linux-kernel - Re: [PATCH 3/3 v2] sound/soc/lapis: add platform driver for ML7213 IOH I2S

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Message-ID: <20111226121207.GF8722@opensource.wolfsonmicro.com>
Date:	Mon, 26 Dec 2011 12:12:08 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Tomoya MORINAGA <tomoya.rohm@...il.com>
Cc:	Liam Girdwood <lrg@...com>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>,
	Mike Frysinger <vapier@...too.org>,
	Daniel Mack <zonque@...il.com>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org, qi.wang@...el.com,
	yong.y.wang@...el.com, joel.clark@...el.com, kok.howg.ewe@...el.com
Subject: Re: [PATCH 3/3 v2] sound/soc/lapis: add platform driver for ML7213
 IOH I2S

On Mon, Dec 26, 2011 at 03:33:29PM +0900, Tomoya MORINAGA wrote:
> 2011/12/22 Mark Brown <broonie@...nsource.wolfsonmicro.com>:

> >> Not sorted but queuing only.
> >> In sound/voice control system, queuing is not rare, I think.
> >> If necessary, though this method is very common, I can send the method
> >> of the queue.

> > No, please describe the problem you're trying to fix.

> When CPU is heavy load, this buffer is useful.
> The heavy load causes delaying receiving processing.
> If there is no buffer, stream sound/voice can be broken.
> If there is the buffer, it can prevent the broken sound.

So you're just talking about standard underflows if the application
can't keep up?  There's *no* reason for your driver to do anything about
this, it's a really basic thing that affects all audio hardware.  Just
write a driver for the hardware.
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