target/linux/bcm27xx/patches-5.15/950-0902-drm-vc4-kms-Register-a-different-drm_mode_config_fun.patch

   1 From 407b0fcd8becc2c948bbe3337db0cf2a45f19949 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Thu, 21 Apr 2022 11:13:00 +0200
   4 Subject: [PATCH] drm/vc4: kms: Register a different
   5  drm_mode_config_funcs on BCM2711
   6
   7 On the BCM2711, our current definition of drm_mode_config_funcs uses the
   8 custom vc4_fb_create().
   9
  10 However, that function relies on the buffer allocation path that was
  11 relying on the GPU, and is no longer relevant.
  12
  13 Let's create another drm_mode_config_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_kms.c | 8 +++++++-
  19  1 file changed, 7 insertions(+), 1 deletion(-)
  20
  21 --- a/drivers/gpu/drm/vc4/vc4_kms.c
  22 +++ b/drivers/gpu/drm/vc4/vc4_kms.c
  23 @@ -992,6 +992,12 @@ static const struct drm_mode_config_func
  24         .fb_create = vc4_fb_create,
  25  };
  26
  27 +static const struct drm_mode_config_funcs vc5_mode_funcs = {
  28 +       .atomic_check = vc4_atomic_check,
  29 +       .atomic_commit = drm_atomic_helper_commit,
  30 +       .fb_create = drm_gem_fb_create,
  31 +};
  32 +
  33  int vc4_kms_load(struct drm_device *dev)
  34  {
  35         struct vc4_dev *vc4 = to_vc4_dev(dev);
  36 @@ -1026,7 +1032,7 @@ int vc4_kms_load(struct drm_device *dev)
  37                 dev->mode_config.max_height = 2048;
  38         }
  39
  40 -       dev->mode_config.funcs = &vc4_mode_funcs;
  41 +       dev->mode_config.funcs = vc4->is_vc5 ? &vc5_mode_funcs : &vc4_mode_funcs;
  42         dev->mode_config.helper_private = &vc4_mode_config_helpers;
  43         dev->mode_config.preferred_depth = 24;
  44         dev->mode_config.async_page_flip = true;