sound/hda/local.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Local helper macros and functions for HD-audio core drivers
   4  */
   5
   6 #ifndef __HDAC_LOCAL_H
   7 #define __HDAC_LOCAL_H
   8
   9 #define get_wcaps(codec, nid) \
  10         snd_hdac_read_parm(codec, nid, AC_PAR_AUDIO_WIDGET_CAP)
  11
  12 /* get the widget type from widget capability bits */
  13 static inline int get_wcaps_type(unsigned int wcaps)
  14 {
  15         if (!wcaps)
  16                 return -1; /* invalid type */
  17         return (wcaps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
  18 }
  19
  20 static inline unsigned int get_wcaps_channels(u32 wcaps)
  21 {
  22         unsigned int chans;
  23
  24         chans = (wcaps & AC_WCAP_CHAN_CNT_EXT) >> 13;
  25         chans = (chans + 1) * 2;
  26
  27         return chans;
  28 }
  29
  30 extern const struct attribute_group *hdac_dev_attr_groups[];
  31 int hda_widget_sysfs_init(struct hdac_device *codec);
  32 int hda_widget_sysfs_reinit(struct hdac_device *codec, hda_nid_t start_nid,
  33                             int num_nodes);
  34 void hda_widget_sysfs_exit(struct hdac_device *codec);
  35
  36 #endif /* __HDAC_LOCAL_H */