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.
Signed-off-by: Uma Shankar uma.shankar@intel.com --- Documentation/gpu/drm-kms.rst | 3 +++ drivers/gpu/drm/drm_atomic.c | 10 ++++++++++ drivers/gpu/drm/drm_atomic_helper.c | 3 +++ drivers/gpu/drm/drm_plane.c | 12 ++++++++++++ include/drm/drm_plane.h | 16 ++++++++++++++++ 5 files changed, 44 insertions(+)
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst index 2c943f6..69b0b56 100644 --- a/Documentation/gpu/drm-kms.rst +++ b/Documentation/gpu/drm-kms.rst @@ -541,6 +541,9 @@ 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 409c058..f86384fa 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -771,6 +771,14 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane, val, -1, &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), + &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); @@ -837,6 +845,8 @@ 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 d9384fd..76b4b41 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -3507,6 +3507,8 @@ void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
if (state->degamma_lut) drm_property_reference_blob(state->degamma_lut); + if (state->ctm) + drm_property_reference_blob(state->ctm); state->color_mgmt_changed = false; } EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); @@ -3554,6 +3556,7 @@ void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state) drm_crtc_commit_put(state->commit);
drm_property_unreference_blob(state->degamma_lut); + drm_property_unreference_blob(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 543a693..e635b63 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -485,6 +485,11 @@ 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) @@ -505,6 +510,13 @@ 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 03291b1..35535c5 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -147,6 +147,14 @@ 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. * @@ -511,6 +519,7 @@ enum drm_plane_type { * @helper_private: mid-layer private data * @degamma_lut_property: Property for plane degamma LUT * @degamma_lut_size_property: Property for size of plane degamma LUT + * @ctm_property: Property for plane CTM matrix */ struct drm_plane { struct drm_device *dev; @@ -614,6 +623,13 @@ 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)