Hi,
this is an experimental patchset to add a new option, quirk_alias, to snd-usb-audio driver. It allows to use the existing quirk for the given vendor:product id pair matching with the new device. Passing like: quirk_alias=1234abcd:5678beef will make the driver applying the quirk for 5678:beef against to the new device 1234:abcd.
Obviously, this is for helping to find a workaround for a new device that may need the same / similar quirk for the previous models. Then you can apply the quirk without recompiling the kernel driver with a manual patch.
Takashi
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Takashi Iwai (3): ALSA: usb-audio: Refer to chip->usb_id for quirks and MIDI creation ALSA: usb-audio: Add quirk_alias option ALSA: doc: Update option descriptions for snd-usb-audio
Documentation/sound/alsa/ALSA-Configuration.txt | 9 ++++ sound/usb/card.c | 56 +++++++++++++++++++++++-- sound/usb/midi.c | 15 ++++--- sound/usb/midi.h | 14 ++++++- sound/usb/quirks.c | 34 ++++++++------- sound/usb/quirks.h | 3 +- 6 files changed, 105 insertions(+), 26 deletions(-)