From c1944c73f33060425ad23035f551eaea3d710249 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <mripard@kernel.org>
Date: Fri, 21 Jun 2024 16:20:33 +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 <mripard@kernel.org>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240621152055.4180873-10-dave.stevenson@raspberrypi.com
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/gpu/drm/vc4/vc4_hvs.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_hvs.c
+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
@@ -460,11 +460,21 @@ 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);
 	spin_lock_irqsave(&vc4->hvs->mm_lock, flags);
 	ret = drm_mm_insert_node(&vc4->hvs->dlist_mm, &vc4_state->mm,
 				 dlist_count);
