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A simple typo fix: midi2_probe => midi2_ump_probe.
Fixes: febdfa0e9c8a ("ALSA: docs: Update MIDI 2.0 documentation for UMP 1.1 enhancement")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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Fix the missing missing backquote that caused a sphinx warning:
Documentation/sound/designs/midi-2.0.rst:517: WARNING: Inline interpreted text or phrase reference start-string without end-string.
Fixes: e240cff9e6e9 ("ALSA: documentation: Add description for USB MIDI 2.0 gadget driver")
Reported-by: Stephen Rothwell <[email protected]>
Closes: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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The USB MIDI 2.0 gadget driver is now supported for 6.6 kernel, and
here we show a brief instruction how to enable and use it.
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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For gapless playback it is possible that each track can have different
codec profile with same decoder, for example we have WMA album,
we may have different tracks as WMA v9, WMA v10 and so on
Or if DSP's like QDSP have abililty to switch decoders on single stream
for each track, then this call could be used to set new codec parameters.
Existing code does not allow to change this profile while doing gapless
playback.
Reuse existing SNDRV_COMPRESS_SET_PARAMS to set this new track params along
some additional checks to enforce proper state machine.
With this new changes now the user can call SNDRV_COMPRESS_SET_PARAMS
anytime after setting next track and additional check in write should
also ensure that params are set before writing new data.
Signed-off-by: Srinivas Kandagatla <[email protected]>
Acked-by: Vinod Koul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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There have been a few enhancements for the new UMP 1.1 features.
Update the documentation accordingly.
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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Add the brief document for describing the MIDI 2.0 implementation on
Linux kernel. Both rawmidi and sequencer API extensions are
described.
Acked-by: Jaroslav Kysela <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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Correct spelling problems for Documentation/sound/ as reported
by codespell.
Signed-off-by: Randy Dunlap <[email protected]>
Cc: Jaroslav Kysela <[email protected]>
Cc: Takashi Iwai <[email protected]>
Cc: [email protected]
Cc: Jonathan Corbet <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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change 'cannel' to 'channel'
Signed-off-by: Sunrisepeak <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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This change adds audio jack injection feature through debugfs, with
this feature, we could validate alsa userspace changes by injecting
plugin or plugout events to the non-phantom audio jacks.
With this change, the sound core will build the folders
$debugfs_mount_dir/sound/cardN if SND_DEBUG and DEBUG_FS are enabled.
And if users also enable the SND_JACK_INJECTION_DEBUG, the jack
injection nodes will be built in the folder cardN like below:
$tree $debugfs_mount_dir/sound
$debugfs_mount_dir/sound
├── card0
│ ├── HDMI_DP_pcm_10_Jack
│ │ ├── jackin_inject
│ │ ├── kctl_id
│ │ ├── mask_bits
│ │ ├── status
│ │ ├── sw_inject_enable
│ │ └── type
...
│ └── HDMI_DP_pcm_9_Jack
│ ├── jackin_inject
│ ├── kctl_id
│ ├── mask_bits
│ ├── status
│ ├── sw_inject_enable
│ └── type
└── card1
├── HDMI_DP_pcm_5_Jack
│ ├── jackin_inject
│ ├── kctl_id
│ ├── mask_bits
│ ├── status
│ ├── sw_inject_enable
│ └── type
...
├── Headphone_Jack
│ ├── jackin_inject
│ ├── kctl_id
│ ├── mask_bits
│ ├── status
│ ├── sw_inject_enable
│ └── type
└── Headset_Mic_Jack
├── jackin_inject
├── kctl_id
├── mask_bits
├── status
├── sw_inject_enable
└── type
The nodes kctl_id, mask_bits, status and type are read-only, users
could check jack or jack_kctl's information through them.
The nodes sw_inject_enable and jackin_inject are directly used for
injection. The sw_inject_enable is read-write, users could check if
software injection is enabled or not on this jack, and users could
echo 1 or 0 to enable or disable software injection on this jack. Once
the injection is enabled, the jack will not change by hardware events
anymore, once the injection is disabled, the jack will restore the
last reported hardware events to the jack. The jackin_inject is
write-only, if the injection is enabled, users could echo 1 or 0 to
this node to inject plugin or plugout events to this jack.
For the detailed usage information on these nodes, please refer to
Documentation/sound/designs/jack-injection.rst.
Reviewed-by: Takashi Iwai <[email protected]>
Reviewed-by: Jaroslav Kysela <[email protected]>
Reviewed-by: Kai Vehmanen <[email protected]>
Signed-off-by: Hui Wang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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The :c:type:`foo` only works properly with structs before
Sphinx 3.x.
On Sphinx 3.x, structs should now be declared using the
.. c:struct, and referenced via :c:struct tag.
As we now have the automarkup.py macro, that automatically
convert:
struct foo
into cross-references, let's get rid of that, solving
several warnings when building docs with Sphinx 3.x.
Reviewed-by: André Almeida <[email protected]> # blk-mq.rst
Reviewed-by: Takashi Iwai <[email protected]> # sound
Reviewed-by: Mike Rapoport <[email protected]>
Reviewed-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
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We use HDaudio and HDAudio, pick one to make searches easier.
No functionality change
Also fix timestamping typo in documentation.
Reported-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Pierre-Louis Bossart <[email protected]>
Reviewed-by: Bard Liao <[email protected]>
Reviewed-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Kai Vehmanen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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CONFIG_PCM_XRUN_DEBUG should be CONFIG_SND_PCM_XRUN_DEBUG
Signed-off-by: Julia Lawall <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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Also documented the galpess transitions. Please note that these are not
really stream states, but show how the stream steps in gapless mode
Signed-off-by: Vinod Koul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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So we had some discussions of the stream states, so I thought it is a
good idea to document the state transitions, so add it documentation
Reviewed-by: Charles Keepax <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
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In PCM interface/protocol for userspace, parameters of runtime for PCM
substream is decided by an interaction between applications and ALSA
PCM core. In former commits, some tracepoints were added to probe a part
of the interaction.
This commit adds a documentation about the interaction and the
tracepoints.
Signed-off-by: Takashi Sakamoto <[email protected]>
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a plain text file.
Put to designs subdirectory.
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a plain text file.
Put to designs subdirectory.
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a plain text file.
Put to designs subdirectory.
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a plain text file.
Put to designs subdirectory.
Signed-off-by: Takashi Iwai <[email protected]>
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Converted from an ancient plain HTML document. It's much readable now!
Put to designs subdirectory with a slight rename.
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a text file.
Put to designs subdirectory.
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a text file.
Put to designs subdirectory.
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a text file.
Put into designs subdirectory, although it's mostly relevant with
HD-audio.
Signed-off-by: Takashi Iwai <[email protected]>
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A simple conversion from a text file.
A new subidrectory, Documentation/sound/designs, was created to put
this document. The other API design and implementation docuemnts
will be put to that directory in later commits.
Signed-off-by: Takashi Iwai <[email protected]>
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