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authorSubhransu S. Prusty <subhransu.s.prusty@intel.com>2016-04-14 07:37:29 +0300
committerMark Brown <broonie@kernel.org>2016-04-28 20:45:26 +0300
commit9fc7c862e78ba8bec142935673227f2463aa05a5 (patch)
tree37264c5f18f8b76f282af7bfdf6b51c48b93bc03 /sound/hda
parentf55532a0c0b8bb6148f4e07853b876ef73bc69ca (diff)
downloadlinux-9fc7c862e78ba8bec142935673227f2463aa05a5.tar.xz
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')
-rw-r--r--sound/hda/local.h10
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);