ALSA: hda - add hdac stream trace

Add the trace of snd_hdac_stream_start and snd_hdac_stream_stop.
Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/hda/hdac_stream.c

@@ -10,6 +10,7 @@
 #include <sound/pcm.h>
 #include <sound/hdaudio.h>
 #include <sound/hda_register.h>
+#include "trace.h"
 
 /**
  * snd_hdac_stream_init - initialize each stream (aka device)
@@ -48,6 +49,8 @@ void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start)
 {
 	struct hdac_bus *bus = azx_dev->bus;
 
+	trace_snd_hdac_stream_start(bus, azx_dev);
+
 	azx_dev->start_wallclk = snd_hdac_chip_readl(bus, WALLCLK);
 	if (!fresh_start)
 		azx_dev->start_wallclk -= azx_dev->period_wallclk;
@@ -82,6 +85,8 @@ EXPORT_SYMBOL_GPL(snd_hdac_stream_clear);
  */
 void snd_hdac_stream_stop(struct hdac_stream *azx_dev)
 {
+	trace_snd_hdac_stream_stop(azx_dev->bus, azx_dev);
+
 	snd_hdac_stream_clear(azx_dev);
 	/* disable SIE */
 	snd_hdac_chip_updatel(azx_dev->bus, INTCTL, 1 << azx_dev->index, 0);

sound/hda/trace.h

@@ -50,6 +50,33 @@ TRACE_EVENT(hda_unsol_event,
 	),
 	TP_printk("%s", __get_str(msg))
 );
+
+DECLARE_EVENT_CLASS(hdac_stream,
+	TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev),
+
+	TP_ARGS(bus, azx_dev),
+
+	TP_STRUCT__entry(
+		__field(unsigned char, stream_tag)
+	),
+
+	TP_fast_assign(
+		__entry->stream_tag = (azx_dev)->stream_tag;
+	),
+
+	TP_printk("stream_tag: %d", __entry->stream_tag)
+);
+
+DEFINE_EVENT(hdac_stream, snd_hdac_stream_start,
+	TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev),
+	TP_ARGS(bus, azx_dev)
+);
+
+DEFINE_EVENT(hdac_stream, snd_hdac_stream_stop,
+	TP_PROTO(struct hdac_bus *bus, struct hdac_stream *azx_dev),
+	TP_ARGS(bus, azx_dev)
+);
+
 #endif /* __HDAC_TRACE_H */
 
 /* This part must be outside protection */