From 3bfd7c0ba184de99e9f5083b29e5308f30767265 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 17 Jul 2024 10:33:01 +0200 Subject: [PATCH] ALSA: seq: ump: Skip useless ports for static blocks When the UMP Endpoint is configured with static blocks, the block configuration will never change, hence the unused ports will be unchanged as well. Creating sequencer ports for those unused ports is simply useless, and it might be rather confusing for users. The idea behind the inactive ports was for allowing connections from/to ports that can become usable later, but this will never happen for inactive groups in static blocks. Let's change the sequencer UMP binding to skip those unused ports when the UMP EP is with static blocks. Fixes: 81fd444aa371 ("ALSA: seq: Bind UMP device") Cc: Link: https://patch.msgid.link/20240717083322.25892-1-tiwai@suse.de Signed-off-by: Takashi Iwai --- sound/core/seq/seq_ump_client.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/sound/core/seq/seq_ump_client.c b/sound/core/seq/seq_ump_client.c index c627d72f7fe2..9cdfbeae3ed5 100644 --- a/sound/core/seq/seq_ump_client.c +++ b/sound/core/seq/seq_ump_client.c @@ -28,6 +28,7 @@ struct seq_ump_group { int group; /* group index (0-based) */ unsigned int dir_bits; /* directions */ bool active; /* activeness */ + bool valid; /* valid group (referred by blocks) */ char name[64]; /* seq port name */ }; @@ -210,6 +211,13 @@ static void fill_port_info(struct snd_seq_port_info *port, sprintf(port->name, "Group %d", group->group + 1); } +/* skip non-existing group for static blocks */ +static bool skip_group(struct seq_ump_client *client, struct seq_ump_group *group) +{ + return !group->valid && + (client->ump->info.flags & SNDRV_UMP_EP_INFO_STATIC_BLOCKS); +} + /* create a new sequencer port per UMP group */ static int seq_ump_group_init(struct seq_ump_client *client, int group_index) { @@ -217,6 +225,9 @@ static int seq_ump_group_init(struct seq_ump_client *client, int group_index) struct snd_seq_port_info *port __free(kfree) = NULL; struct snd_seq_port_callback pcallbacks; + if (skip_group(client, group)) + return 0; + port = kzalloc(sizeof(*port), GFP_KERNEL); if (!port) return -ENOMEM; @@ -250,6 +261,9 @@ static void update_port_infos(struct seq_ump_client *client) return; for (i = 0; i < SNDRV_UMP_MAX_GROUPS; i++) { + if (skip_group(client, &client->groups[i])) + continue; + old->addr.client = client->seq_client; old->addr.port = i; err = snd_seq_kernel_client_ctl(client->seq_client, @@ -284,6 +298,7 @@ static void update_group_attrs(struct seq_ump_client *client) group->dir_bits = 0; group->active = 0; group->group = i; + group->valid = false; } list_for_each_entry(fb, &client->ump->block_list, list) { @@ -291,6 +306,7 @@ static void update_group_attrs(struct seq_ump_client *client) break; group = &client->groups[fb->info.first_group]; for (i = 0; i < fb->info.num_groups; i++, group++) { + group->valid = true; if (fb->info.active) group->active = 1; switch (fb->info.direction) {