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[04/11] ALSA: hda - add helper to get channels from cap bits

Message ID 1460437293-8509-5-git-send-email-subhransu.s.prusty@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Subhransu S. Prusty April 12, 2016, 5:01 a.m. UTC 
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>
---
 sound/hda/local.h | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

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;
+
+	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);