C++ (Cpp) drm_property_change_valid_get示例

示例#1

文件： drm_mode_object.c 项目： JamesChenFromChina/linux

static int set_property_legacy(struct drm_mode_object *obj,
			       struct drm_property *prop,
			       uint64_t prop_value)
{
	struct drm_device *dev = prop->dev;
	struct drm_mode_object *ref;
	int ret = -EINVAL;

	if (!drm_property_change_valid_get(prop, prop_value, &ref))
		return -EINVAL;

	drm_modeset_lock_all(dev);
	switch (obj->type) {
	case DRM_MODE_OBJECT_CONNECTOR:
		ret = drm_mode_connector_set_obj_prop(obj, prop,
						      prop_value);
		break;
	case DRM_MODE_OBJECT_CRTC:
		ret = drm_mode_crtc_set_obj_prop(obj, prop, prop_value);
		break;
	case DRM_MODE_OBJECT_PLANE:
		ret = drm_mode_plane_set_obj_prop(obj_to_plane(obj),
						  prop, prop_value);
		break;
	}
	drm_property_change_valid_put(prop, ref);
	drm_modeset_unlock_all(dev);

	return ret;
}

示例#2

文件： drm_mode_object.c 项目： acton393/linux

int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
				    struct drm_file *file_priv)
{
	struct drm_mode_obj_set_property *arg = data;
	struct drm_mode_object *arg_obj;
	struct drm_property *property;
	int ret = -EINVAL;
	struct drm_mode_object *ref;

	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		return -EINVAL;

	drm_modeset_lock_all(dev);

	arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
	if (!arg_obj) {
		ret = -ENOENT;
		goto out;
	}

	if (!arg_obj->properties)
		goto out_unref;

	property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
	if (!property)
		goto out_unref;

	if (!drm_property_change_valid_get(property, arg->value, &ref))
		goto out_unref;

	switch (arg_obj->type) {
	case DRM_MODE_OBJECT_CONNECTOR:
		ret = drm_mode_connector_set_obj_prop(arg_obj, property,
						      arg->value);
		break;
	case DRM_MODE_OBJECT_CRTC:
		ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
		break;
	case DRM_MODE_OBJECT_PLANE:
		ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
						  property, arg->value);
		break;
	}

	drm_property_change_valid_put(property, ref);

out_unref:
	drm_mode_object_unreference(arg_obj);
out:
	drm_modeset_unlock_all(dev);
	return ret;
}