tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1.. SPDX-License-Identifier: GPL-2.0
2..
3.. Copyright 2019 Google LLC
4..
5.. c:namespace:: CEC
6
7.. _CEC_ADAP_G_CONNECTOR_INFO:
8
9*******************************
10ioctl CEC_ADAP_G_CONNECTOR_INFO
11*******************************
12
13Name
14====
15
16CEC_ADAP_G_CONNECTOR_INFO - Query HDMI connector information
17
18Synopsis
19========
20
21.. c:macro:: CEC_ADAP_G_CONNECTOR_INFO
22
23``int ioctl(int fd, CEC_ADAP_G_CONNECTOR_INFO, struct cec_connector_info *argp)``
24
25Arguments
26=========
27
28``fd``
29 File descriptor returned by :c:func:`open()`.
30
31``argp``
32
33Description
34===========
35
36Using this ioctl an application can learn which HDMI connector this CEC
37device corresponds to. While calling this ioctl the application should
38provide a pointer to a cec_connector_info struct which will be populated
39by the kernel with the info provided by the adapter's driver. This ioctl
40is only available if the ``CEC_CAP_CONNECTOR_INFO`` capability is set.
41
42.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.2cm}|
43
44.. c:type:: cec_connector_info
45
46.. flat-table:: struct cec_connector_info
47 :header-rows: 0
48 :stub-columns: 0
49 :widths: 1 1 8
50
51 * - __u32
52 - ``type``
53 - The type of connector this adapter is associated with.
54 * - union {
55 - ``(anonymous)``
56 * - ``struct cec_drm_connector_info``
57 - drm
58 - :ref:`cec-drm-connector-info`
59 * - }
60 -
61
62.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.4cm}|
63
64.. _connector-type:
65
66.. flat-table:: Connector types
67 :header-rows: 0
68 :stub-columns: 0
69 :widths: 3 1 8
70
71 * .. _`CEC-CONNECTOR-TYPE-NO-CONNECTOR`:
72
73 - ``CEC_CONNECTOR_TYPE_NO_CONNECTOR``
74 - 0
75 - No connector is associated with the adapter/the information is not
76 provided by the driver.
77 * .. _`CEC-CONNECTOR-TYPE-DRM`:
78
79 - ``CEC_CONNECTOR_TYPE_DRM``
80 - 1
81 - Indicates that a DRM connector is associated with this adapter.
82 Information about the connector can be found in
83 :ref:`cec-drm-connector-info`.
84
85.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.4cm}|
86
87.. c:type:: cec_drm_connector_info
88
89.. _cec-drm-connector-info:
90
91.. flat-table:: struct cec_drm_connector_info
92 :header-rows: 0
93 :stub-columns: 0
94 :widths: 3 1 8
95
96 * .. _`CEC-DRM-CONNECTOR-TYPE-CARD-NO`:
97
98 - __u32
99 - ``card_no``
100 - DRM card number: the number from a card's path, e.g. 0 in case of
101 /dev/card0.
102 * .. _`CEC-DRM-CONNECTOR-TYPE-CONNECTOR_ID`:
103
104 - __u32
105 - ``connector_id``
106 - DRM connector ID.