linux-kernel - Re: [PATCH][RESEND] ASoC: Intel: atom: fix ACPI/PCI Kconfig

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Date:   Wed, 25 Apr 2018 20:15:10 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     "Pierre-Louis Bossart" <pierre-louis.bossart@...ux.intel.com>
Cc:     <alsa-devel@...a-project.org>, "Arnd Bergmann" <arnd@...db.de>,
        "Daniel Drake" <drake@...lessm.com>,
        "Harsha Priya N" <harshapriya.n@...el.com>,
        "Naveen M" <naveen.m@...el.com>,
        "Vinod Koul" <vinod.koul@...el.com>,
        "Mark Brown" <broonie@...nel.org>,
        "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>,
        <liam.r.girdwood@...ux.intel.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][RESEND] ASoC: Intel: atom: fix ACPI/PCI Kconfig

On Mon, 02 Apr 2018 19:06:14 +0200,
Pierre-Louis Bossart wrote:
> 
> The split between ACPI and PCI platforms generated issues with randconfig:
> 
> with SND_SST_ATOM_HIFI2_PLATFORM_PCI=y and
> SND_SST_ATOM_HIFI2_PLATFORM=m, we get this module link failure:
> 
> ERROR: "sst_context_init"
> [sound/soc/intel/atom/sst/snd-intel-sst-acpi.ko] undefined!
> 
> ERROR: "sst_context_cleanup"
> [sound/soc/intel/atom/sst/snd-intel-sst-acpi.ko] undefined!
> 
> ERROR: "sst_alloc_drv_context"
> [sound/soc/intel/atom/sst/snd-intel-sst-acpi.ko] undefined!
> 
> ERROR: "intel_sst_pm" [sound/soc/intel/atom/sst/snd-intel-sst-acpi.ko]
> undefined!
> 
> ERROR: "sst_configure_runtime_pm"
> [sound/soc/intel/atom/sst/snd-intel-sst-acpi.ko] undefined!
> 
> To keep things simple, let's expose two configs for
> SND_SST_ATOM_HIFI2_PLATFORM_PCI and SND_SST_ATOM_HIFI2_PLATFORM_ACPI,
> which select a common SND_SST_ATOM_HIFI2_PLATFORM option. To avoid
> breaking existing solutions with the semantics change,
> SND_SST_ATOM_HIFI2_PLATFORM_ACPI uses "default ACPI" so that "make
> oldnoconfig" and "make olddefconfig" still work as expected.

So now it reached to my tree, and noticed this "default ACPI".

After reading the patch description, I understand the reason behind
it, but still I'd say this would confuse users.  For example, I was
quite surprised and almost proceeded to build this unnecessary just
because of the expectation to be default "N" in a standard config.

The distros would enable in anyway, so you don't have to care much.
The question is which target should we satisfy more: users who don't
need to turn this on, or users who need this.  In probability, I'd bet
the former :)


Takashi