linux-kernel - Re: [PATCH 1/2] ASoC: rt5677: Add ACPI device probing

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Message-ID: <20141125172120.GI7712@sirena.org.uk>
Date:	Tue, 25 Nov 2014 17:21:20 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Darren Hart <dvhart@...ux.intel.com>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Ben Zhang <benzh@...omium.org>,
	alsa-devel <alsa-devel@...a-project.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Bard Liao <bardliao@...ltek.com>,
	Oder Chiou <oder_chiou@...ltek.com>,
	Anatol Pomozov <anatol@...gle.com>,
	Dylan Reid <dgreid@...omium.org>, flove@...ltek.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: [PATCH 1/2] ASoC: rt5677: Add ACPI device probing

On Tue, Nov 25, 2014 at 08:00:12AM -0800, Darren Hart wrote:
> On 11/25/14 04:11, Grant Likely wrote:

> > Also, since this patch is targeted at v3.19 or later, the
> > device-properties API should be used. Don't create something custom.

> Right. The ACPI/UEFI forum is managing the creation of new DSD bindings
> and ensuring they are documented online. I believe this is the... 3rd so
> far? So we're still optimizing the process. But yes, please, send the
> schema itself for review and let's get this documented and migrated over
> to _DSD.

To be clear the main reason I'm querying this is that it doesn't appear
to be a _DSD based binding at all (as far as I understand it, the API
it's using is from before the dawn of time or at least the dawn of git).

Given the design of _DSD is to share with DT and we already have device
tree bindings for the device we should be using, it's not clear to me if
we want to grind them all through UEFI and I suspect they'd be unhappy
if we tried but pretty much all audio CODECs are good candidates for use
with ACPI given the new hardware designs Intel have so if we are doing
it I ought to be bouncing everyone to UEFI forum.

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