1 .. -*- coding: utf-8; mode: rst -*-
3 .. _CEC_ADAP_LOG_ADDRS:
4 .. _CEC_ADAP_G_LOG_ADDRS:
5 .. _CEC_ADAP_S_LOG_ADDRS:
7 ****************************************************
8 ioctls CEC_ADAP_G_LOG_ADDRS and CEC_ADAP_S_LOG_ADDRS
9 ****************************************************
14 CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS - Get or set the logical addresses
20 .. cpp:function:: int ioctl( int fd, int request, struct cec_log_addrs *argp )
27 File descriptor returned by :ref:`open() <cec-func-open>`.
30 CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS
38 .. note:: This documents the proposed CEC API. This API is not yet finalized
39 and is currently only available as a staging kernel module.
41 To query the current CEC logical addresses, applications call
42 :ref:`ioctl CEC_ADAP_G_LOG_ADDRS <CEC_ADAP_G_LOG_ADDRS>` with a pointer to a
43 :c:type:`struct cec_log_addrs` where the driver stores the logical addresses.
45 To set new logical addresses, applications fill in
46 :c:type:`struct cec_log_addrs` and call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
47 with a pointer to this struct. The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
48 is only available if ``CEC_CAP_LOG_ADDRS`` is set (the ``ENOTTY`` error code is
49 returned otherwise). The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
50 can only be called by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not
51 the ``EBUSY`` error code will be returned.
53 To clear existing logical addresses set ``num_log_addrs`` to 0. All other fields
54 will be ignored in that case. The adapter will go to the unconfigured state.
56 If the physical address is valid (see :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`),
57 then this ioctl will block until all requested logical
58 addresses have been claimed. If the file descriptor is in non-blocking mode then it will
59 not wait for the logical addresses to be claimed, instead it just returns 0.
61 A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the
62 logical addresses are claimed or cleared.
64 Attempting to call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` when
65 logical address types are already defined will return with error ``EBUSY``.
70 .. flat-table:: struct cec_log_addrs
80 - ``log_addr[CEC_MAX_LOG_ADDRS]``
82 - The actual logical addresses that were claimed. This is set by the
83 driver. If no logical address could be claimed, then it is set to
84 ``CEC_LOG_ADDR_INVALID``. If this adapter is Unregistered, then
85 ``log_addr[0]`` is set to 0xf and all others to
86 ``CEC_LOG_ADDR_INVALID``.
94 - The bitmask of all logical addresses this adapter has claimed. If
95 this adapter is Unregistered then ``log_addr_mask`` sets bit 15
96 and clears all other bits. If this adapter is not configured at
97 all, then ``log_addr_mask`` is set to 0. Set by the driver.
105 - The CEC version that this adapter shall use. See
106 :ref:`cec-versions`. Used to implement the
107 ``CEC_MSG_CEC_VERSION`` and ``CEC_MSG_REPORT_FEATURES`` messages.
108 Note that :ref:`CEC_OP_CEC_VERSION_1_3A <CEC-OP-CEC-VERSION-1-3A>` is not allowed by the CEC
117 - Number of logical addresses to set up. Must be ≤
118 ``available_log_addrs`` as returned by
119 :ref:`CEC_ADAP_G_CAPS`. All arrays in
120 this structure are only filled up to index
121 ``available_log_addrs``-1. The remaining array elements will be
122 ignored. Note that the CEC 2.0 standard allows for a maximum of 2
123 logical addresses, although some hardware has support for more.
124 ``CEC_MAX_LOG_ADDRS`` is 4. The driver will return the actual
125 number of logical addresses it could claim, which may be less than
126 what was requested. If this field is set to 0, then the CEC
127 adapter shall clear all claimed logical addresses and all other
128 fields will be ignored.
136 - The vendor ID is a 24-bit number that identifies the specific
137 vendor or entity. Based on this ID vendor specific commands may be
138 defined. If you do not want a vendor ID then set it to
139 ``CEC_VENDOR_ID_NONE``.
147 - Flags. No flags are defined yet, so set this to 0.
155 - The On-Screen Display name as is returned by the
156 ``CEC_MSG_SET_OSD_NAME`` message.
162 - ``primary_device_type[CEC_MAX_LOG_ADDRS]``
164 - Primary device type for each logical address. See
165 :ref:`cec-prim-dev-types` for possible types.
171 - ``log_addr_type[CEC_MAX_LOG_ADDRS]``
173 - Logical address types. See :ref:`cec-log-addr-types` for
174 possible types. The driver will update this with the actual
175 logical address type that it claimed (e.g. it may have to fallback
176 to :ref:`CEC_LOG_ADDR_TYPE_UNREGISTERED <CEC-LOG-ADDR-TYPE-UNREGISTERED>`).
182 - ``all_device_types[CEC_MAX_LOG_ADDRS]``
184 - CEC 2.0 specific: the bit mask of all device types. See
185 :ref:`cec-all-dev-types-flags`. It is used in the CEC 2.0
186 ``CEC_MSG_REPORT_FEATURES`` message. For CEC 1.4 you can either leave
187 this field to 0, or fill it in according to the CEC 2.0 guidelines to
188 give the CEC framework more information about the device type, even
189 though the framework won't use it directly in the CEC message.
195 - ``features[CEC_MAX_LOG_ADDRS][12]``
197 - Features for each logical address. It is used in the CEC 2.0
198 ``CEC_MSG_REPORT_FEATURES`` message. The 12 bytes include both the
199 RC Profile and the Device Features. For CEC 1.4 you can either leave
200 this field to all 0, or fill it in according to the CEC 2.0 guidelines to
201 give the CEC framework more information about the device type, even
202 though the framework won't use it directly in the CEC message.
206 .. flat-table:: CEC Versions
212 - .. _`CEC-OP-CEC-VERSION-1-3A`:
214 - ``CEC_OP_CEC_VERSION_1_3A``
218 - CEC version according to the HDMI 1.3a standard.
220 - .. _`CEC-OP-CEC-VERSION-1-4B`:
222 - ``CEC_OP_CEC_VERSION_1_4B``
226 - CEC version according to the HDMI 1.4b standard.
228 - .. _`CEC-OP-CEC-VERSION-2-0`:
230 - ``CEC_OP_CEC_VERSION_2_0``
234 - CEC version according to the HDMI 2.0 standard.
238 .. _cec-prim-dev-types:
240 .. flat-table:: CEC Primary Device Types
246 - .. _`CEC-OP-PRIM-DEVTYPE-TV`:
248 - ``CEC_OP_PRIM_DEVTYPE_TV``
254 - .. _`CEC-OP-PRIM-DEVTYPE-RECORD`:
256 - ``CEC_OP_PRIM_DEVTYPE_RECORD``
260 - Use for a recording device.
262 - .. _`CEC-OP-PRIM-DEVTYPE-TUNER`:
264 - ``CEC_OP_PRIM_DEVTYPE_TUNER``
268 - Use for a device with a tuner.
270 - .. _`CEC-OP-PRIM-DEVTYPE-PLAYBACK`:
272 - ``CEC_OP_PRIM_DEVTYPE_PLAYBACK``
276 - Use for a playback device.
278 - .. _`CEC-OP-PRIM-DEVTYPE-AUDIOSYSTEM`:
280 - ``CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM``
284 - Use for an audio system (e.g. an audio/video receiver).
286 - .. _`CEC-OP-PRIM-DEVTYPE-SWITCH`:
288 - ``CEC_OP_PRIM_DEVTYPE_SWITCH``
292 - Use for a CEC switch.
294 - .. _`CEC-OP-PRIM-DEVTYPE-VIDEOPROC`:
296 - ``CEC_OP_PRIM_DEVTYPE_VIDEOPROC``
300 - Use for a video processor device.
304 .. _cec-log-addr-types:
306 .. flat-table:: CEC Logical Address Types
312 - .. _`CEC-LOG-ADDR-TYPE-TV`:
314 - ``CEC_LOG_ADDR_TYPE_TV``
320 - .. _`CEC-LOG-ADDR-TYPE-RECORD`:
322 - ``CEC_LOG_ADDR_TYPE_RECORD``
326 - Use for a recording device.
328 - .. _`CEC-LOG-ADDR-TYPE-TUNER`:
330 - ``CEC_LOG_ADDR_TYPE_TUNER``
334 - Use for a tuner device.
336 - .. _`CEC-LOG-ADDR-TYPE-PLAYBACK`:
338 - ``CEC_LOG_ADDR_TYPE_PLAYBACK``
342 - Use for a playback device.
344 - .. _`CEC-LOG-ADDR-TYPE-AUDIOSYSTEM`:
346 - ``CEC_LOG_ADDR_TYPE_AUDIOSYSTEM``
350 - Use for an audio system device.
352 - .. _`CEC-LOG-ADDR-TYPE-SPECIFIC`:
354 - ``CEC_LOG_ADDR_TYPE_SPECIFIC``
358 - Use for a second TV or for a video processor device.
360 - .. _`CEC-LOG-ADDR-TYPE-UNREGISTERED`:
362 - ``CEC_LOG_ADDR_TYPE_UNREGISTERED``
366 - Use this if you just want to remain unregistered. Used for pure
367 CEC switches or CDC-only devices (CDC: Capability Discovery and
372 .. _cec-all-dev-types-flags:
374 .. flat-table:: CEC All Device Types Flags
380 - .. _`CEC-OP-ALL-DEVTYPE-TV`:
382 - ``CEC_OP_ALL_DEVTYPE_TV``
386 - This supports the TV type.
388 - .. _`CEC-OP-ALL-DEVTYPE-RECORD`:
390 - ``CEC_OP_ALL_DEVTYPE_RECORD``
394 - This supports the Recording type.
396 - .. _`CEC-OP-ALL-DEVTYPE-TUNER`:
398 - ``CEC_OP_ALL_DEVTYPE_TUNER``
402 - This supports the Tuner type.
404 - .. _`CEC-OP-ALL-DEVTYPE-PLAYBACK`:
406 - ``CEC_OP_ALL_DEVTYPE_PLAYBACK``
410 - This supports the Playback type.
412 - .. _`CEC-OP-ALL-DEVTYPE-AUDIOSYSTEM`:
414 - ``CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM``
418 - This supports the Audio System type.
420 - .. _`CEC-OP-ALL-DEVTYPE-SWITCH`:
422 - ``CEC_OP_ALL_DEVTYPE_SWITCH``
426 - This supports the CEC Switch or Video Processing type.
433 On success 0 is returned, on error -1 and the ``errno`` variable is set
434 appropriately. The generic error codes are described at the
435 :ref:`Generic Error Codes <gen-errors>` chapter.