linux-kernel - Re: [alsa-devel] [RFC PATCH 1/7] ASoC: Intel: Fix Kconfig

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Date:   Tue, 21 Nov 2017 18:07:27 +0100
From:   Takashi Iwai <tiwai@...e.de>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Cc:     alsa-devel@...a-project.org, arnd@...db.de,
        linux-kernel@...r.kernel.org, liam.r.girdwood@...ux.intel.com,
        vinod.koul@...el.com, broonie@...nel.org,
        andriy.shevchenko@...ux.intel.com, torvalds@...ux-foundation.org
Subject: Re: [alsa-devel] [RFC PATCH 1/7] ASoC: Intel: Fix Kconfig

On Sat, 18 Nov 2017 01:01:56 +0100,
Pierre-Louis Bossart wrote:
> 
> Follow network example suggested by Linus, move Intel definitions
> in if/endif block and clarify which options distro configurations
> should enable - everything except legacy Baytrail stuff and
> NOCODEC (test only)
> 
> There should be no functionality change - except that sound capabilities
> are restored when using older configs without any user selection.
> 
> Fixes: f6a118a800e3 ("ASoC: Intel: clarify Kconfig dependencies")
> Reported-by: Linus Torvalds <torvalds@...ux-foundation.org>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

A few another things I noticed while looking at the end result:

>  config SND_SOC_INTEL_SKYLAKE
>  	tristate "Intel ASoC SST driver for SKL/BXT/KBL/GLK/CNL"
> -	depends on SND_SOC_INTEL_SST_TOPLEVEL && PCI && ACPI
> +	depends on PCI && ACPI
>  	select SND_HDA_EXT_CORE
>  	select SND_HDA_DSP_LOADER
>  	select SND_SOC_TOPOLOGY
>  	select SND_SOC_INTEL_SST
> +	select SND_SOC_INTEL_COMMON
> +
> +endif ## SND_SOC_INTEL_SST_TOPLEVEL

This endif should cover the whole including the source
boards/Kconfig.  In that way, deselecting SND_SOC_INTEL_SST_TOPLEVEL
will skip the whole.  As of this patch, you'll be still asked about
the board config even if you say TOPLEVEL=n.

>  # ASoC codec drivers
>  source "sound/soc/intel/boards/Kconfig"
> +
> +# configs common to SST and SOF to compile sound/soc/intel/common
> +# directory and use matching tables
> +
> +config SND_SOC_INTEL_COMMON
> +	tristate
> +	select SND_SOC_ACPI_INTEL_MATCH if ACPI
> +
> +config SND_SOC_ACPI_INTEL_MATCH
> +	tristate
> +	select SND_SOC_ACPI if ACPI

... so here should be placed the endif.

> diff --git a/sound/soc/intel/boards/Kconfig b/sound/soc/intel/boards/Kconfig
> index 6f754708a48c..4ae44b0cea0a 100644
> --- a/sound/soc/intel/boards/Kconfig
> +++ b/sound/soc/intel/boards/Kconfig
> @@ -1,7 +1,14 @@
> -config SND_SOC_INTEL_MACH
> -	tristate "Intel Audio machine drivers"
> -	depends on SND_SOC_INTEL_SST_TOPLEVEL
> -	select SND_SOC_ACPI_INTEL_MATCH if ACPI
> +config  SND_SOC_INTEL_MACH
> +	bool "Intel ASoC machine drivers"
> +	default y
> +	help
> +          Intel ASoC Audio Machine Drivers. If you have a Intel machine that
> +          has audio controller with a DSP and I2S or DMIC port, then
> +          enable this option by saying Y
> +
> +	  Note that the answer to this question doesn't directly affect the
> +	  kernel: saying N will just cause the configurator to skip all
> +	  the questions about Intel SST machine drivers.

Do we still need this filtering?  Since we have a top-level filter,
users who want to skip the Intel stuff can say N there already, and I
can't imagine anyone who want only the SST core / platform drivers
built without machine drivers explicitly.


thanks,

Takashi