diff options
| author | Subhransu S. Prusty <subhransu.s.prusty@intel.com> | 2016-04-14 10:07:29 +0530 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-04-28 18:45:26 +0100 |
| commit | 9fc7c862e78ba8bec142935673227f2463aa05a5 (patch) | |
| tree | 37264c5f18f8b76f282af7bfdf6b51c48b93bc03 /sound/hda/local.h | |
| parent | f55532a0c0b8bb6148f4e07853b876ef73bc69ca (diff) | |
| download | lwn-9fc7c862e78ba8bec142935673227f2463aa05a5.tar.gz lwn-9fc7c862e78ba8bec142935673227f2463aa05a5.zip | |
ALSA: hda - add helper to get channels from cap bits
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>
Diffstat (limited to 'sound/hda/local.h')
| -rw-r--r-- | sound/hda/local.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sound/hda/local.h b/sound/hda/local.h index d692f417ddc0..0d5bb159d538 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) * 2; + + return chans; +} + extern const struct attribute_group *hdac_dev_attr_groups[]; int hda_widget_sysfs_init(struct hdac_device *codec); void hda_widget_sysfs_exit(struct hdac_device *codec); |