Re: [PATCH v2] ALSA: usb-audio: add quirk for Novation UltraNova (1235:0011)

[Takashi Iwai]

On Fri, 23 Oct 2026 14:25:11 +0200,
rainey.shawn+kaudio@xxxxxxxxx wrote:
> 
> From: Shawn Rainey <rainey.shawn+kaudio@xxxxxxxxx>
> 
> The device reports vendor-specific class on all interfaces, so the
> standard parser rejects it and no card is created.  Add a composite
> quirk with fixed audio and raw-MIDI layouts.  The id table entry
> matches interface 0 only so that the vendor control interfaces (2/3)
> are left unbound for userspace access.
> 
> The endpoints advertise no synchronization and the device provides no
> feedback; both streams are locked to the USB SOF.  The playback entry
> is marked USB_ENDPOINT_SYNC_SYNC so that generic sync-EP detection
> does not pair the capture data endpoint (0x82) as implicit feedback
> for the output stream; the capture entry needs no override, as its
> .ep_idx = 1 already keeps it out of sync-EP detection.
> 
> Verified on hardware: audio duplex at both supported rates, raw MIDI
> in/out, and complete patch dumps as SysEx on the MIDI endpoints.
> 
> Signed-off-by: Shawn Rainey <rainey.shawn+kaudio@xxxxxxxxx>

Applied now.  Thanks.


Takashi