From 0dcc2992b7f03fbe5bf9bd9f65edaf5479bf975a Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Mon, 4 Sep 2017 22:34:19 +0200
Subject: [PATCH] BACKPORT: HDMI CEC support from v4.15

Skipped changes:
857313e51006ff51524579bcd8808b70f9a80812 "media: utilize new cdev_device_add helper function"
0f7499fddb153a333dff3c1dc4280c178b9b5a80 "[media] rc-main: assign driver type during allocation"
---
 Documentation/devicetree/bindings/media/cec.txt    |   8 +
 Documentation/media/kapi/cec-core.rst              | 381 +++++++++++++++++++++
 Documentation/media/uapi/cec/cec-api.rst           |  46 +++
 Documentation/media/uapi/cec/cec-func-close.rst    |  47 +++
 Documentation/media/uapi/cec/cec-func-ioctl.rst    |  66 ++++
 Documentation/media/uapi/cec/cec-func-open.rst     |  78 +++++
 Documentation/media/uapi/cec/cec-func-poll.rst     |  77 +++++
 Documentation/media/uapi/cec/cec-funcs.rst         |  20 ++
 Documentation/media/uapi/cec/cec-header.rst        |  10 +
 Documentation/media/uapi/cec/cec-intro.rst         |  40 +++
 .../media/uapi/cec/cec-ioc-adap-g-caps.rst         | 139 ++++++++
 .../media/uapi/cec/cec-ioc-adap-g-log-addrs.rst    | 371 ++++++++++++++++++++
 .../media/uapi/cec/cec-ioc-adap-g-phys-addr.rst    |  93 +++++
 Documentation/media/uapi/cec/cec-ioc-dqevent.rst   | 226 ++++++++++++
 Documentation/media/uapi/cec/cec-ioc-g-mode.rst    | 293 ++++++++++++++++
 Documentation/media/uapi/cec/cec-ioc-receive.rst   | 344 +++++++++++++++++++
 MAINTAINERS                                        |  16 +
 drivers/media/cec/cec-adap.c                       |  61 +++-
 drivers/media/cec/cec-core.c                       |  15 +-
 drivers/media/rc/keymaps/Makefile                  |   1 +
 drivers/media/rc/keymaps/rc-cec.c                  | 182 ++++++++++
 drivers/media/rc/rc-main.c                         |   1 +
 fs/compat_ioctl.c                                  |  12 +
 include/media/cec-notifier.h                       |  22 ++
 include/media/cec.h                                |  32 +-
 include/media/rc-map.h                             |   5 +-
 include/uapi/linux/cec-funcs.h                     |   1 +
 include/uapi/linux/cec.h                           |   2 +-
 include/uapi/linux/input-event-codes.h             |  31 ++
 include/uapi/linux/input.h                         |   1 +
 30 files changed, 2606 insertions(+), 15 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/cec.txt
 create mode 100644 Documentation/media/kapi/cec-core.rst
 create mode 100644 Documentation/media/uapi/cec/cec-api.rst
 create mode 100644 Documentation/media/uapi/cec/cec-func-close.rst
 create mode 100644 Documentation/media/uapi/cec/cec-func-ioctl.rst
 create mode 100644 Documentation/media/uapi/cec/cec-func-open.rst
 create mode 100644 Documentation/media/uapi/cec/cec-func-poll.rst
 create mode 100644 Documentation/media/uapi/cec/cec-funcs.rst
 create mode 100644 Documentation/media/uapi/cec/cec-header.rst
 create mode 100644 Documentation/media/uapi/cec/cec-intro.rst
 create mode 100644 Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst
 create mode 100644 Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst
 create mode 100644 Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst
 create mode 100644 Documentation/media/uapi/cec/cec-ioc-dqevent.rst
 create mode 100644 Documentation/media/uapi/cec/cec-ioc-g-mode.rst
 create mode 100644 Documentation/media/uapi/cec/cec-ioc-receive.rst
 create mode 100644 drivers/media/rc/keymaps/rc-cec.c

diff --git a/Documentation/devicetree/bindings/media/cec.txt b/Documentation/devicetree/bindings/media/cec.txt
new file mode 100644
index 000000000000..22d7aae3d3d7
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/cec.txt
@@ -0,0 +1,8 @@
+Common bindings for HDMI CEC adapters
+
+- hdmi-phandle: phandle to the HDMI controller.
+
+- needs-hpd: if present the CEC support is only available when the HPD
+  is high. Some boards only let the CEC pin through if the HPD is high,
+  for example if there is a level converter that uses the HPD to power
+  up or down.
diff --git a/Documentation/media/kapi/cec-core.rst b/Documentation/media/kapi/cec-core.rst
new file mode 100644
index 000000000000..d37e107f2fde
--- /dev/null
+++ b/Documentation/media/kapi/cec-core.rst
@@ -0,0 +1,381 @@
+CEC Kernel Support
+==================
+
+The CEC framework provides a unified kernel interface for use with HDMI CEC
+hardware. It is designed to handle a multiple types of hardware (receivers,
+transmitters, USB dongles). The framework also gives the option to decide
+what to do in the kernel driver and what should be handled by userspace
+applications. In addition it integrates the remote control passthrough
+feature into the kernel's remote control framework.
+
+
+The CEC Protocol
+----------------
+
+The CEC protocol enables consumer electronic devices to communicate with each
+other through the HDMI connection. The protocol uses logical addresses in the
+communication. The logical address is strictly connected with the functionality
+provided by the device. The TV acting as the communication hub is always
+assigned address 0. The physical address is determined by the physical
+connection between devices.
+
+The CEC framework described here is up to date with the CEC 2.0 specification.
+It is documented in the HDMI 1.4 specification with the new 2.0 bits documented
+in the HDMI 2.0 specification. But for most of the features the freely available
+HDMI 1.3a specification is sufficient:
+
+http://www.microprocessor.org/HDMISpecification13a.pdf
+
+
+CEC Adapter Interface
+---------------------
+
+The struct cec_adapter represents the CEC adapter hardware. It is created by
+calling cec_allocate_adapter() and deleted by calling cec_delete_adapter():
+
+.. c:function::
+   struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops, void *priv,
+   const char *name, u32 caps, u8 available_las);
+
+.. c:function::
+   void cec_delete_adapter(struct cec_adapter *adap);
+
+To create an adapter you need to pass the following information:
+
+ops:
+	adapter operations which are called by the CEC framework and that you
+	have to implement.
+
+priv:
+	will be stored in adap->priv and can be used by the adapter ops.
+	Use cec_get_drvdata(adap) to get the priv pointer.
+
+name:
+	the name of the CEC adapter. Note: this name will be copied.
+
+caps:
+	capabilities of the CEC adapter. These capabilities determine the
+	capabilities of the hardware and which parts are to be handled
+	by userspace and which parts are handled by kernelspace. The
+	capabilities are returned by CEC_ADAP_G_CAPS.
+
+available_las:
+	the number of simultaneous logical addresses that this
+	adapter can handle. Must be 1 <= available_las <= CEC_MAX_LOG_ADDRS.
+
+To obtain the priv pointer use this helper function:
+
+.. c:function::
+	void *cec_get_drvdata(const struct cec_adapter *adap);
+
+To register the /dev/cecX device node and the remote control device (if
+CEC_CAP_RC is set) you call:
+
+.. c:function::
+	int cec_register_adapter(struct cec_adapter *adap, struct device *parent);
+
+where parent is the parent device.
+
+To unregister the devices call:
+
+.. c:function::
+	void cec_unregister_adapter(struct cec_adapter *adap);
+
+Note: if cec_register_adapter() fails, then call cec_delete_adapter() to
+clean up. But if cec_register_adapter() succeeded, then only call
+cec_unregister_adapter() to clean up, never cec_delete_adapter(). The
+unregister function will delete the adapter automatically once the last user
+of that /dev/cecX device has closed its file handle.
+
+
+Implementing the Low-Level CEC Adapter
+--------------------------------------
+
+The following low-level adapter operations have to be implemented in
+your driver:
+
+.. c:type:: struct cec_adap_ops
+
+.. code-block:: none
+
+	struct cec_adap_ops
+	{
+		/* Low-level callbacks */
+		int (*adap_enable)(struct cec_adapter *adap, bool enable);
+		int (*adap_monitor_all_enable)(struct cec_adapter *adap, bool enable);
+		int (*adap_log_addr)(struct cec_adapter *adap, u8 logical_addr);
+		int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
+				      u32 signal_free_time, struct cec_msg *msg);
+		void (*adap_status)(struct cec_adapter *adap, struct seq_file *file);
+		void (*adap_free)(struct cec_adapter *adap);
+
+		/* High-level callbacks */
+		...
+	};
+
+The five low-level ops deal with various aspects of controlling the CEC adapter
+hardware:
+
+
+To enable/disable the hardware:
+
+.. c:function::
+	int (*adap_enable)(struct cec_adapter *adap, bool enable);
+
+This callback enables or disables the CEC hardware. Enabling the CEC hardware
+means powering it up in a state where no logical addresses are claimed. This
+op assumes that the physical address (adap->phys_addr) is valid when enable is
+true and will not change while the CEC adapter remains enabled. The initial
+state of the CEC adapter after calling cec_allocate_adapter() is disabled.
+
+Note that adap_enable must return 0 if enable is false.
+
+
+To enable/disable the 'monitor all' mode:
+
+.. c:function::
+	int (*adap_monitor_all_enable)(struct cec_adapter *adap, bool enable);
+
+If enabled, then the adapter should be put in a mode to also monitor messages
+that not for us. Not all hardware supports this and this function is only
+called if the CEC_CAP_MONITOR_ALL capability is set. This callback is optional
+(some hardware may always be in 'monitor all' mode).
+
+Note that adap_monitor_all_enable must return 0 if enable is false.
+
+
+To program a new logical address:
+
+.. c:function::
+	int (*adap_log_addr)(struct cec_adapter *adap, u8 logical_addr);
+
+If logical_addr == CEC_LOG_ADDR_INVALID then all programmed logical addresses
+are to be erased. Otherwise the given logical address should be programmed.
+If the maximum number of available logical addresses is exceeded, then it
+should return -ENXIO. Once a logical address is programmed the CEC hardware
+can receive directed messages to that address.
+
+Note that adap_log_addr must return 0 if logical_addr is CEC_LOG_ADDR_INVALID.
+
+
+To transmit a new message:
+
+.. c:function::
+	int (*adap_transmit)(struct cec_adapter *adap, u8 attempts,
+			     u32 signal_free_time, struct cec_msg *msg);
+
+This transmits a new message. The attempts argument is the suggested number of
+attempts for the transmit.
+
+The signal_free_time is the number of data bit periods that the adapter should
+wait when the line is free before attempting to send a message. This value
+depends on whether this transmit is a retry, a message from a new initiator or
+a new message for the same initiator. Most hardware will handle this
+automatically, but in some cases this information is needed.
+
+The CEC_FREE_TIME_TO_USEC macro can be used to convert signal_free_time to
+microseconds (one data bit period is 2.4 ms).
+
+
+To log the current CEC hardware status:
+
+.. c:function::
+	void (*adap_status)(struct cec_adapter *adap, struct seq_file *file);
+
+This optional callback can be used to show the status of the CEC hardware.
+The status is available through debugfs: cat /sys/kernel/debug/cec/cecX/status
+
+To free any resources when the adapter is deleted:
+
+.. c:function::
+	void (*adap_free)(struct cec_adapter *adap);
+
+This optional callback can be used to free any resources that might have been
+allocated by the driver. It's called from cec_delete_adapter.
+
+
+Your adapter driver will also have to react to events (typically interrupt
+driven) by calling into the framework in the following situations:
+
+When a transmit finished (successfully or otherwise):
+
+.. c:function::
+	void cec_transmit_done(struct cec_adapter *adap, u8 status, u8 arb_lost_cnt,
+		       u8 nack_cnt, u8 low_drive_cnt, u8 error_cnt);
+
+or:
+
+.. c:function::
+	void cec_transmit_attempt_done(struct cec_adapter *adap, u8 status);
+
+The status can be one of:
+
+CEC_TX_STATUS_OK:
+	the transmit was successful.
+
+CEC_TX_STATUS_ARB_LOST:
+	arbitration was lost: another CEC initiator
+	took control of the CEC line and you lost the arbitration.
+
+CEC_TX_STATUS_NACK:
+	the message was nacked (for a directed message) or
+	acked (for a broadcast message). A retransmission is needed.
+
+CEC_TX_STATUS_LOW_DRIVE:
+	low drive was detected on the CEC bus. This indicates that
+	a follower detected an error on the bus and requested a
+	retransmission.
+
+CEC_TX_STATUS_ERROR:
+	some unspecified error occurred: this can be one of ARB_LOST
+	or LOW_DRIVE if the hardware cannot differentiate or something
+	else entirely.
+
+CEC_TX_STATUS_MAX_RETRIES:
+	could not transmit the message after trying multiple times.
+	Should only be set by the driver if it has hardware support for
+	retrying messages. If set, then the framework assumes that it
+	doesn't have to make another attempt to transmit the message
+	since the hardware did that already.
+
+The hardware must be able to differentiate between OK, NACK and 'something
+else'.
+
+The \*_cnt arguments are the number of error conditions that were seen.
+This may be 0 if no information is available. Drivers that do not support
+hardware retry can just set the counter corresponding to the transmit error
+to 1, if the hardware does support retry then either set these counters to
+0 if the hardware provides no feedback of which errors occurred and how many
+times, or fill in the correct values as reported by the hardware.
+
+The cec_transmit_attempt_done() function is a helper for cases where the
+hardware never retries, so the transmit is always for just a single
+attempt. It will call cec_transmit_done() in turn, filling in 1 for the
+count argument corresponding to the status. Or all 0 if the status was OK.
+
+When a CEC message was received:
+
+.. c:function::
+	void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg);
+
+Speaks for itself.
+
+Implementing the interrupt handler
+----------------------------------
+
+Typically the CEC hardware provides interrupts that signal when a transmit
+finished and whether it was successful or not, and it provides and interrupt
+when a CEC message was received.
+
+The CEC driver should always process the transmit interrupts first before
+handling the receive interrupt. The framework expects to see the cec_transmit_done
+call before the cec_received_msg call, otherwise it can get confused if the
+received message was in reply to the transmitted message.
+
+Implementing the High-Level CEC Adapter
+---------------------------------------
+
+The low-level operations drive the hardware, the high-level operations are
+CEC protocol driven. The following high-level callbacks are available:
+
+.. code-block:: none
+
+	struct cec_adap_ops {
+		/* Low-level callbacks */
+		...
+
+		/* High-level CEC message callback */
+		int (*received)(struct cec_adapter *adap, struct cec_msg *msg);
+	};
+
+The received() callback allows the driver to optionally handle a newly
+received CEC message
+
+.. c:function::
+	int (*received)(struct cec_adapter *adap, struct cec_msg *msg);
+
+If the driver wants to process a CEC message, then it can implement this
+callback. If it doesn't want to handle this message, then it should return
+-ENOMSG, otherwise the CEC framework assumes it processed this message and
+it will not do anything with it.
+
+
+CEC framework functions
+-----------------------
+
+CEC Adapter drivers can call the following CEC framework functions:
+
+.. c:function::
+	int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
+			     bool block);
+
+Transmit a CEC message. If block is true, then wait until the message has been
+transmitted, otherwise just queue it and return.
+
+.. c:function::
+	void cec_s_phys_addr(struct cec_adapter *adap, u16 phys_addr,
+			     bool block);
+
+Change the physical address. This function will set adap->phys_addr and
+send an event if it has changed. If cec_s_log_addrs() has been called and
+the physical address has become valid, then the CEC framework will start
+claiming the logical addresses. If block is true, then this function won't
+return until this process has finished.
+
+When the physical address is set to a valid value the CEC adapter will
+be enabled (see the adap_enable op). When it is set to CEC_PHYS_ADDR_INVALID,
+then the CEC adapter will be disabled. If you change a valid physical address
+to another valid physical address, then this function will first set the
+address to CEC_PHYS_ADDR_INVALID before enabling the new physical address.
+
+.. c:function::
+	void cec_s_phys_addr_from_edid(struct cec_adapter *adap,
+				       const struct edid *edid);
+
+A helper function that extracts the physical address from the edid struct
+and calls cec_s_phys_addr() with that address, or CEC_PHYS_ADDR_INVALID
+if the EDID did not contain a physical address or edid was a NULL pointer.
+
+.. c:function::
+	int cec_s_log_addrs(struct cec_adapter *adap,
+			    struct cec_log_addrs *log_addrs, bool block);
+
+Claim the CEC logical addresses. Should never be called if CEC_CAP_LOG_ADDRS
+is set. If block is true, then wait until the logical addresses have been
+claimed, otherwise just queue it and return. To unconfigure all logical
+addresses call this function with log_addrs set to NULL or with
+log_addrs->num_log_addrs set to 0. The block argument is ignored when
+unconfiguring. This function will just return if the physical address is
+invalid. Once the physical address becomes valid, then the framework will
+attempt to claim these logical addresses.
+
+CEC Pin framework
+-----------------
+
+Most CEC hardware operates on full CEC messages where the software provides
+the message and the hardware handles the low-level CEC protocol. But some
+hardware only drives the CEC pin and software has to handle the low-level
+CEC protocol. The CEC pin framework was created to handle such devices.
+
+Note that due to the close-to-realtime requirements it can never be guaranteed
+to work 100%. This framework uses highres timers internally, but if a
+timer goes off too late by more than 300 microseconds wrong results can
+occur. In reality it appears to be fairly reliable.
+
+One advantage of this low-level implementation is that it can be used as
+a cheap CEC analyser, especially if interrupts can be used to detect
+CEC pin transitions from low to high or vice versa.
+
+.. kernel-doc:: include/media/cec-pin.h
+
+CEC Notifier framework
+----------------------
+
+Most drm HDMI implementations have an integrated CEC implementation and no
+notifier support is needed. But some have independent CEC implementations
+that have their own driver. This could be an IP block for an SoC or a
+completely separate chip that deals with the CEC pin. For those cases a
+drm driver can install a notifier and use the notifier to inform the
+CEC driver about changes in the physical address.
+
+.. kernel-doc:: include/media/cec-notifier.h
diff --git a/Documentation/media/uapi/cec/cec-api.rst b/Documentation/media/uapi/cec/cec-api.rst
new file mode 100644
index 000000000000..b68ca9c1d2e0
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-api.rst
@@ -0,0 +1,46 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. include:: <isonum.txt>
+
+.. _cec:
+
+#########################################
+Part V - Consumer Electronics Control API
+#########################################
+
+This part describes the CEC: Consumer Electronics Control
+
+
+.. only:: html
+
+   .. class:: toc-title
+
+        Table of Contents
+
+.. toctree::
+    :maxdepth: 5
+    :numbered:
+
+    cec-intro
+    cec-funcs
+    cec-header
+
+
+**********************
+Revision and Copyright
+**********************
+Authors:
+
+- Verkuil, Hans <hans.verkuil@cisco.com>
+
+ - Initial version.
+
+**Copyright** |copy| 2016 : Hans Verkuil
+
+****************
+Revision History
+****************
+
+:revision: 1.0.0 / 2016-03-17 (*hv*)
+
+Initial revision
diff --git a/Documentation/media/uapi/cec/cec-func-close.rst b/Documentation/media/uapi/cec/cec-func-close.rst
new file mode 100644
index 000000000000..334358dfa72e
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-func-close.rst
@@ -0,0 +1,47 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _cec-func-close:
+
+***********
+cec close()
+***********
+
+Name
+====
+
+cec-close - Close a cec device
+
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <unistd.h>
+
+
+.. c:function:: int close( int fd )
+    :name: cec-close
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+
+Description
+===========
+
+Closes the cec device. Resources associated with the file descriptor are
+freed. The device configuration remain unchanged.
+
+
+Return Value
+============
+
+:c:func:`close() <cec-close>` returns 0 on success. On error, -1 is returned, and
+``errno`` is set appropriately. Possible error codes are:
+
+``EBADF``
+    ``fd`` is not a valid open file descriptor.
diff --git a/Documentation/media/uapi/cec/cec-func-ioctl.rst b/Documentation/media/uapi/cec/cec-func-ioctl.rst
new file mode 100644
index 000000000000..e2b6260b0086
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-func-ioctl.rst
@@ -0,0 +1,66 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _cec-func-ioctl:
+
+***********
+cec ioctl()
+***********
+
+Name
+====
+
+cec-ioctl - Control a cec device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/ioctl.h>
+
+
+.. c:function:: int ioctl( int fd, int request, void *argp )
+   :name: cec-ioctl
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+``request``
+    CEC ioctl request code as defined in the cec.h header file, for
+    example :ref:`CEC_ADAP_G_CAPS <CEC_ADAP_G_CAPS>`.
+
+``argp``
+    Pointer to a request-specific structure.
+
+
+Description
+===========
+
+The :c:func:`ioctl() <cec-ioctl>` function manipulates cec device parameters. The
+argument ``fd`` must be an open file descriptor.
+
+The ioctl ``request`` code specifies the cec function to be called. It
+has encoded in it whether the argument is an input, output or read/write
+parameter, and the size of the argument ``argp`` in bytes.
+
+Macros and structures definitions specifying cec ioctl requests and
+their parameters are located in the cec.h header file. All cec ioctl
+requests, their respective function and parameters are specified in
+:ref:`cec-user-func`.
+
+
+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.
+
+Request-specific error codes are listed in the individual requests
+descriptions.
+
+When an ioctl that takes an output or read/write parameter fails, the
+parameter remains unmodified.
diff --git a/Documentation/media/uapi/cec/cec-func-open.rst b/Documentation/media/uapi/cec/cec-func-open.rst
new file mode 100644
index 000000000000..5d6663a649bd
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-func-open.rst
@@ -0,0 +1,78 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _cec-func-open:
+
+**********
+cec open()
+**********
+
+Name
+====
+
+cec-open - Open a cec device
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <fcntl.h>
+
+
+.. c:function:: int open( const char *device_name, int flags )
+   :name: cec-open
+
+
+Arguments
+=========
+
+``device_name``
+    Device to be opened.
+
+``flags``
+    Open flags. Access mode must be ``O_RDWR``.
+
+    When the ``O_NONBLOCK`` flag is given, the
+    :ref:`CEC_RECEIVE <CEC_RECEIVE>` and :ref:`CEC_DQEVENT <CEC_DQEVENT>` ioctls
+    will return the ``EAGAIN`` error code when no message or event is available, and
+    ioctls :ref:`CEC_TRANSMIT <CEC_TRANSMIT>`,
+    :ref:`CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` and
+    :ref:`CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+    all return 0.
+
+    Other flags have no effect.
+
+
+Description
+===========
+
+To open a cec device applications call :c:func:`open() <cec-open>` with the
+desired device name. The function has no side effects; the device
+configuration remain unchanged.
+
+When the device is opened in read-only mode, attempts to modify its
+configuration will result in an error, and ``errno`` will be set to
+EBADF.
+
+
+Return Value
+============
+
+:c:func:`open() <cec-open>` returns the new file descriptor on success. On error,
+-1 is returned, and ``errno`` is set appropriately. Possible error codes
+include:
+
+``EACCES``
+    The requested access to the file is not allowed.
+
+``EMFILE``
+    The process already has the maximum number of files open.
+
+``ENFILE``
+    The system limit on the total number of open files has been reached.
+
+``ENOMEM``
+    Insufficient kernel memory was available.
+
+``ENXIO``
+    No device corresponding to this device special file exists.
diff --git a/Documentation/media/uapi/cec/cec-func-poll.rst b/Documentation/media/uapi/cec/cec-func-poll.rst
new file mode 100644
index 000000000000..d49f1ee0742d
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-func-poll.rst
@@ -0,0 +1,77 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _cec-func-poll:
+
+**********
+cec poll()
+**********
+
+Name
+====
+
+cec-poll - Wait for some event on a file descriptor
+
+
+Synopsis
+========
+
+.. code-block:: c
+
+    #include <sys/poll.h>
+
+
+.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
+   :name: cec-poll
+
+Arguments
+=========
+
+``ufds``
+   List of FD events to be watched
+
+``nfds``
+   Number of FD events at the \*ufds array
+
+``timeout``
+   Timeout to wait for events
+
+
+Description
+===========
+
+With the :c:func:`poll() <cec-poll>` function applications can wait for CEC
+events.
+
+On success :c:func:`poll() <cec-poll>` returns the number of file descriptors
+that have been selected (that is, file descriptors for which the
+``revents`` field of the respective struct :c:type:`pollfd`
+is non-zero). CEC devices set the ``POLLIN`` and ``POLLRDNORM`` flags in
+the ``revents`` field if there are messages in the receive queue. If the
+transmit queue has room for new messages, the ``POLLOUT`` and
+``POLLWRNORM`` flags are set. If there are events in the event queue,
+then the ``POLLPRI`` flag is set. When the function times out it returns
+a value of zero, on failure it returns -1 and the ``errno`` variable is
+set appropriately.
+
+For more details see the :c:func:`poll() <cec-poll>` manual page.
+
+
+Return Value
+============
+
+On success, :c:func:`poll() <cec-poll>` returns the number structures which have
+non-zero ``revents`` fields, or zero if the call timed out. On error -1
+is returned, and the ``errno`` variable is set appropriately:
+
+``EBADF``
+    One or more of the ``ufds`` members specify an invalid file
+    descriptor.
+
+``EFAULT``
+    ``ufds`` references an inaccessible memory area.
+
+``EINTR``
+    The call was interrupted by a signal.
+
+``EINVAL``
+    The ``nfds`` argument is greater than ``OPEN_MAX``.
diff --git a/Documentation/media/uapi/cec/cec-funcs.rst b/Documentation/media/uapi/cec/cec-funcs.rst
new file mode 100644
index 000000000000..6d696cead5cb
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-funcs.rst
@@ -0,0 +1,20 @@
+.. _cec-user-func:
+
+******************
+Function Reference
+******************
+
+
+.. toctree::
+    :maxdepth: 1
+
+    cec-func-open
+    cec-func-close
+    cec-func-ioctl
+    cec-func-poll
+    cec-ioc-adap-g-caps
+    cec-ioc-adap-g-log-addrs
+    cec-ioc-adap-g-phys-addr
+    cec-ioc-dqevent
+    cec-ioc-g-mode
+    cec-ioc-receive
diff --git a/Documentation/media/uapi/cec/cec-header.rst b/Documentation/media/uapi/cec/cec-header.rst
new file mode 100644
index 000000000000..d5a9a2828274
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-header.rst
@@ -0,0 +1,10 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _cec_header:
+
+***************
+CEC Header File
+***************
+
+.. kernel-include:: $BUILDDIR/cec.h.rst
+
diff --git a/Documentation/media/uapi/cec/cec-intro.rst b/Documentation/media/uapi/cec/cec-intro.rst
new file mode 100644
index 000000000000..07ee2b8f89d6
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-intro.rst
@@ -0,0 +1,40 @@
+.. _cec-intro:
+
+Introduction
+============
+
+HDMI connectors provide a single pin for use by the Consumer Electronics
+Control protocol. This protocol allows different devices connected by an
+HDMI cable to communicate. The protocol for CEC version 1.4 is defined
+in supplements 1 (CEC) and 2 (HEAC or HDMI Ethernet and Audio Return
+Channel) of the HDMI 1.4a (:ref:`hdmi`) specification and the
+extensions added to CEC version 2.0 are defined in chapter 11 of the
+HDMI 2.0 (:ref:`hdmi2`) specification.
+
+The bitrate is very slow (effectively no more than 36 bytes per second)
+and is based on the ancient AV.link protocol used in old SCART
+connectors. The protocol closely resembles a crazy Rube Goldberg
+contraption and is an unholy mix of low and high level messages. Some
+messages, especially those part of the HEAC protocol layered on top of
+CEC, need to be handled by the kernel, others can be handled either by
+the kernel or by userspace.
+
+In addition, CEC can be implemented in HDMI receivers, transmitters and
+in USB devices that have an HDMI input and an HDMI output and that
+control just the CEC pin.
+
+Drivers that support CEC will create a CEC device node (/dev/cecX) to
+give userspace access to the CEC adapter. The
+:ref:`CEC_ADAP_G_CAPS` ioctl will tell userspace what it is allowed to do.
+
+In order to check the support and test it, it is suggested to download
+the `v4l-utils <https://git.linuxtv.org/v4l-utils.git/>`_ package. It
+provides three tools to handle CEC:
+
+- cec-ctl: the Swiss army knife of CEC. Allows you to configure, transmit
+  and monitor CEC messages.
+
+- cec-compliance: does a CEC compliance test of a remote CEC device to
+  determine how compliant the CEC implementation is.
+
+- cec-follower: emulates a CEC follower.
diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst
new file mode 100644
index 000000000000..6c1f6efb822e
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst
@@ -0,0 +1,139 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CEC_ADAP_G_CAPS:
+
+*********************
+ioctl CEC_ADAP_G_CAPS
+*********************
+
+Name
+====
+
+CEC_ADAP_G_CAPS - Query device capabilities
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_ADAP_G_CAPS, struct cec_caps *argp )
+    :name: CEC_ADAP_G_CAPS
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+
+
+Description
+===========
+
+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 :c:type:`cec_caps`. The driver fills the structure and
+returns the information to the application. The ioctl never fails.
+
+.. tabularcolumns:: |p{1.2cm}|p{2.5cm}|p{13.8cm}|
+
+.. c:type:: cec_caps
+
+.. flat-table:: struct cec_caps
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - char
+      - ``driver[32]``
+      - The name of the cec adapter driver.
+    * - char
+      - ``name[32]``
+      - The name of this CEC adapter. The combination ``driver`` and
+	``name`` must be unique.
+    * - __u32
+      - ``capabilities``
+      - The capabilities of the CEC adapter, see
+	:ref:`cec-capabilities`.
+    * - __u32
+      - ``version``
+      - CEC Framework API version, formatted with the ``KERNEL_VERSION()``
+	macro.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. _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.
+    * .. _`CEC-CAP-NEEDS-HPD`:
+
+      - ``CEC_CAP_NEEDS_HPD``
+      - 0x00000040
+      - The CEC hardware is only active if the HDMI Hotplug Detect pin is
+        high. This makes it impossible to use CEC to wake up displays that
+	set the HPD pin low when in standby mode, but keep the CEC bus
+	alive.
+    * .. _`CEC-CAP-MONITOR-PIN`:
+
+      - ``CEC_CAP_MONITOR_PIN``
+      - 0x00000080
+      - The CEC hardware can monitor CEC pin changes from low to high voltage
+        and vice versa. When in pin monitoring mode the application will
+	receive ``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events.
+
+
+
+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.
diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst
new file mode 100644
index 000000000000..84f431a022ad
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-log-addrs.rst
@@ -0,0 +1,371 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CEC_ADAP_LOG_ADDRS:
+.. _CEC_ADAP_G_LOG_ADDRS:
+.. _CEC_ADAP_S_LOG_ADDRS:
+
+****************************************************
+ioctls CEC_ADAP_G_LOG_ADDRS and CEC_ADAP_S_LOG_ADDRS
+****************************************************
+
+Name
+====
+
+CEC_ADAP_G_LOG_ADDRS, CEC_ADAP_S_LOG_ADDRS - Get or set the logical addresses
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_ADAP_G_LOG_ADDRS, struct cec_log_addrs *argp )
+   :name: CEC_ADAP_G_LOG_ADDRS
+
+.. c:function:: int ioctl( int fd, CEC_ADAP_S_LOG_ADDRS, struct cec_log_addrs *argp )
+   :name: CEC_ADAP_S_LOG_ADDRS
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+    Pointer to struct :c:type:`cec_log_addrs`.
+
+Description
+===========
+
+To query the current CEC logical addresses, applications call
+:ref:`ioctl CEC_ADAP_G_LOG_ADDRS <CEC_ADAP_G_LOG_ADDRS>` with a pointer to a
+struct :c:type:`cec_log_addrs` where the driver stores the logical addresses.
+
+To set new logical addresses, applications fill in
+struct :c:type:`cec_log_addrs` and call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+with a pointer to this struct. The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+is only available if ``CEC_CAP_LOG_ADDRS`` is set (the ``ENOTTY`` error code is
+returned otherwise). The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+can only be called by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not
+the ``EBUSY`` error code will be returned.
+
+To clear existing logical addresses set ``num_log_addrs`` to 0. All other fields
+will be ignored in that case. The adapter will go to the unconfigured state and the
+``cec_version``, ``vendor_id`` and ``osd_name`` fields are all reset to their default
+values (CEC version 2.0, no vendor ID and an empty OSD name).
+
+If the physical address is valid (see :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>`),
+then this ioctl will block until all requested logical
+addresses have been claimed. If the file descriptor is in non-blocking mode then it will
+not wait for the logical addresses to be claimed, instead it just returns 0.
+
+A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the
+logical addresses are claimed or cleared.
+
+Attempting to call :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` when
+logical address types are already defined will return with error ``EBUSY``.
+
+.. c:type:: cec_log_addrs
+
+.. tabularcolumns:: |p{1.0cm}|p{8.0cm}|p{7.5cm}|
+
+.. cssclass:: longtable
+
+.. flat-table:: struct cec_log_addrs
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - __u8
+      - ``log_addr[CEC_MAX_LOG_ADDRS]``
+      - The actual logical addresses that were claimed. This is set by the
+	driver. If no logical address could be claimed, then it is set to
+	``CEC_LOG_ADDR_INVALID``. If this adapter is Unregistered, then
+	``log_addr[0]`` is set to 0xf and all others to
+	``CEC_LOG_ADDR_INVALID``.
+    * - __u16
+      - ``log_addr_mask``
+      - The bitmask of all logical addresses this adapter has claimed. If
+	this adapter is Unregistered then ``log_addr_mask`` sets bit 15
+	and clears all other bits. If this adapter is not configured at
+	all, then ``log_addr_mask`` is set to 0. Set by the driver.
+    * - __u8
+      - ``cec_version``
+      - The CEC version that this adapter shall use. See
+	:ref:`cec-versions`. Used to implement the
+	``CEC_MSG_CEC_VERSION`` and ``CEC_MSG_REPORT_FEATURES`` messages.
+	Note that :ref:`CEC_OP_CEC_VERSION_1_3A <CEC-OP-CEC-VERSION-1-3A>` is not allowed by the CEC
+	framework.
+    * - __u8
+      - ``num_log_addrs``
+      - Number of logical addresses to set up. Must be ≤
+	``available_log_addrs`` as returned by
+	:ref:`CEC_ADAP_G_CAPS`. All arrays in
+	this structure are only filled up to index
+	``available_log_addrs``-1. The remaining array elements will be
+	ignored. Note that the CEC 2.0 standard allows for a maximum of 2
+	logical addresses, although some hardware has support for more.
+	``CEC_MAX_LOG_ADDRS`` is 4. The driver will return the actual
+	number of logical addresses it could claim, which may be less than
+	what was requested. If this field is set to 0, then the CEC
+	adapter shall clear all claimed logical addresses and all other
+	fields will be ignored.
+    * - __u32
+      - ``vendor_id``
+      - The vendor ID is a 24-bit number that identifies the specific
+	vendor or entity. Based on this ID vendor specific commands may be
+	defined. If you do not want a vendor ID then set it to
+	``CEC_VENDOR_ID_NONE``.
+    * - __u32
+      - ``flags``
+      - Flags. See :ref:`cec-log-addrs-flags` for a list of available flags.
+    * - char
+      - ``osd_name[15]``
+      - The On-Screen Display name as is returned by the
+	``CEC_MSG_SET_OSD_NAME`` message.
+    * - __u8
+      - ``primary_device_type[CEC_MAX_LOG_ADDRS]``
+      - Primary device type for each logical address. See
+	:ref:`cec-prim-dev-types` for possible types.
+    * - __u8
+      - ``log_addr_type[CEC_MAX_LOG_ADDRS]``
+      - Logical address types. See :ref:`cec-log-addr-types` for
+	possible types. The driver will update this with the actual
+	logical address type that it claimed (e.g. it may have to fallback
+	to :ref:`CEC_LOG_ADDR_TYPE_UNREGISTERED <CEC-LOG-ADDR-TYPE-UNREGISTERED>`).
+    * - __u8
+      - ``all_device_types[CEC_MAX_LOG_ADDRS]``
+      - CEC 2.0 specific: the bit mask of all device types. See
+	:ref:`cec-all-dev-types-flags`. It is used in the CEC 2.0
+	``CEC_MSG_REPORT_FEATURES`` message. For CEC 1.4 you can either leave
+	this field to 0, or fill it in according to the CEC 2.0 guidelines to
+	give the CEC framework more information about the device type, even
+	though the framework won't use it directly in the CEC message.
+    * - __u8
+      - ``features[CEC_MAX_LOG_ADDRS][12]``
+      - Features for each logical address. It is used in the CEC 2.0
+	``CEC_MSG_REPORT_FEATURES`` message. The 12 bytes include both the
+	RC Profile and the Device Features. For CEC 1.4 you can either leave
+        this field to all 0, or fill it in according to the CEC 2.0 guidelines to
+        give the CEC framework more information about the device type, even
+        though the framework won't use it directly in the CEC message.
+
+
+.. tabularcolumns:: |p{7.8cm}|p{1.0cm}|p{8.7cm}|
+
+.. _cec-log-addrs-flags:
+
+.. flat-table:: Flags for struct cec_log_addrs
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-LOG-ADDRS-FL-ALLOW-UNREG-FALLBACK`:
+
+      - ``CEC_LOG_ADDRS_FL_ALLOW_UNREG_FALLBACK``
+      - 1
+      - By default if no logical address of the requested type can be claimed, then
+	it will go back to the unconfigured state. If this flag is set, then it will
+	fallback to the Unregistered logical address. Note that if the Unregistered
+	logical address was explicitly requested, then this flag has no effect.
+    * .. _`CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU`:
+
+      - ``CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU``
+      - 2
+      - By default the ``CEC_MSG_USER_CONTROL_PRESSED`` and ``CEC_MSG_USER_CONTROL_RELEASED``
+        messages are only passed on to the follower(s), if any. If this flag is set,
+	then these messages are also passed on to the remote control input subsystem
+	and will appear as keystrokes. This features needs to be enabled explicitly.
+	If CEC is used to enter e.g. passwords, then you may not want to enable this
+	to avoid trivial snooping of the keystrokes.
+    * .. _`CEC-LOG-ADDRS-FL-CDC-ONLY`:
+
+      - ``CEC_LOG_ADDRS_FL_CDC_ONLY``
+      - 4
+      - If this flag is set, then the device is CDC-Only. CDC-Only CEC devices
+	are CEC devices that can only handle CDC messages.
+
+	All other messages are ignored.
+
+
+.. tabularcolumns:: |p{7.8cm}|p{1.0cm}|p{8.7cm}|
+
+.. _cec-versions:
+
+.. flat-table:: CEC Versions
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-OP-CEC-VERSION-1-3A`:
+
+      - ``CEC_OP_CEC_VERSION_1_3A``
+      - 4
+      - CEC version according to the HDMI 1.3a standard.
+    * .. _`CEC-OP-CEC-VERSION-1-4B`:
+
+      - ``CEC_OP_CEC_VERSION_1_4B``
+      - 5
+      - CEC version according to the HDMI 1.4b standard.
+    * .. _`CEC-OP-CEC-VERSION-2-0`:
+
+      - ``CEC_OP_CEC_VERSION_2_0``
+      - 6
+      - CEC version according to the HDMI 2.0 standard.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _cec-prim-dev-types:
+
+.. flat-table:: CEC Primary Device Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-OP-PRIM-DEVTYPE-TV`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_TV``
+      - 0
+      - Use for a TV.
+    * .. _`CEC-OP-PRIM-DEVTYPE-RECORD`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_RECORD``
+      - 1
+      - Use for a recording device.
+    * .. _`CEC-OP-PRIM-DEVTYPE-TUNER`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_TUNER``
+      - 3
+      - Use for a device with a tuner.
+    * .. _`CEC-OP-PRIM-DEVTYPE-PLAYBACK`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_PLAYBACK``
+      - 4
+      - Use for a playback device.
+    * .. _`CEC-OP-PRIM-DEVTYPE-AUDIOSYSTEM`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM``
+      - 5
+      - Use for an audio system (e.g. an audio/video receiver).
+    * .. _`CEC-OP-PRIM-DEVTYPE-SWITCH`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_SWITCH``
+      - 6
+      - Use for a CEC switch.
+    * .. _`CEC-OP-PRIM-DEVTYPE-VIDEOPROC`:
+
+      - ``CEC_OP_PRIM_DEVTYPE_VIDEOPROC``
+      - 7
+      - Use for a video processor device.
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _cec-log-addr-types:
+
+.. flat-table:: CEC Logical Address Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-LOG-ADDR-TYPE-TV`:
+
+      - ``CEC_LOG_ADDR_TYPE_TV``
+      - 0
+      - Use for a TV.
+    * .. _`CEC-LOG-ADDR-TYPE-RECORD`:
+
+      - ``CEC_LOG_ADDR_TYPE_RECORD``
+      - 1
+      - Use for a recording device.
+    * .. _`CEC-LOG-ADDR-TYPE-TUNER`:
+
+      - ``CEC_LOG_ADDR_TYPE_TUNER``
+      - 2
+      - Use for a tuner device.
+    * .. _`CEC-LOG-ADDR-TYPE-PLAYBACK`:
+
+      - ``CEC_LOG_ADDR_TYPE_PLAYBACK``
+      - 3
+      - Use for a playback device.
+    * .. _`CEC-LOG-ADDR-TYPE-AUDIOSYSTEM`:
+
+      - ``CEC_LOG_ADDR_TYPE_AUDIOSYSTEM``
+      - 4
+      - Use for an audio system device.
+    * .. _`CEC-LOG-ADDR-TYPE-SPECIFIC`:
+
+      - ``CEC_LOG_ADDR_TYPE_SPECIFIC``
+      - 5
+      - Use for a second TV or for a video processor device.
+    * .. _`CEC-LOG-ADDR-TYPE-UNREGISTERED`:
+
+      - ``CEC_LOG_ADDR_TYPE_UNREGISTERED``
+      - 6
+      - Use this if you just want to remain unregistered. Used for pure
+	CEC switches or CDC-only devices (CDC: Capability Discovery and
+	Control).
+
+
+
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
+.. _cec-all-dev-types-flags:
+
+.. flat-table:: CEC All Device Types Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-OP-ALL-DEVTYPE-TV`:
+
+      - ``CEC_OP_ALL_DEVTYPE_TV``
+      - 0x80
+      - This supports the TV type.
+    * .. _`CEC-OP-ALL-DEVTYPE-RECORD`:
+
+      - ``CEC_OP_ALL_DEVTYPE_RECORD``
+      - 0x40
+      - This supports the Recording type.
+    * .. _`CEC-OP-ALL-DEVTYPE-TUNER`:
+
+      - ``CEC_OP_ALL_DEVTYPE_TUNER``
+      - 0x20
+      - This supports the Tuner type.
+    * .. _`CEC-OP-ALL-DEVTYPE-PLAYBACK`:
+
+      - ``CEC_OP_ALL_DEVTYPE_PLAYBACK``
+      - 0x10
+      - This supports the Playback type.
+    * .. _`CEC-OP-ALL-DEVTYPE-AUDIOSYSTEM`:
+
+      - ``CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM``
+      - 0x08
+      - This supports the Audio System type.
+    * .. _`CEC-OP-ALL-DEVTYPE-SWITCH`:
+
+      - ``CEC_OP_ALL_DEVTYPE_SWITCH``
+      - 0x04
+      - This supports the CEC Switch or Video Processing type.
+
+
+
+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.
+
+The :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>` can return the following
+error codes:
+
+ENOTTY
+    The ``CEC_CAP_LOG_ADDRS`` capability wasn't set, so this ioctl is not supported.
+
+EBUSY
+    The CEC adapter is currently configuring itself, or it is already configured and
+    ``num_log_addrs`` is non-zero, or another filehandle is in exclusive follower or
+    initiator mode, or the filehandle is in mode ``CEC_MODE_NO_INITIATOR``.
+
+EINVAL
+    The contents of struct :c:type:`cec_log_addrs` is invalid.
diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst
new file mode 100644
index 000000000000..9e49d4be35d5
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-phys-addr.rst
@@ -0,0 +1,93 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CEC_ADAP_PHYS_ADDR:
+.. _CEC_ADAP_G_PHYS_ADDR:
+.. _CEC_ADAP_S_PHYS_ADDR:
+
+****************************************************
+ioctls CEC_ADAP_G_PHYS_ADDR and CEC_ADAP_S_PHYS_ADDR
+****************************************************
+
+Name
+====
+
+CEC_ADAP_G_PHYS_ADDR, CEC_ADAP_S_PHYS_ADDR - Get or set the physical address
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_ADAP_G_PHYS_ADDR, __u16 *argp )
+    :name: CEC_ADAP_G_PHYS_ADDR
+
+.. c:function:: int ioctl( int fd, CEC_ADAP_S_PHYS_ADDR, __u16 *argp )
+    :name: CEC_ADAP_S_PHYS_ADDR
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+    Pointer to the CEC address.
+
+Description
+===========
+
+To query the current physical address applications call
+:ref:`ioctl CEC_ADAP_G_PHYS_ADDR <CEC_ADAP_G_PHYS_ADDR>` with a pointer to a __u16 where the
+driver stores the physical address.
+
+To set a new physical address applications store the physical address in
+a __u16 and call :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` with a pointer to
+this integer. The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` is only available if
+``CEC_CAP_PHYS_ADDR`` is set (the ``ENOTTY`` error code will be returned
+otherwise). The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can only be called
+by a file descriptor in initiator mode (see :ref:`CEC_S_MODE`), if not
+the ``EBUSY`` error code will be returned.
+
+To clear an existing physical address use ``CEC_PHYS_ADDR_INVALID``.
+The adapter will go to the unconfigured state.
+
+If logical address types have been defined (see :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`),
+then this ioctl will block until all
+requested logical addresses have been claimed. If the file descriptor is in non-blocking mode
+then it will not wait for the logical addresses to be claimed, instead it just returns 0.
+
+A :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` event is sent when the physical address
+changes.
+
+The physical address is a 16-bit number where each group of 4 bits
+represent a digit of the physical address a.b.c.d where the most
+significant 4 bits represent 'a'. The CEC root device (usually the TV)
+has address 0.0.0.0. Every device that is hooked up to an input of the
+TV has address a.0.0.0 (where 'a' is ≥ 1), devices hooked up to those in
+turn have addresses a.b.0.0, etc. So a topology of up to 5 devices deep
+is supported. The physical address a device shall use is stored in the
+EDID of the sink.
+
+For example, the EDID for each HDMI input of the TV will have a
+different physical address of the form a.0.0.0 that the sources will
+read out and use as their physical address.
+
+
+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.
+
+The :ref:`ioctl CEC_ADAP_S_PHYS_ADDR <CEC_ADAP_S_PHYS_ADDR>` can return the following
+error codes:
+
+ENOTTY
+    The ``CEC_CAP_PHYS_ADDR`` capability wasn't set, so this ioctl is not supported.
+
+EBUSY
+    Another filehandle is in exclusive follower or initiator mode, or the filehandle
+    is in mode ``CEC_MODE_NO_INITIATOR``.
+
+EINVAL
+    The physical address is malformed.
diff --git a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
new file mode 100644
index 000000000000..b6fd86424fbb
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst
@@ -0,0 +1,226 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CEC_DQEVENT:
+
+*****************
+ioctl CEC_DQEVENT
+*****************
+
+Name
+====
+
+CEC_DQEVENT - Dequeue a CEC event
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_DQEVENT, struct cec_event *argp )
+    :name: CEC_DQEVENT
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+
+
+Description
+===========
+
+CEC devices can send asynchronous events. These can be retrieved by
+calling :c:func:`CEC_DQEVENT`. If the file descriptor is in
+non-blocking mode and no event is pending, then it will return -1 and
+set errno to the ``EAGAIN`` error code.
+
+The internal event queues are per-filehandle and per-event type. If
+there is no more room in a queue then the last event is overwritten with
+the new one. This means that intermediate results can be thrown away but
+that the latest event is always available. This also means that is it
+possible to read two successive events that have the same value (e.g.
+two :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>` events with
+the same state). In that case the intermediate state changes were lost but
+it is guaranteed that the state did change in between the two events.
+
+.. tabularcolumns:: |p{1.2cm}|p{2.9cm}|p{13.4cm}|
+
+.. c:type:: cec_event_state_change
+
+.. flat-table:: struct cec_event_state_change
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 8
+
+    * - __u16
+      - ``phys_addr``
+      - The current physical address. This is ``CEC_PHYS_ADDR_INVALID`` if no
+        valid physical address is set.
+    * - __u16
+      - ``log_addr_mask``
+      - The current set of claimed logical addresses. This is 0 if no logical
+        addresses are claimed or if ``phys_addr`` is ``CEC_PHYS_ADDR_INVALID``.
+	If bit 15 is set (``1 << CEC_LOG_ADDR_UNREGISTERED``) then this device
+	has the unregistered logical address. In that case all other bits are 0.
+
+
+.. c:type:: cec_event_lost_msgs
+
+.. tabularcolumns:: |p{1.0cm}|p{2.0cm}|p{14.5cm}|
+
+.. flat-table:: struct cec_event_lost_msgs
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - __u32
+      - ``lost_msgs``
+      - Set to the number of lost messages since the filehandle was opened
+	or since the last time this event was dequeued for this
+	filehandle. The messages lost are the oldest messages. So when a
+	new message arrives and there is no more room, then the oldest
+	message is discarded to make room for the new one. The internal
+	size of the message queue guarantees that all messages received in
+	the last two seconds will be stored. Since messages should be
+	replied to within a second according to the CEC specification,
+	this is more than enough.
+
+
+.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}|
+
+.. c:type:: cec_event
+
+.. flat-table:: struct cec_event
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 1 8
+
+    * - __u64
+      - ``ts``
+      - :cspan:`1`\ Timestamp of the event in ns.
+
+	The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock.
+
+	To access the same clock from userspace use :c:func:`clock_gettime`.
+    * - __u32
+      - ``event``
+      - :cspan:`1` The CEC event type, see :ref:`cec-events`.
+    * - __u32
+      - ``flags``
+      - :cspan:`1` Event flags, see :ref:`cec-event-flags`.
+    * - union
+      - (anonymous)
+      -
+      -
+    * -
+      - struct cec_event_state_change
+      - ``state_change``
+      - The new adapter state as sent by the :ref:`CEC_EVENT_STATE_CHANGE <CEC-EVENT-STATE-CHANGE>`
+	event.
+    * -
+      - struct cec_event_lost_msgs
+      - ``lost_msgs``
+      - The number of lost messages as sent by the :ref:`CEC_EVENT_LOST_MSGS <CEC-EVENT-LOST-MSGS>`
+	event.
+
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-events:
+
+.. flat-table:: CEC Events Types
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-EVENT-STATE-CHANGE`:
+
+      - ``CEC_EVENT_STATE_CHANGE``
+      - 1
+      - Generated when the CEC Adapter's state changes. When open() is
+	called an initial event will be generated for that filehandle with
+	the CEC Adapter's state at that time.
+    * .. _`CEC-EVENT-LOST-MSGS`:
+
+      - ``CEC_EVENT_LOST_MSGS``
+      - 2
+      - Generated if one or more CEC messages were lost because the
+	application didn't dequeue CEC messages fast enough.
+    * .. _`CEC-EVENT-PIN-CEC-LOW`:
+
+      - ``CEC_EVENT_PIN_CEC_LOW``
+      - 3
+      - Generated if the CEC pin goes from a high voltage to a low voltage.
+        Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set.
+    * .. _`CEC-EVENT-PIN-CEC-HIGH`:
+
+      - ``CEC_EVENT_PIN_CEC_HIGH``
+      - 4
+      - Generated if the CEC pin goes from a low voltage to a high voltage.
+        Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set.
+    * .. _`CEC-EVENT-PIN-HPD-LOW`:
+
+      - ``CEC_EVENT_PIN_HPD_LOW``
+      - 5
+      - Generated if the HPD pin goes from a high voltage to a low voltage.
+	Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set. When open() is called, the HPD pin can be read and
+	if the HPD is low, then an initial event will be generated for that
+	filehandle.
+    * .. _`CEC-EVENT-PIN-HPD-HIGH`:
+
+      - ``CEC_EVENT_PIN_HPD_HIGH``
+      - 6
+      - Generated if the HPD pin goes from a low voltage to a high voltage.
+	Only applies to adapters that have the ``CEC_CAP_MONITOR_PIN``
+	capability set. When open() is called, the HPD pin can be read and
+	if the HPD is high, then an initial event will be generated for that
+	filehandle.
+
+
+.. tabularcolumns:: |p{6.0cm}|p{0.6cm}|p{10.9cm}|
+
+.. _cec-event-flags:
+
+.. flat-table:: CEC Event Flags
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 8
+
+    * .. _`CEC-EVENT-FL-INITIAL-STATE`:
+
+      - ``CEC_EVENT_FL_INITIAL_STATE``
+      - 1
+      - Set for the initial events that are generated when the device is
+	opened. See the table above for which events do this. This allows
+	applications to learn the initial state of the CEC adapter at
+	open() time.
+    * .. _`CEC-EVENT-FL-DROPPED-EVENTS`:
+
+      - ``CEC_EVENT_FL_DROPPED_EVENTS``
+      - 2
+      - Set if one or more events of the given event type have been dropped.
+        This is an indication that the application cannot keep up.
+
+
+
+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.
+
+The :ref:`ioctl CEC_DQEVENT <CEC_DQEVENT>` can return the following
+error codes:
+
+EAGAIN
+    This is returned when the filehandle is in non-blocking mode and there
+    are no pending events.
+
+ERESTARTSYS
+    An interrupt (e.g. Ctrl-C) arrived while in blocking mode waiting for
+    events to arrive.
diff --git a/Documentation/media/uapi/cec/cec-ioc-g-mode.rst b/Documentation/media/uapi/cec/cec-ioc-g-mode.rst
new file mode 100644
index 000000000000..508e2e325683
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-ioc-g-mode.rst
@@ -0,0 +1,293 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CEC_MODE:
+.. _CEC_G_MODE:
+.. _CEC_S_MODE:
+
+********************************
+ioctls CEC_G_MODE and CEC_S_MODE
+********************************
+
+CEC_G_MODE, CEC_S_MODE - Get or set exclusive use of the CEC adapter
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_G_MODE, __u32 *argp )
+   :name: CEC_G_MODE
+
+.. c:function:: int ioctl( int fd, CEC_S_MODE, __u32 *argp )
+   :name: CEC_S_MODE
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+    Pointer to CEC mode.
+
+Description
+===========
+
+By default any filehandle can use :ref:`CEC_TRANSMIT`, but in order to prevent
+applications from stepping on each others toes it must be possible to
+obtain exclusive access to the CEC adapter. This ioctl sets the
+filehandle to initiator and/or follower mode which can be exclusive
+depending on the chosen mode. The initiator is the filehandle that is
+used to initiate messages, i.e. it commands other CEC devices. The
+follower is the filehandle that receives messages sent to the CEC
+adapter and processes them. The same filehandle can be both initiator
+and follower, or this role can be taken by two different filehandles.
+
+When a CEC message is received, then the CEC framework will decide how
+it will be processed. If the message is a reply to an earlier
+transmitted message, then the reply is sent back to the filehandle that
+is waiting for it. In addition the CEC framework will process it.
+
+If the message is not a reply, then the CEC framework will process it
+first. If there is no follower, then the message is just discarded and a
+feature abort is sent back to the initiator if the framework couldn't
+process it. If there is a follower, then the message is passed on to the
+follower who will use :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` to dequeue
+the new message. The framework expects the follower to make the right
+decisions.
+
+The CEC framework will process core messages unless requested otherwise
+by the follower. The follower can enable the passthrough mode. In that
+case, the CEC framework will pass on most core messages without
+processing them and the follower will have to implement those messages.
+There are some messages that the core will always process, regardless of
+the passthrough mode. See :ref:`cec-core-processing` for details.
+
+If there is no initiator, then any CEC filehandle can use
+:ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. If there is an exclusive
+initiator then only that initiator can call
+:ref:`CEC_TRANSMIT`. The follower can of course
+always call :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`.
+
+Available initiator modes are:
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-mode-initiator_e:
+
+.. flat-table:: Initiator Modes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-MODE-NO-INITIATOR`:
+
+      - ``CEC_MODE_NO_INITIATOR``
+      - 0x0
+      - This is not an initiator, i.e. it cannot transmit CEC messages or
+	make any other changes to the CEC adapter.
+    * .. _`CEC-MODE-INITIATOR`:
+
+      - ``CEC_MODE_INITIATOR``
+      - 0x1
+      - This is an initiator (the default when the device is opened) and
+	it can transmit CEC messages and make changes to the CEC adapter,
+	unless there is an exclusive initiator.
+    * .. _`CEC-MODE-EXCL-INITIATOR`:
+
+      - ``CEC_MODE_EXCL_INITIATOR``
+      - 0x2
+      - This is an exclusive initiator and this file descriptor is the
+	only one that can transmit CEC messages and make changes to the
+	CEC adapter. If someone else is already the exclusive initiator
+	then an attempt to become one will return the ``EBUSY`` error code
+	error.
+
+
+Available follower modes are:
+
+.. tabularcolumns:: |p{6.6cm}|p{0.9cm}|p{10.0cm}|
+
+.. _cec-mode-follower_e:
+
+.. cssclass:: longtable
+
+.. flat-table:: Follower Modes
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-MODE-NO-FOLLOWER`:
+
+      - ``CEC_MODE_NO_FOLLOWER``
+      - 0x00
+      - This is not a follower (the default when the device is opened).
+    * .. _`CEC-MODE-FOLLOWER`:
+
+      - ``CEC_MODE_FOLLOWER``
+      - 0x10
+      - This is a follower and it will receive CEC messages unless there
+	is an exclusive follower. You cannot become a follower if
+	:ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>` is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`
+	was specified, the ``EINVAL`` error code is returned in that case.
+    * .. _`CEC-MODE-EXCL-FOLLOWER`:
+
+      - ``CEC_MODE_EXCL_FOLLOWER``
+      - 0x20
+      - This is an exclusive follower and only this file descriptor will
+	receive CEC messages for processing. If someone else is already
+	the exclusive follower then an attempt to become one will return
+	the ``EBUSY`` error code. You cannot become a follower if
+	:ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>` is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`
+	was specified, the ``EINVAL`` error code is returned in that case.
+    * .. _`CEC-MODE-EXCL-FOLLOWER-PASSTHRU`:
+
+      - ``CEC_MODE_EXCL_FOLLOWER_PASSTHRU``
+      - 0x30
+      - This is an exclusive follower and only this file descriptor will
+	receive CEC messages for processing. In addition it will put the
+	CEC device into passthrough mode, allowing the exclusive follower
+	to handle most core messages instead of relying on the CEC
+	framework for that. If someone else is already the exclusive
+	follower then an attempt to become one will return the ``EBUSY`` error
+	code. You cannot become a follower if :ref:`CEC_CAP_TRANSMIT <CEC-CAP-TRANSMIT>`
+	is not set or if :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>` was specified,
+	the ``EINVAL`` error code is returned in that case.
+    * .. _`CEC-MODE-MONITOR-PIN`:
+
+      - ``CEC_MODE_MONITOR_PIN``
+      - 0xd0
+      - Put the file descriptor into pin monitoring mode. Can only be used in
+	combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`,
+	otherwise the ``EINVAL`` error code will be returned.
+	This mode requires that the :ref:`CEC_CAP_MONITOR_PIN <CEC-CAP-MONITOR-PIN>`
+	capability is set, otherwise the ``EINVAL`` error code is returned.
+	While in pin monitoring mode this file descriptor can receive the
+	``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events to see the
+	low-level CEC pin transitions. This is very useful for debugging.
+	This mode is only allowed if the process has the ``CAP_NET_ADMIN``
+	capability. If that is not set, then the ``EPERM`` error code is returned.
+    * .. _`CEC-MODE-MONITOR`:
+
+      - ``CEC_MODE_MONITOR``
+      - 0xe0
+      - Put the file descriptor into monitor mode. Can only be used in
+	combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`,i
+	otherwise the ``EINVAL`` error code will be returned.
+	In monitor mode all messages this CEC
+	device transmits and all messages it receives (both broadcast
+	messages and directed messages for one its logical addresses) will
+	be reported. This is very useful for debugging. This is only
+	allowed if the process has the ``CAP_NET_ADMIN`` capability. If
+	that is not set, then the ``EPERM`` error code is returned.
+    * .. _`CEC-MODE-MONITOR-ALL`:
+
+      - ``CEC_MODE_MONITOR_ALL``
+      - 0xf0
+      - Put the file descriptor into 'monitor all' mode. Can only be used
+	in combination with :ref:`CEC_MODE_NO_INITIATOR <CEC-MODE-NO-INITIATOR>`, otherwise
+	the ``EINVAL`` error code will be returned. In 'monitor all' mode all messages
+	this CEC device transmits and all messages it receives, including
+	directed messages for other CEC devices will be reported. This is
+	very useful for debugging, but not all devices support this. This
+	mode requires that the :ref:`CEC_CAP_MONITOR_ALL <CEC-CAP-MONITOR-ALL>` capability is set,
+	otherwise the ``EINVAL`` error code is returned. This is only allowed if
+	the process has the ``CAP_NET_ADMIN`` capability. If that is not
+	set, then the ``EPERM`` error code is returned.
+
+
+Core message processing details:
+
+.. tabularcolumns:: |p{6.6cm}|p{10.9cm}|
+
+.. _cec-core-processing:
+
+.. flat-table:: Core Message Processing
+    :header-rows:  0
+    :stub-columns: 0
+    :widths: 1 8
+
+    * .. _`CEC-MSG-GET-CEC-VERSION`:
+
+      - ``CEC_MSG_GET_CEC_VERSION``
+      - The core will return the CEC version that was set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing and this message has to be handled by a follower
+	instead.
+    * .. _`CEC-MSG-GIVE-DEVICE-VENDOR-ID`:
+
+      - ``CEC_MSG_GIVE_DEVICE_VENDOR_ID``
+      - The core will return the vendor ID that was set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing and this message has to be handled by a follower
+	instead.
+    * .. _`CEC-MSG-ABORT`:
+
+      - ``CEC_MSG_ABORT``
+      - The core will return a Feature Abort message with reason
+        'Feature Refused' as per the specification, except when in
+	passthrough mode. In passthrough mode the core does nothing
+	and this message has to be handled by a follower instead.
+    * .. _`CEC-MSG-GIVE-PHYSICAL-ADDR`:
+
+      - ``CEC_MSG_GIVE_PHYSICAL_ADDR``
+      - The core will report the current physical address, except when
+        in passthrough mode. In passthrough mode the core does nothing
+	and this message has to be handled by a follower instead.
+    * .. _`CEC-MSG-GIVE-OSD-NAME`:
+
+      - ``CEC_MSG_GIVE_OSD_NAME``
+      - The core will report the current OSD name that was set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing and this message has to be handled by a follower
+	instead.
+    * .. _`CEC-MSG-GIVE-FEATURES`:
+
+      - ``CEC_MSG_GIVE_FEATURES``
+      - The core will do nothing if the CEC version is older than 2.0,
+        otherwise it will report the current features that were set with
+	:ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`,
+	except when in passthrough mode. In passthrough mode the core
+	does nothing (for any CEC version) and this message has to be handled
+	by a follower instead.
+    * .. _`CEC-MSG-USER-CONTROL-PRESSED`:
+
+      - ``CEC_MSG_USER_CONTROL_PRESSED``
+      - If :ref:`CEC_CAP_RC <CEC-CAP-RC>` is set and if
+        :ref:`CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU <CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU>`
+	is set, then generate a remote control key
+	press. This message is always passed on to the follower(s).
+    * .. _`CEC-MSG-USER-CONTROL-RELEASED`:
+
+      - ``CEC_MSG_USER_CONTROL_RELEASED``
+      - If :ref:`CEC_CAP_RC <CEC-CAP-RC>` is set and if
+        :ref:`CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU <CEC-LOG-ADDRS-FL-ALLOW-RC-PASSTHRU>`
+        is set, then generate a remote control key
+	release. This message is always passed on to the follower(s).
+    * .. _`CEC-MSG-REPORT-PHYSICAL-ADDR`:
+
+      - ``CEC_MSG_REPORT_PHYSICAL_ADDR``
+      - The CEC framework will make note of the reported physical address
+	and then just pass the message on to the follower(s).
+
+
+
+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.
+
+The :ref:`ioctl CEC_S_MODE <CEC_S_MODE>` can return the following
+error codes:
+
+EINVAL
+    The requested mode is invalid.
+
+EPERM
+    Monitor mode is requested without having root permissions
+
+EBUSY
+    Someone else is already an exclusive follower or initiator.
diff --git a/Documentation/media/uapi/cec/cec-ioc-receive.rst b/Documentation/media/uapi/cec/cec-ioc-receive.rst
new file mode 100644
index 000000000000..bdad4b197bcd
--- /dev/null
+++ b/Documentation/media/uapi/cec/cec-ioc-receive.rst
@@ -0,0 +1,344 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _CEC_TRANSMIT:
+.. _CEC_RECEIVE:
+
+***********************************
+ioctls CEC_RECEIVE and CEC_TRANSMIT
+***********************************
+
+Name
+====
+
+CEC_RECEIVE, CEC_TRANSMIT - Receive or transmit a CEC message
+
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_RECEIVE, struct cec_msg *argp )
+    :name: CEC_RECEIVE
+
+.. c:function:: int ioctl( int fd, CEC_TRANSMIT, struct cec_msg *argp )
+    :name: CEC_TRANSMIT
+
+Arguments
+=========
+
+``fd``
+    File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+    Pointer to struct cec_msg.
+
+Description
+===========
+
+To receive a CEC message the application has to fill in the
+``timeout`` field of struct :c:type:`cec_msg` and pass it to
+:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+If the file descriptor is in non-blocking mode and there are no received
+messages pending, then it will return -1 and set errno to the ``EAGAIN``
+error code. If the file descriptor is in blocking mode and ``timeout``
+is non-zero and no message arrived within ``timeout`` milliseconds, then
+it will return -1 and set errno to the ``ETIMEDOUT`` error code.
+
+A received message can be:
+
+1. a message received from another CEC device (the ``sequence`` field will
+   be 0).
+2. the result of an earlier non-blocking transmit (the ``sequence`` field will
+   be non-zero).
+
+To send a CEC message the application has to fill in the struct
+:c:type:`cec_msg` and pass it to :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`.
+The :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is only available if
+``CEC_CAP_TRANSMIT`` is set. If there is no more room in the transmit
+queue, then it will return -1 and set errno to the ``EBUSY`` error code.
+The transmit queue has enough room for 18 messages (about 1 second worth
+of 2-byte messages). Note that the CEC kernel framework will also reply
+to core messages (see :ref:`cec-core-processing`), so it is not a good
+idea to fully fill up the transmit queue.
+
+If the file descriptor is in non-blocking mode then the transmit will
+return 0 and the result of the transmit will be available via
+:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` once the transmit has finished
+(including waiting for a reply, if requested).
+
+The ``sequence`` field is filled in for every transmit and this can be
+checked against the received messages to find the corresponding transmit
+result.
+
+Normally calling :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` when the physical
+address is invalid (due to e.g. a disconnect) will return ``ENONET``.
+
+However, the CEC specification allows sending messages from 'Unregistered' to
+'TV' when the physical address is invalid since some TVs pull the hotplug detect
+pin of the HDMI connector low when they go into standby, or when switching to
+another input.
+
+When the hotplug detect pin goes low the EDID disappears, and thus the
+physical address, but the cable is still connected and CEC still works.
+In order to detect/wake up the device it is allowed to send poll and 'Image/Text
+View On' messages from initiator 0xf ('Unregistered') to destination 0 ('TV').
+
+.. tabularcolumns:: |p{1.0cm}|p{3.5cm}|p{13.0cm}|
+
+.. c:type:: cec_msg
+
+.. cssclass:: longtable
+
+.. flat-table:: struct cec_msg
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 16
+
+    * - __u64
+      - ``tx_ts``
+      - Timestamp in ns of when the last byte of the message was transmitted.
+	The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock. To access
+	the same clock from userspace use :c:func:`clock_gettime`.
+    * - __u64
+      - ``rx_ts``
+      - Timestamp in ns of when the last byte of the message was received.
+	The timestamp has been taken from the ``CLOCK_MONOTONIC`` clock. To access
+	the same clock from userspace use :c:func:`clock_gettime`.
+    * - __u32
+      - ``len``
+      - The length of the message. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` this is filled in
+	by the application. The driver will fill this in for
+	:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` it will be
+	filled in by the driver with the length of the reply message if ``reply`` was set.
+    * - __u32
+      - ``timeout``
+      - The timeout in milliseconds. This is the time the device will wait
+	for a message to be received before timing out. If it is set to 0,
+	then it will wait indefinitely when it is called by :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+	If it is 0 and it is called by :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`,
+	then it will be replaced by 1000 if the ``reply`` is non-zero or
+	ignored if ``reply`` is 0.
+    * - __u32
+      - ``sequence``
+      - A non-zero sequence number is automatically assigned by the CEC framework
+	for all transmitted messages. It is used by the CEC framework when it queues
+	the transmit result (when transmit was called in non-blocking mode). This
+	allows the application to associate the received message with the original
+	transmit.
+    * - __u32
+      - ``flags``
+      - Flags. See :ref:`cec-msg-flags` for a list of available flags.
+    * - __u8
+      - ``tx_status``
+      - The status bits of the transmitted message. See
+	:ref:`cec-tx-status` for the possible status values. It is 0 if
+	this message was received, not transmitted.
+    * - __u8
+      - ``msg[16]``
+      - The message payload. For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` this is filled in by the
+	application. The driver will fill this in for :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+	For :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` it will be filled in by the driver with
+	the payload of the reply message if ``timeout`` was set.
+    * - __u8
+      - ``reply``
+      - Wait until this message is replied. If ``reply`` is 0 and the
+	``timeout`` is 0, then don't wait for a reply but return after
+	transmitting the message. Ignored by :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+	The case where ``reply`` is 0 (this is the opcode for the Feature Abort
+	message) and ``timeout`` is non-zero is specifically allowed to make it
+	possible to send a message and wait up to ``timeout`` milliseconds for a
+	Feature Abort reply. In this case ``rx_status`` will either be set
+	to :ref:`CEC_RX_STATUS_TIMEOUT <CEC-RX-STATUS-TIMEOUT>` or
+	:ref:`CEC_RX_STATUS_FEATURE_ABORT <CEC-RX-STATUS-FEATURE-ABORT>`.
+
+	If the transmitter message is ``CEC_MSG_INITIATE_ARC`` then the ``reply``
+	values ``CEC_MSG_REPORT_ARC_INITIATED`` and ``CEC_MSG_REPORT_ARC_TERMINATED``
+	are processed differently: either value will match both possible replies.
+	The reason is that the ``CEC_MSG_INITIATE_ARC`` message is the only CEC
+	message that has two possible replies other than Feature Abort. The
+	``reply`` field will be updated with the actual reply so that it is
+	synchronized with the contents of the received message.
+    * - __u8
+      - ``rx_status``
+      - The status bits of the received message. See
+	:ref:`cec-rx-status` for the possible status values. It is 0 if
+	this message was transmitted, not received, unless this is the
+	reply to a transmitted message. In that case both ``rx_status``
+	and ``tx_status`` are set.
+    * - __u8
+      - ``tx_status``
+      - The status bits of the transmitted message. See
+	:ref:`cec-tx-status` for the possible status values. It is 0 if
+	this message was received, not transmitted.
+    * - __u8
+      - ``tx_arb_lost_cnt``
+      - A counter of the number of transmit attempts that resulted in the
+	Arbitration Lost error. This is only set if the hardware supports
+	this, otherwise it is always 0. This counter is only valid if the
+	:ref:`CEC_TX_STATUS_ARB_LOST <CEC-TX-STATUS-ARB-LOST>` status bit is set.
+    * - __u8
+      - ``tx_nack_cnt``
+      - A counter of the number of transmit attempts that resulted in the
+	Not Acknowledged error. This is only set if the hardware supports
+	this, otherwise it is always 0. This counter is only valid if the
+	:ref:`CEC_TX_STATUS_NACK <CEC-TX-STATUS-NACK>` status bit is set.
+    * - __u8
+      - ``tx_low_drive_cnt``
+      - A counter of the number of transmit attempts that resulted in the
+	Arbitration Lost error. This is only set if the hardware supports
+	this, otherwise it is always 0. This counter is only valid if the
+	:ref:`CEC_TX_STATUS_LOW_DRIVE <CEC-TX-STATUS-LOW-DRIVE>` status bit is set.
+    * - __u8
+      - ``tx_error_cnt``
+      - A counter of the number of transmit errors other than Arbitration
+	Lost or Not Acknowledged. This is only set if the hardware
+	supports this, otherwise it is always 0. This counter is only
+	valid if the :ref:`CEC_TX_STATUS_ERROR <CEC-TX-STATUS-ERROR>` status bit is set.
+
+
+.. tabularcolumns:: |p{6.2cm}|p{1.0cm}|p{10.3cm}|
+
+.. _cec-msg-flags:
+
+.. flat-table:: Flags for struct cec_msg
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 4
+
+    * .. _`CEC-MSG-FL-REPLY-TO-FOLLOWERS`:
+
+      - ``CEC_MSG_FL_REPLY_TO_FOLLOWERS``
+      - 1
+      - If a CEC transmit expects a reply, then by default that reply is only sent to
+	the filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`. If this
+	flag is set, then the reply is also sent to all followers, if any. If the
+	filehandle that called :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` is also a
+	follower, then that filehandle will receive the reply twice: once as the
+	result of the :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>`, and once via
+	:ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>`.
+
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-tx-status:
+
+.. flat-table:: CEC Transmit Status
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-TX-STATUS-OK`:
+
+      - ``CEC_TX_STATUS_OK``
+      - 0x01
+      - The message was transmitted successfully. This is mutually
+	exclusive with :ref:`CEC_TX_STATUS_MAX_RETRIES <CEC-TX-STATUS-MAX-RETRIES>`. Other bits can still
+	be set if earlier attempts met with failure before the transmit
+	was eventually successful.
+    * .. _`CEC-TX-STATUS-ARB-LOST`:
+
+      - ``CEC_TX_STATUS_ARB_LOST``
+      - 0x02
+      - CEC line arbitration was lost.
+    * .. _`CEC-TX-STATUS-NACK`:
+
+      - ``CEC_TX_STATUS_NACK``
+      - 0x04
+      - Message was not acknowledged.
+    * .. _`CEC-TX-STATUS-LOW-DRIVE`:
+
+      - ``CEC_TX_STATUS_LOW_DRIVE``
+      - 0x08
+      - Low drive was detected on the CEC bus. This indicates that a
+	follower detected an error on the bus and requests a
+	retransmission.
+    * .. _`CEC-TX-STATUS-ERROR`:
+
+      - ``CEC_TX_STATUS_ERROR``
+      - 0x10
+      - Some error occurred. This is used for any errors that do not fit
+	``CEC_TX_STATUS_ARB_LOST`` or ``CEC_TX_STATUS_LOW_DRIVE``, either because
+	the hardware could not tell which error occurred, or because the hardware
+	tested for other conditions besides those two.
+    * .. _`CEC-TX-STATUS-MAX-RETRIES`:
+
+      - ``CEC_TX_STATUS_MAX_RETRIES``
+      - 0x20
+      - The transmit failed after one or more retries. This status bit is
+	mutually exclusive with :ref:`CEC_TX_STATUS_OK <CEC-TX-STATUS-OK>`. Other bits can still
+	be set to explain which failures were seen.
+
+
+.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{11.0cm}|
+
+.. _cec-rx-status:
+
+.. flat-table:: CEC Receive Status
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       3 1 16
+
+    * .. _`CEC-RX-STATUS-OK`:
+
+      - ``CEC_RX_STATUS_OK``
+      - 0x01
+      - The message was received successfully.
+    * .. _`CEC-RX-STATUS-TIMEOUT`:
+
+      - ``CEC_RX_STATUS_TIMEOUT``
+      - 0x02
+      - The reply to an earlier transmitted message timed out.
+    * .. _`CEC-RX-STATUS-FEATURE-ABORT`:
+
+      - ``CEC_RX_STATUS_FEATURE_ABORT``
+      - 0x04
+      - The message was received successfully but the reply was
+	``CEC_MSG_FEATURE_ABORT``. This status is only set if this message
+	was the reply to an earlier transmitted message.
+
+
+
+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.
+
+The :ref:`ioctl CEC_RECEIVE <CEC_RECEIVE>` can return the following
+error codes:
+
+EAGAIN
+    No messages are in the receive queue, and the filehandle is in non-blocking mode.
+
+ETIMEDOUT
+    The ``timeout`` was reached while waiting for a message.
+
+ERESTARTSYS
+    The wait for a message was interrupted (e.g. by Ctrl-C).
+
+The :ref:`ioctl CEC_TRANSMIT <CEC_TRANSMIT>` can return the following
+error codes:
+
+ENOTTY
+    The ``CEC_CAP_TRANSMIT`` capability wasn't set, so this ioctl is not supported.
+
+EPERM
+    The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+    has never been called.
+
+ENONET
+    The CEC adapter is not configured, i.e. :ref:`ioctl CEC_ADAP_S_LOG_ADDRS <CEC_ADAP_S_LOG_ADDRS>`
+    was called, but the physical address is invalid so no logical address was claimed.
+    An exception is made in this case for transmits from initiator 0xf ('Unregistered')
+    to destination 0 ('TV'). In that case the transmit will proceed as usual.
+
+EBUSY
+    Another filehandle is in exclusive follower or initiator mode, or the filehandle
+    is in mode ``CEC_MODE_NO_INITIATOR``. This is also returned if the transmit
+    queue is full.
+
+EINVAL
+    The contents of struct :c:type:`cec_msg` is invalid.
+
+ERESTARTSYS
+    The wait for a successful transmit was interrupted (e.g. by Ctrl-C).
diff --git a/MAINTAINERS b/MAINTAINERS
index 443bc975b562..225ab2c1d35b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2674,6 +2674,22 @@ F:	drivers/net/ieee802154/cc2520.c
 F:	include/linux/spi/cc2520.h
 F:	Documentation/devicetree/bindings/net/ieee802154/cc2520.txt
 
+CEC FRAMEWORK
+M:	Hans Verkuil <hans.verkuil@cisco.com>
+L:	linux-media@vger.kernel.org
+T:	git git://linuxtv.org/media_tree.git
+W:	http://linuxtv.org
+S:	Supported
+F:	Documentation/media/kapi/cec-core.rst
+F:	Documentation/media/uapi/cec
+F:	drivers/media/cec/
+F:	drivers/media/rc/keymaps/rc-cec.c
+F:	include/media/cec.h
+F:	include/media/cec-notifier.h
+F:	include/uapi/linux/cec.h
+F:	include/uapi/linux/cec-funcs.h
+F:	Documentation/devicetree/bindings/media/cec.txt
+
 CELL BROADBAND ENGINE ARCHITECTURE
 M:	Arnd Bergmann <arnd@arndb.de>
 L:	linuxppc-dev@lists.ozlabs.org
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c
index 8c75a51333b2..4f5d382268f7 100644
--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -202,7 +202,10 @@ static void cec_queue_msg_fh(struct cec_fh *fh, const struct cec_msg *msg)
 {
 	static const struct cec_event ev_lost_msgs = {
 		.event = CEC_EVENT_LOST_MSGS,
-		.lost_msgs.lost_msgs = 1,
+		.flags = 0,
+		{
+			.lost_msgs = { 1 },
+		},
 	};
 	struct cec_msg_entry *entry;
 
@@ -1793,6 +1796,9 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 	int la_idx = cec_log_addr2idx(adap, dest_laddr);
 	bool from_unregistered = init_laddr == 0xf;
 	struct cec_msg tx_cec_msg = { };
+#ifdef CONFIG_MEDIA_CEC_RC
+	int scancode;
+#endif
 
 	dprintk(2, "%s: %*ph\n", __func__, msg->len, msg->msg);
 
@@ -1888,11 +1894,9 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 		 */
 		case 0x60:
 			if (msg->len == 2)
-				rc_keydown(adap->rc, RC_TYPE_CEC,
-					   msg->msg[2], 0);
+				scancode = msg->msg[2];
 			else
-				rc_keydown(adap->rc, RC_TYPE_CEC,
-					   msg->msg[2] << 8 | msg->msg[3], 0);
+				scancode = msg->msg[2] << 8 | msg->msg[3];
 			break;
 		/*
 		 * Other function messages that are not handled.
@@ -1905,11 +1909,54 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 		 */
 		case 0x56: case 0x57:
 		case 0x67: case 0x68: case 0x69: case 0x6a:
+			scancode = -1;
 			break;
 		default:
-			rc_keydown(adap->rc, RC_TYPE_CEC, msg->msg[2], 0);
+			scancode = msg->msg[2];
+			break;
+		}
+
+		/* Was repeating, but keypress timed out */
+		if (adap->rc_repeating && !adap->rc->keypressed) {
+			adap->rc_repeating = false;
+			adap->rc_last_scancode = -1;
+		}
+		/* Different keypress from last time, ends repeat mode */
+		if (adap->rc_last_scancode != scancode) {
+			rc_keyup(adap->rc);
+			adap->rc_repeating = false;
+		}
+		/* We can't handle this scancode */
+		if (scancode < 0) {
+			adap->rc_last_scancode = scancode;
+			break;
+		}
+
+		/* Send key press */
+		rc_keydown(adap->rc, RC_TYPE_CEC, scancode, 0);
+
+		/* When in repeating mode, we're done */
+		if (adap->rc_repeating)
+			break;
+
+		/*
+		 * We are not repeating, but the new scancode is
+		 * the same as the last one, and this second key press is
+		 * within 550 ms (the 'Follower Safety Timeout') from the
+		 * previous key press, so we now enable the repeating mode.
+		 */
+		if (adap->rc_last_scancode == scancode &&
+		    msg->rx_ts - adap->rc_last_keypress < 550 * NSEC_PER_MSEC) {
+			adap->rc_repeating = true;
 			break;
 		}
+		/*
+		 * Not in repeating mode, so avoid triggering repeat mode
+		 * by calling keyup.
+		 */
+		rc_keyup(adap->rc);
+		adap->rc_last_scancode = scancode;
+		adap->rc_last_keypress = msg->rx_ts;
 #endif
 		break;
 
@@ -1919,6 +1966,8 @@ static int cec_receive_notify(struct cec_adapter *adap, struct cec_msg *msg,
 			break;
 #ifdef CONFIG_MEDIA_CEC_RC
 		rc_keyup(adap->rc);
+		adap->rc_repeating = false;
+		adap->rc_last_scancode = -1;
 #endif
 		break;
 
diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c
index 969f770acf77..65d763be4385 100644
--- a/drivers/media/cec/cec-core.c
+++ b/drivers/media/cec/cec-core.c
@@ -263,7 +263,7 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
 		return adap;
 
 	/* Prepare the RC input device */
-	adap->rc = rc_allocate_device(RC_DRIVER_SCANCODE);
+	adap->rc = rc_allocate_device();
 	if (!adap->rc) {
 		pr_err("cec-%s: failed to allocate memory for rc_dev\n",
 		       name);
@@ -283,11 +283,13 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
 	adap->rc->input_id.vendor = 0;
 	adap->rc->input_id.product = 0;
 	adap->rc->input_id.version = 1;
+	adap->rc->driver_type = RC_DRIVER_SCANCODE;
 	adap->rc->driver_name = CEC_NAME;
 	adap->rc->allowed_protocols = RC_BIT_CEC;
 	adap->rc->priv = adap;
 	adap->rc->map_name = RC_MAP_CEC;
 	adap->rc->timeout = MS_TO_NS(100);
+	adap->rc_last_scancode = -1;
 #endif
 	return adap;
 }
@@ -319,6 +321,17 @@ int cec_register_adapter(struct cec_adapter *adap,
 			adap->rc = NULL;
 			return res;
 		}
+		/*
+		 * The REP_DELAY for CEC is really the time between the initial
+		 * 'User Control Pressed' message and the second. The first
+		 * keypress is always seen as non-repeating, the second
+		 * (provided it has the same UI Command) will start the 'Press
+		 * and Hold' (aka repeat) behavior. By setting REP_DELAY to the
+		 * same value as REP_PERIOD the expected CEC behavior is
+		 * reproduced.
+		 */
+		adap->rc->input_dev->rep[REP_DELAY] =
+			adap->rc->input_dev->rep[REP_PERIOD];
 	}
 #endif
 
diff --git a/drivers/media/rc/keymaps/Makefile b/drivers/media/rc/keymaps/Makefile
index fbbd3bbcd252..9cffcc61fdca 100644
--- a/drivers/media/rc/keymaps/Makefile
+++ b/drivers/media/rc/keymaps/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_RC_MAP) += rc-adstech-dvb-t-pci.o \
 			rc-behold.o \
 			rc-behold-columbus.o \
 			rc-budget-ci-old.o \
+			rc-cec.o \
 			rc-cinergy-1400.o \
 			rc-cinergy.o \
 			rc-delock-61959.o \
diff --git a/drivers/media/rc/keymaps/rc-cec.c b/drivers/media/rc/keymaps/rc-cec.c
new file mode 100644
index 000000000000..354c8e724b8e
--- /dev/null
+++ b/drivers/media/rc/keymaps/rc-cec.c
@@ -0,0 +1,182 @@
+/* Keytable for the CEC remote control
+ *
+ * Copyright (c) 2015 by Kamil Debski
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <media/rc-map.h>
+#include <linux/module.h>
+
+/*
+ * CEC Spec "High-Definition Multimedia Interface Specification" can be obtained
+ * here: http://xtreamerdev.googlecode.com/files/CEC_Specs.pdf
+ * The list of control codes is listed in Table 27: User Control Codes p. 95
+ */
+
+static struct rc_map_table cec[] = {
+	{ 0x00, KEY_OK },
+	{ 0x01, KEY_UP },
+	{ 0x02, KEY_DOWN },
+	{ 0x03, KEY_LEFT },
+	{ 0x04, KEY_RIGHT },
+	{ 0x05, KEY_RIGHT_UP },
+	{ 0x06, KEY_RIGHT_DOWN },
+	{ 0x07, KEY_LEFT_UP },
+	{ 0x08, KEY_LEFT_DOWN },
+	{ 0x09, KEY_ROOT_MENU }, /* CEC Spec: Device Root Menu - see Note 2 */
+	/*
+	 * Note 2: This is the initial display that a device shows. It is
+	 * device-dependent and can be, for example, a contents menu, setup
+	 * menu, favorite menu or other menu. The actual menu displayed
+	 * may also depend on the device's current state.
+	 */
+	{ 0x0a, KEY_SETUP },
+	{ 0x0b, KEY_MENU }, /* CEC Spec: Contents Menu */
+	{ 0x0c, KEY_FAVORITES }, /* CEC Spec: Favorite Menu */
+	{ 0x0d, KEY_EXIT },
+	/* 0x0e-0x0f: Reserved */
+	{ 0x10, KEY_MEDIA_TOP_MENU },
+	{ 0x11, KEY_CONTEXT_MENU },
+	/* 0x12-0x1c: Reserved */
+	{ 0x1d, KEY_DIGITS }, /* CEC Spec: select/toggle a Number Entry Mode */
+	{ 0x1e, KEY_NUMERIC_11 },
+	{ 0x1f, KEY_NUMERIC_12 },
+	/* 0x20-0x29: Keys 0 to 9 */
+	{ 0x20, KEY_NUMERIC_0 },
+	{ 0x21, KEY_NUMERIC_1 },
+	{ 0x22, KEY_NUMERIC_2 },
+	{ 0x23, KEY_NUMERIC_3 },
+	{ 0x24, KEY_NUMERIC_4 },
+	{ 0x25, KEY_NUMERIC_5 },
+	{ 0x26, KEY_NUMERIC_6 },
+	{ 0x27, KEY_NUMERIC_7 },
+	{ 0x28, KEY_NUMERIC_8 },
+	{ 0x29, KEY_NUMERIC_9 },
+	{ 0x2a, KEY_DOT },
+	{ 0x2b, KEY_ENTER },
+	{ 0x2c, KEY_CLEAR },
+	/* 0x2d-0x2e: Reserved */
+	{ 0x2f, KEY_NEXT_FAVORITE }, /* CEC Spec: Next Favorite */
+	{ 0x30, KEY_CHANNELUP },
+	{ 0x31, KEY_CHANNELDOWN },
+	{ 0x32, KEY_PREVIOUS }, /* CEC Spec: Previous Channel */
+	{ 0x33, KEY_SOUND }, /* CEC Spec: Sound Select */
+	{ 0x34, KEY_VIDEO }, /* 0x34: CEC Spec: Input Select */
+	{ 0x35, KEY_INFO }, /* CEC Spec: Display Information */
+	{ 0x36, KEY_HELP },
+	{ 0x37, KEY_PAGEUP },
+	{ 0x38, KEY_PAGEDOWN },
+	/* 0x39-0x3f: Reserved */
+	{ 0x40, KEY_POWER },
+	{ 0x41, KEY_VOLUMEUP },
+	{ 0x42, KEY_VOLUMEDOWN },
+	{ 0x43, KEY_MUTE },
+	{ 0x44, KEY_PLAYCD },
+	{ 0x45, KEY_STOPCD },
+	{ 0x46, KEY_PAUSECD },
+	{ 0x47, KEY_RECORD },
+	{ 0x48, KEY_REWIND },
+	{ 0x49, KEY_FASTFORWARD },
+	{ 0x4a, KEY_EJECTCD }, /* CEC Spec: Eject */
+	{ 0x4b, KEY_FORWARD },
+	{ 0x4c, KEY_BACK },
+	{ 0x4d, KEY_STOP_RECORD }, /* CEC Spec: Stop-Record */
+	{ 0x4e, KEY_PAUSE_RECORD }, /* CEC Spec: Pause-Record */
+	/* 0x4f: Reserved */
+	{ 0x50, KEY_ANGLE },
+	{ 0x51, KEY_TV2 },
+	{ 0x52, KEY_VOD }, /* CEC Spec: Video on Demand */
+	{ 0x53, KEY_EPG },
+	{ 0x54, KEY_TIME }, /* CEC Spec: Timer */
+	{ 0x55, KEY_CONFIG },
+	/*
+	 * The following codes are hard to implement at this moment, as they
+	 * carry an additional additional argument. Most likely changes to RC
+	 * framework are necessary.
+	 * For now they are interpreted by the CEC framework as non keycodes
+	 * and are passed as messages enabling user application to parse them.
+	 */
+	/* 0x56: CEC Spec: Select Broadcast Type */
+	/* 0x57: CEC Spec: Select Sound presentation */
+	{ 0x58, KEY_AUDIO_DESC }, /* CEC 2.0 and up */
+	{ 0x59, KEY_WWW }, /* CEC 2.0 and up */
+	{ 0x5a, KEY_3D_MODE }, /* CEC 2.0 and up */
+	/* 0x5b-0x5f: Reserved */
+	{ 0x60, KEY_PLAYCD }, /* CEC Spec: Play Function */
+	{ 0x6005, KEY_FASTFORWARD },
+	{ 0x6006, KEY_FASTFORWARD },
+	{ 0x6007, KEY_FASTFORWARD },
+	{ 0x6015, KEY_SLOW },
+	{ 0x6016, KEY_SLOW },
+	{ 0x6017, KEY_SLOW },
+	{ 0x6009, KEY_FASTREVERSE },
+	{ 0x600a, KEY_FASTREVERSE },
+	{ 0x600b, KEY_FASTREVERSE },
+	{ 0x6019, KEY_SLOWREVERSE },
+	{ 0x601a, KEY_SLOWREVERSE },
+	{ 0x601b, KEY_SLOWREVERSE },
+	{ 0x6020, KEY_REWIND },
+	{ 0x6024, KEY_PLAYCD },
+	{ 0x6025, KEY_PAUSECD },
+	{ 0x61, KEY_PLAYPAUSE }, /* CEC Spec: Pause-Play Function */
+	{ 0x62, KEY_RECORD }, /* Spec: Record Function */
+	{ 0x63, KEY_PAUSE_RECORD }, /* CEC Spec: Pause-Record Function */
+	{ 0x64, KEY_STOPCD }, /* CEC Spec: Stop Function */
+	{ 0x65, KEY_MUTE }, /* CEC Spec: Mute Function */
+	{ 0x66, KEY_UNMUTE }, /* CEC Spec: Restore the volume */
+	/*
+	 * The following codes are hard to implement at this moment, as they
+	 * carry an additional additional argument. Most likely changes to RC
+	 * framework are necessary.
+	 * For now they are interpreted by the CEC framework as non keycodes
+	 * and are passed as messages enabling user application to parse them.
+	 */
+	/* 0x67: CEC Spec: Tune Function */
+	/* 0x68: CEC Spec: Seleect Media Function */
+	/* 0x69: CEC Spec: Select A/V Input Function */
+	/* 0x6a: CEC Spec: Select Audio Input Function */
+	{ 0x6b, KEY_POWER }, /* CEC Spec: Power Toggle Function */
+	{ 0x6c, KEY_SLEEP }, /* CEC Spec: Power Off Function */
+	{ 0x6d, KEY_WAKEUP }, /* CEC Spec: Power On Function */
+	/* 0x6e-0x70: Reserved */
+	{ 0x71, KEY_BLUE }, /* CEC Spec: F1 (Blue) */
+	{ 0x72, KEY_RED }, /* CEC Spec: F2 (Red) */
+	{ 0x73, KEY_GREEN }, /* CEC Spec: F3 (Green) */
+	{ 0x74, KEY_YELLOW }, /* CEC Spec: F4 (Yellow) */
+	{ 0x75, KEY_F5 },
+	{ 0x76, KEY_DATA }, /* CEC Spec: Data - see Note 3 */
+	/*
+	 * Note 3: This is used, for example, to enter or leave a digital TV
+	 * data broadcast application.
+	 */
+	/* 0x77-0xff: Reserved */
+};
+
+static struct rc_map_list cec_map = {
+	.map = {
+		.scan		= cec,
+		.size		= ARRAY_SIZE(cec),
+		.rc_type	= RC_TYPE_CEC,
+		.name		= RC_MAP_CEC,
+	}
+};
+
+static int __init init_rc_map_cec(void)
+{
+	return rc_map_register(&cec_map);
+}
+
+static void __exit exit_rc_map_cec(void)
+{
+	rc_map_unregister(&cec_map);
+}
+
+module_init(init_rc_map_cec);
+module_exit(exit_rc_map_cec);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kamil Debski");
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 3f0f71adabb4..a639ea653c7e 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -801,6 +801,7 @@ static struct {
 	{ RC_BIT_SHARP,		"sharp"		},
 	{ RC_BIT_MCE_KBD,	"mce_kbd"	},
 	{ RC_BIT_XMP,		"xmp"		},
+	{ RC_BIT_CEC,		"cec"		},
 };
 
 /**
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index a52ca5cba015..b0b96fc01da3 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -57,6 +57,7 @@
 #include <linux/i2c-dev.h>
 #include <linux/atalk.h>
 #include <linux/gfp.h>
+#include <linux/cec.h>
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_sock.h>
@@ -1381,6 +1382,17 @@ COMPATIBLE_IOCTL(VIDEO_GET_NAVI)
 COMPATIBLE_IOCTL(VIDEO_SET_ATTRIBUTES)
 COMPATIBLE_IOCTL(VIDEO_GET_SIZE)
 COMPATIBLE_IOCTL(VIDEO_GET_FRAME_RATE)
+/* cec */
+COMPATIBLE_IOCTL(CEC_ADAP_G_CAPS)
+COMPATIBLE_IOCTL(CEC_ADAP_G_LOG_ADDRS)
+COMPATIBLE_IOCTL(CEC_ADAP_S_LOG_ADDRS)
+COMPATIBLE_IOCTL(CEC_ADAP_G_PHYS_ADDR)
+COMPATIBLE_IOCTL(CEC_ADAP_S_PHYS_ADDR)
+COMPATIBLE_IOCTL(CEC_G_MODE)
+COMPATIBLE_IOCTL(CEC_S_MODE)
+COMPATIBLE_IOCTL(CEC_TRANSMIT)
+COMPATIBLE_IOCTL(CEC_RECEIVE)
+COMPATIBLE_IOCTL(CEC_DQEVENT)
 
 /* joystick */
 COMPATIBLE_IOCTL(JSIOCGVERSION)
diff --git a/include/media/cec-notifier.h b/include/media/cec-notifier.h
index ca19a9305782..8bb169ac7afd 100644
--- a/include/media/cec-notifier.h
+++ b/include/media/cec-notifier.h
@@ -91,6 +91,14 @@ void cec_notifier_register(struct cec_notifier *n,
  */
 void cec_notifier_unregister(struct cec_notifier *n);
 
+/**
+ * cec_register_cec_notifier - register the notifier with the cec adapter.
+ * @adap: the CEC adapter
+ * @notifier: the CEC notifier
+ */
+void cec_register_cec_notifier(struct cec_adapter *adap,
+			       struct cec_notifier *notifier);
+
 #else
 static inline struct cec_notifier *cec_notifier_get(struct device *dev)
 {
@@ -111,6 +119,20 @@ static inline void cec_notifier_set_phys_addr_from_edid(struct cec_notifier *n,
 {
 }
 
+static inline void cec_notifier_register(struct cec_notifier *n,
+			 struct cec_adapter *adap,
+			 void (*callback)(struct cec_adapter *adap, u16 pa))
+{
+}
+
+static inline void cec_notifier_unregister(struct cec_notifier *n)
+{
+}
+
+static inline void cec_register_cec_notifier(struct cec_adapter *adap,
+					     struct cec_notifier *notifier)
+{
+}
 #endif
 
 /**
diff --git a/include/media/cec.h b/include/media/cec.h
index df3c94f05aa5..f64807a78064 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -31,6 +31,9 @@
 #include <media/rc-core.h>
 #include <media/cec-notifier.h>
 
+#define CEC_CAP_DEFAULTS (CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT | \
+			  CEC_CAP_PASSTHROUGH | CEC_CAP_RC)
+
 /**
  * struct cec_devnode - cec device node
  * @dev:	cec device
@@ -188,6 +191,11 @@ struct cec_adapter {
 
 	u32 tx_timeouts;
 
+#ifdef CONFIG_MEDIA_CEC_RC
+	bool rc_repeating;
+	int rc_last_scancode;
+	u64 rc_last_keypress;
+#endif
 #ifdef CONFIG_CEC_NOTIFIER
 	struct cec_notifier *notifier;
 #endif
@@ -226,7 +234,7 @@ static inline bool cec_is_sink(const struct cec_adapter *adap)
 
 struct edid;
 
-#if IS_ENABLED(CONFIG_CEC_CORE)
+#if IS_REACHABLE(CONFIG_CEC_CORE)
 struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
 		void *priv, const char *name, u32 caps, u8 available_las);
 int cec_register_adapter(struct cec_adapter *adap, struct device *parent);
@@ -373,11 +381,6 @@ u16 cec_phys_addr_for_input(u16 phys_addr, u8 input);
  */
 int cec_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port);
 
-#ifdef CONFIG_CEC_NOTIFIER
-void cec_register_cec_notifier(struct cec_adapter *adap,
-			       struct cec_notifier *notifier);
-#endif
-
 #else
 
 static inline int cec_register_adapter(struct cec_adapter *adap,
@@ -424,9 +427,26 @@ static inline u16 cec_phys_addr_for_input(u16 phys_addr, u8 input)
 
 static inline int cec_phys_addr_validate(u16 phys_addr, u16 *parent, u16 *port)
 {
+	if (parent)
+		*parent = phys_addr;
+	if (port)
+		*port = 0;
 	return 0;
 }
 
 #endif
 
+/**
+ * cec_phys_addr_invalidate() - set the physical address to INVALID
+ *
+ * @adap:	the CEC adapter
+ *
+ * This is a simple helper function to invalidate the physical
+ * address.
+ */
+static inline void cec_phys_addr_invalidate(struct cec_adapter *adap)
+{
+	cec_s_phys_addr(adap, CEC_PHYS_ADDR_INVALID, false);
+}
+
 #endif /* _MEDIA_CEC_H */
diff --git a/include/media/rc-map.h b/include/media/rc-map.h
index 7c4bbc4dfab4..d9f87d5b4468 100644
--- a/include/media/rc-map.h
+++ b/include/media/rc-map.h
@@ -31,6 +31,7 @@ enum rc_type {
 	RC_TYPE_RC6_MCE		= 16,	/* MCE (Philips RC6-6A-32 subtype) protocol */
 	RC_TYPE_SHARP		= 17,	/* Sharp protocol */
 	RC_TYPE_XMP		= 18,	/* XMP protocol */
+	RC_TYPE_CEC		= 19,	/* CEC protocol */
 };
 
 #define RC_BIT_NONE		0
@@ -53,6 +54,7 @@ enum rc_type {
 #define RC_BIT_RC6_MCE		(1 << RC_TYPE_RC6_MCE)
 #define RC_BIT_SHARP		(1 << RC_TYPE_SHARP)
 #define RC_BIT_XMP		(1 << RC_TYPE_XMP)
+#define RC_BIT_CEC		(1 << RC_TYPE_CEC)
 
 #define RC_BIT_ALL	(RC_BIT_UNKNOWN | RC_BIT_OTHER | \
 			 RC_BIT_RC5 | RC_BIT_RC5X | RC_BIT_RC5_SZ | \
@@ -61,7 +63,7 @@ enum rc_type {
 			 RC_BIT_NEC | RC_BIT_SANYO | RC_BIT_MCE_KBD | \
 			 RC_BIT_RC6_0 | RC_BIT_RC6_6A_20 | RC_BIT_RC6_6A_24 | \
 			 RC_BIT_RC6_6A_32 | RC_BIT_RC6_MCE | RC_BIT_SHARP | \
-			 RC_BIT_XMP)
+			 RC_BIT_XMP | RC_BIT_CEC)
 
 
 #define RC_SCANCODE_UNKNOWN(x)			(x)
@@ -123,6 +125,7 @@ void rc_map_init(void);
 #define RC_MAP_BEHOLD_COLUMBUS           "rc-behold-columbus"
 #define RC_MAP_BEHOLD                    "rc-behold"
 #define RC_MAP_BUDGET_CI_OLD             "rc-budget-ci-old"
+#define RC_MAP_CEC                       "rc-cec"
 #define RC_MAP_CINERGY_1400              "rc-cinergy-1400"
 #define RC_MAP_CINERGY                   "rc-cinergy"
 #define RC_MAP_DELOCK_61959              "rc-delock-61959"
diff --git a/include/uapi/linux/cec-funcs.h b/include/uapi/linux/cec-funcs.h
index c451eec42a83..270b251a3d9b 100644
--- a/include/uapi/linux/cec-funcs.h
+++ b/include/uapi/linux/cec-funcs.h
@@ -895,6 +895,7 @@ static inline void cec_ops_report_features(const struct cec_msg *msg,
 	*cec_version = msg->msg[2];
 	*all_device_types = msg->msg[3];
 	*rc_profile = p;
+	*dev_features = NULL;
 	while (p < &msg->msg[14] && (*p & CEC_OP_FEAT_EXT))
 		p++;
 	if (!(*p & CEC_OP_FEAT_EXT)) {
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index af6682f5ea85..b9f8df3a0477 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -223,7 +223,7 @@ static inline int cec_msg_status_is_ok(const struct cec_msg *msg)
 #define CEC_LOG_ADDR_BACKUP_2		13
 #define CEC_LOG_ADDR_SPECIFIC		14
 #define CEC_LOG_ADDR_UNREGISTERED	15 /* as initiator address */
-#define CEC_LOG_ADDR_BROADCAST		15 /* ad destination address */
+#define CEC_LOG_ADDR_BROADCAST		15 /* as destination address */
 
 /* The logical address types that the CEC device wants to claim */
 #define CEC_LOG_ADDR_TYPE_TV		0
diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h
index 87cf351bab03..b0c5c4888a4b 100644
--- a/include/uapi/linux/input-event-codes.h
+++ b/include/uapi/linux/input-event-codes.h
@@ -611,6 +611,37 @@
 #define KEY_KBDINPUTASSIST_ACCEPT		0x264
 #define KEY_KBDINPUTASSIST_CANCEL		0x265
 
+/* Diagonal movement keys */
+#define KEY_RIGHT_UP			0x266
+#define KEY_RIGHT_DOWN			0x267
+#define KEY_LEFT_UP			0x268
+#define KEY_LEFT_DOWN			0x269
+
+#define KEY_ROOT_MENU			0x26a /* Show Device's Root Menu */
+/* Show Top Menu of the Media (e.g. DVD) */
+#define KEY_MEDIA_TOP_MENU		0x26b
+#define KEY_NUMERIC_11			0x26c
+#define KEY_NUMERIC_12			0x26d
+/*
+ * Toggle Audio Description: refers to an audio service that helps blind and
+ * visually impaired consumers understand the action in a program. Note: in
+ * some countries this is referred to as "Video Description".
+ */
+#define KEY_AUDIO_DESC			0x26e
+#define KEY_3D_MODE			0x26f
+#define KEY_NEXT_FAVORITE		0x270
+#define KEY_STOP_RECORD			0x271
+#define KEY_PAUSE_RECORD		0x272
+#define KEY_VOD				0x273 /* Video on Demand */
+#define KEY_UNMUTE			0x274
+#define KEY_FASTREVERSE			0x275
+#define KEY_SLOWREVERSE			0x276
+/*
+ * Control a data application associated with the currently viewed channel,
+ * e.g. teletext or data broadcast application (MHEG, MHP, HbbTV, etc.)
+ */
+#define KEY_DATA			0x277
+
 #define BTN_TRIGGER_HAPPY		0x2c0
 #define BTN_TRIGGER_HAPPY1		0x2c0
 #define BTN_TRIGGER_HAPPY2		0x2c1
diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index 2758687300b4..41e8dff588e1 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h
@@ -246,6 +246,7 @@ struct input_mask {
 #define BUS_GSC			0x1A
 #define BUS_ATARI		0x1B
 #define BUS_SPI			0x1C
+#define BUS_CEC			0x1E
 
 /*
  * MT_TOOL types

From 8e3b262321c2121f8ceed952be3619039aebea9d Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Mon, 4 Sep 2017 22:34:22 +0200
Subject: [PATCH] BACKPORT: Pulse Eight HDMI CEC from v4.15

---
 MAINTAINERS                               |   7 +
 drivers/input/serio/serport.c             |  17 +-
 drivers/media/usb/Kconfig                 |   5 +
 drivers/media/usb/Makefile                |   1 +
 drivers/media/usb/pulse8-cec/Kconfig      |  11 +
 drivers/media/usb/pulse8-cec/Makefile     |   1 +
 drivers/media/usb/pulse8-cec/pulse8-cec.c | 757 ++++++++++++++++++++++++++++++
 include/uapi/linux/serio.h                |   1 +
 8 files changed, 797 insertions(+), 3 deletions(-)
 create mode 100644 drivers/media/usb/pulse8-cec/Kconfig
 create mode 100644 drivers/media/usb/pulse8-cec/Makefile
 create mode 100644 drivers/media/usb/pulse8-cec/pulse8-cec.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 225ab2c1d35b..0c1232c326a5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8673,6 +8673,13 @@ F:	include/linux/tracehook.h
 F:	include/uapi/linux/ptrace.h
 F:	kernel/ptrace.c
 
+PULSE8-CEC DRIVER
+M:	Hans Verkuil <hverkuil@xs4all.nl>
+L:	linux-media@vger.kernel.org
+T:	git git://linuxtv.org/media_tree.git
+S:	Maintained
+F:	drivers/media/usb/pulse8-cec/*
+
 PVRUSB2 VIDEO4LINUX DRIVER
 M:	Mike Isely <isely@pobox.com>
 L:	pvrusb2@isely.net	(subscribers-only)
diff --git a/drivers/input/serio/serport.c b/drivers/input/serio/serport.c
index 9c927d35c1f5..d189843f3727 100644
--- a/drivers/input/serio/serport.c
+++ b/drivers/input/serio/serport.c
@@ -71,10 +71,7 @@ static void serport_serio_close(struct serio *serio)
 
 	spin_lock_irqsave(&serport->lock, flags);
 	clear_bit(SERPORT_ACTIVE, &serport->flags);
-	set_bit(SERPORT_DEAD, &serport->flags);
 	spin_unlock_irqrestore(&serport->lock, flags);
-
-	wake_up_interruptible(&serport->wait);
 }
 
 /*
@@ -248,6 +245,19 @@ static long serport_ldisc_compat_ioctl(struct tty_struct *tty,
 }
 #endif
 
+static int serport_ldisc_hangup(struct tty_struct *tty)
+{
+	struct serport *serport = (struct serport *) tty->disc_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&serport->lock, flags);
+	set_bit(SERPORT_DEAD, &serport->flags);
+	spin_unlock_irqrestore(&serport->lock, flags);
+
+	wake_up_interruptible(&serport->wait);
+	return 0;
+}
+
 static void serport_ldisc_write_wakeup(struct tty_struct * tty)
 {
 	struct serport *serport = (struct serport *) tty->disc_data;
@@ -274,6 +284,7 @@ static struct tty_ldisc_ops serport_ldisc = {
 	.compat_ioctl =	serport_ldisc_compat_ioctl,
 #endif
 	.receive_buf =	serport_ldisc_receive,
+	.hangup =	serport_ldisc_hangup,
 	.write_wakeup =	serport_ldisc_write_wakeup
 };
 
diff --git a/drivers/media/usb/Kconfig b/drivers/media/usb/Kconfig
index 7496f332f3f5..c9644b62f91a 100644
--- a/drivers/media/usb/Kconfig
+++ b/drivers/media/usb/Kconfig
@@ -60,5 +60,10 @@ source "drivers/media/usb/hackrf/Kconfig"
 source "drivers/media/usb/msi2500/Kconfig"
 endif
 
+if MEDIA_CEC_SUPPORT
+	comment "USB HDMI CEC adapters"
+source "drivers/media/usb/pulse8-cec/Kconfig"
+endif
+
 endif #MEDIA_USB_SUPPORT
 endif #USB
diff --git a/drivers/media/usb/Makefile b/drivers/media/usb/Makefile
index 8874ba774a34..0f15e3351ddc 100644
--- a/drivers/media/usb/Makefile
+++ b/drivers/media/usb/Makefile
@@ -24,3 +24,4 @@ obj-$(CONFIG_VIDEO_EM28XX) += em28xx/
 obj-$(CONFIG_VIDEO_USBTV) += usbtv/
 obj-$(CONFIG_VIDEO_GO7007) += go7007/
 obj-$(CONFIG_DVB_AS102) += as102/
+obj-$(CONFIG_USB_PULSE8_CEC) += pulse8-cec/
diff --git a/drivers/media/usb/pulse8-cec/Kconfig b/drivers/media/usb/pulse8-cec/Kconfig
new file mode 100644
index 000000000000..18ead44824ba
--- /dev/null
+++ b/drivers/media/usb/pulse8-cec/Kconfig
@@ -0,0 +1,11 @@
+config USB_PULSE8_CEC
+	tristate "Pulse Eight HDMI CEC"
+	depends on USB_ACM
+	select CEC_CORE
+	select SERIO
+	select SERIO_SERPORT
+	---help---
+	  This is a cec driver for the Pulse Eight HDMI CEC device.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called pulse8-cec.
diff --git a/drivers/media/usb/pulse8-cec/Makefile b/drivers/media/usb/pulse8-cec/Makefile
new file mode 100644
index 000000000000..9800690bc25a
--- /dev/null
+++ b/drivers/media/usb/pulse8-cec/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_USB_PULSE8_CEC) += pulse8-cec.o
diff --git a/drivers/media/usb/pulse8-cec/pulse8-cec.c b/drivers/media/usb/pulse8-cec/pulse8-cec.c
new file mode 100644
index 000000000000..50146f263d90
--- /dev/null
+++ b/drivers/media/usb/pulse8-cec/pulse8-cec.c
@@ -0,0 +1,757 @@
+/*
+ * Pulse Eight HDMI CEC driver
+ *
+ * Copyright 2016 Hans Verkuil <hverkuil@xs4all.nl
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version of 2 of the License, or (at your
+ * option) any later version. See the file COPYING in the main directory of
+ * this archive for more details.
+ */
+
+/*
+ * Notes:
+ *
+ * - Devices with firmware version < 2 do not store their configuration in
+ *   EEPROM.
+ *
+ * - In autonomous mode, only messages from a TV will be acknowledged, even
+ *   polling messages. Upon receiving a message from a TV, the dongle will
+ *   respond to messages from any logical address.
+ *
+ * - In autonomous mode, the dongle will by default reply Feature Abort
+ *   [Unrecognized Opcode] when it receives Give Device Vendor ID. It will
+ *   however observe vendor ID's reported by other devices and possibly
+ *   alter this behavior. When TV's (and TV's only) report that their vendor ID
+ *   is LG (0x00e091), the dongle will itself reply that it has the same vendor
+ *   ID, and it will respond to at least one vendor specific command.
+ *
+ * - In autonomous mode, the dongle is known to attempt wakeup if it receives
+ *   <User Control Pressed> ["Power On"], ["Power] or ["Power Toggle"], or if it
+ *   receives <Set Stream Path> with its own physical address. It also does this
+ *   if it receives <Vendor Specific Command> [0x03 0x00] from an LG TV.
+ */
+
+#include <linux/completion.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/serio.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+
+#include <media/cec.h>
+
+MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
+MODULE_DESCRIPTION("Pulse Eight HDMI CEC driver");
+MODULE_LICENSE("GPL");
+
+static int debug;
+static int persistent_config;
+module_param(debug, int, 0644);
+module_param(persistent_config, int, 0644);
+MODULE_PARM_DESC(debug, "debug level (0-1)");
+MODULE_PARM_DESC(persistent_config, "read config from persistent memory (0-1)");
+
+enum pulse8_msgcodes {
+	MSGCODE_NOTHING = 0,
+	MSGCODE_PING,
+	MSGCODE_TIMEOUT_ERROR,
+	MSGCODE_HIGH_ERROR,
+	MSGCODE_LOW_ERROR,
+	MSGCODE_FRAME_START,
+	MSGCODE_FRAME_DATA,
+	MSGCODE_RECEIVE_FAILED,
+	MSGCODE_COMMAND_ACCEPTED,	/* 0x08 */
+	MSGCODE_COMMAND_REJECTED,
+	MSGCODE_SET_ACK_MASK,
+	MSGCODE_TRANSMIT,
+	MSGCODE_TRANSMIT_EOM,
+	MSGCODE_TRANSMIT_IDLETIME,
+	MSGCODE_TRANSMIT_ACK_POLARITY,
+	MSGCODE_TRANSMIT_LINE_TIMEOUT,
+	MSGCODE_TRANSMIT_SUCCEEDED,	/* 0x10 */
+	MSGCODE_TRANSMIT_FAILED_LINE,
+	MSGCODE_TRANSMIT_FAILED_ACK,
+	MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA,
+	MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE,
+	MSGCODE_FIRMWARE_VERSION,
+	MSGCODE_START_BOOTLOADER,
+	MSGCODE_GET_BUILDDATE,
+	MSGCODE_SET_CONTROLLED,		/* 0x18 */
+	MSGCODE_GET_AUTO_ENABLED,
+	MSGCODE_SET_AUTO_ENABLED,
+	MSGCODE_GET_DEFAULT_LOGICAL_ADDRESS,
+	MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS,
+	MSGCODE_GET_LOGICAL_ADDRESS_MASK,
+	MSGCODE_SET_LOGICAL_ADDRESS_MASK,
+	MSGCODE_GET_PHYSICAL_ADDRESS,
+	MSGCODE_SET_PHYSICAL_ADDRESS,	/* 0x20 */
+	MSGCODE_GET_DEVICE_TYPE,
+	MSGCODE_SET_DEVICE_TYPE,
+	MSGCODE_GET_HDMI_VERSION,
+	MSGCODE_SET_HDMI_VERSION,
+	MSGCODE_GET_OSD_NAME,
+	MSGCODE_SET_OSD_NAME,
+	MSGCODE_WRITE_EEPROM,
+	MSGCODE_GET_ADAPTER_TYPE,	/* 0x28 */
+	MSGCODE_SET_ACTIVE_SOURCE,
+
+	MSGCODE_FRAME_EOM = 0x80,
+	MSGCODE_FRAME_ACK = 0x40,
+};
+
+#define MSGSTART	0xff
+#define MSGEND		0xfe
+#define MSGESC		0xfd
+#define MSGOFFSET	3
+
+#define DATA_SIZE 256
+
+#define PING_PERIOD	(15 * HZ)
+
+struct pulse8 {
+	struct device *dev;
+	struct serio *serio;
+	struct cec_adapter *adap;
+	unsigned int vers;
+	struct completion cmd_done;
+	struct work_struct work;
+	struct delayed_work ping_eeprom_work;
+	struct cec_msg rx_msg;
+	u8 data[DATA_SIZE];
+	unsigned int len;
+	u8 buf[DATA_SIZE];
+	unsigned int idx;
+	bool escape;
+	bool started;
+	struct mutex config_lock;
+	struct mutex write_lock;
+	bool config_pending;
+	bool restoring_config;
+	bool autonomous;
+};
+
+static void pulse8_ping_eeprom_work_handler(struct work_struct *work);
+
+static void pulse8_irq_work_handler(struct work_struct *work)
+{
+	struct pulse8 *pulse8 =
+		container_of(work, struct pulse8, work);
+
+	switch (pulse8->data[0] & 0x3f) {
+	case MSGCODE_FRAME_DATA:
+		cec_received_msg(pulse8->adap, &pulse8->rx_msg);
+		break;
+	case MSGCODE_TRANSMIT_SUCCEEDED:
+		cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_OK);
+		break;
+	case MSGCODE_TRANSMIT_FAILED_ACK:
+		cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_NACK);
+		break;
+	case MSGCODE_TRANSMIT_FAILED_LINE:
+	case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
+	case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
+		cec_transmit_attempt_done(pulse8->adap, CEC_TX_STATUS_ERROR);
+		break;
+	}
+}
+
+static irqreturn_t pulse8_interrupt(struct serio *serio, unsigned char data,
+				    unsigned int flags)
+{
+	struct pulse8 *pulse8 = serio_get_drvdata(serio);
+
+	if (!pulse8->started && data != MSGSTART)
+		return IRQ_HANDLED;
+	if (data == MSGESC) {
+		pulse8->escape = true;
+		return IRQ_HANDLED;
+	}
+	if (pulse8->escape) {
+		data += MSGOFFSET;
+		pulse8->escape = false;
+	} else if (data == MSGEND) {
+		struct cec_msg *msg = &pulse8->rx_msg;
+
+		if (debug)
+			dev_info(pulse8->dev, "received: %*ph\n",
+				 pulse8->idx, pulse8->buf);
+		pulse8->data[0] = pulse8->buf[0];
+		switch (pulse8->buf[0] & 0x3f) {
+		case MSGCODE_FRAME_START:
+			msg->len = 1;
+			msg->msg[0] = pulse8->buf[1];
+			break;
+		case MSGCODE_FRAME_DATA:
+			if (msg->len == CEC_MAX_MSG_SIZE)
+				break;
+			msg->msg[msg->len++] = pulse8->buf[1];
+			if (pulse8->buf[0] & MSGCODE_FRAME_EOM)
+				schedule_work(&pulse8->work);
+			break;
+		case MSGCODE_TRANSMIT_SUCCEEDED:
+		case MSGCODE_TRANSMIT_FAILED_LINE:
+		case MSGCODE_TRANSMIT_FAILED_ACK:
+		case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
+		case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
+			schedule_work(&pulse8->work);
+			break;
+		case MSGCODE_HIGH_ERROR:
+		case MSGCODE_LOW_ERROR:
+		case MSGCODE_RECEIVE_FAILED:
+		case MSGCODE_TIMEOUT_ERROR:
+			break;
+		case MSGCODE_COMMAND_ACCEPTED:
+		case MSGCODE_COMMAND_REJECTED:
+		default:
+			if (pulse8->idx == 0)
+				break;
+			memcpy(pulse8->data, pulse8->buf, pulse8->idx);
+			pulse8->len = pulse8->idx;
+			complete(&pulse8->cmd_done);
+			break;
+		}
+		pulse8->idx = 0;
+		pulse8->started = false;
+		return IRQ_HANDLED;
+	} else if (data == MSGSTART) {
+		pulse8->idx = 0;
+		pulse8->started = true;
+		return IRQ_HANDLED;
+	}
+
+	if (pulse8->idx >= DATA_SIZE) {
+		dev_dbg(pulse8->dev,
+			"throwing away %d bytes of garbage\n", pulse8->idx);
+		pulse8->idx = 0;
+	}
+	pulse8->buf[pulse8->idx++] = data;
+	return IRQ_HANDLED;
+}
+
+static void pulse8_disconnect(struct serio *serio)
+{
+	struct pulse8 *pulse8 = serio_get_drvdata(serio);
+
+	cec_unregister_adapter(pulse8->adap);
+	cancel_delayed_work_sync(&pulse8->ping_eeprom_work);
+	dev_info(&serio->dev, "disconnected\n");
+	serio_close(serio);
+	serio_set_drvdata(serio, NULL);
+	kfree(pulse8);
+}
+
+static int pulse8_send(struct serio *serio, const u8 *command, u8 cmd_len)
+{
+	int err = 0;
+
+	err = serio_write(serio, MSGSTART);
+	if (err)
+		return err;
+	for (; !err && cmd_len; command++, cmd_len--) {
+		if (*command >= MSGESC) {
+			err = serio_write(serio, MSGESC);
+			if (!err)
+				err = serio_write(serio, *command - MSGOFFSET);
+		} else {
+			err = serio_write(serio, *command);
+		}
+	}
+	if (!err)
+		err = serio_write(serio, MSGEND);
+
+	return err;
+}
+
+static int pulse8_send_and_wait_once(struct pulse8 *pulse8,
+				     const u8 *cmd, u8 cmd_len,
+				     u8 response, u8 size)
+{
+	int err;
+
+	/*dev_info(pulse8->dev, "transmit: %*ph\n", cmd_len, cmd);*/
+	init_completion(&pulse8->cmd_done);
+
+	err = pulse8_send(pulse8->serio, cmd, cmd_len);
+	if (err)
+		return err;
+
+	if (!wait_for_completion_timeout(&pulse8->cmd_done, HZ))
+		return -ETIMEDOUT;
+	if ((pulse8->data[0] & 0x3f) == MSGCODE_COMMAND_REJECTED &&
+	    cmd[0] != MSGCODE_SET_CONTROLLED &&
+	    cmd[0] != MSGCODE_SET_AUTO_ENABLED &&
+	    cmd[0] != MSGCODE_GET_BUILDDATE)
+		return -ENOTTY;
+	if (response &&
+	    ((pulse8->data[0] & 0x3f) != response || pulse8->len < size + 1)) {
+		dev_info(pulse8->dev, "transmit: failed %02x\n",
+			 pulse8->data[0] & 0x3f);
+		return -EIO;
+	}
+	return 0;
+}
+
+static int pulse8_send_and_wait(struct pulse8 *pulse8,
+				const u8 *cmd, u8 cmd_len, u8 response, u8 size)
+{
+	u8 cmd_sc[2];
+	int err;
+
+	mutex_lock(&pulse8->write_lock);
+	err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len, response, size);
+
+	if (err == -ENOTTY) {
+		cmd_sc[0] = MSGCODE_SET_CONTROLLED;
+		cmd_sc[1] = 1;
+		err = pulse8_send_and_wait_once(pulse8, cmd_sc, 2,
+						MSGCODE_COMMAND_ACCEPTED, 1);
+		if (err)
+			goto unlock;
+		err = pulse8_send_and_wait_once(pulse8, cmd, cmd_len,
+						response, size);
+	}
+
+unlock:
+	mutex_unlock(&pulse8->write_lock);
+	return err == -ENOTTY ? -EIO : err;
+}
+
+static int pulse8_setup(struct pulse8 *pulse8, struct serio *serio,
+			struct cec_log_addrs *log_addrs, u16 *pa)
+{
+	u8 *data = pulse8->data + 1;
+	u8 cmd[2];
+	int err;
+	struct tm tm;
+	time_t date;
+
+	pulse8->vers = 0;
+
+	cmd[0] = MSGCODE_FIRMWARE_VERSION;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
+	if (err)
+		return err;
+	pulse8->vers = (data[0] << 8) | data[1];
+	dev_info(pulse8->dev, "Firmware version %04x\n", pulse8->vers);
+	if (pulse8->vers < 2) {
+		*pa = CEC_PHYS_ADDR_INVALID;
+		return 0;
+	}
+
+	cmd[0] = MSGCODE_GET_BUILDDATE;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 4);
+	if (err)
+		return err;
+	date = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
+	time_to_tm(date, 0, &tm);
+	dev_info(pulse8->dev, "Firmware build date %04ld.%02d.%02d %02d:%02d:%02d\n",
+		 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+		 tm.tm_hour, tm.tm_min, tm.tm_sec);
+
+	dev_dbg(pulse8->dev, "Persistent config:\n");
+	cmd[0] = MSGCODE_GET_AUTO_ENABLED;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+	if (err)
+		return err;
+	pulse8->autonomous = data[0];
+	dev_dbg(pulse8->dev, "Autonomous mode: %s",
+		data[0] ? "on" : "off");
+
+	cmd[0] = MSGCODE_GET_DEVICE_TYPE;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+	if (err)
+		return err;
+	log_addrs->primary_device_type[0] = data[0];
+	dev_dbg(pulse8->dev, "Primary device type: %d\n", data[0]);
+	switch (log_addrs->primary_device_type[0]) {
+	case CEC_OP_PRIM_DEVTYPE_TV:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TV;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TV;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_RECORD:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_RECORD;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_RECORD;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_TUNER:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_TUNER;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_TUNER;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_PLAYBACK;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_PLAYBACK;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_AUDIOSYSTEM;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_SWITCH:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_SPECIFIC;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
+		break;
+	default:
+		log_addrs->log_addr_type[0] = CEC_LOG_ADDR_TYPE_UNREGISTERED;
+		log_addrs->all_device_types[0] = CEC_OP_ALL_DEVTYPE_SWITCH;
+		dev_info(pulse8->dev, "Unknown Primary Device Type: %d\n",
+			 log_addrs->primary_device_type[0]);
+		break;
+	}
+
+	cmd[0] = MSGCODE_GET_LOGICAL_ADDRESS_MASK;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 2);
+	if (err)
+		return err;
+	log_addrs->log_addr_mask = (data[0] << 8) | data[1];
+	dev_dbg(pulse8->dev, "Logical address ACK mask: %x\n",
+		log_addrs->log_addr_mask);
+	if (log_addrs->log_addr_mask)
+		log_addrs->num_log_addrs = 1;
+
+	cmd[0] = MSGCODE_GET_PHYSICAL_ADDRESS;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+	if (err)
+		return err;
+	*pa = (data[0] << 8) | data[1];
+	dev_dbg(pulse8->dev, "Physical address: %x.%x.%x.%x\n",
+		cec_phys_addr_exp(*pa));
+
+	cmd[0] = MSGCODE_GET_HDMI_VERSION;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 1);
+	if (err)
+		return err;
+	log_addrs->cec_version = data[0];
+	dev_dbg(pulse8->dev, "CEC version: %d\n", log_addrs->cec_version);
+
+	cmd[0] = MSGCODE_GET_OSD_NAME;
+	err = pulse8_send_and_wait(pulse8, cmd, 1, cmd[0], 0);
+	if (err)
+		return err;
+	strncpy(log_addrs->osd_name, data, 13);
+	dev_dbg(pulse8->dev, "OSD name: %s\n", log_addrs->osd_name);
+
+	return 0;
+}
+
+static int pulse8_apply_persistent_config(struct pulse8 *pulse8,
+					  struct cec_log_addrs *log_addrs,
+					  u16 pa)
+{
+	int err;
+
+	err = cec_s_log_addrs(pulse8->adap, log_addrs, false);
+	if (err)
+		return err;
+
+	cec_s_phys_addr(pulse8->adap, pa, false);
+
+	return 0;
+}
+
+static int pulse8_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+	struct pulse8 *pulse8 = cec_get_drvdata(adap);
+	u8 cmd[16];
+	int err;
+
+	cmd[0] = MSGCODE_SET_CONTROLLED;
+	cmd[1] = enable;
+	err = pulse8_send_and_wait(pulse8, cmd, 2,
+				   MSGCODE_COMMAND_ACCEPTED, 1);
+	return enable ? err : 0;
+}
+
+static int pulse8_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
+{
+	struct pulse8 *pulse8 = cec_get_drvdata(adap);
+	u16 mask = 0;
+	u16 pa = adap->phys_addr;
+	u8 cmd[16];
+	int err = 0;
+
+	mutex_lock(&pulse8->config_lock);
+	if (log_addr != CEC_LOG_ADDR_INVALID)
+		mask = 1 << log_addr;
+	cmd[0] = MSGCODE_SET_ACK_MASK;
+	cmd[1] = mask >> 8;
+	cmd[2] = mask & 0xff;
+	err = pulse8_send_and_wait(pulse8, cmd, 3,
+				   MSGCODE_COMMAND_ACCEPTED, 0);
+	if ((err && mask != 0) || pulse8->restoring_config)
+		goto unlock;
+
+	cmd[0] = MSGCODE_SET_AUTO_ENABLED;
+	cmd[1] = log_addr == CEC_LOG_ADDR_INVALID ? 0 : 1;
+	err = pulse8_send_and_wait(pulse8, cmd, 2,
+				   MSGCODE_COMMAND_ACCEPTED, 0);
+	if (err)
+		goto unlock;
+	pulse8->autonomous = cmd[1];
+	if (log_addr == CEC_LOG_ADDR_INVALID)
+		goto unlock;
+
+	cmd[0] = MSGCODE_SET_DEVICE_TYPE;
+	cmd[1] = adap->log_addrs.primary_device_type[0];
+	err = pulse8_send_and_wait(pulse8, cmd, 2,
+				   MSGCODE_COMMAND_ACCEPTED, 0);
+	if (err)
+		goto unlock;
+
+	switch (adap->log_addrs.primary_device_type[0]) {
+	case CEC_OP_PRIM_DEVTYPE_TV:
+		mask = CEC_LOG_ADDR_MASK_TV;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_RECORD:
+		mask = CEC_LOG_ADDR_MASK_RECORD;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_TUNER:
+		mask = CEC_LOG_ADDR_MASK_TUNER;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_PLAYBACK:
+		mask = CEC_LOG_ADDR_MASK_PLAYBACK;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_AUDIOSYSTEM:
+		mask = CEC_LOG_ADDR_MASK_AUDIOSYSTEM;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_SWITCH:
+		mask = CEC_LOG_ADDR_MASK_UNREGISTERED;
+		break;
+	case CEC_OP_PRIM_DEVTYPE_PROCESSOR:
+		mask = CEC_LOG_ADDR_MASK_SPECIFIC;
+		break;
+	default:
+		mask = 0;
+		break;
+	}
+	cmd[0] = MSGCODE_SET_LOGICAL_ADDRESS_MASK;
+	cmd[1] = mask >> 8;
+	cmd[2] = mask & 0xff;
+	err = pulse8_send_and_wait(pulse8, cmd, 3,
+				   MSGCODE_COMMAND_ACCEPTED, 0);
+	if (err)
+		goto unlock;
+
+	cmd[0] = MSGCODE_SET_DEFAULT_LOGICAL_ADDRESS;
+	cmd[1] = log_addr;
+	err = pulse8_send_and_wait(pulse8, cmd, 2,
+				   MSGCODE_COMMAND_ACCEPTED, 0);
+	if (err)
+		goto unlock;
+
+	cmd[0] = MSGCODE_SET_PHYSICAL_ADDRESS;
+	cmd[1] = pa >> 8;
+	cmd[2] = pa & 0xff;
+	err = pulse8_send_and_wait(pulse8, cmd, 3,
+				   MSGCODE_COMMAND_ACCEPTED, 0);
+	if (err)
+		goto unlock;
+
+	cmd[0] = MSGCODE_SET_HDMI_VERSION;
+	cmd[1] = adap->log_addrs.cec_version;
+	err = pulse8_send_and_wait(pulse8, cmd, 2,
+				   MSGCODE_COMMAND_ACCEPTED, 0);
+	if (err)
+		goto unlock;
+
+	if (adap->log_addrs.osd_name[0]) {
+		size_t osd_len = strlen(adap->log_addrs.osd_name);
+		char *osd_str = cmd + 1;
+
+		cmd[0] = MSGCODE_SET_OSD_NAME;
+		strncpy(cmd + 1, adap->log_addrs.osd_name, 13);
+		if (osd_len < 4) {
+			memset(osd_str + osd_len, ' ', 4 - osd_len);
+			osd_len = 4;
+			osd_str[osd_len] = '\0';
+			strcpy(adap->log_addrs.osd_name, osd_str);
+		}
+		err = pulse8_send_and_wait(pulse8, cmd, 1 + osd_len,
+					   MSGCODE_COMMAND_ACCEPTED, 0);
+		if (err)
+			goto unlock;
+	}
+
+unlock:
+	if (pulse8->restoring_config)
+		pulse8->restoring_config = false;
+	else
+		pulse8->config_pending = true;
+	mutex_unlock(&pulse8->config_lock);
+	return err;
+}
+
+static int pulse8_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+				    u32 signal_free_time, struct cec_msg *msg)
+{
+	struct pulse8 *pulse8 = cec_get_drvdata(adap);
+	u8 cmd[2];
+	unsigned int i;
+	int err;
+
+	cmd[0] = MSGCODE_TRANSMIT_IDLETIME;
+	cmd[1] = signal_free_time;
+	err = pulse8_send_and_wait(pulse8, cmd, 2,
+				   MSGCODE_COMMAND_ACCEPTED, 1);
+	cmd[0] = MSGCODE_TRANSMIT_ACK_POLARITY;
+	cmd[1] = cec_msg_is_broadcast(msg);
+	if (!err)
+		err = pulse8_send_and_wait(pulse8, cmd, 2,
+					   MSGCODE_COMMAND_ACCEPTED, 1);
+	cmd[0] = msg->len == 1 ? MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
+	cmd[1] = msg->msg[0];
+	if (!err)
+		err = pulse8_send_and_wait(pulse8, cmd, 2,
+					   MSGCODE_COMMAND_ACCEPTED, 1);
+	if (!err && msg->len > 1) {
+		cmd[0] = msg->len == 2 ? MSGCODE_TRANSMIT_EOM :
+					 MSGCODE_TRANSMIT;
+		cmd[1] = msg->msg[1];
+		err = pulse8_send_and_wait(pulse8, cmd, 2,
+					   MSGCODE_COMMAND_ACCEPTED, 1);
+		for (i = 0; !err && i + 2 < msg->len; i++) {
+			cmd[0] = (i + 2 == msg->len - 1) ?
+				MSGCODE_TRANSMIT_EOM : MSGCODE_TRANSMIT;
+			cmd[1] = msg->msg[i + 2];
+			err = pulse8_send_and_wait(pulse8, cmd, 2,
+						   MSGCODE_COMMAND_ACCEPTED, 1);
+		}
+	}
+
+	return err;
+}
+
+static int pulse8_received(struct cec_adapter *adap, struct cec_msg *msg)
+{
+	return -ENOMSG;
+}
+
+static const struct cec_adap_ops pulse8_cec_adap_ops = {
+	.adap_enable = pulse8_cec_adap_enable,
+	.adap_log_addr = pulse8_cec_adap_log_addr,
+	.adap_transmit = pulse8_cec_adap_transmit,
+	.received = pulse8_received,
+};
+
+static int pulse8_connect(struct serio *serio, struct serio_driver *drv)
+{
+	u32 caps = CEC_CAP_DEFAULTS | CEC_CAP_PHYS_ADDR | CEC_CAP_MONITOR_ALL;
+	struct pulse8 *pulse8;
+	int err = -ENOMEM;
+	struct cec_log_addrs log_addrs = {};
+	u16 pa = CEC_PHYS_ADDR_INVALID;
+
+	pulse8 = kzalloc(sizeof(*pulse8), GFP_KERNEL);
+
+	if (!pulse8)
+		return -ENOMEM;
+
+	pulse8->serio = serio;
+	pulse8->adap = cec_allocate_adapter(&pulse8_cec_adap_ops, pulse8,
+					    dev_name(&serio->dev), caps, 1);
+	err = PTR_ERR_OR_ZERO(pulse8->adap);
+	if (err < 0)
+		goto free_device;
+
+	pulse8->dev = &serio->dev;
+	serio_set_drvdata(serio, pulse8);
+	INIT_WORK(&pulse8->work, pulse8_irq_work_handler);
+	mutex_init(&pulse8->write_lock);
+	mutex_init(&pulse8->config_lock);
+	pulse8->config_pending = false;
+
+	err = serio_open(serio, drv);
+	if (err)
+		goto delete_adap;
+
+	err = pulse8_setup(pulse8, serio, &log_addrs, &pa);
+	if (err)
+		goto close_serio;
+
+	err = cec_register_adapter(pulse8->adap, &serio->dev);
+	if (err < 0)
+		goto close_serio;
+
+	pulse8->dev = &pulse8->adap->devnode.dev;
+
+	if (persistent_config && pulse8->autonomous) {
+		err = pulse8_apply_persistent_config(pulse8, &log_addrs, pa);
+		if (err)
+			goto close_serio;
+		pulse8->restoring_config = true;
+	}
+
+	INIT_DELAYED_WORK(&pulse8->ping_eeprom_work,
+			  pulse8_ping_eeprom_work_handler);
+	schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
+
+	return 0;
+
+close_serio:
+	serio_close(serio);
+delete_adap:
+	cec_delete_adapter(pulse8->adap);
+	serio_set_drvdata(serio, NULL);
+free_device:
+	kfree(pulse8);
+	return err;
+}
+
+static void pulse8_ping_eeprom_work_handler(struct work_struct *work)
+{
+	struct pulse8 *pulse8 =
+		container_of(work, struct pulse8, ping_eeprom_work.work);
+	u8 cmd;
+
+	schedule_delayed_work(&pulse8->ping_eeprom_work, PING_PERIOD);
+	cmd = MSGCODE_PING;
+	pulse8_send_and_wait(pulse8, &cmd, 1,
+			     MSGCODE_COMMAND_ACCEPTED, 0);
+
+	if (pulse8->vers < 2)
+		return;
+
+	mutex_lock(&pulse8->config_lock);
+	if (pulse8->config_pending && persistent_config) {
+		dev_dbg(pulse8->dev, "writing pending config to EEPROM\n");
+		cmd = MSGCODE_WRITE_EEPROM;
+		if (pulse8_send_and_wait(pulse8, &cmd, 1,
+					 MSGCODE_COMMAND_ACCEPTED, 0))
+			dev_info(pulse8->dev, "failed to write pending config to EEPROM\n");
+		else
+			pulse8->config_pending = false;
+	}
+	mutex_unlock(&pulse8->config_lock);
+}
+
+static const struct serio_device_id pulse8_serio_ids[] = {
+	{
+		.type	= SERIO_RS232,
+		.proto	= SERIO_PULSE8_CEC,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, pulse8_serio_ids);
+
+static struct serio_driver pulse8_drv = {
+	.driver		= {
+		.name	= "pulse8-cec",
+	},
+	.description	= "Pulse Eight HDMI CEC driver",
+	.id_table	= pulse8_serio_ids,
+	.interrupt	= pulse8_interrupt,
+	.connect	= pulse8_connect,
+	.disconnect	= pulse8_disconnect,
+};
+
+module_serio_driver(pulse8_drv);
diff --git a/include/uapi/linux/serio.h b/include/uapi/linux/serio.h
index becdd78295cc..4588c66a8df0 100644
--- a/include/uapi/linux/serio.h
+++ b/include/uapi/linux/serio.h
@@ -77,5 +77,6 @@
 #define SERIO_PS2MULT	0x3c
 #define SERIO_TSC40	0x3d
 #define SERIO_WACOM_IV	0x3e
+#define SERIO_PULSE8_CEC	0x40
 
 #endif /* _UAPI_SERIO_H */

From 7f6dbf0df7f833b1d9e8da72365eebffd046e7c7 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Mon, 4 Sep 2017 22:34:24 +0200
Subject: [PATCH] BACKPORT: RainShadow Tech HDMI CEC from v4.15

---
 MAINTAINERS                                       |   7 +
 drivers/media/usb/Kconfig                         |   1 +
 drivers/media/usb/Makefile                        |   1 +
 drivers/media/usb/rainshadow-cec/Kconfig          |  11 +
 drivers/media/usb/rainshadow-cec/Makefile         |   1 +
 drivers/media/usb/rainshadow-cec/rainshadow-cec.c | 384 ++++++++++++++++++++++
 include/uapi/linux/serio.h                        |   1 +
 7 files changed, 406 insertions(+)
 create mode 100644 drivers/media/usb/rainshadow-cec/Kconfig
 create mode 100644 drivers/media/usb/rainshadow-cec/Makefile
 create mode 100644 drivers/media/usb/rainshadow-cec/rainshadow-cec.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 0c1232c326a5..551555a162c3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8912,6 +8912,13 @@ L:	linux-fbdev@vger.kernel.org
 S:	Maintained
 F:	drivers/video/fbdev/aty/aty128fb.c
 
+RAINSHADOW-CEC DRIVER
+M:	Hans Verkuil <hverkuil@xs4all.nl>
+L:	linux-media@vger.kernel.org
+T:	git git://linuxtv.org/media_tree.git
+S:	Maintained
+F:	drivers/media/usb/rainshadow-cec/*
+
 RALINK RT2X00 WIRELESS LAN DRIVER
 P:	rt2x00 project
 M:	Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/media/usb/Kconfig b/drivers/media/usb/Kconfig
index c9644b62f91a..b24e753c4766 100644
--- a/drivers/media/usb/Kconfig
+++ b/drivers/media/usb/Kconfig
@@ -63,6 +63,7 @@ endif
 if MEDIA_CEC_SUPPORT
 	comment "USB HDMI CEC adapters"
 source "drivers/media/usb/pulse8-cec/Kconfig"
+source "drivers/media/usb/rainshadow-cec/Kconfig"
 endif
 
 endif #MEDIA_USB_SUPPORT
diff --git a/drivers/media/usb/Makefile b/drivers/media/usb/Makefile
index 0f15e3351ddc..738b993ec8b0 100644
--- a/drivers/media/usb/Makefile
+++ b/drivers/media/usb/Makefile
@@ -25,3 +25,4 @@ obj-$(CONFIG_VIDEO_USBTV) += usbtv/
 obj-$(CONFIG_VIDEO_GO7007) += go7007/
 obj-$(CONFIG_DVB_AS102) += as102/
 obj-$(CONFIG_USB_PULSE8_CEC) += pulse8-cec/
+obj-$(CONFIG_USB_RAINSHADOW_CEC) += rainshadow-cec/
diff --git a/drivers/media/usb/rainshadow-cec/Kconfig b/drivers/media/usb/rainshadow-cec/Kconfig
new file mode 100644
index 000000000000..030ef01b1ff0
--- /dev/null
+++ b/drivers/media/usb/rainshadow-cec/Kconfig
@@ -0,0 +1,11 @@
+config USB_RAINSHADOW_CEC
+	tristate "RainShadow Tech HDMI CEC"
+	depends on USB_ACM
+	select CEC_CORE
+	select SERIO
+	select SERIO_SERPORT
+	---help---
+	  This is a cec driver for the RainShadow Tech HDMI CEC device.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called rainshadow-cec.
diff --git a/drivers/media/usb/rainshadow-cec/Makefile b/drivers/media/usb/rainshadow-cec/Makefile
new file mode 100644
index 000000000000..a79fbc77e1f7
--- /dev/null
+++ b/drivers/media/usb/rainshadow-cec/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_USB_RAINSHADOW_CEC) += rainshadow-cec.o
diff --git a/drivers/media/usb/rainshadow-cec/rainshadow-cec.c b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
new file mode 100644
index 000000000000..cecdcbcd400c
--- /dev/null
+++ b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
@@ -0,0 +1,384 @@
+/*
+ * RainShadow Tech HDMI CEC driver
+ *
+ * Copyright 2016 Hans Verkuil <hverkuil@xs4all.nl
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version of 2 of the License, or (at your
+ * option) any later version. See the file COPYING in the main directory of
+ * this archive for more details.
+ */
+
+/*
+ * Notes:
+ *
+ * The higher level protocols are currently disabled. This can be added
+ * later, similar to how this is done for the Pulse Eight CEC driver.
+ *
+ * Documentation of the protocol is available here:
+ *
+ * http://rainshadowtech.com/doc/HDMICECtoUSBandRS232v2.0.pdf
+ */
+
+#include <linux/completion.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/serio.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/time.h>
+#include <linux/workqueue.h>
+
+#include <media/cec.h>
+
+MODULE_AUTHOR("Hans Verkuil <hverkuil@xs4all.nl>");
+MODULE_DESCRIPTION("RainShadow Tech HDMI CEC driver");
+MODULE_LICENSE("GPL");
+
+#define DATA_SIZE 256
+
+struct rain {
+	struct device *dev;
+	struct serio *serio;
+	struct cec_adapter *adap;
+	struct completion cmd_done;
+	struct work_struct work;
+
+	/* Low-level ringbuffer, collecting incoming characters */
+	char buf[DATA_SIZE];
+	unsigned int buf_rd_idx;
+	unsigned int buf_wr_idx;
+	unsigned int buf_len;
+	spinlock_t buf_lock;
+
+	/* command buffer */
+	char cmd[DATA_SIZE];
+	unsigned int cmd_idx;
+	bool cmd_started;
+
+	/* reply to a command, only used to store the firmware version */
+	char cmd_reply[DATA_SIZE];
+
+	struct mutex write_lock;
+};
+
+static void rain_process_msg(struct rain *rain)
+{
+	struct cec_msg msg = {};
+	const char *cmd = rain->cmd + 3;
+	int stat = -1;
+
+	for (; *cmd; cmd++) {
+		if (!isxdigit(*cmd))
+			continue;
+		if (isxdigit(cmd[0]) && isxdigit(cmd[1])) {
+			if (msg.len == CEC_MAX_MSG_SIZE)
+				break;
+			if (hex2bin(msg.msg + msg.len, cmd, 1))
+				continue;
+			msg.len++;
+			cmd++;
+			continue;
+		}
+		if (!cmd[1])
+			stat = hex_to_bin(cmd[0]);
+		break;
+	}
+
+	if (rain->cmd[0] == 'R') {
+		if (stat == 1 || stat == 2)
+			cec_received_msg(rain->adap, &msg);
+		return;
+	}
+
+	switch (stat) {
+	case 1:
+		cec_transmit_attempt_done(rain->adap, CEC_TX_STATUS_OK);
+		break;
+	case 2:
+		cec_transmit_attempt_done(rain->adap, CEC_TX_STATUS_NACK);
+		break;
+	default:
+		cec_transmit_attempt_done(rain->adap, CEC_TX_STATUS_LOW_DRIVE);
+		break;
+	}
+}
+
+static void rain_irq_work_handler(struct work_struct *work)
+{
+	struct rain *rain =
+		container_of(work, struct rain, work);
+
+	while (true) {
+		unsigned long flags;
+		char data;
+
+		spin_lock_irqsave(&rain->buf_lock, flags);
+		if (!rain->buf_len) {
+			spin_unlock_irqrestore(&rain->buf_lock, flags);
+			break;
+		}
+
+		data = rain->buf[rain->buf_rd_idx];
+		rain->buf_len--;
+		rain->buf_rd_idx = (rain->buf_rd_idx + 1) & 0xff;
+
+		spin_unlock_irqrestore(&rain->buf_lock, flags);
+
+		if (!rain->cmd_started && data != '?')
+			continue;
+
+		switch (data) {
+		case '\r':
+			rain->cmd[rain->cmd_idx] = '\0';
+			dev_dbg(rain->dev, "received: %s\n", rain->cmd);
+			if (!memcmp(rain->cmd, "REC", 3) ||
+			    !memcmp(rain->cmd, "STA", 3)) {
+				rain_process_msg(rain);
+			} else {
+				strcpy(rain->cmd_reply, rain->cmd);
+				complete(&rain->cmd_done);
+			}
+			rain->cmd_idx = 0;
+			rain->cmd_started = false;
+			break;
+
+		case '\n':
+			rain->cmd_idx = 0;
+			rain->cmd_started = false;
+			break;
+
+		case '?':
+			rain->cmd_idx = 0;
+			rain->cmd_started = true;
+			break;
+
+		default:
+			if (rain->cmd_idx >= DATA_SIZE - 1) {
+				dev_dbg(rain->dev,
+					"throwing away %d bytes of garbage\n", rain->cmd_idx);
+				rain->cmd_idx = 0;
+			}
+			rain->cmd[rain->cmd_idx++] = data;
+			break;
+		}
+	}
+}
+
+static irqreturn_t rain_interrupt(struct serio *serio, unsigned char data,
+				    unsigned int flags)
+{
+	struct rain *rain = serio_get_drvdata(serio);
+
+	if (rain->buf_len == DATA_SIZE) {
+		dev_warn_once(rain->dev, "buffer overflow\n");
+		return IRQ_HANDLED;
+	}
+	spin_lock(&rain->buf_lock);
+	rain->buf_len++;
+	rain->buf[rain->buf_wr_idx] = data;
+	rain->buf_wr_idx = (rain->buf_wr_idx + 1) & 0xff;
+	spin_unlock(&rain->buf_lock);
+	schedule_work(&rain->work);
+	return IRQ_HANDLED;
+}
+
+static void rain_disconnect(struct serio *serio)
+{
+	struct rain *rain = serio_get_drvdata(serio);
+
+	cancel_work_sync(&rain->work);
+	cec_unregister_adapter(rain->adap);
+	dev_info(&serio->dev, "disconnected\n");
+	serio_close(serio);
+	serio_set_drvdata(serio, NULL);
+	kfree(rain);
+}
+
+static int rain_send(struct rain *rain, const char *command)
+{
+	int err = serio_write(rain->serio, '!');
+
+	dev_dbg(rain->dev, "send: %s\n", command);
+	while (!err && *command)
+		err = serio_write(rain->serio, *command++);
+	if (!err)
+		err = serio_write(rain->serio, '~');
+
+	return err;
+}
+
+static int rain_send_and_wait(struct rain *rain,
+			      const char *cmd, const char *reply)
+{
+	int err;
+
+	init_completion(&rain->cmd_done);
+
+	mutex_lock(&rain->write_lock);
+	err = rain_send(rain, cmd);
+	if (err)
+		goto err;
+
+	if (!wait_for_completion_timeout(&rain->cmd_done, HZ)) {
+		err = -ETIMEDOUT;
+		goto err;
+	}
+	if (reply && strncmp(rain->cmd_reply, reply, strlen(reply))) {
+		dev_dbg(rain->dev,
+			 "transmit of '%s': received '%s' instead of '%s'\n",
+			 cmd, rain->cmd_reply, reply);
+		err = -EIO;
+	}
+err:
+	mutex_unlock(&rain->write_lock);
+	return err;
+}
+
+static int rain_setup(struct rain *rain, struct serio *serio,
+			struct cec_log_addrs *log_addrs, u16 *pa)
+{
+	int err;
+
+	err = rain_send_and_wait(rain, "R", "REV");
+	if (err)
+		return err;
+	dev_info(rain->dev, "Firmware version %s\n", rain->cmd_reply + 4);
+
+	err = rain_send_and_wait(rain, "Q 1", "QTY");
+	if (err)
+		return err;
+	err = rain_send_and_wait(rain, "c0000", "CFG");
+	if (err)
+		return err;
+	return rain_send_and_wait(rain, "A F 0000", "ADR");
+}
+
+static int rain_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+	return 0;
+}
+
+static int rain_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
+{
+	struct rain *rain = cec_get_drvdata(adap);
+	u8 cmd[16];
+
+	if (log_addr == CEC_LOG_ADDR_INVALID)
+		log_addr = CEC_LOG_ADDR_UNREGISTERED;
+	snprintf(cmd, sizeof(cmd), "A %x", log_addr);
+	return rain_send_and_wait(rain, cmd, "ADR");
+}
+
+static int rain_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
+				    u32 signal_free_time, struct cec_msg *msg)
+{
+	struct rain *rain = cec_get_drvdata(adap);
+	char cmd[2 * CEC_MAX_MSG_SIZE + 16];
+	unsigned int i;
+	int err;
+
+	if (msg->len == 1) {
+		snprintf(cmd, sizeof(cmd), "x%x", cec_msg_destination(msg));
+	} else {
+		char hex[3];
+
+		snprintf(cmd, sizeof(cmd), "x%x %02x ",
+			 cec_msg_destination(msg), msg->msg[1]);
+		for (i = 2; i < msg->len; i++) {
+			snprintf(hex, sizeof(hex), "%02x", msg->msg[i]);
+			strlcat(cmd, hex, sizeof(cmd));
+		}
+	}
+	mutex_lock(&rain->write_lock);
+	err = rain_send(rain, cmd);
+	mutex_unlock(&rain->write_lock);
+	return err;
+}
+
+static const struct cec_adap_ops rain_cec_adap_ops = {
+	.adap_enable = rain_cec_adap_enable,
+	.adap_log_addr = rain_cec_adap_log_addr,
+	.adap_transmit = rain_cec_adap_transmit,
+};
+
+static int rain_connect(struct serio *serio, struct serio_driver *drv)
+{
+	u32 caps = CEC_CAP_DEFAULTS | CEC_CAP_PHYS_ADDR | CEC_CAP_MONITOR_ALL;
+	struct rain *rain;
+	int err = -ENOMEM;
+	struct cec_log_addrs log_addrs = {};
+	u16 pa = CEC_PHYS_ADDR_INVALID;
+
+	rain = kzalloc(sizeof(*rain), GFP_KERNEL);
+
+	if (!rain)
+		return -ENOMEM;
+
+	rain->serio = serio;
+	rain->adap = cec_allocate_adapter(&rain_cec_adap_ops, rain,
+					  dev_name(&serio->dev), caps, 1);
+	err = PTR_ERR_OR_ZERO(rain->adap);
+	if (err < 0)
+		goto free_device;
+
+	rain->dev = &serio->dev;
+	serio_set_drvdata(serio, rain);
+	INIT_WORK(&rain->work, rain_irq_work_handler);
+	mutex_init(&rain->write_lock);
+	spin_lock_init(&rain->buf_lock);
+
+	err = serio_open(serio, drv);
+	if (err)
+		goto delete_adap;
+
+	err = rain_setup(rain, serio, &log_addrs, &pa);
+	if (err)
+		goto close_serio;
+
+	err = cec_register_adapter(rain->adap, &serio->dev);
+	if (err < 0)
+		goto close_serio;
+
+	rain->dev = &rain->adap->devnode.dev;
+	return 0;
+
+close_serio:
+	serio_close(serio);
+delete_adap:
+	cec_delete_adapter(rain->adap);
+	serio_set_drvdata(serio, NULL);
+free_device:
+	kfree(rain);
+	return err;
+}
+
+static const struct serio_device_id rain_serio_ids[] = {
+	{
+		.type	= SERIO_RS232,
+		.proto	= SERIO_RAINSHADOW_CEC,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, rain_serio_ids);
+
+static struct serio_driver rain_drv = {
+	.driver		= {
+		.name	= "rainshadow-cec",
+	},
+	.description	= "RainShadow Tech HDMI CEC driver",
+	.id_table	= rain_serio_ids,
+	.interrupt	= rain_interrupt,
+	.connect	= rain_connect,
+	.disconnect	= rain_disconnect,
+};
+
+module_serio_driver(rain_drv);
diff --git a/include/uapi/linux/serio.h b/include/uapi/linux/serio.h
index 4588c66a8df0..89b72003fb68 100644
--- a/include/uapi/linux/serio.h
+++ b/include/uapi/linux/serio.h
@@ -78,5 +78,6 @@
 #define SERIO_TSC40	0x3d
 #define SERIO_WACOM_IV	0x3e
 #define SERIO_PULSE8_CEC	0x40
+#define SERIO_RAINSHADOW_CEC	0x41
 
 #endif /* _UAPI_SERIO_H */

From f532f514ca373430332f2733be987335af7ae75c Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Sat, 2 Sep 2017 16:23:11 +0200
Subject: [PATCH] [media] rc/keymaps: initialize rc-cec early

---
 drivers/media/rc/keymaps/rc-cec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/rc/keymaps/rc-cec.c b/drivers/media/rc/keymaps/rc-cec.c
index 354c8e724b8e..fb0c2b1f3814 100644
--- a/drivers/media/rc/keymaps/rc-cec.c
+++ b/drivers/media/rc/keymaps/rc-cec.c
@@ -175,7 +175,7 @@ static void __exit exit_rc_map_cec(void)
 	rc_map_unregister(&cec_map);
 }
 
-module_init(init_rc_map_cec);
+subsys_initcall(init_rc_map_cec);
 module_exit(exit_rc_map_cec);
 
 MODULE_LICENSE("GPL");

From 54c779a399fb852e06f11a03bf03c31090c4b722 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Sat, 2 Sep 2017 16:23:11 +0200
Subject: [PATCH] drm/bridge: dw-hdmi: read edid on hpd event

---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 8cb2cb4e61a6..c045cc0717cd 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2479,6 +2479,7 @@ static void dw_hdmi_bridge_nop(struct drm_bridge *bridge)
 static enum drm_connector_status
 dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
 {
+	enum drm_connector_status status;
 	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
 					     connector);
 
@@ -2488,7 +2489,24 @@ dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
 	dw_hdmi_update_phy_mask(hdmi);
 	mutex_unlock(&hdmi->mutex);
 
-	return hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
+	status = hdmi->phy.ops->read_hpd(hdmi, hdmi->phy.data);
+
+	if (status == connector_status_connected && hdmi->ddc) {
+		struct edid *edid = drm_get_edid(connector, hdmi->ddc);
+		if (edid) {
+			dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
+				edid->width_cm, edid->height_cm);
+
+			hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
+			hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
+			drm_mode_connector_update_edid_property(connector, edid);
+			cec_notifier_set_phys_addr_from_edid(hdmi->cec_notifier, edid);
+			drm_edid_to_eld(connector, edid);
+			kfree(edid);
+		}
+	}
+
+	return status;
 }
 
 static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
@@ -2891,9 +2909,6 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
 			dw_hdmi_update_phy_mask(hdmi);
 		}
 		mutex_unlock(&hdmi->mutex);
-		if (!(phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)))
-			cec_notifier_set_phys_addr(hdmi->cec_notifier,
-						   CEC_PHYS_ADDR_INVALID);
 	}
 
 	check_hdmi_irq(hdmi, intr_stat, phy_int_pol);
