target/linux/bcm27xx/patches-5.15/950-0903-drm-vc4-plane-Register-a-different-drm_plane_helper_.patch

   1 From 597258e5effb6ab56a116823e8cb88ccc578ec06 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Thu, 21 Apr 2022 11:39:27 +0200
   4 Subject: [PATCH] drm/vc4: plane: Register a different
   5  drm_plane_helper_funcs on BCM2711
   6
   7 On the BCM2711, our current definition of drm_plane_helper_funcs uses
   8 the custom vc4_prepare_fb() and vc4_cleanup_fb().
   9
  10 Those functions rely on the buffer allocation path that was relying on
  11 the GPU, and is no longer relevant.
  12
  13 Let's create another drm_plane_helper_funcs structure that we will
  14 register on the BCM2711.
  15
  16 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  17 ---
  18  drivers/gpu/drm/vc4/vc4_plane.c | 12 +++++++++++-
  19  1 file changed, 11 insertions(+), 1 deletion(-)
  20
  21 --- a/drivers/gpu/drm/vc4/vc4_plane.c
  22 +++ b/drivers/gpu/drm/vc4/vc4_plane.c
  23 @@ -1502,6 +1502,13 @@ static const struct drm_plane_helper_fun
  24         .atomic_async_update = vc4_plane_atomic_async_update,
  25  };
  26
  27 +static const struct drm_plane_helper_funcs vc5_plane_helper_funcs = {
  28 +       .atomic_check = vc4_plane_atomic_check,
  29 +       .atomic_update = vc4_plane_atomic_update,
  30 +       .atomic_async_check = vc4_plane_atomic_async_check,
  31 +       .atomic_async_update = vc4_plane_atomic_async_update,
  32 +};
  33 +
  34  static bool vc4_format_mod_supported(struct drm_plane *plane,
  35                                      uint32_t format,
  36                                      uint64_t modifier)
  37 @@ -1606,7 +1613,10 @@ struct drm_plane *vc4_plane_init(struct
  38         if (ret)
  39                 return ERR_PTR(ret);
  40
  41 -       drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
  42 +       if (vc4->is_vc5)
  43 +               drm_plane_helper_add(plane, &vc5_plane_helper_funcs);
  44 +       else
  45 +               drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
  46
  47         drm_plane_create_alpha_property(plane);
  48         drm_plane_create_blend_mode_property(plane,