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authorDaniel Drake <dsd@gentoo.org>2007-05-07 09:27:05 +0200
committerJaroslav Kysela <perex@suse.cz>2007-05-11 16:56:17 +0200
commita91214589e6527b18f52bc0b31253f9dfb4665e6 (patch)
tree45d6adab7f094fa62b05de5c046325a03c0b68c4 /sound/usb
parentd427c77eb2484c37d76b8e157e2b0b82c9b03062 (diff)
downloadlinux-linaro-a91214589e6527b18f52bc0b31253f9dfb4665e6.tar.gz
[ALSA] usb-audio: explicitly match Logitech QuickCam
Commit 93c8bf45e083b89dffe3a708363c15c1b220c723 modified the USB device matching behaviour to ignore interface class matches if the device class is vendor-specific. This patch adds explicit ID matches for Logitech QuickCam devices, which have a vendor specific device class (but standards-compliant audio interfaces). This fixes a 2.6.20 regression where the audio component of these devices was no longer usable. http://bugs.gentoo.org/show_bug.cgi?id=175715 https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/93822 https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3040 Based on a patch from sergiom Signed-off-by: Daniel Drake <dsd@gentoo.org> Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/usbquirks.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/usb/usbquirks.h b/sound/usb/usbquirks.h
index 858262068f4..8fcbe93b258 100644
--- a/sound/usb/usbquirks.h
+++ b/sound/usb/usbquirks.h
@@ -40,6 +40,29 @@
.bInterfaceClass = USB_CLASS_VENDOR_SPEC
/*
+ * Logitech QuickCam: bDeviceClass is vendor-specific, so generic interface
+ * class matches do not take effect without an explicit ID match.
+ */
+{
+ .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
+ USB_DEVICE_ID_MATCH_INT_CLASS |
+ USB_DEVICE_ID_MATCH_INT_SUBCLASS,
+ .idVendor = 0x046d,
+ .idProduct = 0x08f0,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL
+},
+{
+ .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
+ USB_DEVICE_ID_MATCH_INT_CLASS |
+ USB_DEVICE_ID_MATCH_INT_SUBCLASS,
+ .idVendor = 0x046d,
+ .idProduct = 0x08f6,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL
+},
+
+/*
* Yamaha devices
*/