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Takashi Iwai 6389f2c135 ALSA: seq: Add UMP support 
[ Upstream commit 46397622a3 ]

Starting from this commit, we add the basic support of UMP (Universal
MIDI Packet) events on ALSA sequencer infrastructure.  The biggest
change here is that, for transferring UMP packets that are up to 128
bits, we extend the data payload of ALSA sequencer event record when
the client is declared to support for the new UMP events.

A new event flag bit, SNDRV_SEQ_EVENT_UMP, is defined and it shall be
set for the UMP packet events that have the larger payload of 128
bits, defined as struct snd_seq_ump_event.

For controlling the UMP feature enablement in kernel, a new Kconfig,
CONFIG_SND_SEQ_UMP is introduced.  The extended event for UMP is
available only when this Kconfig item is set.  Similarly, the size of
the internal snd_seq_event_cell also increases (in 4 bytes) when the
Kconfig item is set.  (But the size increase is effective only for
32bit architectures; 64bit archs already have padding there.)
Overall, when CONFIG_SND_SEQ_UMP isn't set, there is no change in the
event and cell, keeping the old sizes.

For applications that want to access the UMP packets, first of all, a
sequencer client has to declare the user-protocol to match with the
latest one via the new SNDRV_SEQ_IOCTL_USER_PVERSION; otherwise it's
treated as if a legacy client without UMP support.

Then the client can switch to the new UMP mode (MIDI 1.0 or MIDI 2.0)
with a new field, midi_version, in snd_seq_client_info.  When switched
to UMP mode (midi_version = 1 or 2), the client can write the UMP
events with SNDRV_SEQ_EVENT_UMP flag.  For reads, the alignment size
is changed from snd_seq_event (28 bytes) to snd_seq_ump_event (32
bytes).  When a UMP sequencer event is delivered to a legacy sequencer
client, it's ignored or handled as an error.

Conceptually, ALSA sequencer client and port correspond to the UMP
Endpoint and Group, respectively; each client may have multiple ports
and each port has the fixed number (16) of channels, total up to 256
channels.

As of this commit, ALSA sequencer core just sends and receives the UMP
events as-is from/to clients.  The automatic conversions between the
legacy events and the new UMP events will be implemented in a later
patch.

Along with this commit, bump the sequencer protocol version to 1.0.3.

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Link: https://lore.kernel.org/r/20230523075358.9672-26-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Stable-dep-of: 705dd6dcbc ("ALSA: seq: Clear variable event pointer on read")
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-07-24 15:51:33 +02:00
..
ac97 ASoC: ac97: convert to SPDX identifiers 2018-07-02 10:56:09 +01:00
sof ASoC: SOF: ext_manifest: use explicit number for elem_type 2021-02-10 17:17:13 +00:00
ac97_codec.h ALSA: ac97: Treat snd_ac97_bus_ops as const 2020-01-03 09:24:08 +01:00
aci.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ad1816a.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ad1843.h ALSA: ALSA driver for SGI O2 audio board 2008-07-14 09:01:02 +02:00
adau1373.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 149 2019-05-30 11:25:18 -07:00
ak4xxx-adda.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ak4113.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ak4114.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ak4117.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ak4531_codec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ak4641.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
alc5623.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
asequencer.h ALSA: seq: Add UMP support 2026-07-24 15:51:33 +02:00
asound.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
asoundef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
compress_driver.h ALSA: compress: Drop unused functions 2021-07-15 10:22:30 +02:00
control.h ALSA: control: Use deferred fasync helper 2022-08-25 11:40:44 +02:00
core.h ALSA: core: Add async signal helpers 2022-08-25 11:40:44 +02:00
cs35l33.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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cs35l35.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cs35l36.h ASoC: cs35l36: Add support for Cirrus CS35L36 Amplifier 2019-02-08 13:00:28 +00:00
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da7219-aad.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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da9055.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
designware_i2s.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
dmaengine_pcm.h ALSA: dmaengine: Synchronize dma channel after drop() 2024-07-27 10:46:11 +02:00
emu10k1.h ALSA: emu10k1: Allocate resources with device-managed APIs 2021-07-19 16:16:56 +02:00
emu10k1_synth.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
emu8000.h ALSA: sb: Allocate resources with device-managed APIs 2021-07-19 16:17:14 +02:00
emu8000_reg.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
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emux_synth.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
es1688.h ALSA: es1688: Avoid devres management for es1688 object creation 2021-08-05 08:24:17 +02:00
graph_card.h ASoC: audio-graph: move audio_graph_remove() to simple-card-utils.c 2021-04-20 17:25:45 +01:00
gus.h ALSA: isa/gus: remove -Wmissing-prototypes warnings 2020-07-07 11:59:59 +02:00
hda_chmap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hda_codec.h ALSA: hda: Fix potential deadlock at codec unbinding 2022-01-27 11:04:05 +01:00
hda_component.h i915/snd_hdac: I915 subcomponent for the snd_hdac 2019-02-08 16:58:59 +01:00
hda_hwdep.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 32 2019-05-24 17:27:10 +02:00
hda_i915.h ALSA: hda: Make audio component support more generic 2018-07-17 22:25:48 +02:00
hda_register.h ALSA: hda: Change AZX_MAX_BUF_SIZE from 1GB to 4MB 2021-03-19 16:54:58 +01:00
hda_regmap.h ALSA: hda: Manage concurrent reg access more properly 2020-01-13 13:40:41 +01:00
hda_verbs.h ALSA: hda: add verbs for stripe control 2019-01-14 19:52:23 +01:00
hdaudio.h ALSA: hda: add snd_hdac_stop_streams() helper 2022-12-31 13:14:44 +01:00
hdaudio_ext.h ALSA/ASoC: hda: move/rename snd_hdac_ext_stop_streams to hdac_stream.c 2022-12-31 13:14:44 +01:00
hdmi-codec.h ASoC: hdmi-codec: Add a prepare hook 2021-06-10 11:48:56 +02:00
hwdep.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
i2c.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
info.h ALSA: info: Make snd_info_entry_ops as const 2020-01-03 09:24:18 +01:00
initval.h ALSA: Allow const arrays for legacy resource management helpers 2020-01-05 16:14:26 +01:00
intel-dsp-config.h ALSA: hda: intel-dsp-config: add helper for ACPI DSP driver selection 2020-11-19 18:24:35 +00:00
intel-nhlt.h ALSA: hda: intel-nhlt: verify config type 2021-03-02 10:22:47 +01:00
jack.h ALSA: jack: Access input_dev under mutex 2022-06-09 10:22:32 +02:00
l3.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
madera-pdata.h ASoC: madera: Update SPDX headers 2019-06-26 12:27:50 +01:00
max9768.h ASoC: max9768: add driver for max9768 amplifier 2012-01-30 21:50:55 +00:00
max98088.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
max98090.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
max98095.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
memalloc.h ALSA: memalloc: Correctly name as WC 2021-08-04 08:07:58 +02:00
minors.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mixer_oss.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
mpu401.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
omap-hdmi-audio.h ALSA: Replace HTTP links with HTTPS ones 2020-07-19 20:49:25 +02:00
opl3.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
opl4.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pcm-indirect.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
pcm.h ALSA: pcm: Improve the fix for race of buffer access at PCM OSS layer 2026-02-06 16:41:47 +01:00
pcm_drm_eld.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcm_iec958.h ALSA: iec958: Split status creation and fill 2021-06-08 17:05:41 +02:00
pcm_oss.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pcm_params.h ALSA: pcm: Remove unused inline function snd_mask_sizeof 2020-09-09 18:43:07 +02:00
pt2258.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pxa2xx-lib.h ALSA: pxa2xx: Use managed PCM buffer allocation 2021-08-04 08:08:21 +02:00
rawmidi.h ALSA: rawmidi: introduce SNDRV_RAWMIDI_IOCTL_USER_PVERSION 2021-09-23 09:26:40 +02:00
rt286.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
rt298.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
rt1015.h ASoC: rt1015: add delay to fix pop noise from speaker 2020-11-05 17:25:17 +00:00
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rt5682.h ASoC: rt5682: Add a new property for the DMIC clock driving 2020-11-13 14:22:09 +00:00
s3c24xx_uda134x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
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seq_device.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
seq_kernel.h ALSA: seq: Add UMP support 2026-07-24 15:51:33 +02:00
seq_midi_emul.h ALSA: seq: Constify struct snd_midi_op 2020-01-03 09:24:19 +01:00
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simple_card.h ASoC: simple-card: convert to SPDX identifiers 2018-07-02 10:52:47 +01:00
simple_card_utils.h ASoC: audio-graph: move audio_graph_remove() to simple-card-utils.c 2021-04-20 17:25:45 +01:00
snd_wavefront.h ALSA: wavefront: Use standard print API 2026-01-19 13:10:06 +01:00
soc-acpi-intel-match.h ASoC: Intel: common: add ACPI matching tables for Alder Lake 2020-12-09 16:52:04 +00:00
soc-acpi.h ASoC: soc-acpi: add new fields for mach_params 2021-04-12 17:05:51 +01:00
soc-card.h ASoC: soc-card: Add storage for PCI SSID 2023-11-28 16:56:17 +00:00
soc-component.h ASoC: soc-utils: add snd_soc_component_is_dummy() 2021-04-16 14:34:12 +01:00
soc-dai.h ASoC: soc-dai.h: merge DAI call back functions into ops 2025-08-28 16:24:26 +02:00
soc-dapm.h ASoC: soc-dapm.h: fixup warning struct snd_pcm_substream not declared 2023-03-10 09:39:31 +01:00
soc-dpcm.h ASoC: soc-pcm: test if a BE can be prepared 2023-06-21 15:59:13 +02:00
soc-jack.h ASoC: add soc-jack.h 2020-11-30 12:54:02 +00:00
soc-link.h ASoC: soc-pcm: care trigger rollback 2020-12-09 12:13:38 +00:00
soc-topology.h ASoC: topology: Fix stub for snd_soc_tplg_component_remove() 2021-11-18 19:16:55 +01:00
soc.h ASoC: core: Do not call link_exit() on uninitialized rtd objects 2026-04-18 10:33:12 +02:00
sof.h ASoC: SOF: add a helper to get topology configured bclk 2021-07-11 23:48:30 +01:00
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