[PATCH 16/18] drm/i915: Add VLV/CHV watermark/FIFO programming tracepoints

[ville.syrjala@linux.intel.com]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Add tracepoints for observing the WM/FIFO programming on VLV/CHV. When
compared with the plane and pipe update tracepoints this can be used
to verify that everything is performed in the right sequence.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_trace.h | 71 +++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_pm.c   |  4 +++
 2 files changed, 75 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 6354b71fc6a7..865084fd8455 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -14,6 +14,77 @@
 #define TRACE_SYSTEM i915
 #define TRACE_INCLUDE_FILE i915_trace
 
+/* watermark/fifo updates */
+
+TRACE_EVENT(vlv_wm,
+	    TP_PROTO(struct intel_crtc *crtc, const struct vlv_wm_values *wm),
+	    TP_ARGS(crtc, wm),
+
+	    TP_STRUCT__entry(
+			     __field(enum pipe, pipe)
+			     __field(u32, frame)
+			     __field(u32, scanline)
+			     __field(u32, level)
+			     __field(u32, cxsr)
+			     __field(u32, primary)
+			     __field(u32, sprite0)
+			     __field(u32, sprite1)
+			     __field(u32, cursor)
+			     __field(u32, sr_plane)
+			     __field(u32, sr_cursor)
+			     ),
+
+	    TP_fast_assign(
+			   __entry->pipe = crtc->pipe;
+			   __entry->frame = crtc->base.dev->driver->get_vblank_counter(crtc->base.dev,
+										       crtc->pipe);
+			   __entry->scanline = intel_get_crtc_scanline(crtc);
+			   __entry->level = wm->level;
+			   __entry->cxsr = wm->cxsr;
+			   __entry->primary = wm->pipe[crtc->pipe].plane[PLANE_PRIMARY];
+			   __entry->sprite0 = wm->pipe[crtc->pipe].plane[PLANE_SPRITE0];
+			   __entry->sprite1 = wm->pipe[crtc->pipe].plane[PLANE_SPRITE1];
+			   __entry->cursor = wm->pipe[crtc->pipe].plane[PLANE_CURSOR];
+			   __entry->sr_plane = wm->sr.plane;
+			   __entry->sr_cursor = wm->sr.cursor;
+			   ),
+
+	    TP_printk("pipe %c, frame=%u, scanline=%u, level=%d, cxsr=%d, wm %d/%d/%d/%d, sr %d/%d",
+		      pipe_name(__entry->pipe), __entry->frame,
+		      __entry->scanline, __entry->level, __entry->cxsr,
+		      __entry->primary, __entry->sprite0, __entry->sprite1, __entry->cursor,
+		      __entry->sr_plane, __entry->sr_cursor)
+);
+
+TRACE_EVENT(vlv_fifo_size,
+	    TP_PROTO(struct intel_crtc *crtc, u32 sprite0_start, u32 sprite1_start, u32 fifo_size),
+	    TP_ARGS(crtc, sprite0_start, sprite1_start, fifo_size),
+
+	    TP_STRUCT__entry(
+			     __field(enum pipe, pipe)
+			     __field(u32, frame)
+			     __field(u32, scanline)
+			     __field(u32, sprite0_start)
+			     __field(u32, sprite1_start)
+			     __field(u32, fifo_size)
+			     ),
+
+	    TP_fast_assign(
+			   __entry->pipe = crtc->pipe;
+			   __entry->frame = crtc->base.dev->driver->get_vblank_counter(crtc->base.dev,
+										       crtc->pipe);
+			   __entry->scanline = intel_get_crtc_scanline(crtc);
+			   __entry->sprite0_start = sprite0_start;
+			   __entry->sprite1_start = sprite1_start;
+			   __entry->fifo_size = fifo_size;
+			   ),
+
+	    TP_printk("pipe %c, frame=%u, scanline=%u, %d/%d/%d",
+		      pipe_name(__entry->pipe), __entry->frame,
+		      __entry->scanline, __entry->sprite0_start,
+		      __entry->sprite1_start, __entry->fifo_size)
+);
+
 /* plane updates */
 
 TRACE_EVENT(intel_update_plane,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index fbd9cfba720a..69b52da19f6d 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -878,6 +878,8 @@ static void vlv_write_wm_values(struct drm_i915_private *dev_priv,
 	enum pipe pipe;
 
 	for_each_pipe(dev_priv, pipe) {
+		trace_vlv_wm(intel_get_crtc_for_pipe(dev_priv, pipe), wm);
+
 		I915_WRITE(VLV_DDL(pipe),
 			   (wm->ddl[pipe].plane[PLANE_CURSOR] << DDL_CURSOR_SHIFT) |
 			   (wm->ddl[pipe].plane[PLANE_SPRITE1] << DDL_SPRITE_SHIFT(1)) |
@@ -1342,6 +1344,8 @@ static void vlv_atomic_update_fifo(struct intel_atomic_state *state,
 	WARN_ON(fifo_state->plane[PLANE_CURSOR] != 63);
 	WARN_ON(fifo_size != 511);
 
+	trace_vlv_fifo_size(crtc, sprite0_start, sprite1_start, fifo_size);
+
 	spin_lock(&dev_priv->wm.dsparb_lock);
 
 	switch (crtc->pipe) {
-- 
2.10.2

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