commit c358e640a669b528b32af5442c92b856de623e1c
author Dimitris Papastamos <dp@opensource.wolfsonmicro.com> Fri Jan 21 15:29:02 2011 +0000
committer Mark Brown <broonie@opensource.wolfsonmicro.com> Fri Jan 21 18:30:51 2011 +0000
tree c40ceac6b635e6fdb00ee8eb4c5ab96044ca7503
parent 67b22517d8e48a97e1d2ab10d095c538bbb2374c

ASoC: soc-cache: Add trace event for snd_soc_cache_sync()

This patch makes it easy to see when the syncing process begins and
ends.  You can also enable the snd_soc_reg_write tracepoint to see
which registers are being synced.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/soc-cache.c

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index f834839..db66dc4 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -18,6 +18,8 @@
 #include <linux/bitmap.h>
 #include <linux/rbtree.h>
 
+#include <trace/events/asoc.h>
+
 static unsigned int snd_soc_4_12_read(struct snd_soc_codec *codec,
 				     unsigned int reg)
 {
@@ -1601,18 +1603,26 @@
 int snd_soc_cache_sync(struct snd_soc_codec *codec)
 {
 	int ret;
+	const char *name;
 
 	if (!codec->cache_sync) {
 		return 0;
 	}
 
+	if (codec->cache_ops->name)
+		name = codec->cache_ops->name;
+	else
+		name = "unknown";
+
 	if (codec->cache_ops && codec->cache_ops->sync) {
 		if (codec->cache_ops->name)
 			dev_dbg(codec->dev, "Syncing %s cache for %s codec\n",
 				codec->cache_ops->name, codec->name);
+		trace_snd_soc_cache_sync(codec, name, "start");
 		ret = codec->cache_ops->sync(codec);
 		if (!ret)
 			codec->cache_sync = 0;
+		trace_snd_soc_cache_sync(codec, name, "end");
 		return ret;
 	}