[v5,3/3] ALSA: compress: fix partial_drain completion state
diff mbox series

Message ID 20200629134737.105993-4-vkoul@kernel.org
State New
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Series
  • ALSA: compress: Document stream states and fix gapless SM
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Commit Message

Vinod Koul June 29, 2020, 1:47 p.m. UTC
On partial_drain completion we should be in SNDRV_PCM_STATE_RUNNING
state, so set that for partially draining streams in
snd_compr_drain_notify() and use a flag for partially draining streams

While at it, add locks for stream state change in
snd_compr_drain_notify() as well.

Fixes: f44f2a5417b2 ("ALSA: compress: fix drain calls blocking other compress functions (v6)")
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 include/sound/compress_driver.h | 10 +++++++++-
 sound/core/compress_offload.c   |  4 ++++
 2 files changed, 13 insertions(+), 1 deletion(-)

Comments

Charles Keepax July 1, 2020, 2:20 p.m. UTC | #1
On Mon, Jun 29, 2020 at 07:17:37PM +0530, Vinod Koul wrote:
> On partial_drain completion we should be in SNDRV_PCM_STATE_RUNNING
> state, so set that for partially draining streams in
> snd_compr_drain_notify() and use a flag for partially draining streams
> 
> While at it, add locks for stream state change in
> snd_compr_drain_notify() as well.
> 
> Fixes: f44f2a5417b2 ("ALSA: compress: fix drain calls blocking other compress functions (v6)")
> Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---

Worth noting I haven't actually tested the gapless, but keeps all
the compressed capture stuff happy.

Tested-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>

Thanks,
Charles
Vinod Koul July 1, 2020, 3:04 p.m. UTC | #2
On 01-07-20, 14:20, Charles Keepax wrote:
> On Mon, Jun 29, 2020 at 07:17:37PM +0530, Vinod Koul wrote:
> > On partial_drain completion we should be in SNDRV_PCM_STATE_RUNNING
> > state, so set that for partially draining streams in
> > snd_compr_drain_notify() and use a flag for partially draining streams
> > 
> > While at it, add locks for stream state change in
> > snd_compr_drain_notify() as well.
> > 
> > Fixes: f44f2a5417b2 ("ALSA: compress: fix drain calls blocking other compress functions (v6)")
> > Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> > Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > ---
> 
> Worth noting I haven't actually tested the gapless, but keeps all
> the compressed capture stuff happy.

Thanks for testing and review Charles. 

Btw Srini is adding support to fcplay so that we can do gapless testing
without using HALs/players. Now that we have an public board (RB3) where
compress works out of box, we should build more things on top :)
Takashi Iwai July 7, 2020, 9:55 a.m. UTC | #3
On Mon, 29 Jun 2020 15:47:37 +0200,
Vinod Koul wrote:
> 
> On partial_drain completion we should be in SNDRV_PCM_STATE_RUNNING
> state, so set that for partially draining streams in
> snd_compr_drain_notify() and use a flag for partially draining streams
> 
> While at it, add locks for stream state change in
> snd_compr_drain_notify() as well.
> 
> Fixes: f44f2a5417b2 ("ALSA: compress: fix drain calls blocking other compress functions (v6)")
> Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>

Applied this one to for-linus branch (while other two are for 5.9), as
this is a fix.


thanks,

Takashi

Patch
diff mbox series

diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index 3df8d8c90191..8d23351f7ad7 100644
--- a/include/sound/compress_driver.h
+++ b/include/sound/compress_driver.h
@@ -66,6 +66,7 @@  struct snd_compr_runtime {
  * @direction: stream direction, playback/recording
  * @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
  * @private_data: pointer to DSP private data
  * @dma_buffer: allocated buffer if any
  */
@@ -78,6 +79,7 @@  struct snd_compr_stream {
 	enum snd_compr_direction direction;
 	bool metadata_set;
 	bool next_track;
+	bool partial_drain;
 	void *private_data;
 	struct snd_dma_buffer dma_buffer;
 };
@@ -187,7 +189,13 @@  static inline void snd_compr_drain_notify(struct snd_compr_stream *stream)
 	if (snd_BUG_ON(!stream))
 		return;
 
-	stream->runtime->state = SNDRV_PCM_STATE_SETUP;
+	/* for partial_drain case we are back to running state on success */
+	if (stream->partial_drain) {
+		stream->runtime->state = SNDRV_PCM_STATE_RUNNING;
+		stream->partial_drain = false; /* clear this flag as well */
+	} else {
+		stream->runtime->state = SNDRV_PCM_STATE_SETUP;
+	}
 
 	wake_up(&stream->runtime->sleep);
 }
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c
index e618580feac4..1c4b2cf450a0 100644
--- a/sound/core/compress_offload.c
+++ b/sound/core/compress_offload.c
@@ -803,6 +803,9 @@  static int snd_compr_stop(struct snd_compr_stream *stream)
 
 	retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_STOP);
 	if (!retval) {
+		/* clear flags and stop any drain wait */
+		stream->partial_drain = false;
+		stream->metadata_set = false;
 		snd_compr_drain_notify(stream);
 		stream->runtime->total_bytes_available = 0;
 		stream->runtime->total_bytes_transferred = 0;
@@ -960,6 +963,7 @@  static int snd_compr_partial_drain(struct snd_compr_stream *stream)
 	if (stream->next_track == false)
 		return -EPERM;
 
+	stream->partial_drain = true;
 	retval = stream->ops->trigger(stream, SND_COMPR_TRIGGER_PARTIAL_DRAIN);
 	if (retval) {
 		pr_debug("Partial drain returned failure\n");