ALSA: hda - Add basic tracepoints

Add a few tracepoints to HD-audio driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/Makefile

@@ -6,6 +6,9 @@ snd-hda-codec-$(CONFIG_PROC_FS) += hda_proc.o
 snd-hda-codec-$(CONFIG_SND_HDA_HWDEP) += hda_hwdep.o
 snd-hda-codec-$(CONFIG_SND_HDA_INPUT_BEEP) += hda_beep.o
 
+# for trace-points
+CFLAGS_hda_codec.o := -I$(src)
+
 snd-hda-codec-realtek-objs :=	patch_realtek.o
 snd-hda-codec-cmedia-objs :=	patch_cmedia.o
 snd-hda-codec-analog-objs :=	patch_analog.o

sound/pci/hda/hda_codec.c

@@ -34,6 +34,9 @@
 #include "hda_beep.h"
 #include <sound/hda_hwdep.h>
 
+#define CREATE_TRACE_POINTS
+#include "hda_trace.h"
+
 /*
  * vendor / preset table
  */
@@ -208,15 +211,19 @@ static int codec_exec_verb(struct hda_codec *codec, unsigned int cmd,
  again:
 	snd_hda_power_up(codec);
 	mutex_lock(&bus->cmd_mutex);
+	trace_hda_send_cmd(codec, cmd);
 	err = bus->ops.command(bus, cmd);
-	if (!err && res)
+	if (!err && res) {
 		*res = bus->ops.get_response(bus, codec->addr);
+		trace_hda_get_response(codec, *res);
+	}
 	mutex_unlock(&bus->cmd_mutex);
 	snd_hda_power_down(codec);
 	if (res && *res == -1 && bus->rirb_error) {
 		if (bus->response_reset) {
 			snd_printd("hda_codec: resetting BUS due to "
 				   "fatal communication error\n");
+			trace_hda_bus_reset(bus);
 			bus->ops.bus_reset(bus);
 		}
 		goto again;
@@ -4083,6 +4090,7 @@ static void hda_power_work(struct work_struct *work)
 		return;
 	}
 
+	trace_hda_power_down(codec);
 	hda_call_codec_suspend(codec);
 	if (bus->ops.pm_notify)
 		bus->ops.pm_notify(bus);
@@ -4121,6 +4129,7 @@ void snd_hda_power_up(struct hda_codec *codec)
 	if (codec->power_on || codec->power_transition)
 		return;
 
+	trace_hda_power_up(codec);
 	snd_hda_update_power_acct(codec);
 	codec->power_on = 1;
 	codec->power_jiffies = jiffies;

sound/pci/hda/hda_trace.h

+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM hda
+#define TRACE_INCLUDE_FILE hda_trace
+
+#if !defined(_TRACE_HDA_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HDA_H
+
+#include <linux/tracepoint.h>
+
+struct hda_bus;
+struct hda_codec;
+
+DECLARE_EVENT_CLASS(hda_cmd,
+
+	TP_PROTO(struct hda_codec *codec, unsigned int val),
+
+	TP_ARGS(codec, val),
+
+	TP_STRUCT__entry(
+		__field( unsigned int, card )
+		__field( unsigned int, addr )
+		__field( unsigned int, val )
+	),
+
+	TP_fast_assign(
+		__entry->card = (codec)->bus->card->number;
+		__entry->addr = (codec)->addr;
+		__entry->val = (val);
+	),
+
+	TP_printk("[%d:%d] val=%x", __entry->card, __entry->addr, __entry->val)
+);
+
+DEFINE_EVENT(hda_cmd, hda_send_cmd,
+	TP_PROTO(struct hda_codec *codec, unsigned int val),
+	TP_ARGS(codec, val)
+);
+
+DEFINE_EVENT(hda_cmd, hda_get_response,
+	TP_PROTO(struct hda_codec *codec, unsigned int val),
+	TP_ARGS(codec, val)
+);
+
+TRACE_EVENT(hda_bus_reset,
+
+	TP_PROTO(struct hda_bus *bus),
+
+	TP_ARGS(bus),
+
+	TP_STRUCT__entry(
+		__field( unsigned int, card )
+	),
+
+	TP_fast_assign(
+		__entry->card = (bus)->card->number;
+	),
+
+	TP_printk("[%d]", __entry->card)
+);
+
+DECLARE_EVENT_CLASS(hda_power,
+
+	TP_PROTO(struct hda_codec *codec),
+
+	TP_ARGS(codec),
+
+	TP_STRUCT__entry(
+		__field( unsigned int, card )
+		__field( unsigned int, addr )
+	),
+
+	TP_fast_assign(
+		__entry->card = (codec)->bus->card->number;
+		__entry->addr = (codec)->addr;
+	),
+
+	TP_printk("[%d:%d]", __entry->card, __entry->addr)
+);
+
+DEFINE_EVENT(hda_power, hda_power_down,
+	TP_PROTO(struct hda_codec *codec),
+	TP_ARGS(codec)
+);
+
+DEFINE_EVENT(hda_power, hda_power_up,
+	TP_PROTO(struct hda_codec *codec),
+	TP_ARGS(codec)
+);
+
+#endif /* _TRACE_HDA_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#include <trace/define_trace.h>