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drm/tegra: dc: Trace register accesses

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Add tracepoint events for display controller register accesses.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2017-08-15 15:41:10 +02:00
parent 5c5f13016d
commit 67e04d1ab1
4 changed files with 51 additions and 1 deletions
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2
drivers/gpu/drm/tegra/Makefile
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@ -17,4 +17,6 @@ tegra-drm-y := \
falcon.o \ falcon.o \
vic.o vic.o
tegra-drm-y += trace.o
obj-$(CONFIG_DRM_TEGRA) += tegra-drm.o obj-$(CONFIG_DRM_TEGRA) += tegra-drm.o

8
drivers/gpu/drm/tegra/drm.h
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@ -23,6 +23,7 @@
#include <drm/drm_fixed.h> #include <drm/drm_fixed.h>
#include "gem.h" #include "gem.h"
#include "trace.h"
struct reset_control; struct reset_control;
@ -174,12 +175,17 @@ static inline struct tegra_dc *to_tegra_dc(struct drm_crtc *crtc)
static inline void tegra_dc_writel(struct tegra_dc *dc, u32 value, static inline void tegra_dc_writel(struct tegra_dc *dc, u32 value,
unsigned int offset) unsigned int offset)
{ {
trace_dc_writel(dc->dev, offset, value);
writel(value, dc->regs + (offset << 2)); writel(value, dc->regs + (offset << 2));
} }
static inline u32 tegra_dc_readl(struct tegra_dc *dc, unsigned int offset) 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 { struct tegra_dc_window {

2
drivers/gpu/drm/tegra/trace.c Normal file
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@ -0,0 +1,2 @@
#define CREATE_TRACE_POINTS
#include "trace.h"

40
drivers/gpu/drm/tegra/trace.h Normal file
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@ -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>