[RFC 7/9] drm: Implement HDR source metadata set and get property handling

[Uma Shankar <uma.shankar@xxxxxxxxx>]

HDR source metadata set and get property implemented in this
patch. The blob data is received from userspace and saved in
connector state, the same is returned as blob in get property
call to userspace.

Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
 drivers/gpu/drm/drm_atomic.c        |   15 +++++++++++++++
 drivers/gpu/drm/drm_atomic_helper.c |    6 ++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index e163701..c0007c1 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1140,6 +1140,8 @@ int drm_atomic_connector_set_property(struct drm_connector *connector,
 {
 	struct drm_device *dev = connector->dev;
 	struct drm_mode_config *config = &dev->mode_config;
+	bool replaced = false;
+	int ret;
 
 	if (property == config->prop_crtc_id) {
 		struct drm_crtc *crtc = drm_crtc_find(dev, val);
@@ -1188,6 +1190,14 @@ int drm_atomic_connector_set_property(struct drm_connector *connector,
 		 */
 		if (state->link_status != DRM_LINK_STATUS_GOOD)
 			state->link_status = val;
+		} else if (property == config->hdr_source_metadata_property) {
+			ret = drm_atomic_replace_property_blob_from_id(dev,
+					&state->hdr_source_metadata_blob_ptr,
+					val,
+					-1,
+					&replaced);
+			state->hdr_metadata_changed |= replaced;
+			return ret;
 	} else if (property == config->aspect_ratio_property) {
 		state->picture_aspect_ratio = val;
 	} else if (property == connector->scaling_mode_property) {
@@ -1210,6 +1220,8 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
 
 	drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
 	drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
+	drm_printf(p, "\thdr_metadata_changed=%d\n",
+					state->hdr_metadata_changed);
 
 	if (connector->funcs->atomic_print_state)
 		connector->funcs->atomic_print_state(p, state);
@@ -1272,6 +1284,9 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
 		*val = state->picture_aspect_ratio;
 	} else if (property == connector->scaling_mode_property) {
 		*val = state->scaling_mode;
+	} else if (property == config->hdr_source_metadata_property) {
+		*val = (state->hdr_source_metadata_blob_ptr) ?
+			state->hdr_source_metadata_blob_ptr->base.id : 0;
 	} else if (connector->funcs->atomic_get_property) {
 		return connector->funcs->atomic_get_property(connector,
 				state, property, val);
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 93b0221..1406441 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -3436,6 +3436,10 @@ void drm_atomic_helper_connector_reset(struct drm_connector *connector)
 	memcpy(state, connector->state, sizeof(*state));
 	if (state->crtc)
 		drm_connector_get(connector);
+	if (state->hdr_source_metadata_blob_ptr)
+		drm_property_blob_get(state->hdr_source_metadata_blob_ptr);
+
+	state->hdr_metadata_changed = false;
 }
 EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state);
 
@@ -3562,6 +3566,8 @@ struct drm_atomic_state *
 {
 	if (state->crtc)
 		drm_connector_put(state->connector);
+	if (state->hdr_source_metadata_blob_ptr)
+		drm_property_blob_put(state->hdr_source_metadata_blob_ptr);
 }
 EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state);
 
-- 
1.7.9.5

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