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Date:   Sun, 6 Feb 2022 08:34:22 -0300
From:   Arnaldo Carvalho de Melo <acme@kernel.org>
To:     Takashi Iwai <tiwai@suse.de>
Cc:     Mark Brown <broonie@kernel.org>,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Takashi Sakamoto <o-takashi@sakamocchi.jp>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/1 fyi] tools include UAPI: Sync sound/asound.h copy
 with the kernel sources
Message-ID: <Yf+yPiujVTH2nkW8@kernel.org>
References: <YflN0j09T+6ODHIh@kernel.org>
 <s5hleytzhca.wl-tiwai@suse.de>
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Em Wed, Feb 02, 2022 at 11:35:33AM +0100, Takashi Iwai escreveu:
> On Tue, 01 Feb 2022 16:12:18 +0100,
> Arnaldo Carvalho de Melo wrote:
> > 
> > Picking the changes from:
> > 
> >   55b71f6c29f2a78a ("ALSA: uapi: use C90 comment style instead of C99 style")
> >   fb6723daf89083a0 ("ALSA: pcm: comment about relation between msbits hw parameter and [S|U]32 formats")
> >   b456abe63f60ad93 ("ALSA: pcm: introduce INFO_NO_REWINDS flag")
> >   5aec579e08e4f2be ("ALSA: uapi: Fix a C++ style comment in asound.h")
> > 
> > Which entails no changes in the tooling side as it doesn't introduce new
> > SNDRV_PCM_IOCTL_ ioctls.
> > 
> > To silence this perf tools build warning:
> > 
> >   Warning: Kernel ABI header at 'tools/include/uapi/sound/asound.h' differs from latest version at 'include/uapi/sound/asound.h'
> >   diff -u tools/include/uapi/sound/asound.h include/uapi/sound/asound.h
> > 
> > Cc: Mark Brown <broonie@kernel.org>
> > Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> > Cc: Takashi Iwai <tiwai@suse.de>
> > Cc: Takashi Sakamoto <o-takashi@sakamocchi.jp>
> > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> 
> Thanks for the patch.
> Shall I merge this through sound git tree or was already merged in
> somewhere else?

It'll go thru the perf tools tree, thanks.

- Arnaldo
 
> 
> Takashi
> 
> > ---
> >  tools/include/uapi/sound/asound.h | 7 ++++++-
> >  1 file changed, 6 insertions(+), 1 deletion(-)
> > 
> > diff --git a/tools/include/uapi/sound/asound.h b/tools/include/uapi/sound/asound.h
> > index 5fbb79e30819af91..ef0cafe295b28253 100644
> > --- a/tools/include/uapi/sound/asound.h
> > +++ b/tools/include/uapi/sound/asound.h
> > @@ -202,6 +202,11 @@ typedef int __bitwise snd_pcm_format_t;
> >  #define	SNDRV_PCM_FORMAT_S24_BE	((__force snd_pcm_format_t) 7) /* low three bytes */
> >  #define	SNDRV_PCM_FORMAT_U24_LE	((__force snd_pcm_format_t) 8) /* low three bytes */
> >  #define	SNDRV_PCM_FORMAT_U24_BE	((__force snd_pcm_format_t) 9) /* low three bytes */
> > +/*
> > + * For S32/U32 formats, 'msbits' hardware parameter is often used to deliver information about the
> > + * available bit count in most significant bit. It's for the case of so-called 'left-justified' or
> > + * `right-padding` sample which has less width than 32 bit.
> > + */
> >  #define	SNDRV_PCM_FORMAT_S32_LE	((__force snd_pcm_format_t) 10)
> >  #define	SNDRV_PCM_FORMAT_S32_BE	((__force snd_pcm_format_t) 11)
> >  #define	SNDRV_PCM_FORMAT_U32_LE	((__force snd_pcm_format_t) 12)
> > @@ -300,7 +305,7 @@ typedef int __bitwise snd_pcm_subformat_t;
> >  #define SNDRV_PCM_INFO_HAS_LINK_ESTIMATED_ATIME    0x04000000  /* report estimated link audio time */
> >  #define SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME 0x08000000  /* report synchronized audio/system time */
> >  #define SNDRV_PCM_INFO_EXPLICIT_SYNC	0x10000000	/* needs explicit sync of pointers and data */
> > -
> > +#define SNDRV_PCM_INFO_NO_REWINDS	0x20000000	/* hardware can only support monotonic changes of appl_ptr */
> >  #define SNDRV_PCM_INFO_DRAIN_TRIGGER	0x40000000		/* internal kernel flag - trigger in drain */
> >  #define SNDRV_PCM_INFO_FIFO_IN_FRAMES	0x80000000	/* internal kernel flag - FIFO size is in frames */
> >  
> > -- 
> > 2.34.1
> > 

-- 

- Arnaldo