* @metadata_set: metadata set flag, true when set
* @next_track: has userspace signal next track transition, true when set
* @partial_drain: undergoing partial_drain for stream, true when set
+ * @pause_in_draining: paused during draining state, true when set
* @private_data: pointer to DSP private data
* @dma_buffer: allocated buffer if any
*/
bool metadata_set;
bool next_track;
bool partial_drain;
+ bool pause_in_draining;
void *private_data;
struct snd_dma_buffer dma_buffer;
};
* @direction: Playback or capture direction
* @lock: device lock
* @device: device id
+ * @use_pause_in_draining: allow pause in draining, true when set
*/
struct snd_compr {
const char *name;
unsigned int direction;
struct mutex lock;
int device;
+ bool use_pause_in_draining;
#ifdef CONFIG_SND_VERBOSE_PROCFS
/* private: */
char id[64];
int snd_compress_new(struct snd_card *card, int device,
int type, const char *id, struct snd_compr *compr);
+/**
+ * snd_compr_use_pause_in_draining - Allow pause and resume in draining state
+ * @substream: compress substream to set
+ *
+ * Allow pause and resume in draining state.
+ * Only HW driver supports this transition can call this API.
+ */
+static inline void snd_compr_use_pause_in_draining(struct snd_compr_stream *substream)
+{
+ substream->device->use_pause_in_draining = true;
+}
+
/* dsp driver callback apis
* For playback: driver should call snd_compress_fragment_elapsed() to let the
* framework know that a fragment has been consumed from the ring buffer
{
int retval;
- if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING)
+ switch (stream->runtime->state) {
+ case SNDRV_PCM_STATE_RUNNING:
+ retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
+ if (!retval)
+ stream->runtime->state = SNDRV_PCM_STATE_PAUSED;
+ break;
+ case SNDRV_PCM_STATE_DRAINING:
+ if (!stream->device->use_pause_in_draining)
+ return -EPERM;
+ retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
+ if (!retval)
+ stream->pause_in_draining = true;
+ break;
+ default:
return -EPERM;
- retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_PUSH);
- if (!retval)
- stream->runtime->state = SNDRV_PCM_STATE_PAUSED;
+ }
return retval;
}
{
int retval;
- if (stream->runtime->state != SNDRV_PCM_STATE_PAUSED)
+ switch (stream->runtime->state) {
+ case SNDRV_PCM_STATE_PAUSED:
+ retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
+ if (!retval)
+ stream->runtime->state = SNDRV_PCM_STATE_RUNNING;
+ break;
+ case SNDRV_PCM_STATE_DRAINING:
+ if (!stream->pause_in_draining)
+ return -EPERM;
+ retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
+ if (!retval)
+ stream->pause_in_draining = false;
+ break;
+ default:
return -EPERM;
- retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
- if (!retval)
- stream->runtime->state = SNDRV_PCM_STATE_RUNNING;
+ }
return retval;
}
/* clear flags and stop any drain wait */
stream->partial_drain = false;
stream->metadata_set = false;
+ stream->pause_in_draining = false;
snd_compr_drain_notify(stream);
stream->runtime->total_bytes_available = 0;
stream->runtime->total_bytes_transferred = 0;