diff options
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/mixer_scarlett2.c | 123 |
1 files changed, 113 insertions, 10 deletions
diff --git a/sound/usb/mixer_scarlett2.c b/sound/usb/mixer_scarlett2.c index e1b7398fae33..6266f5d3fab8 100644 --- a/sound/usb/mixer_scarlett2.c +++ b/sound/usb/mixer_scarlett2.c @@ -2391,6 +2391,10 @@ static int scarlett2_add_sync_ctl(struct usb_mixer_interface *mixer) /*** Autogain Switch and Status Controls ***/ +/* Forward declarations as phantom power and autogain can disable each other */ +static int scarlett2_check_input_phantom_updated(struct usb_mixer_interface *); +static int scarlett2_phantom_is_switching(struct scarlett2_data *, int); + /* Set the access mode of a control to read-only (val = 0) or * read-write (val = 1). */ @@ -2557,6 +2561,27 @@ static int scarlett2_check_put_during_autogain( return 0; } +static int scarlett2_autogain_switch_ctl_info( + struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct usb_mixer_interface *mixer = elem->head.mixer; + struct scarlett2_data *private = mixer->private_data; + int err; + + mutex_lock(&private->data_mutex); + + err = scarlett2_check_input_phantom_updated(mixer); + if (err < 0) + goto unlock; + + err = snd_ctl_boolean_mono_info(kctl, uinfo); + +unlock: + mutex_unlock(&private->data_mutex); + return err; +} + static int scarlett2_autogain_switch_ctl_get( struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol) { @@ -2619,7 +2644,7 @@ static int scarlett2_autogain_switch_ctl_put( struct scarlett2_data *private = mixer->private_data; int index = elem->control; - int oval, val, err = 0; + int oval, val, err; mutex_lock(&private->data_mutex); @@ -2628,6 +2653,15 @@ static int scarlett2_autogain_switch_ctl_put( goto unlock; } + err = scarlett2_check_input_phantom_updated(mixer); + if (err < 0) + goto unlock; + + if (scarlett2_phantom_is_switching(private, index)) { + err = -EPERM; + goto unlock; + } + oval = private->autogain_switch[index]; val = !!ucontrol->value.integer.value[0]; @@ -2664,7 +2698,7 @@ static int scarlett2_autogain_status_ctl_info( static const struct snd_kcontrol_new scarlett2_autogain_switch_ctl = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "", - .info = snd_ctl_boolean_mono_info, + .info = scarlett2_autogain_switch_ctl_info, .get = scarlett2_autogain_switch_ctl_get, .put = scarlett2_autogain_switch_ctl_put }; @@ -3983,13 +4017,74 @@ static int scarlett2_update_input_phantom(struct usb_mixer_interface *mixer) return 0; } +/* Check if phantom power on the given input is currently changing state */ +static int scarlett2_phantom_is_switching( + struct scarlett2_data *private, int line_num) +{ + const struct scarlett2_device_info *info = private->info; + int index = line_num / info->inputs_per_phantom; + + return !!(private->phantom_switch[index] & 0x02); +} + +/* Update autogain controls' access mode when phantom power changes state */ +static void scarlett2_phantom_update_access(struct usb_mixer_interface *mixer) +{ + struct scarlett2_data *private = mixer->private_data; + const struct scarlett2_device_info *info = private->info; + int i; + + /* Disable autogain controls if phantom power is changing state */ + for (i = 0; i < info->gain_input_count; i++) { + int val = !scarlett2_phantom_is_switching(private, i); + + scarlett2_set_ctl_access(private->autogain_ctls[i], val); + } +} + +/* Notify of access mode change for autogain which can't be enabled + * while phantom power is changing. + */ +static void scarlett2_phantom_notify_access(struct usb_mixer_interface *mixer) +{ + struct snd_card *card = mixer->chip->card; + struct scarlett2_data *private = mixer->private_data; + const struct scarlett2_device_info *info = private->info; + int i; + + for (i = 0; i < info->gain_input_count; i++) + snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_INFO, + &private->autogain_ctls[i]->id); +} + +/* Call scarlett2_update_input_phantom() and + * scarlett2_phantom_update_access() if input_phantom_updated is set. + */ +static int scarlett2_check_input_phantom_updated( + struct usb_mixer_interface *mixer) +{ + struct scarlett2_data *private = mixer->private_data; + int err; + + if (!private->input_phantom_updated) + return 0; + + err = scarlett2_update_input_phantom(mixer); + if (err < 0) + return err; + + scarlett2_phantom_update_access(mixer); + + return 0; +} + static int scarlett2_phantom_ctl_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *elem = kctl->private_data; struct usb_mixer_interface *mixer = elem->head.mixer; struct scarlett2_data *private = mixer->private_data; - int err = 0; + int err; mutex_lock(&private->data_mutex); @@ -3998,11 +4093,10 @@ static int scarlett2_phantom_ctl_get(struct snd_kcontrol *kctl, goto unlock; } - if (private->input_phantom_updated) { - err = scarlett2_update_input_phantom(mixer); - if (err < 0) - goto unlock; - } + err = scarlett2_check_input_phantom_updated(mixer); + if (err < 0) + goto unlock; + ucontrol->value.integer.value[0] = scarlett2_decode_muteable( private->phantom_switch[elem->control]); @@ -4051,6 +4145,9 @@ static int scarlett2_phantom_ctl_put(struct snd_kcontrol *kctl, if (err == 0) err = 1; + scarlett2_phantom_update_access(mixer); + scarlett2_phantom_notify_access(mixer); + unlock: mutex_unlock(&private->data_mutex); return err; @@ -5912,6 +6009,8 @@ static void scarlett2_notify_input_phantom(struct usb_mixer_interface *mixer) for (i = 0; i < info->phantom_count; i++) snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &private->phantom_ctls[i]->id); + + scarlett2_phantom_notify_access(mixer); } /* Notify on "input other" change (level/pad/air/phantom) */ @@ -6231,9 +6330,13 @@ static int snd_scarlett2_controls_create( if (err < 0) return err; - /* Set the access mode of controls disabled during autogain */ - if (private->info->gain_input_count) + /* Set the access mode of controls disabled during + * autogain/phantom power switching. + */ + if (private->info->gain_input_count) { scarlett2_autogain_update_access(mixer); + scarlett2_phantom_update_access(mixer); + } /* Set up the interrupt polling */ err = scarlett2_init_notify(mixer); |