[PATCH 09/10] drm/i915/gen9: Actually verify WM levels in verify_wm_state()

[Lyude]

Thanks to Paulo Zanoni for indirectly pointing this out.

Looks like we never actually added any code for checking whether or not
we actually wrote watermark levels properly. Let's fix that.

Signed-off-by: Lyude <cpaul at redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 100 +++++++++++++++++++++++++++++------
 1 file changed, 84 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 39400a0..2c682bc 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13444,30 +13444,66 @@ static void verify_wm_state(struct drm_crtc *crtc,
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct skl_ddb_allocation hw_ddb, *sw_ddb;
-	struct skl_ddb_entry *hw_entry, *sw_entry;
+	struct skl_pipe_wm hw_wm, *sw_wm;
+	struct skl_plane_wm *hw_plane_wm, *sw_plane_wm;
+	struct skl_ddb_entry *hw_ddb_entry, *sw_ddb_entry;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	const enum pipe pipe = intel_crtc->pipe;
-	int plane;
+	int plane, level, max_level = ilk_wm_max_level(dev);
 
 	if (INTEL_INFO(dev)->gen < 9 || !new_state->active)
 		return;
 
+	skl_pipe_wm_get_hw_state(crtc, &hw_wm);
+	sw_wm = &intel_crtc->wm.active.skl;
+
 	skl_ddb_get_hw_state(dev_priv, &hw_ddb);
 	sw_ddb = &dev_priv->wm.skl_hw.ddb;
 
 	/* planes */
 	for_each_plane(dev_priv, pipe, plane) {
-		hw_entry = &hw_ddb.plane[pipe][plane];
-		sw_entry = &sw_ddb->plane[pipe][plane];
+		hw_plane_wm = &hw_wm.planes[plane];
+		sw_plane_wm = &sw_wm->planes[plane];
 
-		if (skl_ddb_entry_equal(hw_entry, sw_entry))
-			continue;
+		/* Watermarks */
+		for (level = 0; level <= max_level; level++) {
+			if (skl_wm_level_equals(&hw_plane_wm->wm[level],
+						&sw_plane_wm->wm[level]))
+				continue;
+
+			DRM_ERROR("mismatch in WM pipe %c plane %d level %d (expected e=%d b=%d l=%d, got e=%d b=%d l=%d)\n",
+				  pipe_name(pipe), plane + 1, level,
+				  sw_plane_wm->wm[level].plane_en,
+				  sw_plane_wm->wm[level].plane_res_b,
+				  sw_plane_wm->wm[level].plane_res_l,
+				  hw_plane_wm->wm[level].plane_en,
+				  hw_plane_wm->wm[level].plane_res_b,
+				  hw_plane_wm->wm[level].plane_res_l);
+		}
 
-		DRM_ERROR("mismatch in DDB state pipe %c plane %d "
-			  "(expected (%u,%u), found (%u,%u))\n",
-			  pipe_name(pipe), plane + 1,
-			  sw_entry->start, sw_entry->end,
-			  hw_entry->start, hw_entry->end);
+		if (!skl_wm_level_equals(&hw_plane_wm->trans_wm,
+					 &sw_plane_wm->trans_wm)) {
+			DRM_ERROR("mismatch in trans WM pipe %c plane %d (expected e=%d b=%d l=%d, got e=%d b=%d l=%d)\n",
+				  pipe_name(pipe), plane + 1,
+				  sw_plane_wm->trans_wm.plane_en,
+				  sw_plane_wm->trans_wm.plane_res_b,
+				  sw_plane_wm->trans_wm.plane_res_l,
+				  hw_plane_wm->trans_wm.plane_en,
+				  hw_plane_wm->trans_wm.plane_res_b,
+				  hw_plane_wm->trans_wm.plane_res_l);
+		}
+
+		/* DDB */
+		hw_ddb_entry = &hw_ddb.plane[pipe][plane];
+		sw_ddb_entry = &sw_ddb->plane[pipe][plane];
+
+		if (!skl_ddb_entry_equal(hw_ddb_entry, sw_ddb_entry)) {
+			DRM_ERROR("mismatch in DDB state pipe %c plane %d "
+				  "(expected (%u,%u), found (%u,%u))\n",
+				  pipe_name(pipe), plane + 1,
+				  sw_ddb_entry->start, sw_ddb_entry->end,
+				  hw_ddb_entry->start, hw_ddb_entry->end);
+		}
 	}
 
 	/*
@@ -13477,15 +13513,47 @@ static void verify_wm_state(struct drm_crtc *crtc,
 	 * once the plane becomes visible, we can skip this check
 	 */
 	if (intel_crtc->cursor_addr) {
-		hw_entry = &hw_ddb.plane[pipe][PLANE_CURSOR];
-		sw_entry = &sw_ddb->plane[pipe][PLANE_CURSOR];
+		hw_plane_wm = &hw_wm.planes[PLANE_CURSOR];
+		sw_plane_wm = &sw_wm->planes[PLANE_CURSOR];
+
+		/* Watermarks */
+		for (level = 0; level <= max_level; level++) {
+			if (skl_wm_level_equals(&hw_plane_wm->wm[level],
+						&sw_plane_wm->wm[level]))
+				continue;
+
+			DRM_ERROR("mismatch in WM pipe %c cursor level %d (expected e=%d b=%d l=%d, got e=%d b=%d l=%d)\n",
+				  pipe_name(pipe), level,
+				  sw_plane_wm->wm[level].plane_en,
+				  sw_plane_wm->wm[level].plane_res_b,
+				  sw_plane_wm->wm[level].plane_res_l,
+				  hw_plane_wm->wm[level].plane_en,
+				  hw_plane_wm->wm[level].plane_res_b,
+				  hw_plane_wm->wm[level].plane_res_l);
+		}
+
+		if (!skl_wm_level_equals(&hw_plane_wm->trans_wm,
+					 &sw_plane_wm->trans_wm)) {
+			DRM_ERROR("mismatch in trans WM pipe %c cursor (expected e=%d b=%d l=%d, got e=%d b=%d l=%d)\n",
+				  pipe_name(pipe),
+				  sw_plane_wm->trans_wm.plane_en,
+				  sw_plane_wm->trans_wm.plane_res_b,
+				  sw_plane_wm->trans_wm.plane_res_l,
+				  hw_plane_wm->trans_wm.plane_en,
+				  hw_plane_wm->trans_wm.plane_res_b,
+				  hw_plane_wm->trans_wm.plane_res_l);
+		}
+
+		/* DDB */
+		hw_ddb_entry = &hw_ddb.plane[pipe][PLANE_CURSOR];
+		sw_ddb_entry = &sw_ddb->plane[pipe][PLANE_CURSOR];
 
-		if (!skl_ddb_entry_equal(hw_entry, sw_entry)) {
+		if (!skl_ddb_entry_equal(hw_ddb_entry, sw_ddb_entry)) {
 			DRM_ERROR("mismatch in DDB state pipe %c cursor "
 				  "(expected (%u,%u), found (%u,%u))\n",
 				  pipe_name(pipe),
-				  sw_entry->start, sw_entry->end,
-				  hw_entry->start, hw_entry->end);
+				  sw_ddb_entry->start, sw_ddb_entry->end,
+				  hw_ddb_entry->start, hw_ddb_entry->end);
 		}
 	}
 }
-- 
2.7.4