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From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date:   Thu, 12 Dec 2019 21:42:27 +0200
Message-ID: <CABBYNZKCovNDcAaMMeYZgKAAq-8oz+pcs6xmS3A_Qt-28aoEbQ@mail.gmail.com>
Subject: Re: bluez: Export SDP "Remote audio volume control" item for HSP profile
To:     =?UTF-8?Q?Pali_Roh=C3=A1r?= <pali.rohar@gmail.com>
Cc:     "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>
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Hi Pali,

On Thu, Dec 12, 2019 at 7:31 PM Pali Roh=C3=A1r <pali.rohar@gmail.com> wrot=
e:
>
> Hello!
>
> According to HSP 1.2 specification, section 4.7 Remote Audio Volume
> Control, Support for remote audio volume control is optional, so an
> implementation may support none, either, or both of the controls for
> microphone volume and speaker volume.
>
> According to HSP 1.2 specification, section 5.3 SDP Interoperability
> Requirements, bluetooth device with HSP profile announce via SDP "Remote
> audio volume control" field information if device itself supports volume
> control.
>
> But currently I did not found any way how to access "Remote audio volume
> control" SDP field in (pulseaudio) application as bluez does not export
> it.
>
> Can you please export this field? E.g. for HFP profile all optional
> features from SDP are passed to NewConnection() DBus method via
> fd_properties dictionary under Features key. Could you export that
> "Remote audio volume control" bit for HSP profile in Features key?
>
> And in same way, this needs to be handled also in RegisterProfile() DBus
> method.

Do you have a use case in mind?

--=20
Luiz Augusto von Dentz