ALSA: usb-audio: Add resume support for Native Instruments controls
The changes at this time are a bit more wider than previous ones.
Firstly, the NI controls didn't cache the values, so I had to
implement the caching. It's stored in bit 24 of private_value.
In addition to that, the initial values have to be read from
registers.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index f7ad207..e11b4f3 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -742,64 +742,68 @@
#define _MAKE_NI_CONTROL(bRequest,wIndex) ((bRequest) << 16 | (wIndex))
+static int snd_ni_control_init_val(struct usb_mixer_interface *mixer,
+ struct snd_kcontrol *kctl)
+{
+ struct usb_device *dev = mixer->chip->dev;
+ unsigned int pval = kctl->private_value;
+ u8 value;
+ int err;
+
+ err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
+ (pval >> 16) & 0xff,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
+ 0, pval & 0xffff, &value, 1);
+ if (err < 0) {
+ dev_err(&dev->dev,
+ "unable to issue vendor read request (ret = %d)", err);
+ return err;
+ }
+
+ kctl->private_value |= (value << 24);
+ return 0;
+}
+
static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
- struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
- struct usb_device *dev = mixer->chip->dev;
- u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
- u16 wIndex = kcontrol->private_value & 0xffff;
- u8 tmp;
- int ret;
-
- down_read(&mixer->chip->shutdown_rwsem);
- if (mixer->chip->shutdown)
- ret = -ENODEV;
- else
- ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0, wIndex,
- &tmp, sizeof(tmp));
- up_read(&mixer->chip->shutdown_rwsem);
-
- if (ret < 0) {
- dev_err(&dev->dev,
- "unable to issue vendor read request (ret = %d)", ret);
- return ret;
- }
-
- ucontrol->value.integer.value[0] = tmp;
-
+ ucontrol->value.integer.value[0] = kcontrol->private_value >> 24;
return 0;
}
+static int snd_ni_update_cur_val(struct usb_mixer_elem_list *list)
+{
+ struct snd_usb_audio *chip = list->mixer->chip;
+ unsigned int pval = list->kctl->private_value;
+ int err;
+
+ down_read(&chip->shutdown_rwsem);
+ if (chip->shutdown)
+ err = -ENODEV;
+ else
+ err = usb_control_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0),
+ (pval >> 16) & 0xff,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+ pval >> 24, pval & 0xffff, NULL, 0, 1000);
+ up_read(&chip->shutdown_rwsem);
+ return err;
+}
+
static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
- struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
- struct usb_device *dev = mixer->chip->dev;
- u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
- u16 wIndex = kcontrol->private_value & 0xffff;
- u16 wValue = ucontrol->value.integer.value[0];
- int ret;
+ struct usb_mixer_elem_list *list = snd_kcontrol_chip(kcontrol);
+ u8 oldval = (kcontrol->private_value >> 24) & 0xff;
+ u8 newval = ucontrol->value.integer.value[0];
+ int err;
- down_read(&mixer->chip->shutdown_rwsem);
- if (mixer->chip->shutdown)
- ret = -ENODEV;
- else
- ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
- USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
- wValue, wIndex,
- NULL, 0, 1000);
- up_read(&mixer->chip->shutdown_rwsem);
+ if (oldval == newval)
+ return 0;
- if (ret < 0) {
- dev_err(&dev->dev,
- "unable to issue vendor write request (ret = %d)", ret);
- return ret;
- }
-
- return 0;
+ kcontrol->private_value &= ~(0xff << 24);
+ kcontrol->private_value |= newval;
+ err = snd_ni_update_cur_val(list);
+ return err < 0 ? err : 1;
}
static struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
@@ -870,16 +874,17 @@
};
for (i = 0; i < count; i++) {
- struct snd_kcontrol *c;
+ struct usb_mixer_elem_list *list;
template.name = kc[i].name;
template.private_value = kc[i].private_value;
- c = snd_ctl_new1(&template, mixer);
- err = snd_ctl_add(mixer->chip->card, c);
-
+ err = add_single_ctl_with_resume(mixer, 0,
+ snd_ni_update_cur_val,
+ &template, &list);
if (err < 0)
break;
+ snd_ni_control_init_val(mixer, list->kctl);
}
return err;