diff options
| author | Daniel Drake <dsd@gentoo.org> | 2007-05-07 11:27:05 +0400 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2007-05-11 18:56:17 +0400 |
| commit | a91214589e6527b18f52bc0b31253f9dfb4665e6 (patch) | |
| tree | 45d6adab7f094fa62b05de5c046325a03c0b68c4 /sound/usb | |
| parent | d427c77eb2484c37d76b8e157e2b0b82c9b03062 (diff) | |
| download | linux-a91214589e6527b18f52bc0b31253f9dfb4665e6.tar.xz | |
[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.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/usb/usbquirks.h b/sound/usb/usbquirks.h index 858262068f4f..8fcbe93b2589 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 */ |