From: Leo Yan <leoy@marvell.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>
Subject: Re: Questions for dummy codec driver
Date: Thu, 22 Sep 2011 09:42:14 +0800 [thread overview]
Message-ID: <4E7A9276.803@marvell.com> (raw)
In-Reply-To: <20110921125607.GC25620@sirena.org.uk>
On 09/21/2011 08:56 PM, Mark Brown wrote:
> On Wed, Sep 21, 2011 at 10:23:18AM +0800, Leo Yan wrote:
>
>> I have a question for the dummy codec.
>
> Don't start new threads by randomly replying to unrelated mails.
>
Sorry for that :-), the alsa-devel is the unrelated mailing list, right?
if so, i will note for that later.
>> As you know, sometimes maybe we only need set the timing from the
>> processor, and codec just only need tx/rx data; So there do not need
>> the codec driver.
>
> Even a dumb CODEC will have some constraints on things like the sample
> rates it can support which need to be conveyed to the framework and
> ideally the audio routing out of the CODEC should be visible for
> integration with any external output drivers or similar.
>
Get it.
On our platform, there have some devices (like hdmi/bt) do not need
config from the CODEC driver, they have their own s/w stack and
interface to configure; for the audio driver, just need to set the
I2S/PCM timing for them. So if there have a common dummy codec driver,
then it can meet our requirement well. Otherwise, there will have some
duplicate codes for these dummy codecs.
>> After browser the code, there have NO such a dummy codec driver; and
>> for soc-core, there have not such flags to support this situation.
>> Only what i get is sound/soc/codecs/spdif_transciever.c, but it's
>> specific for TI's DaVinci platform.
>
> Not at all, what makes you believe that it is platform specific?
next prev parent reply other threads:[~2011-09-22 1:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-20 7:09 [PATCH] ASoC: fsl: Fix error handling if platform_device_add fails Axel Lin
2011-09-20 11:21 ` Liam Girdwood
2011-09-20 11:21 ` Liam Girdwood
2011-09-20 12:04 ` Mark Brown
2011-09-20 12:04 ` Mark Brown
2011-09-20 16:00 ` Timur Tabi
2011-09-20 16:00 ` Timur Tabi
2011-09-21 2:23 ` Questions for dummy codec driver Leo Yan
2011-09-21 12:56 ` Mark Brown
2011-09-21 12:56 ` Mark Brown
2011-09-22 1:42 ` Leo Yan [this message]
2011-09-26 21:47 ` Mark Brown
2011-09-26 21:47 ` Mark Brown
2011-09-27 2:08 ` [PATCH] ASoC: fsl: Fix error handling if platform_device_add fails Tabi Timur-B04825
2011-09-27 2:21 ` Axel Lin
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