[PATCH v4 30/32] drm/amd/display: add plane CTM driver-specific property

[Melissa Wen]

Plane CTM for pre-blending color space conversion. Only enable
driver-specific plane CTM property on drivers that support both pre- and
post-blending gamut remap matrix, i.e., DCN3+ family. Otherwise it
conflits with DRM CRTC CTM property.

Reviewed-by: Harry Wentland <harry.wentland at amd.com>
Signed-off-by: Melissa Wen <mwen at igalia.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h      |  2 ++
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  7 +++++++
 .../amd/display/amdgpu_dm/amdgpu_dm_color.c   |  7 +++++++
 .../amd/display/amdgpu_dm/amdgpu_dm_plane.c   | 20 +++++++++++++++++++
 4 files changed, 36 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
index 071cc10bfd90..1347022ce57d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -363,6 +363,8 @@ struct amdgpu_mode_info {
 	 * @plane_hdr_mult_property:
 	 */
 	struct drm_property *plane_hdr_mult_property;
+
+	struct drm_property *plane_ctm_property;
 	/**
 	 * @shaper_lut_property: Plane property to set pre-blending shaper LUT
 	 * that converts color content before 3D LUT. If
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 219efa7fe181..c9cd2e5f79ae 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -784,6 +784,13 @@ struct dm_plane_state {
 	 * TF is needed for any subsequent linear-to-non-linear transforms.
 	 */
 	__u64 hdr_mult;
+	/**
+	 * @ctm:
+	 *
+	 * Color transformation matrix. The blob (if not NULL) is a &struct
+	 * drm_color_ctm_3x4.
+	 */
+	struct drm_property_blob *ctm;
 	/**
 	 * @shaper_lut: shaper lookup table blob. The blob (if not NULL) is an
 	 * array of &struct drm_color_lut.
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
index 251b5f14bd89..41c5926ca068 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
@@ -239,6 +239,13 @@ amdgpu_dm_create_color_properties(struct amdgpu_device *adev)
 		return -ENOMEM;
 	adev->mode_info.plane_hdr_mult_property = prop;
 
+	prop = drm_property_create(adev_to_drm(adev),
+				   DRM_MODE_PROP_BLOB,
+				   "AMD_PLANE_CTM", 0);
+	if (!prop)
+		return -ENOMEM;
+	adev->mode_info.plane_ctm_property = prop;
+
 	prop = drm_property_create(adev_to_drm(adev),
 				   DRM_MODE_PROP_BLOB,
 				   "AMD_PLANE_SHAPER_LUT", 0);
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index f1070ca7076a..d9537d9bf18c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -1361,6 +1361,8 @@ dm_drm_plane_duplicate_state(struct drm_plane *plane)
 
 	if (dm_plane_state->degamma_lut)
 		drm_property_blob_get(dm_plane_state->degamma_lut);
+	if (dm_plane_state->ctm)
+		drm_property_blob_get(dm_plane_state->ctm);
 	if (dm_plane_state->shaper_lut)
 		drm_property_blob_get(dm_plane_state->shaper_lut);
 	if (dm_plane_state->lut3d)
@@ -1442,6 +1444,8 @@ static void dm_drm_plane_destroy_state(struct drm_plane *plane,
 
 	if (dm_plane_state->degamma_lut)
 		drm_property_blob_put(dm_plane_state->degamma_lut);
+	if (dm_plane_state->ctm)
+		drm_property_blob_put(dm_plane_state->ctm);
 	if (dm_plane_state->lut3d)
 		drm_property_blob_put(dm_plane_state->lut3d);
 	if (dm_plane_state->shaper_lut)
@@ -1479,6 +1483,11 @@ dm_atomic_plane_attach_color_mgmt_properties(struct amdgpu_display_manager *dm,
 				   dm->adev->mode_info.plane_hdr_mult_property,
 				   AMDGPU_HDR_MULT_DEFAULT);
 
+	/* Only enable plane CTM if both DPP and MPC gamut remap is available. */
+	if (dm->dc->caps.color.mpc.gamut_remap)
+		drm_object_attach_property(&plane->base,
+					   dm->adev->mode_info.plane_ctm_property, 0);
+
 	if (dpp_color_caps.hw_3d_lut) {
 		drm_object_attach_property(&plane->base,
 					   mode_info.plane_shaper_lut_property, 0);
@@ -1536,6 +1545,14 @@ dm_atomic_plane_set_property(struct drm_plane *plane,
 			dm_plane_state->hdr_mult = val;
 			dm_plane_state->base.color_mgmt_changed = 1;
 		}
+	} else if (property == adev->mode_info.plane_ctm_property) {
+		ret = drm_property_replace_blob_from_id(plane->dev,
+							&dm_plane_state->ctm,
+							val,
+							sizeof(struct drm_color_ctm), -1,
+							&replaced);
+		dm_plane_state->base.color_mgmt_changed |= replaced;
+		return ret;
 	} else if (property == adev->mode_info.plane_shaper_lut_property) {
 		ret = drm_property_replace_blob_from_id(plane->dev,
 							&dm_plane_state->shaper_lut,
@@ -1597,6 +1614,9 @@ dm_atomic_plane_get_property(struct drm_plane *plane,
 		*val = dm_plane_state->degamma_tf;
 	} else if (property == adev->mode_info.plane_hdr_mult_property) {
 		*val = dm_plane_state->hdr_mult;
+	} else if (property == adev->mode_info.plane_ctm_property) {
+		*val = (dm_plane_state->ctm) ?
+			dm_plane_state->ctm->base.id : 0;
 	} else 	if (property == adev->mode_info.plane_shaper_lut_property) {
 		*val = (dm_plane_state->shaper_lut) ?
 			dm_plane_state->shaper_lut->base.id : 0;
-- 
2.40.1