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@xxxxxxxxx>
---
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
--
1.9.1
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