linux-kernel - Re: [alsa-devel] [PATCH v6] sound/soc/codecs: add LAPIS Semiconductor ML26124

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Date:	Fri, 16 Mar 2012 18:55:09 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	alsa-devel@...a-project.org, qi.wang@...el.com,
	Takashi Iwai <tiwai@...e.de>, linux-kernel@...r.kernel.org,
	yong.y.wang@...el.com, kok.howg.ewe@...el.com,
	Liam Girdwood <lrg@...com>, joel.clark@...el.com
Subject: Re: [alsa-devel] [PATCH v6] sound/soc/codecs: add LAPIS Semiconductor ML26124

On Thu, Mar 15, 2012 at 3:29 PM, Tomoya MORINAGA <tomoya.rohm@...il.com> wrote:
>> If this is for all registers, how does stuff like DAPM work, which uses the
>> framework internal update_bits function?
>>
>> If it's the case that the write address is always read address + 1 you can
>> still use the framework if you set write_flag_mask to 0x01 in your regmap
>> config. In my opinion it even makes sense to shift all the register numbers
>> to the left by one and use a 7/9 instead of a 8/8 addr/reg layout. This will
>> reduce the amount of memory wasted due to holes in the register cache.
>
> Thank you for your information.
> I've just been investigating these.
> I also found ASoC core access i2c driver via snd_soc_update_bits or others.
> As a result, write register address is the same as read's.
>
> I'll try to implement these.
>
> BTW, currently, by settting ML26124 codec with fixed value,
> I've confirmed both playback and capture work well.

Thank you for your help,
almost of ML26124 registers can be set correctly except SUPPLY.
So, I have a question.

When SND_SOC_DAPM_SUPPLY is executed ?
or
Do I need to execute from application (like amixer) ?

thanks in advance.

-- 
ROHM Co., Ltd.
tomoya
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