Documentation/userspace-api/media/cec/cec-ioc-adap-g-conn-info.rst

   1 .. SPDX-License-Identifier: GPL-2.0
   2 ..
   3 .. Copyright 2019 Google LLC
   4 ..
   5 .. _CEC_ADAP_G_CONNECTOR_INFO:
   6
   7 *******************************
   8 ioctl CEC_ADAP_G_CONNECTOR_INFO
   9 *******************************
  10
  11 Name
  12 ====
  13
  14 CEC_ADAP_G_CONNECTOR_INFO - Query HDMI connector information
  15
  16 Synopsis
  17 ========
  18
  19 .. c:function:: int ioctl( int fd, CEC_ADAP_G_CONNECTOR_INFO, struct cec_connector_info *argp )
  20     :name: CEC_ADAP_G_CONNECTOR_INFO
  21
  22 Arguments
  23 =========
  24
  25 ``fd``
  26     File descriptor returned by :c:func:`open() <cec-open>`.
  27
  28 ``argp``
  29
  30
  31 Description
  32 ===========
  33
  34 Using this ioctl an application can learn which HDMI connector this CEC
  35 device corresponds to. While calling this ioctl the application should
  36 provide a pointer to a cec_connector_info struct which will be populated
  37 by the kernel with the info provided by the adapter's driver. This ioctl
  38 is only available if the ``CEC_CAP_CONNECTOR_INFO`` capability is set.
  39
  40 .. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}|
  41
  42 .. c:type:: cec_connector_info
  43
  44 .. flat-table:: struct cec_connector_info
  45     :header-rows:  0
  46     :stub-columns: 0
  47     :widths:       1 1 8
  48
  49     * - __u32
  50       - ``type``
  51       - The type of connector this adapter is associated with.
  52     * - union {
  53       - ``(anonymous)``
  54     * - ``struct cec_drm_connector_info``
  55       - drm
  56       - :ref:`cec-drm-connector-info`
  57     * - }
  58       -
  59
  60
  61 .. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
  62
  63 .. _connector-type:
  64
  65 .. flat-table:: Connector types
  66     :header-rows:  0
  67     :stub-columns: 0
  68     :widths:       3 1 8
  69
  70     * .. _`CEC-CONNECTOR-TYPE-NO-CONNECTOR`:
  71
  72       - ``CEC_CONNECTOR_TYPE_NO_CONNECTOR``
  73       - 0
  74       - No connector is associated with the adapter/the information is not
  75         provided by the driver.
  76     * .. _`CEC-CONNECTOR-TYPE-DRM`:
  77
  78       - ``CEC_CONNECTOR_TYPE_DRM``
  79       - 1
  80       - Indicates that a DRM connector is associated with this adapter.
  81         Information about the connector can be found in
  82         :ref:`cec-drm-connector-info`.
  83
  84 .. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
  85
  86 .. c:type:: cec_drm_connector_info
  87
  88 .. _cec-drm-connector-info:
  89
  90 .. flat-table:: struct cec_drm_connector_info
  91     :header-rows:  0
  92     :stub-columns: 0
  93     :widths:       3 1 8
  94
  95     * .. _`CEC-DRM-CONNECTOR-TYPE-CARD-NO`:
  96
  97       - __u32
  98       - ``card_no``
  99       - DRM card number: the number from a card's path, e.g. 0 in case of
 100         /dev/card0.
 101     * .. _`CEC-DRM-CONNECTOR-TYPE-CONNECTOR_ID`:
 102
 103       - __u32
 104       - ``connector_id``
 105       - DRM connector ID.