ALSA: hda - add helper to get channels from cap bits
authorSubhransu S. Prusty <subhransu.s.prusty@intel.com>
Thu, 14 Apr 2016 04:37:29 +0000 (10:07 +0530)
committerMark Brown <broonie@kernel.org>
Thu, 28 Apr 2016 17:45:26 +0000 (18:45 +0100)
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>
sound/hda/local.h

index d692f417ddc0a2c159092bd76aaa2c2fef8d44a5..0d5bb159d538ef53dcddb1914a3b4068c90f4795 100644 (file)
@@ -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);