pipeline: allow render pipeline to recover from xrun

Fixes pipeline's ability to recover from xrun for render streams.
Normally for render the ppl task is scheduled after trigger start,
but in this case trigger start is done on current's task level.

Signed-off-by: Tomasz Lauda <tomasz.lauda@linux.intel.com>

Author: tlauda

src/audio/pipeline.c

@@ -1061,6 +1061,22 @@ void pipeline_xrun(struct pipeline *p, struct comp_dev *dev,
 	}
 }
 
+/* copy data from upstream source endpoints to downstream endpoints*/
+static int pipeline_copy(struct comp_dev *dev)
+{
+	int err;
+
+	err = pipeline_copy_from_upstream(dev, dev);
+	if (err < 0)
+		return err;
+
+	err = pipeline_copy_to_downstream(dev, dev);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
 /* recover the pipeline from a XRUN condition */
 static int pipeline_xrun_recover(struct pipeline *p)
 {
@@ -1090,6 +1106,17 @@ static int pipeline_xrun_recover(struct pipeline *p)
 		return ret;
 	}
 
+	/* for playback copy it here, because scheduling won't work
+	 * on this interrupt level
+	 */
+	if (p->sched_comp->params.direction == SOF_IPC_STREAM_PLAYBACK) {
+		ret = pipeline_copy(p->sched_comp);
+		if (ret < 0) {
+			trace_pipe_error("px3");
+			return ret;
+		}
+	}
+
 	return 0;
 }
 
@@ -1125,25 +1152,15 @@ static void pipeline_task(void *arg)
 	if (p->xrun_bytes) {
 		err = pipeline_xrun_recover(p);
 		if (err < 0)
-			return;  /* failed - host will stop this pipeline */
-		goto sched;
-	}
-
-	/* copy data from upstream source endpoints to downstream endpoints */
-	err = pipeline_copy_from_upstream(dev, dev);
-	if (err < 0) {
-		err = pipeline_xrun_recover(p);
-		if (err < 0)
-			return;  /* failed - host will stop this pipeline */
+			return; /* failed - host will stop this pipeline */
 		goto sched;
 	}
 
-	err = pipeline_copy_to_downstream(dev, dev);
+	err = pipeline_copy(dev);
 	if (err < 0) {
 		err = pipeline_xrun_recover(p);
 		if (err < 0)
-			return;  /* failed - host will stop this pipeline */
-		goto sched;
+			return; /* failed - host will stop this pipeline */
 	}
 
 sched: