Re: [PATCH] ALSA: usb-audio: keep MIDI input running for Roland TD-11

[Takashi Iwai]

On Sat, 12 Sep 2026 05:28:42 +0200,
Nicholas Hobson wrote:
> 
> From cbb4e446c3278aa99b34e622ac7ccef3e6d98d5b Mon Sep 17 00:00:00 2001
> From: Nicholas Hobson <nicholas.hobson@xxxxxxxxxxx>
> Date: Fri, 11 Sep 2026 21:58:09 -0400
> Subject: [PATCH] ALSA: usb-audio: keep MIDI input running for Roland TD-11

(Those lines look superfluous.  Please avoid it at the next time.)

> The TD-11 hands MIDI handling off to the host once connected via
> USB. If no MIDI input port is opened on the host, the device itself
> becomes unusable as a standalone instrument until its input is
> serviced, independent of anything happening on the computer.
> 
> Add a per-device keep_input_running flag, set for the TD-11 in
> snd_usbmidi_detect_roland(), and check it alongside the existing
> opened[1] check in snd_usbmidi_input_start()/snd_usbmidi_input_stop()
> so that input is started at device creation and never stopped for
> these devices, regardless of whether a client has the input port
> open.
> 
> Signed-off-by: Nicholas Hobson <nicholas.hobson@xxxxxxxxxxx>

Applied to for-next branch now.  Thanks.


Takashi