From: Thierry Reding <treding@nvidia.com>
Date: Tue, 15 Aug 2017 15:41:10 +0200
Subject: drm/tegra: dc: Trace register accesses
Git-commit: 67e04d1ab19b0cc6d87ca7c44b058edf678bc3a3
Patch-mainline: v4.14-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Add tracepoint events for display controller register accesses.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/tegra/Makefile | 2 ++
drivers/gpu/drm/tegra/drm.h | 8 +++++++-
drivers/gpu/drm/tegra/trace.c | 2 ++
drivers/gpu/drm/tegra/trace.h | 40 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 51 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/tegra/Makefile
+++ b/drivers/gpu/drm/tegra/Makefile
@@ -17,4 +17,6 @@ tegra-drm-y := \
falcon.o \
vic.o
+tegra-drm-y += trace.o
+
obj-$(CONFIG_DRM_TEGRA) += tegra-drm.o
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -23,6 +23,7 @@
#include <drm/drm_fixed.h>
#include "gem.h"
+#include "trace.h"
struct reset_control;
@@ -174,12 +175,17 @@ static inline struct tegra_dc *to_tegra_
static inline void tegra_dc_writel(struct tegra_dc *dc, u32 value,
unsigned int offset)
{
+ trace_dc_writel(dc->dev, offset, value);
writel(value, dc->regs + (offset << 2));
}
static inline u32 tegra_dc_readl(struct tegra_dc *dc, unsigned int offset)
{
- return readl(dc->regs + (offset << 2));
+ u32 value = readl(dc->regs + (offset << 2));
+
+ trace_dc_readl(dc->dev, offset, value);
+
+ return value;
}
struct tegra_dc_window {
--- /dev/null
+++ b/drivers/gpu/drm/tegra/trace.c
@@ -0,0 +1,2 @@
+#define CREATE_TRACE_POINTS
+#include "trace.h"
--- /dev/null
+++ b/drivers/gpu/drm/tegra/trace.h
@@ -0,0 +1,40 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM tegra
+
+#if !defined(DRM_TEGRA_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define DRM_TEGRA_TRACE_H 1
+
+#include <linux/device.h>
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(register_access,
+ TP_PROTO(struct device *dev, unsigned int offset, u32 value),
+ TP_ARGS(dev, offset, value),
+ TP_STRUCT__entry(
+ __field(struct device *, dev)
+ __field(unsigned int, offset)
+ __field(u32, value)
+ ),
+ TP_fast_assign(
+ __entry->dev = dev;
+ __entry->offset = offset;
+ __entry->value = value;
+ ),
+ TP_printk("%s %04x %08x", dev_name(__entry->dev), __entry->offset,
+ __entry->value)
+);
+
+DEFINE_EVENT(register_access, dc_writel,
+ TP_PROTO(struct device *dev, unsigned int offset, u32 value),
+ TP_ARGS(dev, offset, value));
+DEFINE_EVENT(register_access, dc_readl,
+ TP_PROTO(struct device *dev, unsigned int offset, u32 value),
+ TP_ARGS(dev, offset, value));
+
+#endif /* DRM_TEGRA_TRACE_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+#define TRACE_INCLUDE_FILE trace
+#include <trace/define_trace.h>