[RFC PATCH 4/5] drm/amd/display: Enable plane 3DLUT mode

[Alex Hung]

Enable the 3D LUT mode supported by amdgpu.

Note: A patchset "IGT tests for pre-blending 3D LUT interfaces" for this
proposal is sent to IGT mailing list.

Signed-off-by: Alex Hung <alex.hung at amd.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |  3 ++
 drivers/gpu/drm/drm_color_mgmt.c              | 31 +++++++++++++++++++
 include/drm/drm_plane.h                       |  2 ++
 3 files changed, 36 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index ee277f357140..7094578a683f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -8008,6 +8008,9 @@ static int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
 
 	/* TODO need to check ASICs */
 	drm_plane_create_3d_lut_properties(plane->dev, plane, 1);
+	res = drm_plane_color_add_3dlut_mode(plane, "3dlut_17_12bit", &lut_3d_mode_17_12bit, sizeof(lut_3d_mode_17_12bit));
+	if (res)
+		return res;
 	drm_plane_attach_3dlut_properties(plane);
 
 	/* Create (reset) the plane state */
diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index 4bfe5b5c9670..5418ca24db73 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -743,6 +743,37 @@ void drm_plane_attach_3dlut_properties(struct drm_plane *plane)
 }
 EXPORT_SYMBOL(drm_plane_attach_3dlut_properties);
 
+int drm_plane_color_add_3dlut_mode(struct drm_plane *plane,
+						 const char *name,
+						 const struct drm_mode_3dlut_mode *mode_3dlut,
+						 size_t length)
+{
+	struct drm_property_blob *blob;
+	struct drm_property *prop = NULL;
+	int ret;
+
+	prop = plane->lut_3d_mode_property;
+
+	if (!prop)
+		return -EINVAL;
+
+	if (length == 0 && name)
+		return drm_property_add_enum(prop, 0, name);
+
+	blob = drm_property_create_blob(plane->dev, length, mode_3dlut);
+	if (IS_ERR(blob))
+		return PTR_ERR(blob);
+
+	ret = drm_property_add_enum(prop, blob->base.id, name);
+	if (ret) {
+		drm_property_blob_put(blob);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_plane_color_add_3dlut_mode);
+
 int drm_plane_color_add_gamma_degamma_mode_range(struct drm_plane *plane,
 						 const char *name,
 						 const struct drm_color_lut_range *ranges,
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 4e272144170f..f94f91466675 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -946,6 +946,8 @@ int drm_plane_create_3d_lut_properties(struct drm_device *dev,
 					   struct drm_plane *plane,
 					   int num_values);
 void drm_plane_attach_3dlut_properties(struct drm_plane *plane);
+int drm_plane_color_add_3dlut_mode(struct drm_plane *plane, const char *name,
+						 const struct drm_mode_3dlut_mode *mode_3dlut, size_t length);
 int drm_plane_color_add_gamma_degamma_mode_range(struct drm_plane *plane,
 						 const char *name,
 						 const struct drm_color_lut_range *ranges,
-- 
2.37.3