linux-kernel - Re: [alsa-devel] [PATCH v3] ASOC: dapm: add code to configure dai link parameters

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Message-ID: <20140811121912.GY17528@sirena.org.uk>
Date:	Mon, 11 Aug 2014 13:19:12 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Vinod Koul <vinod.koul@...el.com>
Cc:	Nikesh Oswal <nikesh@...nsource.wolfsonmicro.com>,
	lgirdwood@...il.com, tiwai@...e.de, alsa-devel@...a-project.org,
	patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH v3] ASOC: dapm: add code to configure dai
 link parameters

On Mon, Aug 11, 2014 at 11:54:29AM +0530, Vinod Koul wrote:
> On Thu, Aug 07, 2014 at 06:13:24PM +0100, Mark Brown wrote:
> > On Thu, Aug 07, 2014 at 07:46:05PM +0530, Vinod Koul wrote:

> > > I was thinking about this as well a while back, wont it make sense to let
> > > machine driver expose meaningful controls for this. Just like we have fixup
> > > for back-ends, we can add fixups for codec-codec links and let machine tell
> > > you the parameters to configure.

> > This is supposed to be pretty much the same thing (not looked at the
> > patch yet) - the machine driver passes in a list of possible settings
> > and then a control gets generated allowing the user to pick one.

> Yes but this is bit different from the current way of using fixups for BEs.
> So it would be bit incosistent. For pcms it would be only fixups and for
> loops it would be machine controls

That doesn't mean it's the best way to go in the end though - long term
I expect to see us move away from that to something more data driven and
DAPM integrated.  Requiring drivers to open code things rather than
factoring out the code doesn't seem like the right way forwards.

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