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From:   Daniel Drake <drake@endlessm.com>
Date:   Wed, 3 Jul 2019 15:42:02 +0800
Message-ID: <CAD8Lp47mWH1-VsZaHr6_qmSU2EEOr9tQJ3CUhfi_JkQGgKpegA@mail.gmail.com>
Subject: Re: [PATCH] rtl8xxxu: Fix wifi low signal strength issue of RTL8723BU
To:     Jes Sorensen <jes.sorensen@gmail.com>
Cc:     Chris Chiu <chiu@endlessm.com>, Kalle Valo <kvalo@codeaurora.org>,
        David Miller <davem@davemloft.net>,
        linux-wireless <linux-wireless@vger.kernel.org>,
        netdev <netdev@vger.kernel.org>,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        Linux Upstreaming Team <linux@endlessm.com>,
        Larry Finger <Larry.Finger@lwfinger.net>
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On Tue, Jul 2, 2019 at 8:42 PM Jes Sorensen <jes.sorensen@gmail.com> wrote:
> We definitely don't want to bring over the vendor code, since it's a
> pile of spaghetti, but we probably need to get something sorted. This
> went down the drain when the bluetooth driver was added without taking
> it into account - long after this driver was merged.

Yeah, I didn't mean bring over quite so literally.. Chris is studying
it and figuring out the neatest way to reimplement the required bits.

As for the relationship with bluetooth.. actually the bug that Chris
is working on here is that the rtl8xxxu wifi signal is totally
unusable *until* the bluetooth driver is loaded.
Once the bluetooth driver is loaded, at the point of bluetooth
firmware upload, the rtl8xxxu signal magiaclly strength becomes good.
I think this is consistent with other rtl8xxxu problem reports that we
saw lying around, although they had not been diagnosed in so much
detail.
The rtl8723bu vendor driver does not suffer this problem, it works
fine with or without the bluetooth driver in place.

Daniel