target/linux/bcm27xx/patches-6.1/950-0935-drm-vc4-plane-Add-more-debugging-for-LBM-allocation.patch

   1 From 164f7e94da446984f275be1c082b93243beadfba Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Wed, 22 Mar 2023 16:17:57 +0100
   4 Subject: [PATCH] drm/vc4: plane: Add more debugging for LBM allocation
   5
   6 LBM allocations need a different size depending on the line length,
   7 format, etc.
   8
   9 This can get tricky, and fail. Let's add some more prints to ease the
  10 debugging when it does.
  11
  12 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  13 ---
  14  drivers/gpu/drm/vc4/vc4_plane.c | 4 ++++
  15  1 file changed, 4 insertions(+)
  16
  17 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  18 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  19 @@ -735,6 +735,7 @@ static int vc4_plane_allocate_lbm(struct
  20  {
  21         struct drm_device *drm = state->plane->dev;
  22         struct vc4_dev *vc4 = to_vc4_dev(drm);
  23 +       struct drm_plane *plane = state->plane;
  24         struct vc4_plane_state *vc4_state = to_vc4_plane_state(state);
  25         unsigned long irqflags;
  26         u32 lbm_size;
  27 @@ -743,6 +744,9 @@ static int vc4_plane_allocate_lbm(struct
  28         if (!lbm_size)
  29                 return 0;
  30
  31 +       drm_dbg_driver(drm, "[PLANE:%d:%s] LBM Allocation Size: %u\n",
  32 +                      plane->base.id, plane->name, lbm_size);
  33 +
  34         if (WARN_ON(!vc4_state->lbm_offset))
  35                 return -EINVAL;
  36