linux-kernel - Re: [alsa-devel] [PATCH v3 4/5] ASoC: tda998x: adjust the audio hw parameters from EDID

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Message-ID: <20140205111814.GF22609@sirena.org.uk>
Date:	Wed, 5 Feb 2014 11:18:14 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Jean-Francois Moine <moinejf@...e.fr>, alsa-devel@...a-project.org,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Rob Clark <robdclark@...il.com>,
	Dave Airlie <airlied@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [alsa-devel] [PATCH v3 4/5] ASoC: tda998x: adjust the audio hw
 parameters from EDID

On Wed, Feb 05, 2014 at 10:19:22AM +0100, Lars-Peter Clausen wrote:
> On 02/05/2014 10:11 AM, Jean-Francois Moine wrote:

> >So, in the CODEC, I don't see how I could update the parameters
> >dictated by the EDID otherwise in changing the DAI driver parameters.

> The startup function is the right place. But instead of modifying
> the DAI use snd_pcm_hw_constraint_mask64(),
> snd_pcm_hw_constraint_list(), etc. to setup the additional
> constraints that come from the EDID.

Right.

> Bonus points for making this a generic helper function that takes a
> runtime and a EDID and then applies the EDID constraints on the
> runtime.

...as previously requested.  I know there was some discusion of broader
moves to factor this stuff out but it'd still be good to keep it
separated out even prior to a final non-EDID based solution so it's
easier to refactor.

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