linux-kernel - Re: [PATCH v2] arm64: defconfig: Enable HDA INTEL config for ARM64

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Date:   Fri, 20 Jan 2023 16:56:44 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Mohan Kumar D <mkumard@...dia.com>, will@...nel.org,
        dmitry.baryshkov@...aro.org, shawnguo@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        treding@...dia.com, jonathanh@...dia.com
Subject: Re: [PATCH v2] arm64: defconfig: Enable HDA INTEL config for ARM64

On Fri, Jan 20, 2023 at 07:20:01AM +0100, Krzysztof Kozlowski wrote:
> On 20/01/2023 06:48, Mohan Kumar D wrote:
> > On 18-01-2023 18:06, Krzysztof Kozlowski wrote:
> >> External email: Use caution opening links or attachments
> >> On 18/01/2023 12:46, Mohan Kumar D wrote:
> >>> On 18-01-2023 13:04, Krzysztof Kozlowski wrote:
> >>>> External email: Use caution opening links or attachments
> >>>> On 17/01/2023 19:16, Mohan Kumar wrote:
> >>>>> Enable CONFIG_SND_HDA_INTEL for NVIDIA PCI based graphics sound card for
> >>>>> ARM64 based platforms as Intel PCI driver was used for registering the
> >>>>> sound card.
> >>>> It's not a part of SoC, not a common device used during debugging or
> >>>> development, so I don't think it is reasonable to enable it. We do not
> >>>> enable driver just because someone uses them. Otherwise please clarify
> >>>> which board has this device embedded (not pluggable by user, but embedded).
> >>> This change is required for enabling HDA sound registration for Nvidia
> >>> discrete GPU cards based on PCI and pluggable to Nvidia Jetson Platforms.
> >> You can plug anything to PCI slot and we do not enable every such PCI
> >> adapter.
> > Without this config enabled, the Intel hda audio driver won't be built 
> > and dGPU won't be able to register sound card. Do you have any 
> > suggestion here?
> 
> Without hundreds of other drivers they also won't be built and won't be
> usable. Anyway, this is just defconfig, so it does not matter. You can
> always enable it in your setup, why is this a problem?
> 
> Again, we do not enable drivers for every PCI card.

I don't think we have any set rules for what goes in a defconfig. If one
has a real use-case, we tend to enable stuff in defconfig, especially if
it's a module.

-- 
Catalin