Currently the plane property doesn't have support for YCBCR_BT2020,
which enables the corresponding color conversion mode on plane CSC.
Enabling the plane property for the planes for GLK & ICL+ platforms.

V2: Enabling support for YCBCT_BT2020 for HDR planes on
    platforms GLK & ICL

V3: Refined the condition check to handle GLK & ICL+ HDR planes
    Also added BT2020 handling in glk_plane_color_ctl.

V4: Combine If-else into single If

V5: Drop the checking for HDR planes and enable YCBCR_BT2020
    for platforms GLK & ICL+.

Cc: Ville Syrjala <ville.syrj...@linux.intel.com>
Cc: Uma Shankar <uma.shan...@intel.com>
Cc: Jani Nikula <jani.nik...@intel.com>
Signed-off-by: Kishore Kadiyala <kishore.kadiy...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 12 +++++++++---
 drivers/gpu/drm/i915/display/intel_sprite.c  |  9 +++++++--
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c 
b/drivers/gpu/drm/i915/display/intel_display.c
index 70ec301fe6e3..f2dfa61a49fa 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -4808,11 +4808,17 @@ u32 glk_plane_color_ctl(const struct intel_crtc_state 
*crtc_state,
        plane_color_ctl |= glk_plane_color_ctl_alpha(plane_state);
 
        if (fb->format->is_yuv && !icl_is_hdr_plane(dev_priv, plane->id)) {
-               if (plane_state->hw.color_encoding == DRM_COLOR_YCBCR_BT709)
+               switch (plane_state->hw.color_encoding) {
+               case DRM_COLOR_YCBCR_BT709:
                        plane_color_ctl |= 
PLANE_COLOR_CSC_MODE_YUV709_TO_RGB709;
-               else
+                       break;
+               case DRM_COLOR_YCBCR_BT2020:
+                       plane_color_ctl |=
+                                       PLANE_COLOR_CSC_MODE_YUV2020_TO_RGB2020;
+                       break;
+               default:
                        plane_color_ctl |= 
PLANE_COLOR_CSC_MODE_YUV601_TO_RGB709;
-
+               }
                if (plane_state->hw.color_range == DRM_COLOR_YCBCR_FULL_RANGE)
                        plane_color_ctl |= 
PLANE_COLOR_YUV_RANGE_CORRECTION_DISABLE;
        } else if (fb->format->is_yuv) {
diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c 
b/drivers/gpu/drm/i915/display/intel_sprite.c
index deda351719db..0072525046a1 100644
--- a/drivers/gpu/drm/i915/display/intel_sprite.c
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -3031,6 +3031,7 @@ skl_universal_plane_create(struct drm_i915_private 
*dev_priv,
        struct intel_plane *plane;
        enum drm_plane_type plane_type;
        unsigned int supported_rotations;
+       unsigned int supported_csc;
        const u64 *modifiers;
        const u32 *formats;
        int num_formats;
@@ -3105,9 +3106,13 @@ skl_universal_plane_create(struct drm_i915_private 
*dev_priv,
                                           DRM_MODE_ROTATE_0,
                                           supported_rotations);
 
+       supported_csc = BIT(DRM_COLOR_YCBCR_BT601) | BIT(DRM_COLOR_YCBCR_BT709);
+
+       if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
+               supported_csc |= BIT(DRM_COLOR_YCBCR_BT2020);
+
        drm_plane_create_color_properties(&plane->base,
-                                         BIT(DRM_COLOR_YCBCR_BT601) |
-                                         BIT(DRM_COLOR_YCBCR_BT709),
+                                         supported_csc,
                                          BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
                                          BIT(DRM_COLOR_YCBCR_FULL_RANGE),
                                          DRM_COLOR_YCBCR_BT709,
-- 
2.17.1

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