Commit d2cd627b authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab

[media] doc-rst: update CEC_RECEIVE

The timestamp field was split into rx_ts and tx_ts, and the rx/tx_status
fields were moved. Update the doc accordingly.

Also fix a bug that stated that a non-zero tx_status field signaled an
error. That's not true, since TX_STATUS_OK is 1, not 0.
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent ffbab694
......@@ -64,14 +64,20 @@ queue, then it will return -1 and set errno to the EBUSY error code.
- __u64
- ``ts``
- ``tx_ts``
- Timestamp of when the message was transmitted in ns in the case of
:ref:`CEC_TRANSMIT` with ``reply`` set to 0, or the timestamp of the
received message in all other cases.
- Timestamp in ns of when the last byte of the message was transmitted.
- .. row 2
- __u64
- ``rx_ts``
- Timestamp in ns of when the last byte of the message was received.
- .. row 3
- __u32
- ``len``
......@@ -81,7 +87,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
:ref:`CEC_RECEIVE` and for :ref:`CEC_TRANSMIT` it will be filled in with
the length of the reply message if ``reply`` was set.
- .. row 3
- .. row 4
- __u32
......@@ -94,7 +100,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
then it will be replaced by 1000 if the ``reply`` is non-zero or
ignored if ``reply`` is 0.
- .. row 4
- .. row 5
- __u32
......@@ -105,7 +111,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
framework to generate an event if a reply for a message was
requested and the message was transmitted in a non-blocking mode.
- .. row 5
- .. row 6
- __u32
......@@ -113,18 +119,6 @@ queue, then it will return -1 and set errno to the EBUSY error code.
- Flags. No flags are defined yet, so set this to 0.
- .. row 6
- __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.
- .. row 7
- __u8
......@@ -146,7 +140,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
for :ref:`CEC_TRANSMIT` it will be filled in with the payload of the
reply message if ``reply`` was set.
- .. row 9
- .. row 8
- __u8
......@@ -154,8 +148,8 @@ queue, then it will return -1 and set errno to the EBUSY error code.
- 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. If there was an error as indicated by a
non-zero ``tx_status`` field, then ``reply`` and ``timeout`` are
transmitting the message. If there was an error as indicated by the
``tx_status`` field, then ``reply`` and ``timeout`` are
both set to 0 by the driver. Ignored by :ref:`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
......@@ -163,10 +157,32 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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>`.
- .. row 9
- __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.
- .. row 10
- __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 messages was received, not transmitted.
- .. row 11
- __u8
- ``tx_arb_lost_cnt``
- A counter of the number of transmit attempts that resulted in the
......@@ -174,7 +190,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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.
- .. row 11
- .. row 12
- __u8
......@@ -185,7 +201,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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.
- .. row 12
- .. row 13
- __u8
......@@ -196,7 +212,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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.
- .. row 13
- .. row 14
- __u8
......
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