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ALSA: usb-audio: scarlett2: Add support for "input-other" notify 

Some models allow the level and pad settings to be controlled from the
front-panel of the device. For these, the device will send an
"input-other" notification to prompt the driver to re-read the status
of those settings.

Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Link: https://lore.kernel.org/r/06289a7697455e96b7dbdfd2d384d4b20f8df6e0.1624379707.git.g@b4.vu
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Geoffrey D. Bennett 2021-06-23 02:31:44 +09:30 committed by Takashi Iwai
parent 4be47798d7
commit a5b3612305
1 changed files with 73 additions and 26 deletions
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99
sound/usb/mixer_scarlett_gen2.c
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@ -318,6 +318,7 @@ struct scarlett2_data {
u16 scarlett2_seq;
u8 sync_updated;
u8 vol_updated;
u8 input_other_updated;
u8 sync;
u8 master_vol;
u8 vol[SCARLETT2_ANALOGUE_MAX];
@ -331,6 +332,8 @@ struct scarlett2_data {
struct snd_kcontrol *vol_ctls[SCARLETT2_ANALOGUE_MAX];
struct snd_kcontrol *mute_ctls[SCARLETT2_ANALOGUE_MAX];
struct snd_kcontrol *dim_mute_ctls[SCARLETT2_DIM_MUTE_COUNT];
struct snd_kcontrol *level_ctls[SCARLETT2_LEVEL_SWITCH_MAX];
struct snd_kcontrol *pad_ctls[SCARLETT2_PAD_SWITCH_MAX];
u8 mux[SCARLETT2_MUX_MAX];
u8 mix[SCARLETT2_INPUT_MIX_MAX * SCARLETT2_OUTPUT_MIX_MAX];
};
@ -723,9 +726,10 @@ static int scarlett2_get_port_start_num(
/*** USB Interactions ***/
/* Notifications from the interface */
#define SCARLETT2_USB_NOTIFY_SYNC 0x00000008
#define SCARLETT2_USB_NOTIFY_DIM_MUTE 0x00200000
#define SCARLETT2_USB_NOTIFY_MONITOR 0x00400000
#define SCARLETT2_USB_NOTIFY_SYNC 0x00000008
#define SCARLETT2_USB_NOTIFY_DIM_MUTE 0x00200000
#define SCARLETT2_USB_NOTIFY_MONITOR 0x00400000
#define SCARLETT2_USB_NOTIFY_INPUT_OTHER 0x00800000
/* Commands for sending/receiving requests/responses */
#define SCARLETT2_USB_CMD_INIT 0
@ -1745,6 +1749,32 @@ static const struct snd_kcontrol_new scarlett2_sw_hw_enum_ctl = {
/*** Line Level/Instrument Level Switch Controls ***/
static int scarlett2_update_input_other(struct usb_mixer_interface *mixer)
{
struct scarlett2_data *private = mixer->private_data;
const struct scarlett2_device_info *info = private->info;
private->input_other_updated = 0;
if (info->level_input_count) {
int err = scarlett2_usb_get_config(
mixer, SCARLETT2_CONFIG_LEVEL_SWITCH,
info->level_input_count, private->level_switch);
if (err < 0)
return err;
}
if (info->pad_input_count) {
int err = scarlett2_usb_get_config(
mixer, SCARLETT2_CONFIG_PAD_SWITCH,
info->pad_input_count, private->pad_switch);
if (err < 0)
return err;
}
return 0;
}
static int scarlett2_level_enum_ctl_info(struct snd_kcontrol *kctl,
struct snd_ctl_elem_info *uinfo)
{
@ -1759,10 +1789,16 @@ static int scarlett2_level_enum_ctl_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct scarlett2_data *private = elem->head.mixer->private_data;
struct usb_mixer_interface *mixer = elem->head.mixer;
struct scarlett2_data *private = mixer->private_data;
mutex_lock(&private->data_mutex);
if (private->input_other_updated)
scarlett2_update_input_other(mixer);
ucontrol->value.enumerated.item[0] =
private->level_switch[elem->control];
mutex_unlock(&private->data_mutex);
return 0;
}
@ -1811,10 +1847,16 @@ static int scarlett2_pad_ctl_get(struct snd_kcontrol *kctl,
struct snd_ctl_elem_value *ucontrol)
{
struct usb_mixer_elem_info *elem = kctl->private_data;
struct scarlett2_data *private = elem->head.mixer->private_data;
struct usb_mixer_interface *mixer = elem->head.mixer;
struct scarlett2_data *private = mixer->private_data;
mutex_lock(&private->data_mutex);
if (private->input_other_updated)
scarlett2_update_input_other(mixer);
ucontrol->value.integer.value[0] =
private->pad_switch[elem->control];
mutex_unlock(&private->data_mutex);
return 0;
}
@ -2025,7 +2067,7 @@ static int scarlett2_add_line_in_ctls(struct usb_mixer_interface *mixer)
for (i = 0; i < info->level_input_count; i++) {
snprintf(s, sizeof(s), fmt, i + 1, "Level", "Enum");
err = scarlett2_add_new_ctl(mixer, &scarlett2_level_enum_ctl,
i, 1, s, NULL);
i, 1, s, &private->level_ctls[i]);
if (err < 0)
return err;
}
@ -2034,7 +2076,7 @@ static int scarlett2_add_line_in_ctls(struct usb_mixer_interface *mixer)
for (i = 0; i < info->pad_input_count; i++) {
snprintf(s, sizeof(s), fmt, i + 1, "Pad", "Switch");
err = scarlett2_add_new_ctl(mixer, &scarlett2_pad_ctl,
i, 1, s, NULL);
i, 1, s, &private->pad_ctls[i]);
if (err < 0)
return err;
}
@ -2446,25 +2488,9 @@ static int scarlett2_read_configs(struct usb_mixer_interface *mixer)
struct scarlett2_usb_volume_status volume_status;
int err, i;
if (info->level_input_count) {
err = scarlett2_usb_get_config(
mixer,
SCARLETT2_CONFIG_LEVEL_SWITCH,
info->level_input_count,
private->level_switch);
if (err < 0)
return err;
}
if (info->pad_input_count) {
err = scarlett2_usb_get_config(
mixer,
SCARLETT2_CONFIG_PAD_SWITCH,
info->pad_input_count,
private->pad_switch);
if (err < 0)
return err;
}
err = scarlett2_update_input_other(mixer);
if (err < 0)
return err;
err = scarlett2_update_sync(mixer);
if (err < 0)
@ -2578,6 +2604,25 @@ static void scarlett2_notify_dim_mute(
&private->mute_ctls[i]->id);
}
/* Notify on "input other" change (level/pad) */
static void scarlett2_notify_input_other(
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;
private->input_other_updated = 1;
for (i = 0; i < info->level_input_count; i++)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->level_ctls[i]->id);
for (i = 0; i < info->pad_input_count; i++)
snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
&private->pad_ctls[i]->id);
}
/* Interrupt callback */
static void scarlett2_notify(struct urb *urb)
{
@ -2596,6 +2641,8 @@ static void scarlett2_notify(struct urb *urb)
scarlett2_notify_monitor(mixer);
if (data & SCARLETT2_USB_NOTIFY_DIM_MUTE)
scarlett2_notify_dim_mute(mixer);
if (data & SCARLETT2_USB_NOTIFY_INPUT_OTHER)
scarlett2_notify_input_other(mixer);
requeue:
if (ustatus != -ENOENT &&