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From 164f7e94da446984f275be1c082b93243beadfba Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Wed, 22 Mar 2023 16:17:57 +0100
Subject: [PATCH] drm/vc4: plane: Add more debugging for LBM allocation
LBM allocations need a different size depending on the line length,
format, etc.
This can get tricky, and fail. Let's add some more prints to ease the
debugging when it does.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/vc4/vc4_plane.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -735,6 +735,7 @@ static int vc4_plane_allocate_lbm(struct
{
struct drm_device *drm = state->plane->dev;
struct vc4_dev *vc4 = to_vc4_dev(drm);
+ struct drm_plane *plane = state->plane;
struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
unsigned long irqflags;
u32 lbm_size;
@@ -743,6 +744,9 @@ static int vc4_plane_allocate_lbm(struct
if (!lbm_size)
return 0;
+ drm_dbg_driver(drm, "[PLANE:%d:%s] LBM Allocation Size: %u\n",
+ plane->base.id, plane->name, lbm_size);
+
if (WARN_ON(!vc4_state->lbm_offset))
return -EINVAL;
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