drm/tegra: dsi: Trace register accesses

Add tracepoint events for DSI controller register accesses.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index 444664b..6050cc4 100644 (file)
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -28,6 +28,7 @@
 #include "drm.h"
 #include "dsi.h"
 #include "mipi-phy.h"
+#include "trace.h"
 
 struct tegra_dsi_state {
        struct drm_connector_state base;
@@ -107,12 +108,17 @@ static struct tegra_dsi_state *tegra_dsi_get_state(struct tegra_dsi *dsi)
 
 static inline u32 tegra_dsi_readl(struct tegra_dsi *dsi, unsigned int offset)
 {
-       return readl(dsi->regs + (offset << 2));
+       u32 value = readl(dsi->regs + (offset << 2));
+
+       trace_dsi_readl(dsi->dev, offset, value);
+
+       return value;
 }
 
 static inline void tegra_dsi_writel(struct tegra_dsi *dsi, u32 value,
                                    unsigned int offset)
 {
+       trace_dsi_writel(dsi->dev, offset, value);
        writel(value, dsi->regs + (offset << 2));
 }
 

diff --git a/drivers/gpu/drm/tegra/trace.h b/drivers/gpu/drm/tegra/trace.h
index e5c2e43..dd0176f 100644 (file)
--- a/drivers/gpu/drm/tegra/trace.h
+++ b/drivers/gpu/drm/tegra/trace.h
@@ -38,6 +38,13 @@ DEFINE_EVENT(register_access, hdmi_readl,
        TP_PROTO(struct device *dev, unsigned int offset, u32 value),
        TP_ARGS(dev, offset, value));
 
+DEFINE_EVENT(register_access, dsi_writel,
+       TP_PROTO(struct device *dev, unsigned int offset, u32 value),
+       TP_ARGS(dev, offset, value));
+DEFINE_EVENT(register_access, dsi_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 */