diff --git a/sound/core/seq/Kconfig b/sound/core/seq/Kconfig
index c69d8beb09fa..f8336134153e 100644
--- a/sound/core/seq/Kconfig
+++ b/sound/core/seq/Kconfig
@@ -66,5 +66,7 @@ config SND_SEQ_UMP
 	  Say Y here to enable the support for handling UMP (Universal MIDI
 	  Packet) events via ALSA sequencer infrastructure, which is an
 	  essential feature for enabling MIDI 2.0 support.
+	  It includes the automatic conversion of ALSA sequencer events
+	  among legacy and UMP clients.
 
 endif # SND_SEQUENCER
diff --git a/sound/core/seq/Makefile b/sound/core/seq/Makefile
index 3a2177a7e50c..ba264a695643 100644
--- a/sound/core/seq/Makefile
+++ b/sound/core/seq/Makefile
@@ -8,6 +8,7 @@ snd-seq-objs := seq.o seq_lock.o seq_clientmgr.o seq_memory.o seq_queue.o \
                 seq_fifo.o seq_prioq.o seq_timer.o \
                 seq_system.o seq_ports.o
 snd-seq-$(CONFIG_SND_PROC_FS) += seq_info.o
+snd-seq-$(CONFIG_SND_SEQ_UMP) += seq_ump_convert.o
 snd-seq-midi-objs := seq_midi.o
 snd-seq-midi-emul-objs := seq_midi_emul.o
 snd-seq-midi-event-objs := seq_midi_event.o
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 33aa6c5c5c9e..07b090f76b5f 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -20,6 +20,7 @@
 #include "seq_timer.h"
 #include "seq_info.h"
 #include "seq_system.h"
+#include "seq_ump_convert.h"
 #include <sound/seq_device.h>
 #ifdef CONFIG_COMPAT
 #include <linux/compat.h>
@@ -612,6 +613,27 @@ static int update_timestamp_of_queue(struct snd_seq_event *event,
 	return 1;
 }
 
+/* deliver a single event; called from below and UMP converter */
+int __snd_seq_deliver_single_event(struct snd_seq_client *dest,
+				   struct snd_seq_client_port *dest_port,
+				   struct snd_seq_event *event,
+				   int atomic, int hop)
+{
+	switch (dest->type) {
+	case USER_CLIENT:
+		if (!dest->data.user.fifo)
+			return 0;
+		return snd_seq_fifo_event_in(dest->data.user.fifo, event);
+	case KERNEL_CLIENT:
+		if (!dest_port->event_input)
+			return 0;
+		return dest_port->event_input(event,
+					      snd_seq_ev_is_direct(event),
+					      dest_port->private_data,
+					      atomic, hop);
+	}
+	return 0;
+}
 
 /*
  * deliver an event to the specified destination.
@@ -648,22 +670,20 @@ static int snd_seq_deliver_single_event(struct snd_seq_client *client,
 		update_timestamp_of_queue(event, dest_port->time_queue,
 					  dest_port->time_real);
 
-	switch (dest->type) {
-	case USER_CLIENT:
-		if (dest->data.user.fifo)
-			result = snd_seq_fifo_event_in(dest->data.user.fifo, event);
-		break;
-
-	case KERNEL_CLIENT:
-		if (dest_port->event_input == NULL)
-			break;
-		result = dest_port->event_input(event, direct,
-						dest_port->private_data,
-						atomic, hop);
-		break;
-	default:
-		break;
+#if IS_ENABLED(CONFIG_SND_SEQ_UMP)
+	if (snd_seq_ev_is_ump(event)) {
+		result = snd_seq_deliver_from_ump(client, dest, dest_port,
+						  event, atomic, hop);
+		goto __skip;
+	} else if (snd_seq_client_is_ump(dest)) {
+		result = snd_seq_deliver_to_ump(client, dest, dest_port,
+						event, atomic, hop);
+		goto __skip;
 	}
+#endif /* CONFIG_SND_SEQ_UMP */
+
+	result = __snd_seq_deliver_single_event(dest, dest_port, event,
+						atomic, hop);
 
   __skip:
 	if (dest_port)
diff --git a/sound/core/seq/seq_clientmgr.h b/sound/core/seq/seq_clientmgr.h
index bb973d36ce78..97762892ffab 100644
--- a/sound/core/seq/seq_clientmgr.h
+++ b/sound/core/seq/seq_clientmgr.h
@@ -85,6 +85,11 @@ int snd_seq_kernel_client_write_poll(int clientid, struct file *file, poll_table
 int snd_seq_client_notify_subscription(int client, int port,
 				       struct snd_seq_port_subscribe *info, int evtype);
 
+int __snd_seq_deliver_single_event(struct snd_seq_client *dest,
+				   struct snd_seq_client_port *dest_port,
+				   struct snd_seq_event *event,
+				   int atomic, int hop);
+
 /* only for OSS sequencer */
 bool snd_seq_client_ioctl_lock(int clientid);
 void snd_seq_client_ioctl_unlock(int clientid);
@@ -95,4 +100,14 @@ extern int seq_client_load[15];
 struct snd_seq_client *snd_seq_kernel_client_get(int client);
 void snd_seq_kernel_client_put(struct snd_seq_client *cptr);
 
+static inline bool snd_seq_client_is_ump(struct snd_seq_client *c)
+{
+	return c->midi_version != SNDRV_SEQ_CLIENT_LEGACY_MIDI;
+}
+
+static inline bool snd_seq_client_is_midi2(struct snd_seq_client *c)
+{
+	return c->midi_version == SNDRV_SEQ_CLIENT_UMP_MIDI_2_0;
+}
+
 #endif
diff --git a/sound/core/seq/seq_ports.h b/sound/core/seq/seq_ports.h
index c6c138edceab..b111382f697a 100644
--- a/sound/core/seq/seq_ports.h
+++ b/sound/core/seq/seq_ports.h
@@ -42,6 +42,17 @@ struct snd_seq_port_subs_info {
 	int (*close)(void *private_data, struct snd_seq_port_subscribe *info);
 };
 
+/* context for converting from legacy control event to UMP packet */
+struct snd_seq_ump_midi2_bank {
+	bool rpn_set;
+	bool nrpn_set;
+	bool bank_set;
+	unsigned char cc_rpn_msb, cc_rpn_lsb;
+	unsigned char cc_nrpn_msb, cc_nrpn_lsb;
+	unsigned char cc_data_msb, cc_data_lsb;
+	unsigned char cc_bank_msb, cc_bank_lsb;
+};
+
 struct snd_seq_client_port {
 
 	struct snd_seq_addr addr;	/* client/port number */
@@ -75,6 +86,10 @@ struct snd_seq_client_port {
 	/* UMP direction and group */
 	unsigned char direction;
 	unsigned char ump_group;
+
+#if IS_ENABLED(CONFIG_SND_SEQ_UMP)
+	struct snd_seq_ump_midi2_bank midi2_bank[16]; /* per channel */
+#endif
 };
 
 struct snd_seq_client;
diff --git a/sound/core/seq/seq_ump_convert.c b/sound/core/seq/seq_ump_convert.c
new file mode 100644
index 000000000000..433fe842947e
--- /dev/null
+++ b/sound/core/seq/seq_ump_convert.c
@@ -0,0 +1,1190 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ALSA sequencer event conversion between UMP and legacy clients
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <sound/core.h>
+#include <sound/ump.h>
+#include <sound/ump_msg.h>
+#include "seq_ump_convert.h"
+
+/*
+ * Upgrade / downgrade value bits
+ */
+static u8 downscale_32_to_7bit(u32 src)
+{
+	return src >> 25;
+}
+
+static u16 downscale_32_to_14bit(u32 src)
+{
+	return src >> 18;
+}
+
+static u8 downscale_16_to_7bit(u16 src)
+{
+	return src >> 9;
+}
+
+static u16 upscale_7_to_16bit(u8 src)
+{
+	u16 val, repeat;
+
+	val = (u16)src << 9;
+	if (src <= 0x40)
+		return val;
+	repeat = src & 0x3f;
+	return val | (repeat << 3) | (repeat >> 3);
+}
+
+static u32 upscale_7_to_32bit(u8 src)
+{
+	u32 val, repeat;
+
+	val = src << 25;
+	if (src <= 0x40)
+		return val;
+	repeat = src & 0x3f;
+	return val | (repeat << 19) | (repeat << 13) |
+		(repeat << 7) | (repeat << 1) | (repeat >> 5);
+}
+
+static u32 upscale_14_to_32bit(u16 src)
+{
+	u32 val, repeat;
+
+	val = src << 18;
+	if (src <= 0x2000)
+		return val;
+	repeat = src & 0x1fff;
+	return val | (repeat << 5) | (repeat >> 8);
+}
+
+static unsigned char get_ump_group(struct snd_seq_client_port *port)
+{
+	return port->ump_group ? (port->ump_group - 1) : 0;
+}
+
+/* create a UMP header */
+#define make_raw_ump(port, type) \
+	ump_compose(type, get_ump_group(port), 0, 0)
+
+/*
+ * UMP -> MIDI1 sequencer event
+ */
+
+/* MIDI 1.0 CVM */
+
+/* encode note event */
+static void ump_midi1_to_note_ev(const union snd_ump_midi1_msg *val,
+				 struct snd_seq_event *ev)
+{
+	ev->data.note.channel = val->note.channel;
+	ev->data.note.note = val->note.note;
+	ev->data.note.velocity = val->note.velocity;
+}
+
+/* encode one parameter controls */
+static void ump_midi1_to_ctrl_ev(const union snd_ump_midi1_msg *val,
+				 struct snd_seq_event *ev)
+{
+	ev->data.control.channel = val->caf.channel;
+	ev->data.control.value = val->caf.data;
+}
+
+/* encode pitch wheel change */
+static void ump_midi1_to_pitchbend_ev(const union snd_ump_midi1_msg *val,
+				      struct snd_seq_event *ev)
+{
+	ev->data.control.channel = val->pb.channel;
+	ev->data.control.value = (val->pb.data_msb << 7) | val->pb.data_lsb;
+	ev->data.control.value -= 8192;
+}
+
+/* encode midi control change */
+static void ump_midi1_to_cc_ev(const union snd_ump_midi1_msg *val,
+			       struct snd_seq_event *ev)
+{
+	ev->data.control.channel = val->cc.channel;
+	ev->data.control.param = val->cc.index;
+	ev->data.control.value = val->cc.data;
+}
+
+/* Encoding MIDI 1.0 UMP packet */
+struct seq_ump_midi1_to_ev {
+	int seq_type;
+	void (*encode)(const union snd_ump_midi1_msg *val, struct snd_seq_event *ev);
+};
+
+/* Encoders for MIDI1 status 0x80-0xe0 */
+static struct seq_ump_midi1_to_ev midi1_msg_encoders[] = {
+	{SNDRV_SEQ_EVENT_NOTEOFF,	ump_midi1_to_note_ev},	/* 0x80 */
+	{SNDRV_SEQ_EVENT_NOTEON,	ump_midi1_to_note_ev},	/* 0x90 */
+	{SNDRV_SEQ_EVENT_KEYPRESS,	ump_midi1_to_note_ev},	/* 0xa0 */
+	{SNDRV_SEQ_EVENT_CONTROLLER,	ump_midi1_to_cc_ev},	/* 0xb0 */
+	{SNDRV_SEQ_EVENT_PGMCHANGE,	ump_midi1_to_ctrl_ev},	/* 0xc0 */
+	{SNDRV_SEQ_EVENT_CHANPRESS,	ump_midi1_to_ctrl_ev},	/* 0xd0 */
+	{SNDRV_SEQ_EVENT_PITCHBEND,	ump_midi1_to_pitchbend_ev}, /* 0xe0 */
+};
+
+static int cvt_ump_midi1_to_event(const union snd_ump_midi1_msg *val,
+				  struct snd_seq_event *ev)
+{
+	unsigned char status = val->note.status;
+
+	if (status < 0x8 || status > 0xe)
+		return 0; /* invalid - skip */
+	status -= 8;
+	ev->type = midi1_msg_encoders[status].seq_type;
+	ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
+	midi1_msg_encoders[status].encode(val, ev);
+	return 1;
+}
+
+/* MIDI System message */
+
+/* encode one parameter value*/
+static void ump_system_to_one_param_ev(const union snd_ump_midi1_msg *val,
+				       struct snd_seq_event *ev)
+{
+	ev->data.control.value = val->system.parm1;
+}
+
+/* encode song position */
+static void ump_system_to_songpos_ev(const union snd_ump_midi1_msg *val,
+				     struct snd_seq_event *ev)
+{
+	ev->data.control.value = (val->system.parm1 << 7) | val->system.parm2;
+}
+
+/* Encoders for 0xf0 - 0xff */
+static struct seq_ump_midi1_to_ev system_msg_encoders[] = {
+	{SNDRV_SEQ_EVENT_NONE,		NULL},	 /* 0xf0 */
+	{SNDRV_SEQ_EVENT_QFRAME,	ump_system_to_one_param_ev}, /* 0xf1 */
+	{SNDRV_SEQ_EVENT_SONGPOS,	ump_system_to_songpos_ev}, /* 0xf2 */
+	{SNDRV_SEQ_EVENT_SONGSEL,	ump_system_to_one_param_ev}, /* 0xf3 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL}, /* 0xf4 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL}, /* 0xf5 */
+	{SNDRV_SEQ_EVENT_TUNE_REQUEST,	NULL}, /* 0xf6 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL}, /* 0xf7 */
+	{SNDRV_SEQ_EVENT_CLOCK,		NULL}, /* 0xf8 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL}, /* 0xf9 */
+	{SNDRV_SEQ_EVENT_START,		NULL}, /* 0xfa */
+	{SNDRV_SEQ_EVENT_CONTINUE,	NULL}, /* 0xfb */
+	{SNDRV_SEQ_EVENT_STOP,		NULL}, /* 0xfc */
+	{SNDRV_SEQ_EVENT_NONE,		NULL}, /* 0xfd */
+	{SNDRV_SEQ_EVENT_SENSING,	NULL}, /* 0xfe */
+	{SNDRV_SEQ_EVENT_RESET,		NULL}, /* 0xff */
+};
+
+static int cvt_ump_system_to_event(const union snd_ump_midi1_msg *val,
+				   struct snd_seq_event *ev)
+{
+	unsigned char status = val->system.status;
+
+	if ((status & 0xf0) != UMP_MIDI1_MSG_REALTIME)
+		return 0; /* invalid status - skip */
+	status &= 0x0f;
+	ev->type = system_msg_encoders[status].seq_type;
+	ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
+	if (ev->type == SNDRV_SEQ_EVENT_NONE)
+		return 0;
+	if (system_msg_encoders[status].encode)
+		system_msg_encoders[status].encode(val, ev);
+	return 1;
+}
+
+/* MIDI 2.0 CVM */
+
+/* encode note event */
+static int ump_midi2_to_note_ev(const union snd_ump_midi2_msg *val,
+				struct snd_seq_event *ev)
+{
+	ev->data.note.channel = val->note.channel;
+	ev->data.note.note = val->note.note;
+	ev->data.note.velocity = downscale_16_to_7bit(val->note.velocity);
+	/* correct note-on velocity 0 to 1;
+	 * it's no longer equivalent as not-off for MIDI 2.0
+	 */
+	if (ev->type == SNDRV_SEQ_EVENT_NOTEON &&
+	    !ev->data.note.velocity)
+		ev->data.note.velocity = 1;
+	return 1;
+}
+
+/* encode pitch wheel change */
+static int ump_midi2_to_pitchbend_ev(const union snd_ump_midi2_msg *val,
+				     struct snd_seq_event *ev)
+{
+	ev->data.control.channel = val->pb.channel;
+	ev->data.control.value = downscale_32_to_14bit(val->pb.data);
+	ev->data.control.value -= 8192;
+	return 1;
+}
+
+/* encode midi control change */
+static int ump_midi2_to_cc_ev(const union snd_ump_midi2_msg *val,
+			      struct snd_seq_event *ev)
+{
+	ev->data.control.channel = val->cc.channel;
+	ev->data.control.param = val->cc.index;
+	ev->data.control.value = downscale_32_to_7bit(val->cc.data);
+	return 1;
+}
+
+/* encode midi program change */
+static int ump_midi2_to_pgm_ev(const union snd_ump_midi2_msg *val,
+			       struct snd_seq_event *ev)
+{
+	int size = 1;
+
+	ev->data.control.channel = val->pg.channel;
+	if (val->pg.bank_valid) {
+		ev->type = SNDRV_SEQ_EVENT_CONTROL14;
+		ev->data.control.param = UMP_CC_BANK_SELECT;
+		ev->data.control.value = (val->pg.bank_msb << 7) | val->pg.bank_lsb;
+		ev[1] = ev[0];
+		ev++;
+		ev->type = SNDRV_SEQ_EVENT_PGMCHANGE;
+		size = 2;
+	}
+	ev->data.control.value = val->pg.program;
+	return size;
+}
+
+/* encode one parameter controls */
+static int ump_midi2_to_ctrl_ev(const union snd_ump_midi2_msg *val,
+				struct snd_seq_event *ev)
+{
+	ev->data.control.channel = val->caf.channel;
+	ev->data.control.value = downscale_32_to_7bit(val->caf.data);
+	return 1;
+}
+
+/* encode RPN/NRPN */
+static int ump_midi2_to_rpn_ev(const union snd_ump_midi2_msg *val,
+			       struct snd_seq_event *ev)
+{
+	ev->data.control.channel = val->rpn.channel;
+	ev->data.control.param = (val->rpn.bank << 7) | val->rpn.index;
+	ev->data.control.value = downscale_32_to_14bit(val->rpn.data);
+	return 1;
+}
+
+/* Encoding MIDI 2.0 UMP Packet */
+struct seq_ump_midi2_to_ev {
+	int seq_type;
+	int (*encode)(const union snd_ump_midi2_msg *val, struct snd_seq_event *ev);
+};
+
+/* Encoders for MIDI2 status 0x00-0xf0 */
+static struct seq_ump_midi2_to_ev midi2_msg_encoders[] = {
+	{SNDRV_SEQ_EVENT_NONE,		NULL},			/* 0x00 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL},			/* 0x10 */
+	{SNDRV_SEQ_EVENT_REGPARAM,	ump_midi2_to_rpn_ev},	/* 0x20 */
+	{SNDRV_SEQ_EVENT_NONREGPARAM,	ump_midi2_to_rpn_ev},	/* 0x30 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL},			/* 0x40 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL},			/* 0x50 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL},			/* 0x60 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL},			/* 0x70 */
+	{SNDRV_SEQ_EVENT_NOTEOFF,	ump_midi2_to_note_ev},	/* 0x80 */
+	{SNDRV_SEQ_EVENT_NOTEON,	ump_midi2_to_note_ev},	/* 0x90 */
+	{SNDRV_SEQ_EVENT_KEYPRESS,	ump_midi2_to_note_ev},	/* 0xa0 */
+	{SNDRV_SEQ_EVENT_CONTROLLER,	ump_midi2_to_cc_ev},	/* 0xb0 */
+	{SNDRV_SEQ_EVENT_PGMCHANGE,	ump_midi2_to_pgm_ev},	/* 0xc0 */
+	{SNDRV_SEQ_EVENT_CHANPRESS,	ump_midi2_to_ctrl_ev},	/* 0xd0 */
+	{SNDRV_SEQ_EVENT_PITCHBEND,	ump_midi2_to_pitchbend_ev}, /* 0xe0 */
+	{SNDRV_SEQ_EVENT_NONE,		NULL},			/* 0xf0 */
+};
+
+static int cvt_ump_midi2_to_event(const union snd_ump_midi2_msg *val,
+				  struct snd_seq_event *ev)
+{
+	unsigned char status = val->note.status;
+
+	ev->type = midi2_msg_encoders[status].seq_type;
+	if (ev->type == SNDRV_SEQ_EVENT_NONE)
+		return 0; /* skip */
+	ev->flags = SNDRV_SEQ_EVENT_LENGTH_FIXED;
+	return midi2_msg_encoders[status].encode(val, ev);
+}
+
+/* parse and compose for a sysex var-length event */
+static int cvt_ump_sysex7_to_event(const u32 *data, unsigned char *buf,
+				   struct snd_seq_event *ev)
+{
+	unsigned char status;
+	unsigned char bytes;
+	u32 val;
+	int size = 0;
+
+	val = data[0];
+	status = ump_sysex_message_status(val);
+	bytes = ump_sysex_message_length(val);
+	if (bytes > 6)
+		return 0; // skip
+
+	if (status == UMP_SYSEX_STATUS_SINGLE ||
+	    status == UMP_SYSEX_STATUS_START) {
+		buf[0] = UMP_MIDI1_MSG_SYSEX_START;
+		size = 1;
+	}
+
+	if (bytes > 0)
+		buf[size++] = (val >> 8) & 0x7f;
+	if (bytes > 1)
+		buf[size++] = val & 0x7f;
+	val = data[1];
+	if (bytes > 2)
+		buf[size++] = (val >> 24) & 0x7f;
+	if (bytes > 3)
+		buf[size++] = (val >> 16) & 0x7f;
+	if (bytes > 4)
+		buf[size++] = (val >> 8) & 0x7f;
+	if (bytes > 5)
+		buf[size++] = val & 0x7f;
+
+	if (status == UMP_SYSEX_STATUS_SINGLE ||
+	    status == UMP_SYSEX_STATUS_END)
+		buf[size++] = UMP_MIDI1_MSG_SYSEX_END;
+
+	ev->type = SNDRV_SEQ_EVENT_SYSEX;
+	ev->flags = SNDRV_SEQ_EVENT_LENGTH_VARIABLE;
+	ev->data.ext.len = size;
+	ev->data.ext.ptr = buf;
+	return 1;
+}
+
+/* convert UMP packet from MIDI 1.0 to MIDI 2.0 and deliver it */
+static int cvt_ump_midi1_to_midi2(struct snd_seq_client *dest,
+				  struct snd_seq_client_port *dest_port,
+				  struct snd_seq_event *__event,
+				  int atomic, int hop)
+{
+	struct snd_seq_ump_event *event = (struct snd_seq_ump_event *)__event;
+	struct snd_seq_ump_event ev_cvt;
+	const union snd_ump_midi1_msg *midi1 = (const union snd_ump_midi1_msg *)event->ump;
+	union snd_ump_midi2_msg *midi2 = (union snd_ump_midi2_msg *)ev_cvt.ump;
+
+	ev_cvt = *event;
+	memset(&ev_cvt.ump, 0, sizeof(ev_cvt.ump));
+
+	midi2->note.type = UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE;
+	midi2->note.group = midi1->note.group;
+	midi2->note.status = midi1->note.status;
+	midi2->note.channel = midi1->note.channel;
+	switch (midi1->note.status) {
+	case UMP_MSG_STATUS_NOTE_ON:
+	case UMP_MSG_STATUS_NOTE_OFF:
+		midi2->note.note = midi1->note.note;
+		midi2->note.velocity = upscale_7_to_16bit(midi1->note.velocity);
+		break;
+	case UMP_MSG_STATUS_POLY_PRESSURE:
+		midi2->paf.note = midi1->paf.note;
+		midi2->paf.data = upscale_7_to_32bit(midi1->paf.data);
+		break;
+	case UMP_MSG_STATUS_CC:
+		midi2->cc.index = midi1->cc.index;
+		midi2->cc.data = upscale_7_to_32bit(midi1->cc.data);
+		break;
+	case UMP_MSG_STATUS_PROGRAM:
+		midi2->pg.program = midi1->pg.program;
+		break;
+	case UMP_MSG_STATUS_CHANNEL_PRESSURE:
+		midi2->caf.data = upscale_7_to_32bit(midi1->caf.data);
+		break;
+	case UMP_MSG_STATUS_PITCH_BEND:
+		midi2->pb.data = upscale_14_to_32bit((midi1->pb.data_msb << 7) |
+						     midi1->pb.data_lsb);
+		break;
+	default:
+		return 0;
+	}
+
+	return __snd_seq_deliver_single_event(dest, dest_port,
+					      (struct snd_seq_event *)&ev_cvt,
+					      atomic, hop);
+}
+
+/* convert UMP packet from MIDI 2.0 to MIDI 1.0 and deliver it */
+static int cvt_ump_midi2_to_midi1(struct snd_seq_client *dest,
+				  struct snd_seq_client_port *dest_port,
+				  struct snd_seq_event *__event,
+				  int atomic, int hop)
+{
+	struct snd_seq_ump_event *event = (struct snd_seq_ump_event *)__event;
+	struct snd_seq_ump_event ev_cvt;
+	union snd_ump_midi1_msg *midi1 = (union snd_ump_midi1_msg *)ev_cvt.ump;
+	const union snd_ump_midi2_msg *midi2 = (const union snd_ump_midi2_msg *)event->ump;
+	u16 v;
+
+	ev_cvt = *event;
+	memset(&ev_cvt.ump, 0, sizeof(ev_cvt.ump));
+
+	midi1->note.type = UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE;
+	midi1->note.group = midi2->note.group;
+	midi1->note.status = midi2->note.status;
+	midi1->note.channel = midi2->note.channel;
+	switch (midi2->note.status << 4) {
+	case UMP_MSG_STATUS_NOTE_ON:
+	case UMP_MSG_STATUS_NOTE_OFF:
+		midi1->note.note = midi2->note.note;
+		midi1->note.velocity = downscale_16_to_7bit(midi2->note.velocity);
+		break;
+	case UMP_MSG_STATUS_POLY_PRESSURE:
+		midi1->paf.note = midi2->paf.note;
+		midi1->paf.data = downscale_32_to_7bit(midi2->paf.data);
+		break;
+	case UMP_MSG_STATUS_CC:
+		midi1->cc.index = midi2->cc.index;
+		midi1->cc.data = downscale_32_to_7bit(midi2->cc.data);
+		break;
+	case UMP_MSG_STATUS_PROGRAM:
+		midi1->pg.program = midi2->pg.program;
+		break;
+	case UMP_MSG_STATUS_CHANNEL_PRESSURE:
+		midi1->caf.data = downscale_32_to_7bit(midi2->caf.data);
+		break;
+	case UMP_MSG_STATUS_PITCH_BEND:
+		v = downscale_32_to_14bit(midi2->pb.data);
+		midi1->pb.data_msb = v >> 7;
+		midi1->pb.data_lsb = v & 0x7f;
+		break;
+	default:
+		return 0;
+	}
+
+	return __snd_seq_deliver_single_event(dest, dest_port,
+					      (struct snd_seq_event *)&ev_cvt,
+					      atomic, hop);
+}
+
+/* convert UMP to a legacy ALSA seq event and deliver it */
+static int cvt_ump_to_any(struct snd_seq_client *dest,
+			  struct snd_seq_client_port *dest_port,
+			  struct snd_seq_event *event,
+			  unsigned char type,
+			  int atomic, int hop)
+{
+	struct snd_seq_event ev_cvt[2]; /* up to two events */
+	struct snd_seq_ump_event *ump_ev = (struct snd_seq_ump_event *)event;
+	/* use the second event as a temp buffer for saving stack usage */
+	unsigned char *sysex_buf = (unsigned char *)(ev_cvt + 1);
+	unsigned char flags = event->flags & ~SNDRV_SEQ_EVENT_UMP;
+	int i, len, err;
+
+	ev_cvt[0] = ev_cvt[1] = *event;
+	ev_cvt[0].flags = flags;
+	ev_cvt[1].flags = flags;
+	switch (type) {
+	case UMP_MSG_TYPE_SYSTEM:
+		len = cvt_ump_system_to_event((union snd_ump_midi1_msg *)ump_ev->ump,
+					      ev_cvt);
+		break;
+	case UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE:
+		len = cvt_ump_midi1_to_event((union snd_ump_midi1_msg *)ump_ev->ump,
+					     ev_cvt);
+		break;
+	case UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE:
+		len = cvt_ump_midi2_to_event((union snd_ump_midi2_msg *)ump_ev->ump,
+					     ev_cvt);
+		break;
+	case UMP_MSG_TYPE_DATA:
+		len = cvt_ump_sysex7_to_event(ump_ev->ump, sysex_buf, ev_cvt);
+		break;
+	default:
+		return 0;
+	}
+
+	for (i = 0; i < len; i++) {
+		err = __snd_seq_deliver_single_event(dest, dest_port,
+						     &ev_cvt[i], atomic, hop);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+/* Replace UMP group field with the destination and deliver */
+static int deliver_with_group_convert(struct snd_seq_client *dest,
+				      struct snd_seq_client_port *dest_port,
+				      struct snd_seq_ump_event *ump_ev,
+				      int atomic, int hop)
+{
+	struct snd_seq_ump_event ev = *ump_ev;
+
+	/* rewrite the group to the destination port */
+	ev.ump[0] &= ~(0xfU << 24);
+	/* fill with the new group; the dest_port->ump_group field is 1-based */
+	ev.ump[0] |= ((dest_port->ump_group - 1) << 24);
+
+	return __snd_seq_deliver_single_event(dest, dest_port,
+					      (struct snd_seq_event *)&ev,
+					      atomic, hop);
+}
+
+/* Convert from UMP packet and deliver */
+int snd_seq_deliver_from_ump(struct snd_seq_client *source,
+			     struct snd_seq_client *dest,
+			     struct snd_seq_client_port *dest_port,
+			     struct snd_seq_event *event,
+			     int atomic, int hop)
+{
+	struct snd_seq_ump_event *ump_ev = (struct snd_seq_ump_event *)event;
+	unsigned char type;
+
+	if (snd_seq_ev_is_variable(event))
+		return 0; // skip, no variable event for UMP, so far
+	type = ump_message_type(ump_ev->ump[0]);
+
+	if (snd_seq_client_is_ump(dest)) {
+		if (snd_seq_client_is_midi2(dest) &&
+		    type == UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE)
+			return cvt_ump_midi1_to_midi2(dest, dest_port,
+						      event, atomic, hop);
+		else if (!snd_seq_client_is_midi2(dest) &&
+			 type == UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE)
+			return cvt_ump_midi2_to_midi1(dest, dest_port,
+						      event, atomic, hop);
+		/* non-EP port and different group is set? */
+		if (dest_port->ump_group &&
+		    ump_message_group(*ump_ev->ump) + 1 != dest_port->ump_group)
+			return deliver_with_group_convert(dest, dest_port,
+							  ump_ev, atomic, hop);
+		/* copy as-is */
+		return __snd_seq_deliver_single_event(dest, dest_port,
+						      event, atomic, hop);
+	}
+
+	return cvt_ump_to_any(dest, dest_port, event, type, atomic, hop);
+}
+
+/*
+ * MIDI1 sequencer event -> UMP conversion
+ */
+
+/* Conversion to UMP MIDI 1.0 */
+
+/* convert note on/off event to MIDI 1.0 UMP */
+static int note_ev_to_ump_midi1(const struct snd_seq_event *event,
+				struct snd_seq_client_port *dest_port,
+				union snd_ump_midi1_msg *data,
+				unsigned char status)
+{
+	if (!event->data.note.velocity)
+		status = UMP_MSG_STATUS_NOTE_OFF;
+	data->note.status = status;
+	data->note.channel = event->data.note.channel & 0x0f;
+	data->note.velocity = event->data.note.velocity & 0x7f;
+	data->note.note = event->data.note.note & 0x7f;
+	return 1;
+}
+
+/* convert CC event to MIDI 1.0 UMP */
+static int cc_ev_to_ump_midi1(const struct snd_seq_event *event,
+			      struct snd_seq_client_port *dest_port,
+			      union snd_ump_midi1_msg *data,
+			      unsigned char status)
+{
+	data->cc.status = status;
+	data->cc.channel = event->data.control.channel & 0x0f;
+	data->cc.index = event->data.control.param;
+	data->cc.data = event->data.control.value;
+	return 1;
+}
+
+/* convert one-parameter control event to MIDI 1.0 UMP */
+static int ctrl_ev_to_ump_midi1(const struct snd_seq_event *event,
+				struct snd_seq_client_port *dest_port,
+				union snd_ump_midi1_msg *data,
+				unsigned char status)
+{
+	data->caf.status = status;
+	data->caf.channel = event->data.control.channel & 0x0f;
+	data->caf.data = event->data.control.value & 0x7f;
+	return 1;
+}
+
+/* convert pitchbend event to MIDI 1.0 UMP */
+static int pitchbend_ev_to_ump_midi1(const struct snd_seq_event *event,
+				     struct snd_seq_client_port *dest_port,
+				     union snd_ump_midi1_msg *data,
+				     unsigned char status)
+{
+	int val = event->data.control.value + 8192;
+
+	val = clamp(val, 0, 0x3fff);
+	data->pb.status = status;
+	data->pb.channel = event->data.control.channel & 0x0f;
+	data->pb.data_msb = (val >> 7) & 0x7f;
+	data->pb.data_lsb = val & 0x7f;
+	return 1;
+}
+
+/* convert 14bit control event to MIDI 1.0 UMP; split to two events */
+static int ctrl14_ev_to_ump_midi1(const struct snd_seq_event *event,
+				  struct snd_seq_client_port *dest_port,
+				  union snd_ump_midi1_msg *data,
+				  unsigned char status)
+{
+	data->cc.status = UMP_MSG_STATUS_CC;
+	data->cc.channel = event->data.control.channel & 0x0f;
+	data->cc.index = event->data.control.param & 0x7f;
+	if (event->data.control.param < 0x20) {
+		data->cc.data = (event->data.control.value >> 7) & 0x7f;
+		data[1] = data[0];
+		data[1].cc.index = event->data.control.param | 0x20;
+		data[1].cc.data = event->data.control.value & 0x7f;
+		return 2;
+	}
+
+	data->cc.data = event->data.control.value & 0x7f;
+	return 1;
+}
+
+/* convert RPN/NRPN event to MIDI 1.0 UMP; split to four events */
+static int rpn_ev_to_ump_midi1(const struct snd_seq_event *event,
+			       struct snd_seq_client_port *dest_port,
+			       union snd_ump_midi1_msg *data,
+			       unsigned char status)
+{
+	bool is_rpn = (status == UMP_MSG_STATUS_RPN);
+
+	data->cc.status = UMP_MSG_STATUS_CC;
+	data->cc.channel = event->data.control.channel & 0x0f;
+	data[1] = data[2] = data[3] = data[0];
+
+	data[0].cc.index = is_rpn ? UMP_CC_RPN_MSB : UMP_CC_NRPN_MSB;
+	data[0].cc.data = (event->data.control.param >> 7) & 0x7f;
+	data[1].cc.index = is_rpn ? UMP_CC_RPN_LSB : UMP_CC_NRPN_LSB;
+	data[1].cc.data = event->data.control.param & 0x7f;
+	data[2].cc.index = UMP_CC_DATA;
+	data[2].cc.data = (event->data.control.value >> 7) & 0x7f;
+	data[3].cc.index = UMP_CC_DATA_LSB;
+	data[3].cc.data = event->data.control.value & 0x7f;
+	return 4;
+}
+
+/* convert system / RT message to UMP */
+static int system_ev_to_ump_midi1(const struct snd_seq_event *event,
+				  struct snd_seq_client_port *dest_port,
+				  union snd_ump_midi1_msg *data,
+				  unsigned char status)
+{
+	data->system.status = status;
+	return 1;
+}
+
+/* convert system / RT message with 1 parameter to UMP */
+static int system_1p_ev_to_ump_midi1(const struct snd_seq_event *event,
+				     struct snd_seq_client_port *dest_port,
+				     union snd_ump_midi1_msg *data,
+				     unsigned char status)
+{
+	data->system.status = status;
+	data->system.parm1 = event->data.control.value & 0x7f;
+	return 1;
+}
+
+/* convert system / RT message with two parameters to UMP */
+static int system_2p_ev_to_ump_midi1(const struct snd_seq_event *event,
+				     struct snd_seq_client_port *dest_port,
+				     union snd_ump_midi1_msg *data,
+				     unsigned char status)
+{
+	data->system.status = status;
+	data->system.parm1 = (event->data.control.value >> 7) & 0x7f;
+	data->system.parm1 = event->data.control.value & 0x7f;
+	return 1;
+}
+
+/* Conversion to UMP MIDI 2.0 */
+
+/* convert note on/off event to MIDI 2.0 UMP */
+static int note_ev_to_ump_midi2(const struct snd_seq_event *event,
+				struct snd_seq_client_port *dest_port,
+				union snd_ump_midi2_msg *data,
+				unsigned char status)
+{
+	if (!event->data.note.velocity)
+		status = UMP_MSG_STATUS_NOTE_OFF;
+	data->note.status = status;
+	data->note.channel = event->data.note.channel & 0x0f;
+	data->note.note = event->data.note.note & 0x7f;
+	data->note.velocity = upscale_7_to_16bit(event->data.note.velocity & 0x7f);
+	return 1;
+}
+
+/* convert PAF event to MIDI 2.0 UMP */
+static int paf_ev_to_ump_midi2(const struct snd_seq_event *event,
+			       struct snd_seq_client_port *dest_port,
+			       union snd_ump_midi2_msg *data,
+			       unsigned char status)
+{
+	data->paf.status = status;
+	data->paf.channel = event->data.note.channel & 0x0f;
+	data->paf.note = event->data.note.note & 0x7f;
+	data->paf.data = upscale_7_to_32bit(event->data.note.velocity & 0x7f);
+	return 1;
+}
+
+/* set up the MIDI2 RPN/NRPN packet data from the parsed info */
+static void fill_rpn(struct snd_seq_ump_midi2_bank *cc,
+		     union snd_ump_midi2_msg *data)
+{
+	if (cc->rpn_set) {
+		data->rpn.status = UMP_MSG_STATUS_RPN;
+		data->rpn.bank = cc->cc_rpn_msb;
+		data->rpn.index = cc->cc_rpn_lsb;
+		cc->rpn_set = 0;
+		cc->cc_rpn_msb = cc->cc_rpn_lsb = 0;
+	} else {
+		data->rpn.status = UMP_MSG_STATUS_NRPN;
+		data->rpn.bank = cc->cc_nrpn_msb;
+		data->rpn.index = cc->cc_nrpn_lsb;
+		cc->nrpn_set = 0;
+		cc->cc_nrpn_msb = cc->cc_nrpn_lsb = 0;
+	}
+	data->rpn.data = upscale_14_to_32bit((cc->cc_data_msb << 7) |
+					     cc->cc_data_lsb);
+	cc->cc_data_msb = cc->cc_data_lsb = 0;
+}
+
+/* convert CC event to MIDI 2.0 UMP */
+static int cc_ev_to_ump_midi2(const struct snd_seq_event *event,
+			      struct snd_seq_client_port *dest_port,
+			      union snd_ump_midi2_msg *data,
+			      unsigned char status)
+{
+	unsigned char channel = event->data.control.channel & 0x0f;
+	unsigned char index = event->data.control.param & 0x7f;
+	unsigned char val = event->data.control.value & 0x7f;
+	struct snd_seq_ump_midi2_bank *cc = &dest_port->midi2_bank[channel];
+
+	/* process special CC's (bank/rpn/nrpn) */
+	switch (index) {
+	case UMP_CC_RPN_MSB:
+		cc->rpn_set = 1;
+		cc->cc_rpn_msb = val;
+		return 0; // skip
+	case UMP_CC_RPN_LSB:
+		cc->rpn_set = 1;
+		cc->cc_rpn_lsb = val;
+		return 0; // skip
+	case UMP_CC_NRPN_MSB:
+		cc->nrpn_set = 1;
+		cc->cc_nrpn_msb = val;
+		return 0; // skip
+	case UMP_CC_NRPN_LSB:
+		cc->nrpn_set = 1;
+		cc->cc_nrpn_lsb = val;
+		return 0; // skip
+	case UMP_CC_DATA:
+		cc->cc_data_msb = val;
+		return 0; // skip
+	case UMP_CC_BANK_SELECT:
+		cc->bank_set = 1;
+		cc->cc_bank_msb = val;
+		return 0; // skip
+	case UMP_CC_BANK_SELECT_LSB:
+		cc->bank_set = 1;
+		cc->cc_bank_lsb = val;
+		return 0; // skip
+	case UMP_CC_DATA_LSB:
+		cc->cc_data_lsb = val;
+		if (!(cc->rpn_set || cc->nrpn_set))
+			return 0; // skip
+		fill_rpn(cc, data);
+		return 1;
+	}
+
+	data->cc.status = status;
+	data->cc.channel = channel;
+	data->cc.index = index;
+	data->cc.data = upscale_7_to_32bit(event->data.control.value & 0x7f);
+	return 1;
+}
+
+/* convert one-parameter control event to MIDI 2.0 UMP */
+static int ctrl_ev_to_ump_midi2(const struct snd_seq_event *event,
+				struct snd_seq_client_port *dest_port,
+				union snd_ump_midi2_msg *data,
+				unsigned char status)
+{
+	data->caf.status = status;
+	data->caf.channel = event->data.control.channel & 0x0f;
+	data->caf.data = upscale_7_to_32bit(event->data.control.value & 0x7f);
+	return 1;
+}
+
+/* convert program change event to MIDI 2.0 UMP */
+static int pgm_ev_to_ump_midi2(const struct snd_seq_event *event,
+			       struct snd_seq_client_port *dest_port,
+			       union snd_ump_midi2_msg *data,
+			       unsigned char status)
+{
+	unsigned char channel = event->data.control.channel & 0x0f;
+	struct snd_seq_ump_midi2_bank *cc = &dest_port->midi2_bank[channel];
+
+	data->pg.status = status;
+	data->pg.channel = channel;
+	data->pg.program = event->data.control.value & 0x7f;
+	if (cc->bank_set) {
+		data->pg.bank_valid = 1;
+		data->pg.bank_msb = cc->cc_bank_msb;
+		data->pg.bank_lsb = cc->cc_bank_lsb;
+		cc->bank_set = 0;
+		cc->cc_bank_msb = cc->cc_bank_lsb = 0;
+	}
+	return 1;
+}
+
+/* convert pitchbend event to MIDI 2.0 UMP */
+static int pitchbend_ev_to_ump_midi2(const struct snd_seq_event *event,
+				     struct snd_seq_client_port *dest_port,
+				     union snd_ump_midi2_msg *data,
+				     unsigned char status)
+{
+	int val = event->data.control.value + 8192;
+
+	val = clamp(val, 0, 0x3fff);
+	data->pb.status = status;
+	data->pb.channel = event->data.control.channel & 0x0f;
+	data->pb.data = upscale_14_to_32bit(val);
+	return 1;
+}
+
+/* convert 14bit control event to MIDI 2.0 UMP; split to two events */
+static int ctrl14_ev_to_ump_midi2(const struct snd_seq_event *event,
+				  struct snd_seq_client_port *dest_port,
+				  union snd_ump_midi2_msg *data,
+				  unsigned char status)
+{
+	unsigned char channel = event->data.control.channel & 0x0f;
+	unsigned char index = event->data.control.param & 0x7f;
+	struct snd_seq_ump_midi2_bank *cc = &dest_port->midi2_bank[channel];
+	unsigned char msb, lsb;
+
+	msb = (event->data.control.value >> 7) & 0x7f;
+	lsb = event->data.control.value & 0x7f;
+	/* process special CC's (bank/rpn/nrpn) */
+	switch (index) {
+	case UMP_CC_BANK_SELECT:
+		cc->cc_bank_msb = msb;
+		fallthrough;
+	case UMP_CC_BANK_SELECT_LSB:
+		cc->bank_set = 1;
+		cc->cc_bank_lsb = lsb;
+		return 0; // skip
+	case UMP_CC_RPN_MSB:
+		cc->cc_rpn_msb = msb;
+		fallthrough;
+	case UMP_CC_RPN_LSB:
+		cc->rpn_set = 1;
+		cc->cc_rpn_lsb = lsb;
+		return 0; // skip
+	case UMP_CC_NRPN_MSB:
+		cc->cc_nrpn_msb = msb;
+		fallthrough;
+	case UMP_CC_NRPN_LSB:
+		cc->nrpn_set = 1;
+		cc->cc_nrpn_lsb = lsb;
+		return 0; // skip
+	case UMP_CC_DATA:
+		cc->cc_data_msb = msb;
+		fallthrough;
+	case UMP_CC_DATA_LSB:
+		cc->cc_data_lsb = lsb;
+		if (!(cc->rpn_set || cc->nrpn_set))
+			return 0; // skip
+		fill_rpn(cc, data);
+		return 1;
+	}
+
+	data->cc.status = UMP_MSG_STATUS_CC;
+	data->cc.channel = channel;
+	data->cc.index = index;
+	if (event->data.control.param < 0x20) {
+		data->cc.data = upscale_7_to_32bit(msb);
+		data[1] = data[0];
+		data[1].cc.index = event->data.control.param | 0x20;
+		data[1].cc.data = upscale_7_to_32bit(lsb);
+		return 2;
+	}
+
+	data->cc.data = upscale_7_to_32bit(lsb);
+	return 1;
+}
+
+/* convert RPN/NRPN event to MIDI 2.0 UMP */
+static int rpn_ev_to_ump_midi2(const struct snd_seq_event *event,
+			       struct snd_seq_client_port *dest_port,
+			       union snd_ump_midi2_msg *data,
+			       unsigned char status)
+{
+	data->rpn.status = status;
+	data->rpn.channel = event->data.control.channel;
+	data->rpn.bank = (event->data.control.param >> 7) & 0x7f;
+	data->rpn.index = event->data.control.param & 0x7f;
+	data->rpn.data = upscale_14_to_32bit(event->data.control.value & 0x3fff);
+	return 1;
+}
+
+/* convert system / RT message to UMP */
+static int system_ev_to_ump_midi2(const struct snd_seq_event *event,
+				  struct snd_seq_client_port *dest_port,
+				  union snd_ump_midi2_msg *data,
+				  unsigned char status)
+{
+	return system_ev_to_ump_midi1(event, dest_port,
+				      (union snd_ump_midi1_msg *)data,
+				      status);
+}
+
+/* convert system / RT message with 1 parameter to UMP */
+static int system_1p_ev_to_ump_midi2(const struct snd_seq_event *event,
+				     struct snd_seq_client_port *dest_port,
+				     union snd_ump_midi2_msg *data,
+				     unsigned char status)
+{
+	return system_1p_ev_to_ump_midi1(event, dest_port,
+					 (union snd_ump_midi1_msg *)data,
+					 status);
+}
+
+/* convert system / RT message with two parameters to UMP */
+static int system_2p_ev_to_ump_midi2(const struct snd_seq_event *event,
+				     struct snd_seq_client_port *dest_port,
+				     union snd_ump_midi2_msg *data,
+				     unsigned char status)
+{
+	return system_1p_ev_to_ump_midi1(event, dest_port,
+					 (union snd_ump_midi1_msg *)data,
+					 status);
+}
+
+struct seq_ev_to_ump {
+	int seq_type;
+	unsigned char status;
+	int (*midi1_encode)(const struct snd_seq_event *event,
+			    struct snd_seq_client_port *dest_port,
+			    union snd_ump_midi1_msg *data,
+			    unsigned char status);
+	int (*midi2_encode)(const struct snd_seq_event *event,
+			    struct snd_seq_client_port *dest_port,
+			    union snd_ump_midi2_msg *data,
+			    unsigned char status);
+};
+
+static const struct seq_ev_to_ump seq_ev_ump_encoders[] = {
+	{ SNDRV_SEQ_EVENT_NOTEON, UMP_MSG_STATUS_NOTE_ON,
+	  note_ev_to_ump_midi1, note_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_NOTEOFF, UMP_MSG_STATUS_NOTE_OFF,
+	  note_ev_to_ump_midi1, note_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_KEYPRESS, UMP_MSG_STATUS_POLY_PRESSURE,
+	  note_ev_to_ump_midi1, paf_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_CONTROLLER, UMP_MSG_STATUS_CC,
+	  cc_ev_to_ump_midi1, cc_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_PGMCHANGE, UMP_MSG_STATUS_PROGRAM,
+	  ctrl_ev_to_ump_midi1, pgm_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_CHANPRESS, UMP_MSG_STATUS_CHANNEL_PRESSURE,
+	  ctrl_ev_to_ump_midi1, ctrl_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_PITCHBEND, UMP_MSG_STATUS_PITCH_BEND,
+	  pitchbend_ev_to_ump_midi1, pitchbend_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_CONTROL14, 0,
+	  ctrl14_ev_to_ump_midi1, ctrl14_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_NONREGPARAM, UMP_MSG_STATUS_NRPN,
+	  rpn_ev_to_ump_midi1, rpn_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_REGPARAM, UMP_MSG_STATUS_RPN,
+	  rpn_ev_to_ump_midi1, rpn_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_QFRAME, UMP_SYSTEM_STATUS_MIDI_TIME_CODE,
+	  system_1p_ev_to_ump_midi1, system_1p_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_SONGPOS, UMP_SYSTEM_STATUS_SONG_POSITION,
+	  system_2p_ev_to_ump_midi1, system_2p_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_SONGSEL, UMP_SYSTEM_STATUS_SONG_SELECT,
+	  system_1p_ev_to_ump_midi1, system_1p_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_TUNE_REQUEST, UMP_SYSTEM_STATUS_TUNE_REQUEST,
+	  system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_CLOCK, UMP_SYSTEM_STATUS_TIMING_CLOCK,
+	  system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_START, UMP_SYSTEM_STATUS_START,
+	  system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_CONTINUE, UMP_SYSTEM_STATUS_CONTINUE,
+	  system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_STOP, UMP_SYSTEM_STATUS_STOP,
+	  system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
+	{ SNDRV_SEQ_EVENT_SENSING, UMP_SYSTEM_STATUS_ACTIVE_SENSING,
+	  system_ev_to_ump_midi1, system_ev_to_ump_midi2 },
+};
+
+static const struct seq_ev_to_ump *find_ump_encoder(int type)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(seq_ev_ump_encoders); i++)
+		if (seq_ev_ump_encoders[i].seq_type == type)
+			return &seq_ev_ump_encoders[i];
+
+	return NULL;
+}
+
+static void setup_ump_event(struct snd_seq_ump_event *dest,
+			    const struct snd_seq_event *src)
+{
+	memcpy(dest, src, sizeof(*src));
+	dest->type = 0;
+	dest->flags |= SNDRV_SEQ_EVENT_UMP;
+	dest->flags &= ~SNDRV_SEQ_EVENT_LENGTH_MASK;
+	memset(dest->ump, 0, sizeof(dest->ump));
+}
+
+/* Convert ALSA seq event to UMP MIDI 1.0 and deliver it */
+static int cvt_to_ump_midi1(struct snd_seq_client *dest,
+			    struct snd_seq_client_port *dest_port,
+			    struct snd_seq_event *event,
+			    int atomic, int hop)
+{
+	const struct seq_ev_to_ump *encoder;
+	struct snd_seq_ump_event ev_cvt;
+	union snd_ump_midi1_msg data[4];
+	int i, n, err;
+
+	encoder = find_ump_encoder(event->type);
+	if (!encoder)
+		return __snd_seq_deliver_single_event(dest, dest_port,
+						      event, atomic, hop);
+
+	data->raw = make_raw_ump(dest_port, UMP_MSG_TYPE_MIDI1_CHANNEL_VOICE);
+	n = encoder->midi1_encode(event, dest_port, data, encoder->status);
+	if (!n)
+		return 0;
+
+	setup_ump_event(&ev_cvt, event);
+	for (i = 0; i < n; i++) {
+		ev_cvt.ump[0] = data[i].raw;
+		err = __snd_seq_deliver_single_event(dest, dest_port,
+						     (struct snd_seq_event *)&ev_cvt,
+						     atomic, hop);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+/* Convert ALSA seq event to UMP MIDI 2.0 and deliver it */
+static int cvt_to_ump_midi2(struct snd_seq_client *dest,
+			    struct snd_seq_client_port *dest_port,
+			    struct snd_seq_event *event,
+			    int atomic, int hop)
+{
+	const struct seq_ev_to_ump *encoder;
+	struct snd_seq_ump_event ev_cvt;
+	union snd_ump_midi2_msg data[2];
+	int i, n, err;
+
+	encoder = find_ump_encoder(event->type);
+	if (!encoder)
+		return __snd_seq_deliver_single_event(dest, dest_port,
+						      event, atomic, hop);
+
+	data->raw[0] = make_raw_ump(dest_port, UMP_MSG_TYPE_MIDI2_CHANNEL_VOICE);
+	data->raw[1] = 0;
+	n = encoder->midi2_encode(event, dest_port, data, encoder->status);
+	if (!n)
+		return 0;
+
+	setup_ump_event(&ev_cvt, event);
+	for (i = 0; i < n; i++) {
+		memcpy(ev_cvt.ump, &data[i], sizeof(data[i]));
+		err = __snd_seq_deliver_single_event(dest, dest_port,
+						     (struct snd_seq_event *)&ev_cvt,
+						     atomic, hop);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+/* Fill up a sysex7 UMP from the byte stream */
+static void fill_sysex7_ump(struct snd_seq_client_port *dest_port,
+			    u32 *val, u8 status, u8 *buf, int len)
+{
+	memset(val, 0, 8);
+	memcpy((u8 *)val + 2, buf, len);
+#ifdef __LITTLE_ENDIAN
+	swab32_array(val, 2);
+#endif
+	val[0] |= ump_compose(UMP_MSG_TYPE_DATA, get_ump_group(dest_port),
+			      status, len);
+}
+
+/* Convert sysex var event to UMP sysex7 packets and deliver them */
+static int cvt_sysex_to_ump(struct snd_seq_client *dest,
+			    struct snd_seq_client_port *dest_port,
+			    struct snd_seq_event *event,
+			    int atomic, int hop)
+{
+	struct snd_seq_ump_event ev_cvt;
+	unsigned char status;
+	u8 buf[6], *xbuf;
+	int offset = 0;
+	int len, err;
+
+	if (!snd_seq_ev_is_variable(event))
+		return 0;
+
+	setup_ump_event(&ev_cvt, event);
+	for (;;) {
+		len = snd_seq_expand_var_event_at(event, sizeof(buf), buf, offset);
+		if (len <= 0)
+			break;
+		if (WARN_ON(len > 6))
+			break;
+		offset += len;
+		xbuf = buf;
+		if (*xbuf == UMP_MIDI1_MSG_SYSEX_START) {
+			status = UMP_SYSEX_STATUS_START;
+			xbuf++;
+			len--;
+			if (len > 0 && xbuf[len - 1] == UMP_MIDI1_MSG_SYSEX_END) {
+				status = UMP_SYSEX_STATUS_SINGLE;
+				len--;
+			}
+		} else {
+			if (xbuf[len - 1] == UMP_MIDI1_MSG_SYSEX_END) {
+				status = UMP_SYSEX_STATUS_END;
+				len--;
+			} else {
+				status = UMP_SYSEX_STATUS_CONTINUE;
+			}
+		}
+		fill_sysex7_ump(dest_port, ev_cvt.ump, status, xbuf, len);
+		err = __snd_seq_deliver_single_event(dest, dest_port,
+						     (struct snd_seq_event *)&ev_cvt,
+						     atomic, hop);
+		if (err < 0)
+			return err;
+	}
+	return 0;
+}
+
+/* Convert to UMP packet and deliver */
+int snd_seq_deliver_to_ump(struct snd_seq_client *source,
+			   struct snd_seq_client *dest,
+			   struct snd_seq_client_port *dest_port,
+			   struct snd_seq_event *event,
+			   int atomic, int hop)
+{
+	if (event->type == SNDRV_SEQ_EVENT_SYSEX)
+		return cvt_sysex_to_ump(dest, dest_port, event, atomic, hop);
+	else if (snd_seq_client_is_midi2(dest))
+		return cvt_to_ump_midi2(dest, dest_port, event, atomic, hop);
+	else
+		return cvt_to_ump_midi1(dest, dest_port, event, atomic, hop);
+}
diff --git a/sound/core/seq/seq_ump_convert.h b/sound/core/seq/seq_ump_convert.h
new file mode 100644
index 000000000000..6c146d803280
--- /dev/null
+++ b/sound/core/seq/seq_ump_convert.h
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ALSA sequencer event conversion between UMP and legacy clients
+ */
+#ifndef __SEQ_UMP_CONVERT_H
+#define __SEQ_UMP_CONVERT_H
+
+#include "seq_clientmgr.h"
+#include "seq_ports.h"
+
+int snd_seq_deliver_from_ump(struct snd_seq_client *source,
+			     struct snd_seq_client *dest,
+			     struct snd_seq_client_port *dest_port,
+			     struct snd_seq_event *event,
+			     int atomic, int hop);
+int snd_seq_deliver_to_ump(struct snd_seq_client *source,
+			   struct snd_seq_client *dest,
+			   struct snd_seq_client_port *dest_port,
+			   struct snd_seq_event *event,
+			   int atomic, int hop);
+
+#endif /* __SEQ_UMP_CONVERT_H */