LXR linux/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 */
  13static 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
  20static 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
  30extern const struct attribute_group *hdac_dev_attr_groups[];
  31int hda_widget_sysfs_init(struct hdac_device *codec);
  32int hda_widget_sysfs_reinit(struct hdac_device *codec, hda_nid_t start_nid,
  33                            int num_nodes);
  34void hda_widget_sysfs_exit(struct hdac_device *codec);
  35
  36#endif /* __HDAC_LOCAL_H */
  37