From 226ee6e172789aa553c2acc69a50d5e242f4cd89 Mon Sep 17 00:00:00 2001
From: Amir Vajid <avajid@codeaurora.org>
Date: Thu, 9 Apr 2020 12:58:41 -0700
Subject: [PATCH] PM / devfreq: bw_hwmon: add bw_hwmon_debug event

Add bw_hwmon_debug ftrace event to improve debugging.

Change-Id: Ib10f764b330492fd21ff50931cc6ded6c2ca1ef2
Signed-off-by: Amir Vajid <avajid@codeaurora.org>
---
 drivers/devfreq/governor_bw_hwmon.c |  8 ++++++
 include/trace/events/power.h        | 38 +++++++++++++++++++++++++++++
 kernel/trace/power-traces.c         |  1 +
 3 files changed, 47 insertions(+)

diff --git a/drivers/devfreq/governor_bw_hwmon.c b/drivers/devfreq/governor_bw_hwmon.c
index e2c5ed06ce76..665de8557804 100644
--- a/drivers/devfreq/governor_bw_hwmon.c
+++ b/drivers/devfreq/governor_bw_hwmon.c
@@ -462,6 +462,14 @@ static unsigned long get_bw_and_set_irq(struct hwmon_node *node,
 				*freq,
 				hw->up_wake_mbps,
 				hw->down_wake_mbps);
+
+	trace_bw_hwmon_debug(dev_name(node->hw->df->dev.parent),
+				req_mbps,
+				meas_mbps_zone,
+				node->hist_max_mbps,
+				node->hist_mem,
+				node->hyst_mbps,
+				node->hyst_en);
 	return req_mbps;
 }
 
diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 6d47fdee7993..0b48a7474441 100644
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -585,6 +585,44 @@ TRACE_EVENT(bw_hwmon_update,
 		__entry->down_thres)
 );
 
+TRACE_EVENT(bw_hwmon_debug,
+
+	TP_PROTO(const char *name, unsigned long mbps, unsigned long zone,
+		 unsigned long hist_max, unsigned long hist_mem,
+		 unsigned long hyst_mbps, unsigned long hyst_len),
+
+	TP_ARGS(name, mbps, zone, hist_max, hist_mem, hyst_mbps, hyst_len),
+
+	TP_STRUCT__entry(
+		__string(name,			name)
+		__field(unsigned long,		mbps)
+		__field(unsigned long,		zone)
+		__field(unsigned long,		hist_max)
+		__field(unsigned long,		hist_mem)
+		__field(unsigned long,		hyst_mbps)
+		__field(unsigned long,		hyst_len)
+	),
+
+	TP_fast_assign(
+		__assign_str(name, name);
+		__entry->mbps = mbps;
+		__entry->zone = zone;
+		__entry->hist_max = hist_max;
+		__entry->hist_mem = hist_mem;
+		__entry->hyst_mbps = hyst_mbps;
+		__entry->hyst_len = hyst_len;
+	),
+
+	TP_printk("dev=%s mbps=%lu zone=%lu hist_max=%lu hist_mem=%lu hyst_mbps=%lu hyst_len=%lu",
+		__get_str(name),
+		__entry->mbps,
+		__entry->zone,
+		__entry->hist_max,
+		__entry->hist_mem,
+		__entry->hyst_mbps,
+		__entry->hyst_len)
+);
+
 TRACE_EVENT(cache_hwmon_meas,
 	TP_PROTO(const char *name, unsigned long high_mrps,
 		 unsigned long med_mrps, unsigned long low_mrps,
diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c
index 95d81de6589e..1f57dc8fee89 100644
--- a/kernel/trace/power-traces.c
+++ b/kernel/trace/power-traces.c
@@ -25,3 +25,4 @@ EXPORT_TRACEPOINT_SYMBOL(cache_hwmon_update);
 EXPORT_TRACEPOINT_SYMBOL(cache_hwmon_meas);
 EXPORT_TRACEPOINT_SYMBOL(bw_hwmon_update);
 EXPORT_TRACEPOINT_SYMBOL(bw_hwmon_meas);
+EXPORT_TRACEPOINT_SYMBOL(bw_hwmon_debug);