes sense I guess. My room is 7m^2 so can't test beyond that.
> > Small room issues, or well, not issues, I guess.
> >
> > - Kodehawa
> >
> > El lun., 19 oct. 2020 a las 14:10, Larry Finger
> > (<Larry.Finger@lwfinger.net>) escribi=C3=B3:
> > >
> > > 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=
@r
> > ealtek.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 havin=
g 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 multip=
le
> > > > 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/2020080508455=
9.30
> > 092-1-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 model=
s affects
> > > wifi as well as BT. Applying this patch will get wifi running; howeve=
r, the
> > > users will need to be within 1 m of the AP for it to work! I do not h=
ave an
> > > RTL8821CE chip, thus I have not tested myself.
> > >
> > > Larry
> > >
> >
> David,
>
> What is the band for the test, 2.4GHz or 5GHz?
> Without setting to a correct rf module for RFE type 2, you might encounte=
r some
> problems on 2.4GHz band.
> In my test, on 2.4GHz band, with the wrong setting, it could not connect =
to an AP.
>
> Tzu-En