ALSA: hda - Add tracepoint for unsolicited events

Signed-off-by: Takashi Iwai <tiwai@suse.de>

Documentation/sound/alsa/HD-Audio.txt

@@ -529,7 +529,8 @@ Tracepoints
 The hd-audio driver gives a few basic tracepoints.
 `hda:hda_send_cmd` traces each CORB write while `hda:hda_get_response`
 traces the response from RIRB (only when read from the codec driver).
-`hda:hda_bus_reset` traces the bus-reset due to fatal error, etc, and
+`hda:hda_bus_reset` traces the bus-reset due to fatal error, etc,
+`hda:hda_unsol_event` traces the unsolicited events, and
 `hda:hda_power_down` and `hda:hda_power_up` trace the power down/up
 via power-saving behavior.
 

sound/pci/hda/hda_codec.c

@@ -610,6 +610,7 @@ int snd_hda_queue_unsol_event(struct hda_bus *bus, u32 res, u32 res_ex)
 	struct hda_bus_unsolicited *unsol;
 	unsigned int wp;
 
+	trace_hda_unsol_event(bus, res, res_ex);
 	unsol = bus->unsol;
 	if (!unsol)
 		return 0;

sound/pci/hda/hda_trace.h

@@ -87,6 +87,28 @@ DEFINE_EVENT(hda_power, hda_power_up,
 	TP_ARGS(codec)
 );
 
+TRACE_EVENT(hda_unsol_event,
+
+	TP_PROTO(struct hda_bus *bus, u32 res, u32 res_ex),
+
+	TP_ARGS(bus, res, res_ex),
+
+	TP_STRUCT__entry(
+		__field( unsigned int, card )
+		__field( u32, res )
+		__field( u32, res_ex )
+	),
+
+	TP_fast_assign(
+		__entry->card = (bus)->card->number;
+		__entry->res = res;
+		__entry->res_ex = res_ex;
+	),
+
+	TP_printk("[%d] res=%x, res_ex=%x", __entry->card,
+		  __entry->res, __entry->res_ex)
+);
+
 #endif /* _TRACE_HDA_H */
 
 /* This part must be outside protection */