Re: [PATCH v3] ASoC: atmel: ATMEL drivers don't need HAS_DMA

From: <Codrin.Ciubotariu@microchip.com>
To: <rdunlap@infradead.org>, <linux-kernel@vger.kernel.org>
Cc: <alsa-devel@alsa-project.org>, <lgirdwood@gmail.com>,
	<broonie@kernel.org>, <mirq-linux@rere.qmqm.pl>,
	<alexandre.belloni@free-electrons.com>
Subject: Re: [PATCH v3] ASoC: atmel: ATMEL drivers don't need HAS_DMA
Date: Thu, 8 Jul 2021 08:19:07 +0000	[thread overview]
Message-ID: <fca8f952-2be0-5c57-d60d-5c4f025abc4d@microchip.com> (raw)
In-Reply-To: <20210707214752.3831-1-rdunlap@infradead.org>

On 08.07.2021 00:47, Randy Dunlap wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On a config (such as arch/sh/) which does not set HAS_DMA when MMU
> is not set, several ATMEL ASoC drivers select symbols that cause
> kconfig warnings. There is one "depends on HAS_DMA" which is no longer
> needed. Dropping it eliminates the kconfig warnings and still builds
> with no problems reported.
> 
> Fix the following kconfig warnings:
> 
> WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_PDC
>    Depends on [n]: SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && HAS_DMA [=n]
>    Selected by [m]:
>    - SND_ATMEL_SOC_SSC [=m] && SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m]
>    - SND_ATMEL_SOC_SSC_PDC [=m] && SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && ATMEL_SSC [=m]
> 
> WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_SSC_PDC
>    Depends on [n]: SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && ATMEL_SSC [=m] && HAS_DMA [=n]
>    Selected by [m]:
>    - SND_AT91_SOC_SAM9G20_WM8731 [=m] && SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && (ARCH_AT91 || COMPILE_TEST [=y]) && ATMEL_SSC [=m] && SND_SOC_I2C_AND_SPI [=m]
> 
> WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_SSC
>    Depends on [n]: SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && HAS_DMA [=n]
>    Selected by [m]:
>    - SND_ATMEL_SOC_SSC_DMA [=m] && SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && ATMEL_SSC [=m]
> 
> WARNING: unmet direct dependencies detected for SND_ATMEL_SOC_SSC_DMA
>    Depends on [n]: SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && ATMEL_SSC [=m] && HAS_DMA [=n]
>    Selected by [m]:
>    - SND_ATMEL_SOC_WM8904 [=m] && SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && (ARCH_AT91 || COMPILE_TEST [=y]) && ATMEL_SSC [=m] && I2C [=m]
>    - SND_AT91_SOC_SAM9X5_WM8731 [=m] && SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_ATMEL_SOC [=m] && (ARCH_AT91 || COMPILE_TEST [=y]) && ATMEL_SSC [=m] && SND_SOC_I2C_AND_SPI [=m]
> 
> Fixes: 3951e4aae2ce ("ASoC: atmel-pcm: dma support based on pcm dmaengine")
> Fixes: 18291410557f ("ASoC: atmel: enable SOC_SSC_PDC and SOC_SSC_DMA in Kconfig")
> Fixes: 061981ff8cc8 ("ASoC: atmel: properly select dma driver state")

I am not sure about these fixes tags. As Alexandre mentioned, it looks 
like the reason for HAS_DMA in the first place was the COMPILE_TEST with 
m32r arch. I dig a bit, and, if any, I think we should use:
Fixes: eb17726b00b3 ("m32r: add simple dma")
since this commit adds dummy DMA support for m32r and seems to fix the 
HAS_DMA dependency.

> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
> Cc: alsa-devel@alsa-project.org
> Cc: Liam Girdwood <lgirdwood@gmail.com>
> Cc: Mark Brown <broonie@kernel.org>
> Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl>

Other than that:
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>

Thanks!
Codrin