ALSA: usb-audio: make set_*_mix_values functions public

Make the functions set_cur_mix_value and get_cur_mix_value accessible by files
that include mixer.h. In addition make usb_mixer_elem_free accessible.
This allows reuse of these functions by mixers that may require quirks.

The following summarizes the renamed functions:
  - set_cur_mix_value -> snd_usb_set_cur_mix_value
  - get_cur_mix_value -> snd_usb_get_cur_mix_value
  - usb_mixer_elem_free -> snd_usb_mixer_elem_free

Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 26 insertions, 25 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index e4aaa21baed2..14e1455ca9de 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -412,7 +412,7 @@ static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
                              value);
 }
 
-static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
+int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
                              int channel, int index, int *value)
 {
         int err;
@@ -497,7 +497,7 @@ static int set_cur_ctl_value(struct usb_mixer_elem_info *cval,
         return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
 }
 
-static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
+int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
                              int index, int value)
 {
         int err;
@@ -815,7 +815,7 @@ static struct usb_feature_control_info audio_feature_info[] = {
 };
 
 /* private_free callback */
-static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
+void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl)
 {
         kfree(kctl->private_data);
         kctl->private_data = NULL;
@@ -998,7 +998,7 @@ static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
                                 else
                                         test -= cval->res;
                                 if (test < cval->min || test > cval->max ||
-                                    set_cur_mix_value(cval, minchn, 0, test) ||
+                                    snd_usb_set_cur_mix_value(cval, minchn, 0, test) ||
                                     get_cur_mix_raw(cval, minchn, &check)) {
                                         cval->res = last_valid_res;
                                         break;
@@ -1007,7 +1007,7 @@ static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
                                         break;
                                 cval->res *= 2;
                         }
-                        set_cur_mix_value(cval, minchn, 0, saved);
+                        snd_usb_set_cur_mix_value(cval, minchn, 0, saved);
                 }
 
                 cval->initialized = 1;
@@ -1086,7 +1086,7 @@ static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
                 for (c = 0; c < MAX_CHANNELS; c++) {
                         if (!(cval->cmask & (1 << c)))
                                 continue;
-                        err = get_cur_mix_value(cval, c + 1, cnt, &val);
+                        err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val);
                         if (err < 0)
                                 return cval->mixer->ignore_ctl_error ? 0 : err;
                         val = get_relative_value(cval, val);
@@ -1096,7 +1096,7 @@ static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
                 return 0;
         } else {
                 /* master channel */
-                err = get_cur_mix_value(cval, 0, 0, &val);
+                err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
                 if (err < 0)
                         return cval->mixer->ignore_ctl_error ? 0 : err;
                 val = get_relative_value(cval, val);
@@ -1118,26 +1118,26 @@ static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
                 for (c = 0; c < MAX_CHANNELS; c++) {
                         if (!(cval->cmask & (1 << c)))
                                 continue;
-                        err = get_cur_mix_value(cval, c + 1, cnt, &oval);
+                        err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval);
                         if (err < 0)
                                 return cval->mixer->ignore_ctl_error ? 0 : err;
                         val = ucontrol->value.integer.value[cnt];
                         val = get_abs_value(cval, val);
                         if (oval != val) {
-                                set_cur_mix_value(cval, c + 1, cnt, val);
+                                snd_usb_set_cur_mix_value(cval, c + 1, cnt, val);
                                 changed = 1;
                         }
                         cnt++;
                 }
         } else {
                 /* master channel */
-                err = get_cur_mix_value(cval, 0, 0, &oval);
+                err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval);
                 if (err < 0)
                         return cval->mixer->ignore_ctl_error ? 0 : err;
                 val = ucontrol->value.integer.value[0];
                 val = get_abs_value(cval, val);
                 if (val != oval) {
-                        set_cur_mix_value(cval, 0, 0, val);
+                        snd_usb_set_cur_mix_value(cval, 0, 0, val);
                         changed = 1;
                 }
         }
@@ -1250,7 +1250,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
 
         /*
          * If all channels in the mask are marked read-only, make the control
-         * read-only. set_cur_mix_value() will check the mask again and won't
+         * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't
          * issue write commands to read-only channels.
          */
         if (cval->channels == readonly_mask)
@@ -1263,7 +1263,7 @@ static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
                 kfree(cval);
                 return;
         }
-        kctl->private_free = usb_mixer_elem_free;
+        kctl->private_free = snd_usb_mixer_elem_free;
 
         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
         mapped_name = len != 0;
@@ -1546,7 +1546,7 @@ static void build_mixer_unit_ctl(struct mixer_build *state,
                 kfree(cval);
                 return;
         }
-        kctl->private_free = usb_mixer_elem_free;
+        kctl->private_free = snd_usb_mixer_elem_free;
 
         len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
         if (!len)
@@ -1846,7 +1846,7 @@ static int build_audio_procunit(struct mixer_build *state, int unitid,
                         kfree(cval);
                         return -ENOMEM;
                 }
-                kctl->private_free = usb_mixer_elem_free;
+                kctl->private_free = snd_usb_mixer_elem_free;
 
                 if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) {
                         /* nothing */ ;
@@ -2526,7 +2526,7 @@ static int restore_mixer_value(struct usb_mixer_elem_info *cval)
                         if (!(cval->cmask & (1 << c)))
                                 continue;
                         if (cval->cached & (1 << c)) {
-                                err = set_cur_mix_value(cval, c + 1, idx,
+                                err = snd_usb_set_cur_mix_value(cval, c + 1, idx,
                                                         cval->cache_val[idx]);
                                 if (err < 0)
                                         return err;
@@ -2536,7 +2536,7 @@ static int restore_mixer_value(struct usb_mixer_elem_info *cval)
         } else {
                 /* master */
                 if (cval->cached) {
-                        err = set_cur_mix_value(cval, 0, 0, *cval->cache_val);
+                        err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val);
                         if (err < 0)
                                 return err;
                 }
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index 7423f998cfb5..2478a844a322 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -76,4 +76,12 @@ int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer);
 int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume);
 #endif
 
+int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
+                             int index, int value);
+
+int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
+                             int channel, int index, int *value);
+
+extern void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl);
+
 #endif /* __USBMIXER_H */
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 45203168ac6d..b8b1f48c1f50 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -52,13 +52,6 @@ struct std_mono_table {
         snd_kcontrol_tlv_rw_t *tlv_callback;
 };
 
-/* private_free callback */
-static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
-{
-        kfree(kctl->private_data);
-        kctl->private_data = NULL;
-}
-
 /* This function allows for the creation of standard UAC controls.
  * See the quirks for M-Audio FTUs or Ebox-44.
  * If you don't want to set a TLV callback pass NULL.
@@ -108,7 +101,7 @@ static int snd_create_std_mono_ctl_offset(struct usb_mixer_interface *mixer,
 
         /* Set name */
         snprintf(kctl->id.name, sizeof(kctl->id.name), name);
-        kctl->private_free = usb_mixer_elem_free;
+        kctl->private_free = snd_usb_mixer_elem_free;
 
         /* set TLV */
         if (tlv_callback) {