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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Mon, 15 Nov 2021 11:44:49 -0800
Message-ID: <CABBYNZJRm8Ej7FfW7bnA8ZdZFmHbsOnVfXavM0hFdSFd2ib1Gg@mail.gmail.com>
Subject: Re: [PATCH v1 1/5] avdtp: Add a flag in struct avdtp to control a2dp offload
To:     Kiran K <kiran.k@intel.com>
Cc:     "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>,
        "Srivatsa, Ravishankar" <ravishankar.srivatsa@intel.com>,
        Chethan T N <chethan.tumkur.narayan@intel.com>,
        Luiz Augusto Von Dentz <luiz.von.dentz@intel.com>
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Hi Kiran,

On Mon, Nov 15, 2021 at 11:42 AM Luiz Augusto von Dentz
<luiz.dentz@gmail.com> wrote:
>
> Hi Kiran,
>
> On Mon, Nov 15, 2021 at 1:36 AM Kiran K <kiran.k@intel.com> wrote:
> >
> > Define a flag in struct avdtp and set it based on
> > the definition of env variable USE_OFFLOAD
> > ---
> >  profiles/audio/avdtp.c | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> >
> > diff --git a/profiles/audio/avdtp.c b/profiles/audio/avdtp.c
> > index d3dfbf96dda3..b6feac0ba4d5 100644
> > --- a/profiles/audio/avdtp.c
> > +++ b/profiles/audio/avdtp.c
> > @@ -409,6 +409,9 @@ struct avdtp {
> >
> >         /* Attempt stream setup instead of disconnecting */
> >         gboolean stream_setup;
> > +
> > +       /* use offload for transport */
> > +       gboolean use_offload;
> >  };
> >
> >  static GSList *state_callbacks = NULL;
> > @@ -2425,6 +2428,7 @@ struct avdtp *avdtp_new(GIOChannel *chan, struct btd_device *device,
> >                                                         struct queue *lseps)
> >  {
> >         struct avdtp *session;
> > +       char *use_offload;
> >
> >         session = g_new0(struct avdtp, 1);
> >
> > @@ -2436,6 +2440,10 @@ struct avdtp *avdtp_new(GIOChannel *chan, struct btd_device *device,
> >
> >         session->version = get_version(session);
> >
> > +       use_offload = getenv("USE_OFFLOAD");
> > +       if (use_offload && !strncmp(use_offload, "1", 1))
> > +               session->use_offload = TRUE;
> > +
>
> We already have a configuration for experimental flags:
>
> https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/src/main.conf#n118

Correction, we may need to introduce yet another experimental UUID
given the UUID above is just about codec offload not MSFT A2DP offload
which may require a completely different set of commands.

> So you just have to check if experimental is enabled, or the offload
> UUID, in adapter.c, also perhaps we should have something like
> btd_adapter_experimental_is_enabled(adapter, uuid) so it would take
> care of doing all the checking if that had been enabled in the kernel
> or not.
>
> >         if (!chan)
> >                 return session;
> >
> > --
> > 2.17.1
> >
>
>
> --
> Luiz Augusto von Dentz


-- 
Luiz Augusto von Dentz