linux-kernel - Re: [PATCH] ASoC: codecs-ac97: make selectable in config

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Date:	Thu, 14 May 2015 20:46:09 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Mark Brown <broonie@...nel.org>,
	"Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
CC:	alsa-devel@...a-project.org, Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Brian Austin <brian.austin@...rus.com>,
	Bard Liao <bardliao@...ltek.com>,
	Oder Chiou <oder_chiou@...ltek.com>,
	Wolfram Sang <wsa@...-dreams.de>, linux-kernel@...r.kernel.org,
	Fabio Estevam <festevam@...il.com>
Subject: Re: [PATCH] ASoC: codecs-ac97: make selectable in config

On 05/14/2015 07:53 PM, Mark Brown wrote:
> On Wed, May 13, 2015 at 10:57:24PM +0200, Maciej S. Szmigiero wrote:
>> W dniu 12.05.2015 19:58, Mark Brown pisze:
>>> On Sun, May 10, 2015 at 12:12:04AM +0200, Maciej S. Szmigiero wrote:
>
>>>> @@ -16,7 +16,7 @@ config SND_SOC_ALL_CODECS
>>>>   	select SND_SOC_88PM860X if MFD_88PM860X
>>>>   	select SND_SOC_L3
>>>>   	select SND_SOC_AB8500_CODEC if ABX500_CORE
>>>> -	select SND_SOC_AC97_CODEC if SND_SOC_AC97_BUS
>>>> +	select SND_SOC_AC97_CODEC
>>>>   	select SND_SOC_AD1836 if SPI_MASTER
>>>>   	select SND_SOC_AD193X_SPI if SPI_MASTER
>>>>   	select SND_SOC_AD193X_I2C if I2C
>
>>> No, you're missing the point of what _ALL_CODECS does - it builds
>>> everything possible.  This will break the build for systems without
>>> AC'97 support.
>
>> How?
>> In the second hunk of the patch I've made SND_SOC_AC97_CODEC select
>> SND_SOC_AC97_BUS.
>
> select doesn't respect dependencies, it'll just force on the selected
> symbol.

The patch works fine, neither SND_SOC_AC97_BUS nor the symbols selected by 
SND_SOC_AC97_BUS have any dependencies.

Although one might argue that only AC97 host driver should select 
SND_SOC_AC97_BUS and the CODEC drivers should depend on it.

- Lars

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