linux-kernel - Re: (subset) [PATCH v7 00/16] Add audio support for the MediaTek Genio 350-evk board

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Message-ID: <ZttJdexQFOq2Q9iQ@finisterre.sirena.org.uk>
Date: Fri, 6 Sep 2024 19:27:01 +0100
From: Mark Brown <broonie@...nel.org>
To: Nathan Chancellor <nathan@...nel.org>
Cc: Alexandre Mergnat <amergnat@...libre.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Lee Jones <lee@...nel.org>, Flora Fu <flora.fu@...iatek.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Christian König <christian.koenig@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	linux-sound@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, linux-media@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Nicolas Belin <nbelin@...libre.com>
Subject: Re: (subset) [PATCH v7 00/16] Add audio support for the MediaTek
 Genio 350-evk board

On Fri, Sep 06, 2024 at 11:03:48AM -0700, Nathan Chancellor wrote:

> I am seeing several warnings/errors from both GCC and Clang with
> ARCH=arm64 allmodconfig after this series appeared in next-20240906.
> As far as I can tell, they appear to agree. I wondered how this was not
> caught during the series development but perhaps it was written against
> a development tree that did not have Arnd's extrawarn series from 6.10
> in it yet? I was going to work on a series but I was not sure about the
> best way to address the overflow errors, hence just the report.

Are these just warnings introduced by recent versions of the toolchains?
These commits passed an x86 allmodconfig with GCC 12 at each step (I did
catch one warning there with another patch in the series that didn't get
applied) and 0day didn't say anything at any point.

> Clang 19:

That's relatively modern, though some of the warnings don't look
particularly new and exciting.

>   sound/soc/mediatek/mt8365/mt8365-dai-adda.c:93:8: error: implicit conversion from 'unsigned long' to 'unsigned int' changes value from 18446744073709551614 to 4294967294 [-Werror,-Wconstant-conversion]
>      91 |                 regmap_update_bits(afe->regmap, AFE_ADDA_UL_DL_CON0,
>         |                 ~~~~~~~~~~~~~~~~~~
>      92 |                                    AFE_ADDA_UL_DL_ADDA_AFE_ON,
>      93 |                                    ~AFE_ADDA_UL_DL_ADDA_AFE_ON);
>         |                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>   1 error generated.

That's a bit surprising, regmap_update_bits() takes an unsigned long?  I
suspect the constants need to be defined as unsigned.

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