diff options
| -rw-r--r-- | sound/usb/mixer_scarlett_gen2.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c index 7647b3428093..dde008ea21d7 100644 --- a/sound/usb/mixer_scarlett_gen2.c +++ b/sound/usb/mixer_scarlett_gen2.c @@ -161,10 +161,8 @@ static const u16 scarlett2_mixer_values[SCARLETT2_MIXER_VALUE_COUNT] = { */ #define SCARLETT2_MUX_MAX 64 -/* Number of meters: - * 18 inputs, 20 outputs, 18 matrix inputs - */ -#define SCARLETT2_NUM_METERS 56 +/* Maximum number of meters (sum of output port counts) */ +#define SCARLETT2_MAX_METERS 56 /* Hardware port types: * - None (no input to mux) @@ -1097,26 +1095,26 @@ static int scarlett2_usb_set_mux(struct usb_mixer_interface *mixer) /* Send USB message to get meter levels */ static int scarlett2_usb_get_meter_levels(struct usb_mixer_interface *mixer, - u16 *levels) + u16 num_meters, u16 *levels) { struct { __le16 pad; __le16 num_meters; __le32 magic; } __packed req; - u32 resp[SCARLETT2_NUM_METERS]; + u32 resp[SCARLETT2_MAX_METERS]; int i, err; req.pad = 0; - req.num_meters = cpu_to_le16(SCARLETT2_NUM_METERS); + req.num_meters = cpu_to_le16(num_meters); req.magic = cpu_to_le32(SCARLETT2_USB_METER_LEVELS_GET_MAGIC); err = scarlett2_usb(mixer, SCARLETT2_USB_GET_METER, - &req, sizeof(req), resp, sizeof(resp)); + &req, sizeof(req), resp, num_meters * sizeof(u32)); if (err < 0) return err; /* copy, convert to u16 */ - for (i = 0; i < SCARLETT2_NUM_METERS; i++) + for (i = 0; i < num_meters; i++) levels[i] = resp[i]; return 0; @@ -2053,10 +2051,11 @@ static int scarlett2_meter_ctl_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *elem = kctl->private_data; - u16 meter_levels[SCARLETT2_NUM_METERS]; + u16 meter_levels[SCARLETT2_MAX_METERS]; int i, err; - err = scarlett2_usb_get_meter_levels(elem->head.mixer, meter_levels); + err = scarlett2_usb_get_meter_levels(elem->head.mixer, elem->channels, + meter_levels); if (err < 0) return err; @@ -2076,8 +2075,10 @@ static const struct snd_kcontrol_new scarlett2_meter_ctl = { static int scarlett2_add_meter_ctl(struct usb_mixer_interface *mixer) { + struct scarlett2_data *private = mixer->private_data; + return scarlett2_add_new_ctl(mixer, &scarlett2_meter_ctl, - 0, SCARLETT2_NUM_METERS, + 0, private->num_mux_dsts, "Level Meter", NULL); } |