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ASoC: SOF: add widget setup/free tracing

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Enables tracking of use_count during widget setup and free routines.
Useful for debugging unbalanced use_counts during suspend/resume.

Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Signed-off-by: Noah Klayman <noah.klayman@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220919122108.43764-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Bard Liao 2022-09-19 14:21:02 +02:00 committed by Mark Brown
parent 12e51866c7
commit fa6e73d691
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
3 changed files with 52 additions and 0 deletions
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44
include/trace/events/sof.h Normal file
View file

@ -0,0 +1,44 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright(c) 2022 Intel Corporation. All rights reserved.
*
* Author: Noah Klayman <noah.klayman@intel.com>
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM sof
#if !defined(_TRACE_SOF_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_SOF_H
#include <linux/tracepoint.h>
#include <sound/sof/stream.h>
#include "../../../sound/soc/sof/sof-audio.h"
DECLARE_EVENT_CLASS(sof_widget_template,
TP_PROTO(struct snd_sof_widget *swidget),
TP_ARGS(swidget),
TP_STRUCT__entry(
__string(name, swidget->widget->name)
__field(int, use_count)
),
TP_fast_assign(
__assign_str(name, swidget->widget->name);
__entry->use_count = swidget->use_count;
),
TP_printk("name=%s use_count=%d", __get_str(name), __entry->use_count)
);
DEFINE_EVENT(sof_widget_template, sof_widget_setup,
TP_PROTO(struct snd_sof_widget *swidget),
TP_ARGS(swidget)
);
DEFINE_EVENT(sof_widget_template, sof_widget_free,
TP_PROTO(struct snd_sof_widget *swidget),
TP_ARGS(swidget)
);
#endif /* _TRACE_SOF_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

3
sound/soc/sof/core.c
View file

@ -15,6 +15,9 @@
#include "sof-priv.h"
#include "ops.h"
#define CREATE_TRACE_POINTS
#include <trace/events/sof.h>
/* see SOF_DBG_ flags */
static int sof_core_debug = IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_ENABLE_FIRMWARE_TRACE);
module_param_named(sof_debug, sof_core_debug, int, 0444);

5
sound/soc/sof/sof-audio.c
View file

@ -9,6 +9,7 @@
//
#include <linux/bitfield.h>
#include <trace/events/sof.h>
#include "sof-audio.h"
#include "sof-of-dev.h"
#include "ops.h"
@ -36,6 +37,8 @@ int sof_widget_free(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
if (!swidget->private)
return 0;
trace_sof_widget_free(swidget);
/* only free when use_count is 0 */
if (--swidget->use_count)
return 0;
@ -86,6 +89,8 @@ int sof_widget_setup(struct snd_sof_dev *sdev, struct snd_sof_widget *swidget)
if (!swidget->private)
return 0;
trace_sof_widget_setup(swidget);
/* widget already set up */
if (++swidget->use_count > 1)
return 0;