linux-kernel - Re: question on A2DP sink suspend/resume

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Date:	Thu, 25 Jun 2009 05:45:11 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	lan zhu <zhu.lan.cn@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: question on A2DP sink suspend/resume

Hi Zhu,

> If we want to create SCO link when A2DP is in streaming state, we
> shall suspend A2DP first and then establish SCO link. Conversely, we
> shall resume A2DP link when we drop SCO link. The entire description
> can be found in the Simultaneous use of HFP, A2DP, and AVRCP Profiles
> Whitepaper on bluetooth org web site.
> (https://www.bluetooth.org/Technical/Specifications/whitepapers.htm).
> 
> My question is,  I found there is no such sink_suspend or sink_resume
> method in D-BUS API while these functions are all implemented in Bluez
> audio module. I would like to know why don't put them to D-BUS API?
> If we need to call these functions we have to expand the D-BUS API.
> 
> One more question is, is there a formal way to test SCO/A2DP
> simultaneous case? we can't find a proper headset to test it because
> those headsets are all well implemented with the simultaneous logic,
> so there is no way to enter ourselves' code that handle this logic.
> Can we test it by configurating some test tool such as PTS?

seriously, wrong mailing list. Especially since A2DP is implemented
fully in userspace ;)

Post such questions to linux-bluetooth@...r.kernel.org please.

Regards

Marcel


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