linux-kernel - Re: [PATCH 6/7] ASoC: Samsung: neo1973_gta02: Fix bluetooth DAI registration

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Date:	Mon, 7 Feb 2011 18:17:02 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Liam Girdwood <lrg@...mlogic.co.uk>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] ASoC: Samsung: neo1973_gta02: Fix bluetooth DAI
 registration

Once more I've reflowed your text.  *Please* fix this, it's really
hurting the legibility of your mail.

On Mon, Feb 07, 2011 at 07:09:30PM +0100, Lars-Peter Clausen wrote:
> On 02/07/2011 06:49 PM, Mark Brown wrote:

> > The card is only registering one DAI, all the other DAIs are attached to
> > other devices in the system.

> Isn't the card the combination of these other devices?

Well, yes...

> > The bluetooth chip is an actual device which I can point to on the
> > board and schematic, having a struct device to represent a device that's
> > actually present doesn't seem like a great leap.

> Well, there is an actual device representing the bt device, but since
> this is the standard bt usb device I have no idea how we would get an
> reference to it from within the sound board driver.

If you've got a real device and a driver binding to it then you can make
the driver for that device register the DAI from its probe function, no
need for the machine driver to get involved.

> > It does mean it's named after the board.

> Ok. Could you please explain how snd_soc_register_machine would work
> and how it would effekt the naming of the dai? I couldn't find any
> reference to it.

Sorry, snd_soc_register_card().  This skips the soc-audio device and
allows the card to be registered from a regular device, meaning you can
do things like pass platform data in sanely and handle multiple boards
in a kernel without machine_is_() faff.
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