diff options
| author | Anton Yakovlev <anton.yakovlev@opensynergy.com> | 2021-03-02 17:47:04 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-03-07 09:07:35 +0100 |
| commit | 29b96bf50ba958eb5f097cdc3fbd4c1acf9547a2 (patch) | |
| tree | 09d7e5e39da138635f43a967b302ff85013c6b54 /sound/virtio/virtio_card.c | |
| parent | 9d45e514da88ff74fc24ffb34e7d6eb92576440b (diff) | |
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>
Diffstat (limited to 'sound/virtio/virtio_card.c')
| -rw-r--r-- | sound/virtio/virtio_card.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sound/virtio/virtio_card.c b/sound/virtio/virtio_card.c index b757b2444078..11c76ee311b7 100644 --- a/sound/virtio/virtio_card.c +++ b/sound/virtio/virtio_card.c @@ -209,6 +209,16 @@ static int virtsnd_build_devs(struct virtio_snd *snd) VIRTIO_SND_CARD_NAME " at %s/%s", dev_name(dev->parent), dev_name(dev)); + rc = virtsnd_pcm_parse_cfg(snd); + if (rc) + return rc; + + if (snd->nsubstreams) { + rc = virtsnd_pcm_build_devs(snd); + if (rc) + return rc; + } + return snd_card_register(snd->card); } @@ -237,6 +247,9 @@ static int virtsnd_validate(struct virtio_device *vdev) return -EINVAL; } + if (virtsnd_pcm_validate(vdev)) + return -EINVAL; + return 0; } @@ -259,6 +272,7 @@ static int virtsnd_probe(struct virtio_device *vdev) snd->vdev = vdev; INIT_LIST_HEAD(&snd->ctl_msgs); + INIT_LIST_HEAD(&snd->pcm_list); vdev->priv = snd; @@ -293,6 +307,7 @@ on_exit: static void virtsnd_remove(struct virtio_device *vdev) { struct virtio_snd *snd = vdev->priv; + unsigned int i; virtsnd_disable_event_vq(snd); virtsnd_ctl_msg_cancel_all(snd); @@ -303,6 +318,9 @@ static void virtsnd_remove(struct virtio_device *vdev) vdev->config->del_vqs(vdev); vdev->config->reset(vdev); + for (i = 0; snd->substreams && i < snd->nsubstreams; ++i) + cancel_work_sync(&snd->substreams[i].elapsed_period); + kfree(snd->event_msgs); } |