ALSA: usb-audio: simplify control interface access
As the control interface is now carried in struct snd_usb_audio, we can
simplify the API a little and also drop the private ctrlif field from
struct usb_mixer_interface.
Also remove a left-over function prototype in pcm.h.
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 7279d61..66bd157 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -121,7 +121,6 @@
}
static int __uac_clock_find_source(struct snd_usb_audio *chip,
- struct usb_host_interface *host_iface,
int entity_id, unsigned long *visited)
{
struct uac_clock_source_descriptor *source;
@@ -138,11 +137,11 @@
}
/* first, see if the ID we're looking for is a clock source already */
- source = snd_usb_find_clock_source(host_iface, entity_id);
+ source = snd_usb_find_clock_source(chip->ctrl_intf, entity_id);
if (source)
return source->bClockID;
- selector = snd_usb_find_clock_selector(host_iface, entity_id);
+ selector = snd_usb_find_clock_selector(chip->ctrl_intf, entity_id);
if (selector) {
int ret;
@@ -162,16 +161,15 @@
return -EINVAL;
}
- return __uac_clock_find_source(chip, host_iface,
- selector->baCSourceID[ret-1],
+ return __uac_clock_find_source(chip, selector->baCSourceID[ret-1],
visited);
}
/* FIXME: multipliers only act as pass-thru element for now */
- multiplier = snd_usb_find_clock_multiplier(host_iface, entity_id);
+ multiplier = snd_usb_find_clock_multiplier(chip->ctrl_intf, entity_id);
if (multiplier)
- return __uac_clock_find_source(chip, host_iface,
- multiplier->bCSourceID, visited);
+ return __uac_clock_find_source(chip, multiplier->bCSourceID,
+ visited);
return -EINVAL;
}
@@ -187,13 +185,11 @@
*
* Returns the clock source UnitID (>=0) on success, or an error.
*/
-int snd_usb_clock_find_source(struct snd_usb_audio *chip,
- struct usb_host_interface *host_iface,
- int entity_id)
+int snd_usb_clock_find_source(struct snd_usb_audio *chip, int entity_id)
{
DECLARE_BITMAP(visited, 256);
memset(visited, 0, sizeof(visited));
- return __uac_clock_find_source(chip, host_iface, entity_id, visited);
+ return __uac_clock_find_source(chip, entity_id, visited);
}
static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
@@ -251,7 +247,7 @@
struct usb_device *dev = chip->dev;
unsigned char data[4];
int err, crate;
- int clock = snd_usb_clock_find_source(chip, chip->ctrl_intf, fmt->clock);
+ int clock = snd_usb_clock_find_source(chip, fmt->clock);
if (clock < 0)
return clock;