ALSA: usb: initial USB Audio Device Class 3.0 support
Recently released USB Audio Class 3.0 specification
introduces many significant changes comparing to
previous versions, like
- new Power Domains, support for LPM/L1
- new Cluster descriptor
- changed layout of all class-specific descriptors
- new High Capability descriptors
- New class-specific String descriptors
- new and removed units
- additional sources for interrupts
- removed Type II Audio Data Formats
- ... and many other things (check spec)
It also provides backward compatibility through
multiple configurations, as well as requires
mandatory support for BADD (Basic Audio Device
Definition) on each ADC3.0 compliant device
This patch adds initial support of UAC3 specification
that is enough for Generic I/O Profile (BAOF, BAIF)
device support from BADD document.
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 8018d56..4a1c6bb 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -7,6 +7,7 @@
* Alan Cox (alan@lxorguk.ukuu.org.uk)
* Thomas Sailer (sailer@ife.ee.ethz.ch)
*
+ * Audio Class 3.0 support by Ruslan Bilovol <ruslan.bilovol@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -44,6 +45,7 @@
#include <linux/mutex.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
#include <linux/module.h>
#include <sound/control.h>
@@ -281,7 +283,8 @@
break;
}
- case UAC_VERSION_2: {
+ case UAC_VERSION_2:
+ case UAC_VERSION_3: {
struct usb_interface_assoc_descriptor *assoc =
usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
@@ -301,7 +304,7 @@
}
if (!assoc) {
- dev_err(&dev->dev, "Audio class v2 interfaces need an interface association\n");
+ dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n");
return -EINVAL;
}