linux-kernel - Re: [PATCH] ASoC: SOF: amd: fix soundwire dependencies

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Date: Tue, 20 Feb 2024 13:24:17 +0530
From: "Mukunda,Vijendar" <vijendar.mukunda@....com>
To: Arnd Bergmann <arnd@...db.de>, Arnd Bergmann <arnd@...nel.org>,
 Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
 Liam Girdwood <lgirdwood@...il.com>,
 Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
 Bard Liao <yung-chuan.liao@...ux.intel.com>,
 Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
 Daniel Baluta <daniel.baluta@....com>, Mark Brown <broonie@...nel.org>
Cc: Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
 Venkata Prasad Potturu <venkataprasad.potturu@....com>,
 sound-open-firmware@...a-project.org, linux-sound@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 "Dommati, Sunil-kumar" <Sunil-kumar.Dommati@....com>
Subject: Re: [PATCH] ASoC: SOF: amd: fix soundwire dependencies

On 20/02/24 12:40, Arnd Bergmann wrote:
> On Tue, Feb 20, 2024, at 07:23, Mukunda,Vijendar wrote:
>> On 20/02/24 11:43, Arnd Bergmann wrote:
>>> On Tue, Feb 20, 2024, at 06:57, Mukunda,Vijendar wrote:
>>>> On 19/02/24 15:08, Arnd Bergmann wrote:
>>>>> From: Arnd Bergmann <arnd@...db.de>
>>>>> In normal configs, they should all either be built-in or all loadable
>>>>> modules anyway, so this simplification does not limit any real usecases.
>>>> Tested this patch. SOUNWIRE_AMD flag is not selected by default causing
>>>> AMD SOF driver for ACP 6.3 platform is build without enabling SoundWire.
>>> Yes, that is what I described. But as SOUNWIRE_AMD is a user visible
>>> symbol, there is no problem in expecting users to enable it when they
>>> have this hardware, and distros just enable all the drivers anyway.
>> Want to set SOUNDWIRE_AMD flag by default, similar to Intel & Qcom
>> platforms instead of explicitly enabling the Kconfig option.
> Maybe use 'default SND_SOC_SOF_AMD_TOPLEVEL' then?
Didn't get your point.

Even with the current patch, if we select 'SOUNDWIRE_AMD' flag explicitly
AMD ACP63 SOF driver Kconfig option is not visible for user configuration.
This results in ACP63 SOF driver won't be built at all.



>
> I don't think copying the mistake from the intel driver
> is helpful, though I agree it would be nice to be consistent
> between them.
>
> As a general rule, you should not have a Kconfig symbol that
> is both user visible and also selected by the drivers that
> depend on it.
>
> To avoid the dependency problems from coming back and keep
> the complexity to a minimum, I think there are two logical
> ways to handle soundwire:
>
> a) keep the current drivers/soundwire/Kconfig contents and
>    change all the 'select SOUNDWIRE_foo' to 'depends on'.
Current patch already using 'depends on SOUNDWIRE_AMD" for
SND_SOC_SOF_AMD_SOUNDWIRE Kconfig option.
Still we couldn't see SND_SOC_SOF_AMD_ACP63 Kconfig option
is enabled.
>
> b) keep all the 'select SOUNDWIRE_foo' but drop the prompts,
>    requiring that all drivers that use soundwire have the
>    correct select statements, with the main CONFIG_SOUNDWIRE
>    getting selected by the individual drivers.
Didn't get your point. Could you please elaborate?

>     Arnd