linux-kernel - Re: [PATCH 2/4] ASoC: rockchip: add rockchip machine driver for max98090

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Message-ID: <55535048.4030703@rock-chips.com>
Date:	Wed, 13 May 2015 21:23:20 +0800
From:	zhengxing <zhengxing@...k-chips.com>
To:	Mark Brown <broonie@...nel.org>
CC:	Xing Zheng <acgzxing@...il.com>, dgreid@...omium.org,
	dianders@...omium.org, heiko@...ech.de, sonnyrao@...omium.org,
	linux-rockchip@...ts.infradead.org,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/4] ASoC: rockchip: add rockchip machine driver for max98090

On 2015年05月13日 03:26, Mark Brown wrote:
> On Tue, May 12, 2015 at 05:26:35PM +0800, Xing Zheng wrote:
>
>>   sound/soc/rockchip/Kconfig                   |   10 ++
>>   sound/soc/rockchip/Makefile                  |    2 +
>>   sound/soc/rockchip/rockchip_machine_driver.c |    6 +
>>   sound/soc/rockchip/rockchip_machine_driver.h |    6 +
>>   sound/soc/rockchip/rockchip_max98090.c       |  185 ++++++++++++++++++++++++++
> This looks more like a normal and reasonable machine driver but then why
> have you created the generic rockchip machine driver?  It seems like
> this should just be a regular machine driver like other platforms have,
> were it not for that this would be mostly fine apart from a couple of
> nitpicks below.
We just use rockchip_machine_driver to describe the supported codecs base on
origianl way, vendor machine driver(rockchip_max98090) will achieve 
functions.
>> +config SND_SOC_ROCKCHIP_MAX98090
>> +	tristate "ASoC support for Rockchip boards using a MAX98090 codec"
>> +	depends on SND_SOC_ROCKCHIP&&  I2C&&  GPIOLIB
>> +	select SND_SOC_ROCKCHIP_I2S
>> +	select SND_SOC_MAX98090
>> +	select SND_SOC_TS3A227E
> This looks like it's a driver specific to Chromebooks (possibly even
> specific Chromeooks) and so should be named as such.
>
>> +	card->dapm.idle_bias_off = true;
> Just set this when declaring the card, don't do it at runtime.
Thanks, I got it.
>> +	snd_soc_dapm_enable_pin(dapm, "Headset Mic");
>> +	snd_soc_dapm_enable_pin(dapm, "Headphone");
>> +	snd_soc_dapm_enable_pin(dapm, "Speaker");
>> +	snd_soc_dapm_enable_pin(dapm, "Int Mic");
> No need to do this, all pins are enabled by default.
Yes, I got it.
>> +	snd_soc_dapm_sync(dapm);
> This has no effect during initialization.
Yes, I got it.

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