diff options
Diffstat (limited to 'sound/virtio/virtio_pcm.c')
| -rw-r--r-- | sound/virtio/virtio_pcm.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sound/virtio/virtio_pcm.c b/sound/virtio/virtio_pcm.c index e16567e2e214..2dcd763efa29 100644 --- a/sound/virtio/virtio_pcm.c +++ b/sound/virtio/virtio_pcm.c @@ -353,6 +353,8 @@ int virtsnd_pcm_parse_cfg(struct virtio_snd *snd) vss->snd = snd; vss->sid = i; INIT_WORK(&vss->elapsed_period, virtsnd_pcm_period_elapsed); + init_waitqueue_head(&vss->msg_empty); + spin_lock_init(&vss->lock); rc = virtsnd_pcm_build_hw(vss, &info[i]); if (rc) @@ -477,3 +479,33 @@ int virtsnd_pcm_build_devs(struct virtio_snd *snd) return 0; } + +/** + * virtsnd_pcm_event() - Handle the PCM device event notification. + * @snd: VirtIO sound device. + * @event: VirtIO sound event. + * + * Context: Interrupt context. + */ +void virtsnd_pcm_event(struct virtio_snd *snd, struct virtio_snd_event *event) +{ + struct virtio_pcm_substream *vss; + u32 sid = le32_to_cpu(event->data); + + if (sid >= snd->nsubstreams) + return; + + vss = &snd->substreams[sid]; + + switch (le32_to_cpu(event->hdr.code)) { + case VIRTIO_SND_EVT_PCM_PERIOD_ELAPSED: + /* TODO: deal with shmem elapsed period */ + break; + case VIRTIO_SND_EVT_PCM_XRUN: + spin_lock(&vss->lock); + if (vss->xfer_enabled) + vss->xfer_xrun = true; + spin_unlock(&vss->lock); + break; + } +} |