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Date:   Mon, 4 Nov 2019 10:00:58 +0100
From:   Daniel Golle <daniel@makrotopia.org>
To:     Stanislaw Gruszka <sgruszka@redhat.com>
Cc:     Tom Psyborg <pozega.tomislav@gmail.com>,
        linux-wireless@vger.kernel.org, Roman Yeryomin <roman@advem.lv>,
        wbob <wbob@jify.de>
Subject: Re: [PATCH] rt2800: remove erroneous duplicate condition
Message-ID: <20191104090058.GA1258@makrotopia.org>
References: <20191028212244.GA2590@makrotopia.org>
 <20191029091857.GB3571@redhat.com>
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 <20191102154639.GA4589@redhat.com>
 <20191102174227.GA1250@makrotopia.org>
 <20191103144749.GA8889@redhat.com>
 <CAKR_QV+LkUU2+G7z8um7RpSbi0ANfRGe_TeoGky+U9ff=8sOZA@mail.gmail.com>
 <20191104084823.GA2306@redhat.com>
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On Mon, Nov 04, 2019 at 09:48:23AM +0100, Stanislaw Gruszka wrote:
> On Sun, Nov 03, 2019 at 04:41:11PM +0100, Tom Psyborg wrote:
> > On 03/11/2019, Stanislaw Gruszka <sgruszka@redhat.com> wrote:
> > > On Sat, Nov 02, 2019 at 06:42:27PM +0100, Daniel Golle wrote:
> > >> > This was changed by:
> > >> >
> > >> > commit c2e28ef7711ffcb083474ee5f154264c6ec1ec07
> > >> > Author: Tomislav Požega <pozega.tomislav@gmail.com>
> > >> > Date:   Thu Dec 27 15:05:25 2018 +0100
> > >> >
> > >> >     rt2x00: reduce tx power to nominal level on RT6352
> > >> >
> > >> > and I think it is correct.
> > >>
> > >> Ah, ok, that's a bit funny, because it means that this change actually
> > >> never made any difference, because the codepath wasn't executed.
> > >
> > > Yes, this was used/tested on patched rt2x00 driver that switch to this
> > > different codepath. Now it will be used by default :-)
> > >
> > > Stanislaw
> > >
> > >
> > 
> > Hi
> > 
> > For your reference: rt2x00: reduce tx power to nominal level on RT6352
> > 
> > iPA/eLNA - fixes too high power output
> > ePA/eLNA - doesn't have any effect
> > iPA/iLNA - not tested
> 
> Does someone have iPA/iLNA device so this can be tested?
> Or it is not used combination on available devices? 

iPA/iLNA the most commonly found combination in cheap devices.
iPA/eLNA is more rare, but found in some higher-quality devices.
ePA/eLNA is available mostly in markets which allow higher TX power.
ePA/iLNA haven't seen it yet, but theoretically possible.

Looking at the internal photos of Nexx WT3020, I'm very certain this
is an iPA/iLNA device -- apart from regulators, magnetics, MT7620N
itself and flash memory, another magnetics and RAM on the backside,
there are no other parts on the board. Also afaik MT7620N only supports
iLNA/iPA (due to the limited number of pins of the DRQFN package).

See:
https://apps.fcc.gov/eas/GetApplicationAttachment.html?id=2241504


Cheers


Daniel


> 
> Stanislaw
>