[openwrt/openwrt] kernel: sound: add support for MIDI 2.0 and UMP

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/4daff067d7c2197f9fd7b21577ff7ddcb927063b

commit 4daff067d7c2197f9fd7b21577ff7ddcb927063b
Author: Florian Bomers <github at bome.com>
AuthorDate: Mon Nov 10 18:39:34 2025 +0100

    kernel: sound: add support for MIDI 2.0 and UMP
    
    New Packages / build options:
    * sound-midi2: enable MIDI 2.0 / UMP in ALSA MIDI
    * sound-midi2-seq: enable MIDI 2.0 / UMP in ALSA sequencer
    * sound-midi2-usb: enable USB MIDI 2.0 support
    * sound-dynamic-minors: allow more than 8 MIDI devices
    More info about ALSA MIDI 2.0:
     https://docs.kernel.org/6.12/sound/designs/midi-2.0.html
    More info about MIDI 2.0:
     https://midi.org/midi-2-0
    
    Signed-off-by: Florian Bomers <github at bome.com>
    Link: https://github.com/openwrt/openwrt/pull/20727
    Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 package/kernel/linux/modules/sound.mk | 52 +++++++++++++++++++++++++++++++++++
 package/kernel/linux/modules/usb.mk   |  2 +-
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/package/kernel/linux/modules/sound.mk b/package/kernel/linux/modules/sound.mk
index af5aadd360..5645d31878 100644
--- a/package/kernel/linux/modules/sound.mk
+++ b/package/kernel/linux/modules/sound.mk
@@ -604,3 +604,55 @@ define KernelPackage/sound-hda-intel/description
 endef
 
 $(eval $(call KernelPackage,sound-hda-intel))
+
+
+define KernelPackage/sound-midi2
+  TITLE:=MIDI 2.0 and UMP Support
+  KCONFIG:= \
+	CONFIG_SND_UMP=y  \
+	CONFIG_SND_UMP_LEGACY_RAWMIDI=y
+  FILES:=$(LINUX_DIR)/sound/core/snd-ump.ko
+  AUTOLOAD:=$(call AutoProbe,snd-ump)
+  $(call AddDepends/sound)
+endef
+
+define KernelPackage/sound-midi2/description
+ Kernel module for MIDI 2.0: sequencer, rawmidi, and USB-MIDI 2.0 support.
+endef
+
+$(eval $(call KernelPackage,sound-midi2))
+
+define KernelPackage/sound-midi2-seq
+  TITLE:=MIDI 2.0 and UMP Support for Sequencer
+  KCONFIG:= \
+	CONFIG_SND_SEQ_UMP=y \
+	CONFIG_SND_SEQ_UMP_CLIENT=y
+  DEPENDS:=+kmod-sound-midi2 +kmod-sound-seq
+  $(call AddDepends/sound)
+endef
+
+$(eval $(call KernelPackage,sound-midi2-seq))
+
+
+define KernelPackage/sound-midi2-usb
+  TITLE:=MIDI 2.0 and UMP Support for USB-MIDI
+  KCONFIG:=CONFIG_SND_USB_AUDIO_MIDI_V2=y
+  DEPENDS:=+kmod-sound-midi2 +kmod-usb-audio
+  $(call AddDepends/sound)
+endef
+
+$(eval $(call KernelPackage,sound-midi2-usb))
+
+
+define KernelPackage/sound-dynamic-minors
+  TITLE:=Support more than 8 audio and MIDI devices
+  KCONFIG:=CONFIG_SND_DYNAMIC_MINORS=y
+  $(call AddDepends/sound)
+endef
+
+define KernelPackage/sound-dynamic-minors/description
+ Kernel module for dynamic minor device support.
+ Required for using more than 8 audio and MIDI devices.
+endef
+
+$(eval $(call KernelPackage,sound-dynamic-minors))
diff --git a/package/kernel/linux/modules/usb.mk b/package/kernel/linux/modules/usb.mk
index 121e3aed51..5c67669139 100644
--- a/package/kernel/linux/modules/usb.mk
+++ b/package/kernel/linux/modules/usb.mk
@@ -616,7 +616,7 @@ define KernelPackage/usb-audio
 	CONFIG_SND_USB_AUDIO
   $(call AddDepends/usb)
   $(call AddDepends/sound)
-  DEPENDS+=+kmod-media-controller
+  DEPENDS+=+kmod-media-controller +PACKAGE_kmod-sound-midi2-usb:kmod-sound-midi2
   FILES:= \
 	$(LINUX_DIR)/sound/usb/snd-usbmidi-lib.ko \
 	$(LINUX_DIR)/sound/usb/snd-usb-audio.ko