linux-kernel - Re: [alsa-devel] [PATCH V1 1/3] ASoC: fsl: Kconfig: remove dependence of SND_IMX_SOC for SND_SOC_IMX_PCM

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Date:	Tue, 19 Aug 2014 12:35:21 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>
Cc:	"shengjiu.wang@...escale.com" <shengjiu.wang@...escale.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"perex@...ex.cz" <perex@...ex.cz>,
	"nicoleotsuka@...il.com" <nicoleotsuka@...il.com>,
	"shc_work@...l.ru" <shc_work@...l.ru>,
	"Fabio.Estevam@...escale.com" <Fabio.Estevam@...escale.com>,
	"xobs@...agi.com" <xobs@...agi.com>,
	"arnd@...db.de" <arnd@...db.de>,
	"sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
	"timur@...i.org" <timur@...i.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [alsa-devel] [PATCH V1 1/3] ASoC: fsl: Kconfig: remove dependence of SND_IMX_SOC for SND_SOC_IMX_PCM_DMA

At Tue, 19 Aug 2014 09:00:06 +0000,
Li.Xiubo@...escale.com wrote:
> 
> How about the following :
> 
> 
> diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
> index 5ae777a..d42f18c 100644
> --- a/sound/soc/fsl/Kconfig
> +++ b/sound/soc/fsl/Kconfig
> @@ -15,7 +15,7 @@ config SND_SOC_FSL_ASRC
>  config SND_SOC_FSL_SAI
>         tristate "Synchronous Audio Interface (SAI) module support"
>         select REGMAP_MMIO
> -       select SND_SOC_IMX_PCM_DMA if SND_IMX_SOC != n
> +       select SND_SOC_IMX_PCM_DMA
>         select SND_SOC_GENERIC_DMAENGINE_PCM
>         help
>           Say Y if you want to add Synchronous Audio Interface (SAI)
> @@ -25,7 +25,7 @@ config SND_SOC_FSL_SAI
> 
>  config SND_SOC_FSL_SSI
>         tristate "Synchronous Serial Interface module support"
> -       select SND_SOC_IMX_PCM_DMA if SND_IMX_SOC != n
> +       select SND_SOC_IMX_PCM_DMA
>         select SND_SOC_IMX_PCM_FIQ if SND_IMX_SOC != n && (MXC_TZIC || MXC_AVIC)
>         select REGMAP_MMIO
>         help
> @@ -37,7 +37,7 @@ config SND_SOC_FSL_SSI
>  config SND_SOC_FSL_SPDIF
>         tristate "Sony/Philips Digital Interface module support"
>         select REGMAP_MMIO
> -       select SND_SOC_IMX_PCM_DMA if SND_IMX_SOC != n
> +       select SND_SOC_IMX_PCM_DMA
>         select SND_SOC_IMX_PCM_FIQ if SND_IMX_SOC != n && (MXC_TZIC || MXC_AVIC)
>         help
>           Say Y if you want to add Sony/Philips Digital Interface (SPDIF)
> @@ -48,7 +48,7 @@ config SND_SOC_FSL_SPDIF
>  config SND_SOC_FSL_ESAI
>         tristate "Enhanced Serial Audio Interface (ESAI) module support"
>         select REGMAP_MMIO
> -       select SND_SOC_IMX_PCM_DMA if SND_IMX_SOC != n
> +       select SND_SOC_IMX_PCM_DMA
>         help
>           Say Y if you want to add Enhanced Synchronous Audio Interface
>           (ESAI) support for the Freescale CPUs.
> @@ -76,6 +76,7 @@ config SND_SOC_FSL_ASOC_CARD
> 
>  config SND_SOC_IMX_PCM_DMA
>         tristate
> +       depends on SND_IMX_SOC
>         select SND_SOC_GENERIC_DMAENGINE_PCM
> 
>  config SND_SOC_IMX_AUDMUX

I see the problem has been addressed, so JFYI: a reverse selection
doesn't resolve "depends on".  It's a known shortcoming.  That is, a
selected item can select further others, but cannot depend on others.


Takashi
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