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ALSA: hda - add helper to get channels from cap bits

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This helper is copied from legacy hda driver.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Subhransu S. Prusty 2016-04-14 10:07:29 +05:30 committed by Mark Brown
parent f55532a0c0
commit 9fc7c862e7
1 changed files with 10 additions and 0 deletions
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10
sound/hda/local.h
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@ -16,6 +16,16 @@ static inline int get_wcaps_type(unsigned int wcaps)
return (wcaps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT; 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) * 2;
return chans;
}
extern const struct attribute_group *hdac_dev_attr_groups[]; extern const struct attribute_group *hdac_dev_attr_groups[];
int hda_widget_sysfs_init(struct hdac_device *codec); int hda_widget_sysfs_init(struct hdac_device *codec);
void hda_widget_sysfs_exit(struct hdac_device *codec); void hda_widget_sysfs_exit(struct hdac_device *codec);