target/linux/bcm27xx/patches-5.15/950-0780-drm-object-Add-default-color-encoding-and-range-valu.patch

   1 From 2506f4df7531123573ab9f11c9f032ffbb025c1d Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Mon, 21 Feb 2022 10:59:14 +0100
   4 Subject: [PATCH] drm/object: Add default color encoding and range
   5  value at reset
   6
   7 Upstream commit 9a48ab11714c955456fefdd4ab532d324fbef563
   8
   9 The drm_plane_create_color_properties() function asks for an initial
  10 value for the color encoding and range, and will set the associated
  11 plane state variable with that value if a state is present.
  12
  13 However, that function is usually called at a time where there's no
  14 state yet. Since the drm_plane_state reset helper doesn't take care of
  15 reading that value when it's called, it means that in most cases the
  16 initial value will be 0 (so DRM_COLOR_YCBCR_BT601 and
  17 DRM_COLOR_YCBCR_LIMITED_RANGE, respectively), or the drivers will have
  18 to work around it.
  19
  20 Let's add some code in __drm_atomic_helper_plane_state_reset() to get
  21 the initial encoding and range value if the property has been attached
  22 in order to fix this.
  23
  24 Reviewed-by: Harry Wentland <harry.wentland@amd.com>
  25 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  26 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  27 Link: https://patchwork.freedesktop.org/patch/msgid/20220221095918.18763-19-maxime@cerno.tech
  28 ---
  29  drivers/gpu/drm/drm_atomic_state_helper.c | 14 ++++++++++++++
  30  1 file changed, 14 insertions(+)
  31
  32 --- a/drivers/gpu/drm/drm_atomic_state_helper.c
  33 +++ b/drivers/gpu/drm/drm_atomic_state_helper.c
  34 @@ -251,6 +251,20 @@ void __drm_atomic_helper_plane_state_res
  35         plane_state->alpha = DRM_BLEND_ALPHA_OPAQUE;
  36         plane_state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
  37
  38 +       if (plane->color_encoding_property) {
  39 +               if (!drm_object_property_get_default_value(&plane->base,
  40 +                                                          plane->color_encoding_property,
  41 +                                                          &val))
  42 +                       plane_state->color_encoding = val;
  43 +       }
  44 +
  45 +       if (plane->color_range_property) {
  46 +               if (!drm_object_property_get_default_value(&plane->base,
  47 +                                                          plane->color_range_property,
  48 +                                                          &val))
  49 +                       plane_state->color_range = val;
  50 +       }
  51 +
  52         if (plane->zpos_property) {
  53                 if (!drm_object_property_get_default_value(&plane->base,
  54                                                            plane->zpos_property,