Commit Graph

10 Commits

Author SHA1 Message Date
Pierre-Louis Bossart e861431303 ALSA: virtio: fix kernel-doc
make W=1 warning:

sound/virtio/virtio_ctl_msg.c:70: warning: expecting prototype for
virtsnd_ctl_msg_request(). Prototype was for
virtsnd_ctl_msg_response() instead

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210426213902.234711-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-04-27 08:39:39 +02:00
Chen Huang d91cbe83d3 ALSA: virtio: use module_virtio_driver() to simplify the code
module_virtio_driver() makes the code simpler by eliminating
boilerplate code.

Signed-off-by: Chen Huang <chenhuang5@huawei.com>
Reviewed-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210408125429.1158703-1-chenhuang5@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-04-12 12:15:34 +02:00
Anton Yakovlev 575483e90a ALSA: virtio: introduce device suspend/resume support
All running PCM substreams are stopped on device suspend and restarted
on device resume.

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-10-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:08:39 +01:00
Anton Yakovlev 19325fedf2 ALSA: virtio: introduce PCM channel map support
Enumerate all available PCM channel maps and create ALSA controls.

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-9-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:08:20 +01:00
Anton Yakovlev ca61a41f38 ALSA: virtio: introduce jack support
Enumerate all available jacks and create ALSA controls.

At the moment jacks have a simple implementation and can only be used
to receive notifications about a plugged in/out device.

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-8-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:08:11 +01:00
Anton Yakovlev da76e9f3e4 ALSA: virtio: PCM substream operators
Introduce the operators required for the operation of substreams.

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-7-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:08:03 +01:00
Anton Yakovlev f40a28679e ALSA: virtio: handling control and I/O messages for the PCM device
The driver implements a message-based transport for I/O substream
operations. Before the start of the substream, the hardware buffer is
sliced into I/O messages, the number of which is equal to the current
number of periods. The size of each message is equal to the current
size of one period.

I/O messages are organized in an ordered queue. The completion of the
I/O message indicates an elapsed period (the only exception is the end
of the stream for the capture substream). Upon completion, the message
is automatically re-added to the end of the queue.

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-6-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:07:44 +01:00
Anton Yakovlev 29b96bf50b ALSA: virtio: build PCM devices and substream hardware descriptors
Like the HDA specification, the virtio sound device specification links
PCM substreams, jacks and PCM channel maps into functional groups. For
each discovered group, a PCM device is created, the number of which
coincides with the group number.

Introduce the module parameters for setting the hardware buffer
parameters:
  pcm_buffer_ms [=160]
  pcm_periods_min [=2]
  pcm_periods_max [=16]
  pcm_period_ms_min [=10]
  pcm_period_ms_max [=80]

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-5-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:07:35 +01:00
Anton Yakovlev 9d45e514da ALSA: virtio: handling control messages
The control queue can be used by different parts of the driver to send
commands to the device. Control messages can be either synchronous or
asynchronous. The lifetime of a message is controlled by a reference
count.

Introduce a module parameter to set the message completion timeout:
  msg_timeout_ms [=1000]

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-4-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:07:27 +01:00
Anton Yakovlev de3a9980d8 ALSA: virtio: add virtio sound driver
Introduce skeleton of the virtio sound driver. The driver implements
the virtio sound device specification, which has become part of the
virtio standard.

Initial initialization of the device, virtqueues and creation of an
empty ALSA sound device.

Signed-off-by: Anton Yakovlev <anton.yakovlev@opensynergy.com>
Link: https://lore.kernel.org/r/20210302164709.3142702-3-anton.yakovlev@opensynergy.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2021-03-07 09:07:16 +01:00