[PATCH 5/6] drm/tile: expose the tile property to userspace

[Dave Airlie <airlied@gmail.com>]

From: Dave Airlie <airlied@redhat.com>

This takes the tiling info from the connector and
exposes it to userspace, as a blob object in a
connector property.

The contents of the blob is ABI.

Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 drivers/gpu/drm/drm_crtc.c          | 36 ++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_dp_mst.c |  2 ++
 include/drm/drm_crtc.h              |  4 ++++
 3 files changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 93135d4..81e867a 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1319,6 +1319,11 @@ static int drm_mode_create_standard_connector_properties(struct drm_device *dev)
 				       "PATH", 0);
 	dev->mode_config.path_property = dev_path;
 
+	dev->mode_config.tile_property = drm_property_create(dev,
+							     DRM_MODE_PROP_BLOB |
+							     DRM_MODE_PROP_IMMUTABLE,
+							     "TILE", 0);
+
 	return 0;
 }
 
@@ -4004,6 +4009,37 @@ int drm_mode_connector_set_path_property(struct drm_connector *connector,
 }
 EXPORT_SYMBOL(drm_mode_connector_set_path_property);
 
+int drm_mode_connector_set_tile_property(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	int ret, size;
+	char tile[256];
+
+	if (connector->tile_blob_ptr)
+		drm_property_destroy_blob(dev, connector->tile_blob_ptr);
+
+	if (!connector->has_tile) {
+		connector->tile_blob_ptr = NULL;
+		ret = drm_object_property_set_value(&connector->base,
+						    dev->mode_config.tile_property, 0);
+		return ret;
+	}
+
+	snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d", connector->tile_group->id, connector->tile_is_single_monitor, connector->num_h_tile, connector->num_v_tile, connector->tile_h_loc, connector->tile_v_loc, connector->tile_h_size, connector->tile_v_size);
+	size = strlen(tile) + 1;
+
+	connector->tile_blob_ptr = drm_property_create_blob(connector->dev,
+							    size, tile);
+	if (!connector->tile_blob_ptr)
+		return -EINVAL;
+
+	ret = drm_object_property_set_value(&connector->base,
+					    dev->mode_config.tile_property,
+					    connector->tile_blob_ptr->base.id);
+	return ret;
+}
+EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
+
 /**
  * drm_mode_connector_update_edid_property - update the edid property of a connector
  * @connector: drm connector
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index c66e73a..c5529ff 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -422,6 +422,8 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
 	intel_dp_add_properties(intel_dp, connector);
 
 	drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
+	drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
+
 	drm_mode_connector_set_path_property(connector, pathprop);
 	drm_reinit_primary_mode_group(dev);
 	mutex_lock(&dev->mode_config.mutex);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index d71b6d7..39d744b 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -548,6 +548,8 @@ struct drm_connector {
 
 	struct drm_property_blob *path_blob_ptr;
 
+	struct drm_property_blob *tile_blob_ptr;
+
 	uint8_t polled; /* DRM_CONNECTOR_POLL_* */
 
 	/* requested DPMS state */
@@ -838,6 +840,7 @@ struct drm_mode_config {
 	struct drm_property *edid_property;
 	struct drm_property *dpms_property;
 	struct drm_property *path_property;
+	struct drm_property *tile_property;
 	struct drm_property *plane_type_property;
 
 	/* DVI-I properties */
@@ -990,6 +993,7 @@ extern void drm_mode_config_cleanup(struct drm_device *dev);
 
 extern int drm_mode_connector_set_path_property(struct drm_connector *connector,
 						char *path);
+int drm_mode_connector_set_tile_property(struct drm_connector *connector);
 extern int drm_mode_connector_update_edid_property(struct drm_connector *connector,
 						struct edid *edid);
 
-- 
2.1.0