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SubjectRe: [alsa-devel] [PATCH V1 1/3] ASoC: fsl: Kconfig: remove dependence of SND_IMX_SOC for SND_SOC_IMX_PCM_DMA
On 08/19/2014 12:35 PM, Takashi Iwai wrote:
> At Tue, 19 Aug 2014 09:00:06 +0000,
> Li.Xiubo@freescale.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.

The item will still be selected regardless of its dependencies, but Kconfig
will print a warning if one or more of the dependencies are not met along
with the dependency chain that causes the warning. So you'll have a clue why
things go wrong.

- Lars



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