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+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CEC_ADAP_G_CAPS:
+
+*********************
+ioctl CEC_ADAP_G_CAPS
+*********************
+
+Name
+====
+
+CEC_ADAP_G_CAPS - Query device capabilities
+
+Synopsis
+========
+
+.. cpp:function:: int ioctl( int fd, int request, struct cec_caps *argp )
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :ref:`open() <cec-func-open>`.
+
+``request``
+    CEC_ADAP_G_CAPS
+
+``argp``
+
+
+Description
+===========
+
+.. note:: This documents the proposed CEC API. This API is not yet finalized
+   and is currently only available as a staging kernel module.
+
+All cec devices must support :ref:`ioctl CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`. To query
+device information, applications call the ioctl with a pointer to a
+struct :ref:`cec_caps <cec-caps>`. The driver fills the structure and
+returns the information to the application. The ioctl never fails.
+
+
+.. _cec-caps:
+
+.. flat-table:: struct cec_caps
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+
+    -  .. row 1
+
+       -  char
+
+       -  ``driver[32]``
+
+       -  The name of the cec adapter driver.
+
+    -  .. row 2
+
+       -  char
+
+       -  ``name[32]``
+
+       -  The name of this CEC adapter. The combination ``driver`` and
+	  ``name`` must be unique.
+
+    -  .. row 3
+
+       -  __u32
+
+       -  ``capabilities``
+
+       -  The capabilities of the CEC adapter, see
+	  :ref:`cec-capabilities`.
+
+    -  .. row 4
+
+       -  __u32
+
+       -  ``version``
+
+       -  CEC Framework API version, formatted with the ``KERNEL_VERSION()``
+	  macro.
+
+
+
+.. _cec-capabilities:
+
+.. flat-table:: CEC Capabilities Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 8
+
+
+    -  .. _`CEC-CAP-PHYS-ADDR`:
+
+       -  ``CEC_CAP_PHYS_ADDR``
+
+       -  0x00000001
+
+       -  Userspace has to configure the physical address by calling
+	  :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`. If
+	  this capability isn't set, then setting the physical address is
+	  handled by the kernel whenever the EDID is set (for an HDMI
+	  receiver) or read (for an HDMI transmitter).
+
+    -  .. _`CEC-CAP-LOG-ADDRS`:
+
+       -  ``CEC_CAP_LOG_ADDRS``
+
+       -  0x00000002
+
+       -  Userspace has to configure the logical addresses by calling
+	  :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`. If
+	  this capability isn't set, then the kernel will have configured
+	  this.
+
+    -  .. _`CEC-CAP-TRANSMIT`:
+
+       -  ``CEC_CAP_TRANSMIT``
+
+       -  0x00000004
+
+       -  Userspace can transmit CEC messages by calling
+	  :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. This implies that
+	  userspace can be a follower as well, since being able to transmit
+	  messages is a prerequisite of becoming a follower. If this
+	  capability isn't set, then the kernel will handle all CEC
+	  transmits and process all CEC messages it receives.
+
+    -  .. _`CEC-CAP-PASSTHROUGH`:
+
+       -  ``CEC_CAP_PASSTHROUGH``
+
+       -  0x00000008
+
+       -  Userspace can use the passthrough mode by calling
+	  :ref:`ioctl CEC_S_MODE <CEC_S_MODE>`.
+
+    -  .. _`CEC-CAP-RC`:
+
+       -  ``CEC_CAP_RC``
+
+       -  0x00000010
+
+       -  This adapter supports the remote control protocol.
+
+    -  .. _`CEC-CAP-MONITOR-ALL`:
+
+       -  ``CEC_CAP_MONITOR_ALL``
+
+       -  0x00000020
+
+       -  The CEC hardware can monitor all messages, not just directed and
+	  broadcast messages.
+
+
+
+Return Value
+============
+
+On success 0 is returned, on error -1 and the ``errno`` variable is set
+appropriately. The generic error codes are described at the
+:ref:`Generic Error Codes <gen-errors>` chapter.