linux-kernel - Re: [PATCH v3 08/11] ASoC: Intel: atom: Make PCI dependency explicit

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Date:   Wed, 26 Dec 2018 11:35:05 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Sinan Kaya <okaya@...nel.org>, linux-next@...r.kernel.org
Cc:     linux-acpi@...r.kernel.org,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        "moderated list:INTEL ASoC DRIVERS" <alsa-devel@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 08/11] ASoC: Intel: atom: Make PCI dependency explicit


On 12/23/18 5:25 PM, Sinan Kaya wrote:
> Code does unconditional select for IOSF_MBI. IOSF_MBI driver depends on
> CONFIG_PCI set but this is not specified anywhere.

Can you please share the .config that exposes this problem? This hasn't 
changed in a long time and I wonder why this pops up now. You have 
similar cases elsewhere, e.g. arch/x86/Kconfig

config X86_INTEL_LPSS
     bool "Intel Low Power Subsystem Support"
     depends on X86 && ACPI
     select COMMON_CLK
     select PINCTRL
     select IOSF_MBI

or for the MMC.

config MMC_SDHCI_ACPI
     tristate "SDHCI support for ACPI enumerated SDHCI controllers"
     depends on MMC_SDHCI && ACPI
     select IOSF_MBI if X86

The use of IOSF_MBI is only for the Baytrail-CR detection and there are 
already in-flight patches to change the code and move it to a helper.

My understanding is that for compilation you only need CONFIG_x86 since 
there are fall-back routines available in iosf_mbi.h

Thanks!

>
> Signed-off-by: Sinan Kaya <okaya@...nel.org>
> ---
>   sound/soc/intel/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
> index 2fd1b61e8331..b0764b2fe001 100644
> --- a/sound/soc/intel/Kconfig
> +++ b/sound/soc/intel/Kconfig
> @@ -91,7 +91,7 @@ config SND_SST_ATOM_HIFI2_PLATFORM_PCI
>   config SND_SST_ATOM_HIFI2_PLATFORM_ACPI
>   	tristate "ACPI HiFi2 (Baytrail, Cherrytrail) Platforms"
>   	default ACPI
> -	depends on X86 && ACPI
> +	depends on X86 && ACPI && PCI
>   	select SND_SST_IPC_ACPI
>   	select SND_SST_ATOM_HIFI2_PLATFORM
>   	select SND_SOC_ACPI_INTEL_MATCH