Add Plane Degamma as a blob property and plane degamma size as a range property.
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 | 9 +++++++++ drivers/gpu/drm/drm_atomic.c | 12 ++++++++++++ drivers/gpu/drm/drm_atomic_helper.c | 6 ++++++ drivers/gpu/drm/drm_plane.c | 35 +++++++++++++++++++++++++++++++++++ include/drm/drm_plane.h | 26 ++++++++++++++++++++++++++ 5 files changed, 88 insertions(+)
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst index 56a3780..2c943f6 100644 --- a/Documentation/gpu/drm-kms.rst +++ b/Documentation/gpu/drm-kms.rst @@ -532,6 +532,15 @@ Color Management Properties .. kernel-doc:: drivers/gpu/drm/drm_color_mgmt.c :export:
+Plane Color Management Properties +--------------------------- + +.. kernel-doc:: drivers/gpu/drm/drm_plane.c + :doc: degamma_lut_property + +.. kernel-doc:: drivers/gpu/drm/drm_plane.c + :doc: degamma_lut_size_property + Tile Group Property -------------------
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 34b7d42..409c058 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -717,6 +717,8 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane, { struct drm_device *dev = plane->dev; struct drm_mode_config *config = &dev->mode_config; + bool replaced = false; + int ret;
if (property == config->prop_fb_id) { struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val); @@ -763,6 +765,12 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane, state->color_encoding = val; } else if (property == plane->color_range_property) { state->color_range = val; + } else if (property == plane->degamma_lut_property) { + ret = drm_atomic_replace_property_blob_from_id(dev, + &state->degamma_lut, + val, -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); @@ -826,6 +834,9 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane, *val = state->color_encoding; } else if (property == plane->color_range_property) { *val = state->color_range; + } else if (property == plane->degamma_lut_property) { + *val = (state->degamma_lut) ? + state->degamma_lut->base.id : 0; } else if (plane->funcs->atomic_get_property) { return plane->funcs->atomic_get_property(plane, state, property, val); } else { @@ -958,6 +969,7 @@ static void drm_atomic_plane_print_state(struct drm_printer *p, drm_get_color_encoding_name(state->color_encoding)); drm_printf(p, "\tcolor-range=%s\n", drm_get_color_range_name(state->color_range)); + drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
if (plane->funcs->atomic_print_state) plane->funcs->atomic_print_state(p, state); diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index ae3cbfe..d9384fd 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -3504,6 +3504,10 @@ void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
state->fence = NULL; state->commit = NULL; + + if (state->degamma_lut) + drm_property_reference_blob(state->degamma_lut); + state->color_mgmt_changed = false; } EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state);
@@ -3548,6 +3552,8 @@ void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state)
if (state->commit) drm_crtc_commit_put(state->commit); + + drm_property_unreference_blob(state->degamma_lut); } 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 e706da6..543a693 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -474,6 +474,41 @@ int drm_mode_plane_set_obj_prop(struct drm_plane *plane, } EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
+/** + * DOC: degamma_lut_property + * + * degamma_lut_property: + * Blob property which allows a userspace to provide LUT values + * to apply degamma curve using the h/w plane degamma processing + * engine, thereby making the content as linear for further color + * processing. + * + * degamma_lut_size_property: + * Range Property to indicate size of the plane degamma LUT. + */ +int drm_plane_color_create_prop(struct drm_device *dev, + struct drm_plane *plane) +{ + struct drm_property *prop; + + prop = drm_property_create(dev, + DRM_MODE_PROP_BLOB, + "PLANE_DEGAMMA_LUT", 0); + if (!prop) + return -ENOMEM; + plane->degamma_lut_property = prop; + + prop = drm_property_create_range(dev, + DRM_MODE_PROP_IMMUTABLE, + "PLANE_DEGAMMA_LUT_SIZE", 0, UINT_MAX); + if (!prop) + return -ENOMEM; + plane->degamma_lut_size_property = prop; + + return 0; +} +EXPORT_SYMBOL(drm_plane_color_create_prop); + int drm_mode_getplane_res(struct drm_device *dev, void *data, struct drm_file *file_priv) { diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index f7bf4a4..03291b1 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -138,6 +138,14 @@ struct drm_plane_state { */ bool visible;
+ /* @degamma_lut: + * + * Lookup table for converting framebuffer pixel data before apply the + * color conversion matrix @ctm. See drm_plane_enable_color_mgmt(). The + * blob (if not NULL) is an array of &struct drm_color_lut_ext. + */ + struct drm_property_blob *degamma_lut; + /** * @commit: Tracks the pending commit to prevent use-after-free conditions, * and for async plane updates. @@ -147,6 +155,8 @@ struct drm_plane_state { struct drm_crtc_commit *commit;
struct drm_atomic_state *state; + + bool color_mgmt_changed : 1; };
static inline struct drm_rect @@ -499,6 +509,8 @@ enum drm_plane_type { * @zpos_property: zpos property for this plane * @rotation_property: rotation property for this plane * @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 */ struct drm_plane { struct drm_device *dev; @@ -590,6 +602,18 @@ struct drm_plane { * See drm_plane_create_color_properties(). */ struct drm_property *color_range_property; + + /** + * @degamma_lut_property: Optional Plane property to set the LUT + * used to convert the framebuffer's colors to linear gamma. + */ + struct drm_property *degamma_lut_property; + + /** + * @degamma_lut_size_property: Optional Plane property for the + * size of the degamma LUT as supported by the driver (read-only). + */ + struct drm_property *degamma_lut_size_property; };
#define obj_to_plane(x) container_of(x, struct drm_plane, base) @@ -629,6 +653,8 @@ static inline unsigned int drm_plane_index(struct drm_plane *plane) int drm_mode_plane_set_obj_prop(struct drm_plane *plane, struct drm_property *property, uint64_t value); +int drm_plane_color_create_prop(struct drm_device *dev, + struct drm_plane *plane);
/** * drm_plane_find - find a &drm_plane