diff options
Diffstat (limited to 'include/sound/hdaudio.h')
| -rw-r--r-- | include/sound/hdaudio.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index 47e20b741c51..ddfcc44970fa 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -105,12 +105,30 @@ int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd, unsigned int flags, unsigned int *res); int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid, unsigned int verb, unsigned int parm, unsigned int *res); -int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm); +int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm, + unsigned int *res); int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid, hda_nid_t *conn_list, int max_conns); int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid, hda_nid_t *start_id); +/** + * snd_hdac_read_parm - read a codec parameter + * @codec: the codec object + * @nid: NID to read a parameter + * @parm: parameter to read + * + * Returns -1 for error. If you need to distinguish the error more + * strictly, use _snd_hdac_read_parm() directly. + */ +static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, + int parm) +{ + unsigned int val; + + return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val; +} + #ifdef CONFIG_PM void snd_hdac_power_up(struct hdac_device *codec); void snd_hdac_power_down(struct hdac_device *codec); |