mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 02:34:01 +08:00
9fc7c862e7
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>
34 lines
791 B
C
34 lines
791 B
C
/*
|
|
* Local helper macros and functions for HD-audio core drivers
|
|
*/
|
|
|
|
#ifndef __HDAC_LOCAL_H
|
|
#define __HDAC_LOCAL_H
|
|
|
|
#define get_wcaps(codec, nid) \
|
|
snd_hdac_read_parm(codec, nid, AC_PAR_AUDIO_WIDGET_CAP)
|
|
|
|
/* get the widget type from widget capability bits */
|
|
static inline int get_wcaps_type(unsigned int wcaps)
|
|
{
|
|
if (!wcaps)
|
|
return -1; /* invalid type */
|
|
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);
|
|
|
|
#endif /* __HDAC_LOCAL_H */
|