From 4ebd8283403daf5507e5aafb42fe3e4c7612eb14 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Wed, 22 Mar 2023 09:51:51 +0100
Subject: [PATCH] drm/vc4: hvs: More logging for dlist generation

DLIST generation can get pretty tricky and there's not a lot of debug in
the driver to help. Let's add a few more to track the generated DLIST
size.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -826,11 +826,22 @@ int vc4_hvs_atomic_check(struct drm_crtc
 	if (hweight32(crtc_state->connector_mask) > 1)
 		return -EINVAL;
 
-	drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state)
-		dlist_count += vc4_plane_dlist_size(plane_state);
+	drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) {
+		u32 plane_dlist_count = vc4_plane_dlist_size(plane_state);
+
+		drm_dbg_driver(dev, "[CRTC:%d:%s] Found [PLANE:%d:%s] with DLIST size: %u\n",
+			       crtc->base.id, crtc->name,
+			       plane->base.id, plane->name,
+			       plane_dlist_count);
+
+		dlist_count += plane_dlist_count;
+	}
 
 	dlist_count++; /* Account for SCALER_CTL0_END. */
 
+	drm_dbg_driver(dev, "[CRTC:%d:%s] Allocating DLIST block with size: %u\n",
+		       crtc->base.id, crtc->name, dlist_count);
+
 	alloc = vc4_hvs_alloc_dlist_entry(vc4->hvs, vc4_state->assigned_channel, dlist_count);
 	if (IS_ERR(alloc))
 		return PTR_ERR(alloc);
