[PATCH 02/10] drm: Add Plane Degamma properties

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From: "uma.shankar at intel.com (Uma Shankar)" <uma.shankar@xxxxxxxxx>

Add Plane Degamma as a blob property and plane
degamma size as a range property.

(am from https://patchwork.kernel.org/patch/10046515/)

Change-Id: Iaead6f944a8b677227d1be11169f46178de533b1
Signed-off-by: Uma Shankar <uma.shankar at intel.com>
---
 drivers/gpu/drm/drm_atomic.c        | 12 ++++++++++++
 drivers/gpu/drm/drm_atomic_helper.c |  7 +++++++
 drivers/gpu/drm/drm_mode_config.c   | 14 ++++++++++++++
 include/drm/drm_mode_config.h       | 10 ++++++++++
 include/drm/drm_plane.h             | 10 ++++++++++
 5 files changed, 53 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index b76d49218cf1d..4a06ff2fd1a5e 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);
@@ -762,6 +764,12 @@ static int drm_atomic_plane_set_property(struct drm_plane *plane,
 	} else if (plane->funcs->atomic_set_property) {
 		return plane->funcs->atomic_set_property(plane, state,
 				property, val);
+	} else if (property == config->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 {
 		return -EINVAL;
 	}
@@ -820,6 +828,9 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
 		*val = state->zpos;
 	} else if (plane->funcs->atomic_get_property) {
 		return plane->funcs->atomic_get_property(plane, state, property, val);
+	} else if (property == config->plane_degamma_lut_property) {
+		*val = (state->degamma_lut) ?
+			state->degamma_lut->base.id : 0;
 	} else {
 		return -EINVAL;
 	}
@@ -944,6 +955,7 @@ static void drm_atomic_plane_print_state(struct drm_printer *p,
 	drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
 	drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
 	drm_printf(p, "\trotation=%x\n", state->rotation);
+	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 ab4032167094c..d3eaf4d397681 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -3488,7 +3488,12 @@ void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
 		drm_framebuffer_get(state->fb);
 
 	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);
 
@@ -3533,6 +3538,8 @@ 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_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index e5c653357024d..7d8e74715b565 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -348,6 +348,20 @@ static int drm_mode_create_standard_properties(struct drm_device *dev)
 		return -ENOMEM;
 	dev->mode_config.modifiers_property = prop;
 
+	prop = drm_property_create(dev,
+			DRM_MODE_PROP_BLOB,
+			"PLANE_DEGAMMA_LUT", 0);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.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;
+	dev->mode_config.plane_degamma_lut_size_property = prop;
+
 	return 0;
 }
 
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 2cb6f02df64ab..dcec93d062b4d 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -724,6 +724,16 @@ struct drm_mode_config {
 	 * the degamma LUT as supported by the driver (read-only).
 	 */
 	struct drm_property *degamma_lut_size_property;
+ 	/**
+	 * @plane_degamma_lut_property: Optional Plane property to set the LUT
+	 * used to convert the framebuffer's colors to linear gamma.
+	 */
+	struct drm_property *plane_degamma_lut_property;
+	/**
+	 * @plane_degamma_lut_size_property: Optional Plane property for the
+	 * size of the degamma LUT as supported by the driver (read-only).
+	 */
+	struct drm_property *plane_degamma_lut_size_property;
 	/**
 	 * @ctm_property: Optional CRTC property to set the
 	 * matrix used to convert colors after the lookup in the
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 8185e3468a231..2f8f5db77a406 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -131,7 +131,17 @@ struct drm_plane_state {
 	 */
 	struct drm_crtc_commit *commit;
 
+	/* @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.
+	 */
+	struct drm_property_blob *degamma_lut;
+
 	struct drm_atomic_state *state;
+
+	bool color_mgmt_changed : 1;
 };
 
 static inline struct drm_rect
-- 
2.16.1.291.g4437f3f132-goog

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