X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=sound%2Fhda%2Fhdac_stream.c;h=a314b03b4a4cb1696d87ee57d5f5ed8d21eecb26;hb=7557c1b3f715624f3bd4c809f03771ce9384eb7b;hp=682ed39f79b015a3982b6e149ff3bf1c0d3632b6;hpb=a345cc0d393edddde8e83aadf8be5223316442aa;p=linux.git

diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c
index 682ed39f79b0..a314b03b4a4c 100644
--- a/sound/hda/hdac_stream.c
+++ b/sound/hda/hdac_stream.c
@@ -590,7 +590,9 @@ EXPORT_SYMBOL_GPL(snd_hdac_stream_timecounter_init);
 /**
  * snd_hdac_stream_sync_trigger - turn on/off stream sync register
  * @azx_dev: HD-audio core stream (master stream)
+ * @set: true = set, false = clear
  * @streams: bit flags of streams to sync
+ * @reg: the stream sync register address
  */
 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
 				  unsigned int streams, unsigned int reg)
@@ -629,20 +631,27 @@ void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
 		nwait = 0;
 		i = 0;
 		list_for_each_entry(s, &bus->stream_list, list) {
-			if (streams & (1 << i)) {
-				if (start) {
-					/* check FIFO gets ready */
-					if (!(snd_hdac_stream_readb(s, SD_STS) &
-					      SD_STS_FIFO_READY))
-						nwait++;
-				} else {
-					/* check RUN bit is cleared */
-					if (snd_hdac_stream_readb(s, SD_CTL) &
-					    SD_CTL_DMA_START)
-						nwait++;
+			if (!(streams & (1 << i++)))
+				continue;
+
+			if (start) {
+				/* check FIFO gets ready */
+				if (!(snd_hdac_stream_readb(s, SD_STS) &
+				      SD_STS_FIFO_READY))
+					nwait++;
+			} else {
+				/* check RUN bit is cleared */
+				if (snd_hdac_stream_readb(s, SD_CTL) &
+				    SD_CTL_DMA_START) {
+					nwait++;
+					/*
+					 * Perform stream reset if DMA RUN
+					 * bit not cleared within given timeout
+					 */
+					if (timeout == 1)
+						snd_hdac_stream_reset(s);
 				}
 			}
-			i++;
 		}
 		if (!nwait)
 			break;