Add a blob property for plane CSC usage.
v2: Rebase
v3: Fixed Sean, Paul's review comments. Moved the property from
mode_config to drm_plane. Created a helper function to instantiate
these properties and removed from drm_mode_create_standard_properties
Added property documentation as suggested by Daniel, Vetter.
v4: Rebase
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
Documentation/gpu/drm-kms.rst | 3 +++
drivers/gpu/drm/drm_atomic.c | 10 ++++++++++
drivers/gpu/drm/drm_atomic_helper.c | 4 ++++
drivers/gpu/drm/drm_plane.c | 12 ++++++++++++
include/drm/drm_plane.h | 15 +++++++++++++++
5 files changed, 44 insertions(+)
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
index 8b10b12..16d6d8d 100644
--- a/Documentation/gpu/drm-kms.rst
+++ b/Documentation/gpu/drm-kms.rst
@@ -560,6 +560,9 @@ Plane Color Management Properties
.. kernel-doc:: drivers/gpu/drm/drm_plane.c
:doc: degamma_lut_size_property
+.. kernel-doc:: drivers/gpu/drm/drm_plane.c
+ :doc: ctm_property
+
Tile Group Property
-------------------
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index f8cad9b..ddda935 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -917,6 +917,14 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane,
&replaced);
state->color_mgmt_changed |= replaced;
return ret;
+ } else if (property == plane->ctm_property) {
+ ret = drm_atomic_replace_property_blob_from_id(dev,
+ &state->ctm,
+ val,
+ sizeof(struct drm_color_ctm), -1,
+ &replaced);
+ state->color_mgmt_changed |= replaced;
+ return ret;
} else if (plane->funcs->atomic_set_property) {
return plane->funcs->atomic_set_property(plane, state,
property, val);
@@ -988,6 +996,8 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane,
} else if (property == plane->degamma_lut_property) {
*val = (state->degamma_lut) ?
state->degamma_lut->base.id : 0;
+ } else if (property == plane->ctm_property) {
+ *val = (state->ctm) ? state->ctm->base.id : 0;
} else if (plane->funcs->atomic_get_property) {
return plane->funcs->atomic_get_property(plane, state, property, val);
} else {
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 67c5b51..866181f 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -3616,6 +3616,9 @@ void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
if (state->degamma_lut)
drm_property_blob_get(state->degamma_lut);
+ if (state->ctm)
+ drm_property_blob_get(state->ctm);
+
state->color_mgmt_changed = false;
}
EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
@@ -3663,6 +3666,7 @@ void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
drm_crtc_commit_put(state->commit);
drm_property_blob_put(state->degamma_lut);
+ drm_property_blob_put(state->ctm);
}
EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state);
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 03e0560..97520b1 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -489,6 +489,11 @@ int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
*
* degamma_lut_size_property:
* Range Property to indicate size of the plane degamma LUT.
+ *
+ * ctm_property:
+ * Blob property which allows a userspace to provide CTM coefficients
+ * to do color space conversion or any other enhancement by doing a
+ * matrix multiplication using the h/w CTM processing engine
*/
int drm_plane_color_create_prop(struct drm_device *dev,
struct drm_plane *plane)
@@ -509,6 +514,13 @@ int drm_plane_color_create_prop(struct drm_device *dev,
return -ENOMEM;
plane->degamma_lut_size_property = prop;
+ prop = drm_property_create(dev,
+ DRM_MODE_PROP_BLOB,
+ "PLANE_CTM", 0);
+ if (!prop)
+ return -ENOMEM;
+ plane->ctm_property = prop;
+
return 0;
}
EXPORT_SYMBOL(drm_plane_color_create_prop);
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 28357ac..5143277 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -183,6 +183,14 @@ struct drm_plane_state {
struct drm_property_blob *degamma_lut;
/**
+ * @ctm:
+ *
+ * Color transformation matrix. See drm_plane_enable_color_mgmt(). The
+ * blob (if not NULL) is a &struct drm_color_ctm.
+ */
+ struct drm_property_blob *ctm;
+
+ /**
* @commit: Tracks the pending commit to prevent use-after-free conditions,
* and for async plane updates.
*
@@ -698,6 +706,13 @@ struct drm_plane {
* size of the degamma LUT as supported by the driver (read-only).
*/
struct drm_property *degamma_lut_size_property;
+
+ /**
+ * @plane_ctm_property: Optional Plane property to set the
+ * matrix used to convert colors after the lookup in the
+ * degamma LUT.
+ */
+ struct drm_property *ctm_property;
};
#define obj_to_plane(x) container_of(x, struct drm_plane, base)
--
1.9.1
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