forked from Minki/linux
[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: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Hans Verkuil
Mauro Carvalho Chehab
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ffbab694ed
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d2cd627be0
@ -64,14 +64,20 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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- __u64
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- ``ts``
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- ``tx_ts``
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- Timestamp of when the message was transmitted in ns in the case of
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:ref:`CEC_TRANSMIT` with ``reply`` set to 0, or the timestamp of the
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received message in all other cases.
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- Timestamp in ns of when the last byte of the message was transmitted.
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- .. row 2
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- __u64
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- ``rx_ts``
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- Timestamp in ns of when the last byte of the message was received.
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- .. row 3
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- __u32
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- ``len``
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@ -81,7 +87,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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:ref:`CEC_RECEIVE` and for :ref:`CEC_TRANSMIT` it will be filled in with
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the length of the reply message if ``reply`` was set.
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- .. row 3
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- .. row 4
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- __u32
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@ -94,7 +100,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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then it will be replaced by 1000 if the ``reply`` is non-zero or
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ignored if ``reply`` is 0.
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- .. row 4
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- .. row 5
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- __u32
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@ -105,7 +111,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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framework to generate an event if a reply for a message was
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requested and the message was transmitted in a non-blocking mode.
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- .. row 5
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- .. row 6
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- __u32
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@ -113,18 +119,6 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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- Flags. No flags are defined yet, so set this to 0.
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- .. row 6
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- __u8
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- ``rx_status``
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- The status bits of the received message. See
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:ref:`cec-rx-status` for the possible status values. It is 0 if
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this message was transmitted, not received, unless this is the
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reply to a transmitted message. In that case both ``rx_status``
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and ``tx_status`` are set.
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- .. row 7
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- __u8
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@ -146,7 +140,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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for :ref:`CEC_TRANSMIT` it will be filled in with the payload of the
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reply message if ``reply`` was set.
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- .. row 9
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- .. row 8
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- __u8
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@ -154,8 +148,8 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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- Wait until this message is replied. If ``reply`` is 0 and the
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``timeout`` is 0, then don't wait for a reply but return after
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transmitting the message. If there was an error as indicated by a
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non-zero ``tx_status`` field, then ``reply`` and ``timeout`` are
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transmitting the message. If there was an error as indicated by the
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``tx_status`` field, then ``reply`` and ``timeout`` are
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both set to 0 by the driver. Ignored by :ref:`CEC_RECEIVE`. The case
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where ``reply`` is 0 (this is the opcode for the Feature Abort
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message) and ``timeout`` is non-zero is specifically allowed to
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@ -163,10 +157,32 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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Feature Abort reply. In this case ``rx_status`` will either be set
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to :ref:`CEC_RX_STATUS_TIMEOUT <CEC-RX-STATUS-TIMEOUT>` or :ref:`CEC_RX_STATUS-FEATURE-ABORT <CEC-RX-STATUS-FEATURE-ABORT>`.
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- .. row 9
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- __u8
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- ``rx_status``
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- The status bits of the received message. See
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:ref:`cec-rx-status` for the possible status values. It is 0 if
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this message was transmitted, not received, unless this is the
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reply to a transmitted message. In that case both ``rx_status``
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and ``tx_status`` are set.
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- .. row 10
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- __u8
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- ``tx_status``
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- The status bits of the transmitted message. See
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:ref:`cec-tx-status` for the possible status values. It is 0 if
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this messages was received, not transmitted.
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- .. row 11
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- __u8
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- ``tx_arb_lost_cnt``
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- A counter of the number of transmit attempts that resulted in the
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@ -174,7 +190,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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this, otherwise it is always 0. This counter is only valid if the
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:ref:`CEC_TX_STATUS_ARB_LOST <CEC-TX-STATUS-ARB-LOST>` status bit is set.
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- .. row 11
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- .. row 12
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- __u8
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@ -185,7 +201,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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this, otherwise it is always 0. This counter is only valid if the
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:ref:`CEC_TX_STATUS_NACK <CEC-TX-STATUS-NACK>` status bit is set.
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- .. row 12
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- .. row 13
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- __u8
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@ -196,7 +212,7 @@ queue, then it will return -1 and set errno to the EBUSY error code.
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this, otherwise it is always 0. This counter is only valid if the
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:ref:`CEC_TX_STATUS_LOW_DRIVE <CEC-TX-STATUS-LOW-DRIVE>` status bit is set.
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- .. row 13
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- .. row 14
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- __u8
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