1 files changed, 56 insertions, 12 deletions

diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h
index bc88d6f964da..d91289c6f00e 100644
--- a/include/sound/compress_driver.h
+++ b/include/sound/compress_driver.h
@@ -23,7 +23,6 @@ struct snd_compr_ops;
  * struct snd_compr_runtime: runtime stream description
  * @state: stream state
  * @ops: pointer to DSP callbacks
- * @dma_buffer_p: runtime dma buffer pointer
  * @buffer: pointer to kernel buffer, valid only when not in mmap mode or
  *	DSP doesn't implement copy
  * @buffer_size: size of the above buffer
@@ -34,11 +33,14 @@ struct snd_compr_ops;
  * @total_bytes_transferred: cumulative bytes transferred by offload DSP
  * @sleep: poll sleep
  * @private_data: driver private data pointer
+ * @dma_area: virtual buffer address
+ * @dma_addr: physical buffer address (not accessible from main CPU)
+ * @dma_bytes: size of DMA area
+ * @dma_buffer_p: runtime dma buffer pointer
  */
 struct snd_compr_runtime {
 	snd_pcm_state_t state;
 	struct snd_compr_ops *ops;
-	struct snd_dma_buffer *dma_buffer_p;
 	void *buffer;
 	u64 buffer_size;
 	u32 fragment_size;
@@ -47,6 +49,11 @@ struct snd_compr_runtime {
 	u64 total_bytes_transferred;
 	wait_queue_head_t sleep;
 	void *private_data;
+
+	unsigned char *dma_area;
+	dma_addr_t dma_addr;
+	size_t dma_bytes;
+	struct snd_dma_buffer *dma_buffer_p;
 };
 
 /**
@@ -59,7 +66,10 @@ 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
+ * @pause_in_draining: paused during draining state, true when set
  * @private_data: pointer to DSP private data
+ * @dma_buffer: allocated buffer if any
  */
 struct snd_compr_stream {
 	const char *name;
@@ -70,7 +80,10 @@ struct snd_compr_stream {
 	enum snd_compr_direction direction;
 	bool metadata_set;
 	bool next_track;
+	bool partial_drain;
+	bool pause_in_draining;
 	void *private_data;
+	struct snd_dma_buffer dma_buffer;
 };
 
 /**
@@ -131,6 +144,7 @@ struct snd_compr_ops {
  * @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;
@@ -141,6 +155,7 @@ struct snd_compr {
 	unsigned int direction;
 	struct mutex lock;
 	int device;
+	bool use_pause_in_draining;
 #ifdef CONFIG_SND_VERBOSE_PROCFS
 	/* private: */
 	char id[64];
@@ -150,11 +165,21 @@ struct snd_compr {
 };
 
 /* compress device register APIs */
-int snd_compress_register(struct snd_compr *device);
-int snd_compress_deregister(struct snd_compr *device);
 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
@@ -173,28 +198,47 @@ 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);
 }
 
 /**
  * snd_compr_set_runtime_buffer - Set the Compress runtime buffer
- * @substream: compress substream to set
+ * @stream: compress stream to set
  * @bufp: the buffer information, NULL to clear
  *
  * Copy the buffer information to runtime buffer when @bufp is non-NULL.
  * Otherwise it clears the current buffer information.
  */
-static inline void snd_compr_set_runtime_buffer(
-					struct snd_compr_stream *substream,
-					struct snd_dma_buffer *bufp)
+static inline void
+snd_compr_set_runtime_buffer(struct snd_compr_stream *stream,
+			     struct snd_dma_buffer *bufp)
 {
-	struct snd_compr_runtime *runtime = substream->runtime;
-
-	runtime->dma_buffer_p = bufp;
+	struct snd_compr_runtime *runtime = stream->runtime;
+
+	if (bufp) {
+		runtime->dma_buffer_p = bufp;
+		runtime->dma_area = bufp->area;
+		runtime->dma_addr = bufp->addr;
+		runtime->dma_bytes = bufp->bytes;
+	} else {
+		runtime->dma_buffer_p = NULL;
+		runtime->dma_area = NULL;
+		runtime->dma_addr = 0;
+		runtime->dma_bytes = 0;
+	}
 }
 
+int snd_compr_malloc_pages(struct snd_compr_stream *stream, size_t size);
+int snd_compr_free_pages(struct snd_compr_stream *stream);
+
 int snd_compr_stop_error(struct snd_compr_stream *stream,
 			 snd_pcm_state_t state);