drm/tegra: hdmi: Trace register accesses

Add tracepoint events for HDMI controller register accesses.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/tegra/hdmi.c

@@ -24,6 +24,7 @@
 #include "hdmi.h"
 #include "drm.h"
 #include "dc.h"
+#include "trace.h"
 
 #define HDMI_ELD_BUFFER_SIZE 96
 
@@ -102,12 +103,17 @@ enum {
 static inline u32 tegra_hdmi_readl(struct tegra_hdmi *hdmi,
 				   unsigned int offset)
 {
-	return readl(hdmi->regs + (offset << 2));
+	u32 value = readl(hdmi->regs + (offset << 2));
+
+	trace_hdmi_readl(hdmi->dev, offset, value);
+
+	return value;
 }
 
 static inline void tegra_hdmi_writel(struct tegra_hdmi *hdmi, u32 value,
 				     unsigned int offset)
 {
+	trace_hdmi_writel(hdmi->dev, offset, value);
 	writel(value, hdmi->regs + (offset << 2));
 }
 

drivers/gpu/drm/tegra/trace.h

@@ -31,6 +31,13 @@ DEFINE_EVENT(register_access, dc_readl,
 	TP_PROTO(struct device *dev, unsigned int offset, u32 value),
 	TP_ARGS(dev, offset, value));
 
+DEFINE_EVENT(register_access, hdmi_writel,
+	TP_PROTO(struct device *dev, unsigned int offset, u32 value),
+	TP_ARGS(dev, offset, value));
+DEFINE_EVENT(register_access, hdmi_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 */