ALSA: seq: Add UMP group number to snd_seq_port_info

Add yet more new filed "ump_group" to snd_seq_port_info for specifying
the associated UMP Group number for each sequencer port.  This will be
referred in the upcoming automatic UMP conversion in sequencer core.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20230523075358.9672-30-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/uapi/sound/asequencer.h

@@ -478,7 +478,8 @@ struct snd_seq_port_info {
 	unsigned int flags;		/* misc. conditioning */
 	unsigned char time_queue;	/* queue # for timestamping */
 	unsigned char direction;	/* port usage direction (r/w/bidir) */
-	char reserved[58];		/* for future use */
+	unsigned char ump_group;	/* 0 = UMP EP (no conversion), 1-16 = UMP group number */
+	char reserved[57];		/* for future use */
 };
 
 

sound/core/seq/seq_ports.c

@@ -356,8 +356,12 @@ int snd_seq_set_port_info(struct snd_seq_client_port * port,
 	port->time_real = (info->flags & SNDRV_SEQ_PORT_FLG_TIME_REAL) ? 1 : 0;
 	port->time_queue = info->time_queue;
 
-	/* direction */
+	/* UMP direction and group */
 	port->direction = info->direction;
+	port->ump_group = info->ump_group;
+	if (port->ump_group > SNDRV_UMP_MAX_GROUPS)
+		port->ump_group = 0;
+
 	/* fill default port direction */
 	if (!port->direction) {
 		if (info->capability & SNDRV_SEQ_PORT_CAP_READ)
@@ -403,8 +407,9 @@ int snd_seq_get_port_info(struct snd_seq_client_port * port,
 		info->time_queue = port->time_queue;
 	}
 
-	/* direction */
+	/* UMP direction and group */
 	info->direction = port->direction;
+	info->ump_group = port->ump_group;
 
 	return 0;
 }

sound/core/seq/seq_ports.h

@@ -72,8 +72,9 @@ struct snd_seq_client_port {
 	int midi_voices;
 	int synth_voices;
 
-	/* direction */
+	/* UMP direction and group */
 	unsigned char direction;
+	unsigned char ump_group;
 };
 
 struct snd_seq_client;