diff options
| author | Takashi Iwai <tiwai@suse.de> | 2025-01-10 18:59:34 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2025-01-12 15:12:20 +0300 |
| commit | bdf46443f350dd5d226fd528a5a5954ff762f591 (patch) | |
| tree | ae3e0c2b0c92a107b02f0f77237a2ab75259055f /include | |
| parent | 7579790915387396e26041ceafbc07348658edef (diff) | |
| download | linux-bdf46443f350dd5d226fd528a5a5954ff762f591.tar.xz | |
ALSA: rawmidi: Expose the tied device number in info ioctl
The UMP legacy rawmidi is derived from the UMP rawmidi, but currently
there is no way to know which device is involved in other side.
This patch extends the rawmidi info ioctl to show the tied device
number. As default it stores -1, indicating that no tied device.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250110155943.31578-2-tiwai@suse.de
Diffstat (limited to 'include')
| -rw-r--r-- | include/sound/rawmidi.h | 1 | ||||
| -rw-r--r-- | include/uapi/sound/asound.h | 5 |
2 files changed, 5 insertions, 1 deletions
diff --git a/include/sound/rawmidi.h b/include/sound/rawmidi.h index f31cabf0158c..7f1fec786b72 100644 --- a/include/sound/rawmidi.h +++ b/include/sound/rawmidi.h @@ -118,6 +118,7 @@ struct snd_rawmidi { struct list_head list; unsigned int device; /* device number */ unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */ + unsigned int tied_device; char id[64]; char name[80]; diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h index 4cd513215bcd..1fcff031b5e3 100644 --- a/include/uapi/sound/asound.h +++ b/include/uapi/sound/asound.h @@ -729,6 +729,8 @@ enum { #define SNDRV_RAWMIDI_INFO_DUPLEX 0x00000004 #define SNDRV_RAWMIDI_INFO_UMP 0x00000008 +#define SNDRV_RAWMIDI_DEVICE_UNKNOWN -1 + struct snd_rawmidi_info { unsigned int device; /* RO/WR (control): device number */ unsigned int subdevice; /* RO/WR (control): subdevice number */ @@ -740,7 +742,8 @@ struct snd_rawmidi_info { unsigned char subname[32]; /* name of active or selected subdevice */ unsigned int subdevices_count; unsigned int subdevices_avail; - unsigned char reserved[64]; /* reserved for future use */ + int tied_device; /* R: tied rawmidi device (UMP/legacy) */ + unsigned char reserved[60]; /* reserved for future use */ }; #define SNDRV_RAWMIDI_MODE_FRAMING_MASK (7<<0) |