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

[Nathan Chancellor <nathan@kernel.org>]

On Fri, Sep 06, 2024 at 07:27:01PM +0100, Mark Brown wrote:
> 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.

Not sure, I did not look too hard. At cursory glance, I am not sure x86
allmodconfig would catch these, as this code depends on ARCH_MEDIATEK
(not COMPILE_TEST), which only exists for arm and arm64.

> > Clang 19:
> 
> That's relatively modern, though some of the warnings don't look
> particularly new and exciting.

Fair although I still see some of them on old versions too:

https://github.com/ClangBuiltLinux/continuous-integration2/actions/runs/10738441894

> >   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.

Does it? I see it taking 'unsigned int' for all of its parameters.

$ sed -n '1242,1250p' include/linux/regmap.h
int regmap_update_bits_base(struct regmap *map, unsigned int reg,
                            unsigned int mask, unsigned int val,
                            bool *change, bool async, bool force);

static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
                                     unsigned int mask, unsigned int val)
{
        return regmap_update_bits_base(map, reg, mask, val, NULL, false, false);
}

Cheers,
Nathan