[PATCH 02/10] drm/crtc: Expose API to create drm crtc property for histogram

[Arun R Murthy <arun.r.murthy@xxxxxxxxx>]

Add drm-crtc property for histogram and for the properties added add
corresponding get/set_property.

Signed-off-by: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
---
 drivers/gpu/drm/drm_atomic_state_helper.c |  6 +++++
 drivers/gpu/drm/drm_atomic_uapi.c         | 17 +++++++++++++
 drivers/gpu/drm/drm_crtc.c                | 30 +++++++++++++++++++++++
 include/drm/drm_crtc.h                    |  1 +
 4 files changed, 54 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index 519228eb1095..3b2b58e36a6d 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -143,6 +143,8 @@ void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 		drm_property_blob_get(state->ctm);
 	if (state->gamma_lut)
 		drm_property_blob_get(state->gamma_lut);
+	if (state->histogram_data)
+		drm_property_blob_get(state->histogram_data);
 	state->mode_changed = false;
 	state->active_changed = false;
 	state->planes_changed = false;
@@ -156,6 +158,8 @@ void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 	/* Self refresh should be canceled when a new update is available */
 	state->active = drm_atomic_crtc_effectively_active(state);
 	state->self_refresh_active = false;
+
+	state->histogram_iet_updated = false;
 }
 EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state);
 
@@ -215,6 +219,8 @@ void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state)
 	drm_property_blob_put(state->degamma_lut);
 	drm_property_blob_put(state->ctm);
 	drm_property_blob_put(state->gamma_lut);
+	if (state->histogram_data)
+		drm_property_blob_put(state->histogram_data);
 }
 EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state);
 
diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 370dc676e3aa..367f87afea92 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -415,6 +415,17 @@ static int drm_atomic_crtc_set_property(struct drm_crtc *crtc,
 			return -EFAULT;
 
 		set_out_fence_for_crtc(state->state, crtc, fence_ptr);
+	} else if (property == crtc->histogram_enable_property) {
+		state->histogram_enable = val;
+	} else if (property == crtc->histogram_iet_property) {
+		ret = drm_property_replace_blob_from_id(dev,
+							&state->histogram_iet,
+							val,
+							-1,
+							sizeof(struct drm_histogram),
+							&replaced);
+		state->histogram_iet_updated |= replaced;
+		return ret;
 	} else if (property == crtc->scaling_filter_property) {
 		state->scaling_filter = val;
 	} else if (crtc->funcs->atomic_set_property) {
@@ -452,6 +463,12 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc,
 		*val = (state->gamma_lut) ? state->gamma_lut->base.id : 0;
 	else if (property == config->prop_out_fence_ptr)
 		*val = 0;
+	else if (property == crtc->histogram_enable_property)
+		*val = state->histogram_enable;
+	else if (property == crtc->histogram_data_property)
+		*val = (state->histogram_data) ? state->histogram_data->base.id : 0;
+	else if (property == crtc->histogram_iet_property)
+		*val = (state->histogram_iet) ? state->histogram_iet->base.id : 0;
 	else if (property == crtc->scaling_filter_property)
 		*val = state->scaling_filter;
 	else if (crtc->funcs->atomic_get_property)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 3488ff067c69..ec169a5b35a2 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -939,3 +939,33 @@ int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc,
 	return 0;
 }
 EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property);
+
+int drm_crtc_create_histogram_property(struct drm_crtc *crtc)
+{
+	struct drm_property *prop;
+
+	prop = drm_property_create_bool(crtc->dev, DRM_MODE_PROP_ATOMIC,
+					"HISTOGRAM_ENABLE");
+	if (!prop)
+		return -ENOMEM;
+	drm_object_attach_property(&crtc->base, prop, 0);
+	crtc->histogram_enable_property = prop;
+
+	prop = drm_property_create(crtc->dev, DRM_MODE_PROP_ATOMIC |
+				   DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
+				   "HISTOGRAM_DATA", 0);
+	if (!prop)
+		return -ENOMEM;
+	drm_object_attach_property(&crtc->base, prop, 0);
+	crtc->histogram_data_property = prop;
+
+	prop = drm_property_create(crtc->dev, DRM_MODE_PROP_ATOMIC |
+				   DRM_MODE_PROP_BLOB, "HISTOGRAM_IET", 0);
+	if (!prop)
+		return -ENOMEM;
+	drm_object_attach_property(&crtc->base, prop, 0);
+	crtc->histogram_iet_property = prop;
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_crtc_create_histogram_property);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 3984cfa00cbf..d1b9fae5592d 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -1371,5 +1371,6 @@ static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev,
 
 int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc,
 					    unsigned int supported_filters);
+int drm_crtc_create_histogram_property(struct drm_crtc *crtc);
 
 #endif /* __DRM_CRTC_H__ */
-- 
2.25.1