ALSA: virtio: build PCM devices and substream hardware descriptors

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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>

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Anton Yakovlev 2021-03-02 17:47:04 +01:00 • committed by Takashi Iwai

parent 9d45e514da

commit 29b96bf50b

5 changed files with 581 additions and 1 deletions

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3

sound/virtio/Makefile

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18

sound/virtio/virtio_card.c

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10

sound/virtio/virtio_card.h

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479

sound/virtio/virtio_pcm.c

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72

sound/virtio/virtio_pcm.h

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