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From:   Yaroslav Isakov <yaroslav.isakov@gmail.com>
Date:   Wed, 6 Mar 2019 20:55:10 +0100
Message-ID: <CADS+iDWWxbYkQ=+J8LvOYPZOyuDDxKxf=wxSm1QY_YvGyPD5LQ@mail.gmail.com>
Subject: Re: Strange SCO problem
To:     Sathish Narasimman <nsathish41@gmail.com>
Cc:     linux-bluetooth@vger.kernel.org,
        Sathish Narasimman <sathish.narasimman@intel.com>
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=D1=81=D1=80, 6 =D0=BC=D0=B0=D1=80. 2019 =D0=B3. =D0=B2 09:28, Sathish Nara=
simman <nsathish41@gmail.com>:
>
> Hi,
>
Hello, Sathish
> Intel adapter 9260 and 9265(with the latest Firmware - from
> Bluetooth-next) supports USB ALT 6 settings and was verified.
>
I have only 8260 and 8265. How I can check if they supports ALT 6
setting? I've checked via lsusb
lsusb -d 8087:0a2b -v | grep bAlt
      bAlternateSetting       0
      bAlternateSetting       0
      bAlternateSetting       1
      bAlternateSetting       2
      bAlternateSetting       3
      bAlternateSetting       4
      bAlternateSetting       5
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
> Along with backend ofono
> https://patchwork.freedesktop.org/patch/245272/
>
I've based my patches for native backend on your work. Unfortunately,
I cannot use ofono, as it needs phonesim which is not working on my
system (and is abandoned long ago...)

> https://www.spinics.net/lists/linux-bluetooth/msg76982.html
>
> Regards,
> Sathish N
>
>
> On Wed, Mar 6, 2019 at 5:15 AM Yaroslav Isakov
> <yaroslav.isakov@gmail.com> wrote:
> >
> > Hello! I'm currently trying to modify pulseaudio to be able to use HFP
> > profile with mSBC codec on native backend, but found that, while
> > working de-jure, real sound is completely ruined, so I can barely hear
> > what is sent over SCO link. I've tried two different Intel adapters
> > (included in 8260 and 8265 chipset) and KillerWifi (ath10k driver), on
> > two different PCs with two different headsets, results are mostly the
> > same, the only difference is that on ath10k words are more or less
> > distinguishable.
> >
> > I've even tested with pulse just for profile setup, and SCO is sent
> > via modified scotest from bluez, which sends some test sound, manually
> > encoded via sbcenc (with added h2, of course). I've tried also msbc
> > branch from bluez-alsa, same result.
> >
> > I'm sure that every time socket is connected with setsockopt(fd,
> > SOL_BLUETOOTH, BT_VOICE, &voice, sizeof(voice));
> >
> > I've also tried with this patch
> > https://www.spinics.net/lists/linux-bluetooth/msg76982.html, with no
> > luck.
> >
> > Any ideas?