diff options
| author | Takashi Iwai <tiwai@suse.de> | 2023-05-23 09:53:49 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-05-23 12:11:25 +0200 |
| commit | ff166a9d19fab3d77f50e9413df046fb1d7c01cc (patch) | |
| tree | 83f10c67596229f116c898a0ee27622b16486cd6 /sound/core/seq/seq_clientmgr.c | |
| parent | 177ccf811df4a893df339a72dc732bb26b66d055 (diff) | |
ALSA: seq: Add port direction to snd_seq_port_info
Add a new field "direction" to snd_seq_port_info for allowing a client
to tell the expected direction of the port access. A port might still
allow subscriptions for read/write (e.g. for MIDI-CI) even if the
primary usage of the port is a single direction (either input or
output only). This new "direction" field can help to indicate such
cases.
When the direction is unspecified at creating a port and the port has
either read or write capability, the corresponding direction bits are
set automatically as default.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20230523075358.9672-29-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/seq/seq_clientmgr.c')
| -rw-r--r-- | sound/core/seq/seq_clientmgr.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c index 061b3e2bece1..33aa6c5c5c9e 100644 --- a/sound/core/seq/seq_clientmgr.c +++ b/sound/core/seq/seq_clientmgr.c @@ -2440,6 +2440,17 @@ static void snd_seq_info_dump_subscribers(struct snd_info_buffer *buffer, #define FLAG_PERM_DUPLEX(perm) ((perm) & SNDRV_SEQ_PORT_CAP_DUPLEX ? 'X' : '-') +static const char *port_direction_name(unsigned char dir) +{ + static const char *names[4] = { + "-", "In", "Out", "In/Out" + }; + + if (dir > SNDRV_SEQ_PORT_DIR_BIDIRECTION) + return "Invalid"; + return names[dir]; +} + static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, struct snd_seq_client *client) { @@ -2449,12 +2460,13 @@ static void snd_seq_info_dump_ports(struct snd_info_buffer *buffer, list_for_each_entry(p, &client->ports_list_head, list) { if (p->capability & SNDRV_SEQ_PORT_CAP_INACTIVE) continue; - snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c)\n", + snd_iprintf(buffer, " Port %3d : \"%s\" (%c%c%c%c) [%s]\n", p->addr.port, p->name, FLAG_PERM_RD(p->capability), FLAG_PERM_WR(p->capability), FLAG_PERM_EX(p->capability), - FLAG_PERM_DUPLEX(p->capability)); + FLAG_PERM_DUPLEX(p->capability), + port_direction_name(p->direction)); snd_seq_info_dump_subscribers(buffer, &p->c_src, 1, " Connecting To: "); snd_seq_info_dump_subscribers(buffer, &p->c_dest, 0, " Connected From: "); } |