[PATCH v2 2/6] ALSA: Add definitions for the bits in IEC958 subframe

[Marc Kleine-Budde]

On 24.07.2025 09:37:09, Takashi Iwai wrote:
> On Thu, 24 Jul 2025 09:22:44 +0200,
> Shengjiu Wang wrote:
> > 
> > The IEC958 subframe format SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE are used
> > in HDMI and DisplayPort to describe the audio stream, but hardware device
> > may need to reorder the IEC958 bits for internal transmission, so need
> > these standard bits definitions for IEC958 subframe format.
> > 
> > Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
> > ---
> >  include/sound/asoundef.h | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> > 
> > diff --git a/include/sound/asoundef.h b/include/sound/asoundef.h
> > index 09b2c3dffb30..7efd61568636 100644
> > --- a/include/sound/asoundef.h
> > +++ b/include/sound/asoundef.h
> > @@ -12,6 +12,15 @@
> >   *        Digital audio interface					    *
> >   *                                                                          *
> >   ****************************************************************************/
> > +/* IEC958 subframe format */
> > +#define IEC958_SUBFRAME_PREAMBLE_MASK	(0xf)
> > +#define IEC958_SUBFRAME_AUXILIARY_MASK	(0xf<<4)
> > +#define IEC958_SUBFRAME_SAMPLE_24_MASK	(0xffffff<<4)
> > +#define IEC958_SUBFRAME_SAMPLE_20_MASK	(0xfffff<<8)
> > +#define IEC958_SUBFRAME_VALIDITY	(0x1<<28)
> > +#define IEC958_SUBFRAME_USER_DATA	(0x1<<29)
> > +#define IEC958_SUBFRAME_CHANNEL_STATUS	(0x1<<30)
> > +#define IEC958_SUBFRAME_PARITY		(0x1<<31)
> 
> I'd use "U" suffix as it can reach to the MSB.
> Also, you can put spaces around the operators to align with the
> standard format, too.  I guess you followed to the other code there,
> but following to the standard coding style would be better.
> 
> With those addressed, feel free to take my ack for this patch:

Or make use of the BIT() and GEN_MASK() helpers.

Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
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