Document the new CEC_ADAP_G_CONNECTOR_INFO ioctl.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
---
Documentation/media/uapi/cec/cec-funcs.rst | 1 +
.../uapi/cec/cec-ioc-adap-g-conn-info.rst | 109 ++++++++++++++++++
2 files changed, 110 insertions(+)
create mode 100644 Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst
diff --git a/Documentation/media/uapi/cec/cec-funcs.rst b/Documentation/media/uapi/cec/cec-funcs.rst
index 620590b168c9..dc6da9c639a8 100644
--- a/Documentation/media/uapi/cec/cec-funcs.rst
+++ b/Documentation/media/uapi/cec/cec-funcs.rst
@@ -24,6 +24,7 @@ Function Reference
cec-ioc-adap-g-caps
cec-ioc-adap-g-log-addrs
cec-ioc-adap-g-phys-addr
+ cec-ioc-adap-g-conn-info
cec-ioc-dqevent
cec-ioc-g-mode
cec-ioc-receive
diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst
new file mode 100644
index 000000000000..87f475d7dfed
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst
@@ -0,0 +1,109 @@
+.. SPDX-License-Identifier: GPL-2.0
+..
+.. Copyright 2019 Google LLC
+..
+.. This documentation is free software; you can redistribute it and/or
+.. modify it under the terms of the GNU General Public License
+.. version 2 as published by the Free Software Foundation.
+..
+.. This documentation is distributed in the hope that it will be useful,
+.. but WITHOUT ANY WARRANTY; without even the implied warranty of
+.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+.. GNU General Public License for more details.
+..
+.. _CEC_ADAP_G_CONNECTOR_INFO:
+
+*******************************
+ioctl CEC_ADAP_G_CONNECTOR_INFO
+*******************************
+
+Name
+====
+
+CEC_ADAP_G_CONNECTOR_INFO - Query HDMI connector information
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_ADAP_G_CONNECTOR_INFO, struct cec_connector_info *argp )
+ :name: CEC_ADAP_G_CONNECTOR_INFO
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+
+
+Description
+===========
+
+Using this ioctl an application can learn which HDMI connector this CEC
+device corresponds to. While calling this ioctl the application should
+provide pointer to a cec_connector_info struct which will be populated
+by the kernel with the info provided by the adapter's driver. Not all
+drivers supply this information.
+
+.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}|
+
+.. c:type:: cec_connector_info
+
+.. flat-table:: struct cec_connector_info
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 1 8
+
+ * - __u32
+ - ``type``
+ - The type of connector this adapter is associated with.
+ * - union
+ - ``(anonymous)``
+ -
+ * -
+ - ``struct cec_drm_connector_info``
+ - drm
+ - :ref:`cec-drm-connector-info`.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. _connector-type:
+
+.. flat-table:: Connector types
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 3 1 8
+
+ * .. _`CEC-CONNECTOR-TYPE-NO-CONNECTOR`:
+
+ - ``CEC_CONNECTOR_TYPE_NO_CONNECTOR``
+ - 0
+ - No connector is associated with the adapter/the information is not provided by the driver.
+ * .. _`CEC-CONNECTOR-TYPE-DRM`:
+
+ - ``CEC_CONNECTOR_TYPE_DRM``
+ - 1
+ - Indicates that a DRM connector is associated with this adapter. Info about the
+ connector can be found in :ref:`cec-drm-connector-info`.
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. c:type:: cec_drm_connector_info
+
+.. _cec-drm-connector-info:
+
+.. flat-table:: struct cec_drm_connector_info
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 3 1 8
+
+ * .. _`CEC-DRM-CONNECTOR-TYPE-CARD-NO`:
+
+ - __u32
+ - ``card_no``
+ - DRM card number - the digit from a card's path, e.g. 0 in case of /dev/card0.
+ * .. _`CEC-DRM-CONNECTOR-TYPE-CONNECTOR_ID`:
+
+ - __u32
--
2.20.1
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