On Tue, 12 Apr 2016 11:56:10 +0200,
Subhransu S. Prusty wrote:
>
> This helper is copied from legacy hda driver.
>
> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@xxxxxxxxx>
> Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxx>
> ---
> sound/hda/local.h | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/sound/hda/local.h b/sound/hda/local.h
> index d692f41..57f07d7 100644
> --- a/sound/hda/local.h
> +++ b/sound/hda/local.h
> @@ -16,6 +16,16 @@ static inline int get_wcaps_type(unsigned int wcaps)
> return (wcaps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
> }
>
> +static inline unsigned int get_wcaps_channels(u32 wcaps)
> +{
> + unsigned int chans;
> +
> + chans = (wcaps & AC_WCAP_CHAN_CNT_EXT) >> 13;
> + chans = ((chans << 1) | 1) + 1;
Let's make it simple. This is equivalent with
chans = (chans + 1) * 2;
Takashi
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