sound/hda/local.h

   1 /*
   2  * Local helper macros and functions for HD-audio core drivers
   3  */
   4
   5 #ifndef __HDAC_LOCAL_H
   6 #define __HDAC_LOCAL_H
   7
   8 #define get_wcaps(codec, nid) \
   9         snd_hdac_read_parm(codec, nid, AC_PAR_AUDIO_WIDGET_CAP)
  10
  11 /* get the widget type from widget capability bits */
  12 static inline int get_wcaps_type(unsigned int wcaps)
  13 {
  14         if (!wcaps)
  15                 return -1; /* invalid type */
  16         return (wcaps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
  17 }
  18
  19 static inline unsigned int get_wcaps_channels(u32 wcaps)
  20 {
  21         unsigned int chans;
  22
  23         chans = (wcaps & AC_WCAP_CHAN_CNT_EXT) >> 13;
  24         chans = (chans + 1) * 2;
  25
  26         return chans;
  27 }
  28
  29 extern const struct attribute_group *hdac_dev_attr_groups[];
  30 int hda_widget_sysfs_init(struct hdac_device *codec);
  31 void hda_widget_sysfs_exit(struct hdac_device *codec);
  32
  33 #endif /* __HDAC_LOCAL_H */