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ALSA: scarlett2: Add power status control

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Add a control to retrieve the power status from the interface
(bus-powered, external-powered, or insufficient power).

Mark the new scarlett2_notify_power_status() function with
__always_unused until it gets used when the Gen 4 notification
callback function arrays are added.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/d9806bc41adc45b1c19749562fec7765ba24351d.1703612638.git.g@b4.vu
This commit is contained in:
Geoffrey D. Bennett 2023-12-27 04:38:02 +10:30 committed by Takashi Iwai
parent 882a2a36c4
commit d7cfa2fdfc
1 changed files with 123 additions and 0 deletions
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123
sound/usb/mixer_scarlett2.c
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@ -278,6 +278,14 @@ enum {
SCARLETT2_AUTOGAIN_STATUS_COUNT
};
/* Power Status Values */
enum {
SCARLETT2_POWER_STATUS_EXT,
SCARLETT2_POWER_STATUS_BUS,
SCARLETT2_POWER_STATUS_FAIL,
SCARLETT2_POWER_STATUS_COUNT
};
/* Notification callback functions */
struct scarlett2_notification {
u32 mask;
@ -334,6 +342,8 @@ enum {
SCARLETT2_CONFIG_SAFE_SWITCH,
SCARLETT2_CONFIG_INPUT_SELECT_SWITCH,
SCARLETT2_CONFIG_INPUT_LINK_SWITCH,
SCARLETT2_CONFIG_POWER_EXT,
SCARLETT2_CONFIG_POWER_STATUS,
SCARLETT2_CONFIG_COUNT
};
@ -751,6 +761,7 @@ struct scarlett2_data {
u8 direct_monitor_updated;
u8 mux_updated;
u8 speaker_switching_switched;
u8 power_status_updated;
u8 sync;
u8 master_vol;
u8 vol[SCARLETT2_ANALOGUE_MAX];
@ -774,6 +785,7 @@ struct scarlett2_data {
u8 talkback_map[SCARLETT2_OUTPUT_MIX_MAX];
u8 msd_switch;
u8 standalone_switch;
u8 power_status;
u8 meter_level_map[SCARLETT2_MAX_METERS];
struct snd_kcontrol *sync_ctl;
struct snd_kcontrol *master_vol_ctl;
@ -795,6 +807,7 @@ struct scarlett2_data {
struct snd_kcontrol *direct_monitor_ctl;
struct snd_kcontrol *speaker_switching_ctl;
struct snd_kcontrol *talkback_ctl;
struct snd_kcontrol *power_status_ctl;
u8 mux[SCARLETT2_MUX_MAX];
u8 mix[SCARLETT2_MIX_MAX];
};
@ -5526,6 +5539,91 @@ static int scarlett2_add_standalone_ctl(struct usb_mixer_interface *mixer)
0, 1, "Standalone Switch", NULL);
}
/*** Power Status ***/
static int scarlett2_update_power_status(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
int err;
u8 power_ext;
u8 power_status;
private->power_status_updated = 0;
err = scarlett2_usb_get_config(mixer, SCARLETT2_CONFIG_POWER_EXT,
1, &power_ext);
if (err < 0)
return err;
err = scarlett2_usb_get_config(mixer, SCARLETT2_CONFIG_POWER_STATUS,
1, &power_status);
if (err < 0)
return err;
if (power_status > 1)
private->power_status = SCARLETT2_POWER_STATUS_FAIL;
else if (power_ext)
private->power_status = SCARLETT2_POWER_STATUS_EXT;
else
private->power_status = SCARLETT2_POWER_STATUS_BUS;
return 0;
}
static int scarlett2_power_status_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;
mutex_lock(&private->data_mutex);
if (private->power_status_updated) {
err = scarlett2_update_power_status(mixer);
if (err < 0)
goto unlock;
}
ucontrol->value.integer.value[0] = private->power_status;
unlock:
mutex_unlock(&private->data_mutex);
return err;
}
static int scarlett2_power_status_ctl_info(
struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo)
{
static const char *const values[3] = {
"External", "Bus", "Fail"
};
return snd_ctl_enum_info(uinfo, 1, 3, values);
}
static const struct snd_kcontrol_new scarlett2_power_status_ctl = {
.iface = SNDRV_CTL_ELEM_IFACE_CARD,
.access = SNDRV_CTL_ELEM_ACCESS_READ,
.name = "",
.info = scarlett2_power_status_ctl_info,
.get = scarlett2_power_status_ctl_get,
};
static int scarlett2_add_power_status_ctl(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
if (!scarlett2_has_config_item(private,
SCARLETT2_CONFIG_POWER_EXT))
return 0;
/* Add power status control */
return scarlett2_add_new_ctl(mixer, &scarlett2_power_status_ctl,
0, 1, "Power Status Card Enum",
&private->power_status_ctl);
}
/*** Cleanup/Suspend Callbacks ***/
static void scarlett2_private_free(struct usb_mixer_interface *mixer)
@ -5817,6 +5915,13 @@ static int scarlett2_read_configs(struct usb_mixer_interface *mixer)
return err;
}
if (scarlett2_has_config_item(private,
SCARLETT2_CONFIG_POWER_EXT)) {
err = scarlett2_update_power_status(mixer);
if (err < 0)
return err;
}
err = scarlett2_update_sync(mixer);
if (err < 0)
return err;
@ -6153,6 +6258,19 @@ static void scarlett2_notify_direct_monitor(struct usb_mixer_interface *mixer)
&private->direct_monitor_ctl->id);
}
/* Notify on power change */
static __always_unused void scarlett2_notify_power_status(
struct usb_mixer_interface *mixer)
{
struct snd_card *card = mixer->chip->card;
struct scarlett2_data *private = mixer->private_data;
private->power_status_updated = 1;
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->power_status_ctl->id);
}
/* Interrupt callback */
static void scarlett2_notify(struct urb *urb)
{
@ -6330,6 +6448,11 @@ static int snd_scarlett2_controls_create(
if (err < 0)
return err;
/* Create the power status control */
err = scarlett2_add_power_status_ctl(mixer);
if (err < 0)
return err;
/* Set the access mode of controls disabled during
* autogain/phantom power switching.
*/