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[media] cec: improve dqevent documentation

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The documentation for the cec_event_state_change struct was incomplete.
This patch documents what happens in the corner cases.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2016-08-10 06:00:53 -03:00 committed by Mauro Carvalho Chehab
parent 31dc8b7302
commit 277f963cea
1 changed files with 6 additions and 2 deletions
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8
Documentation/media/uapi/cec/cec-ioc-dqevent.rst
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@ -64,7 +64,8 @@ it is guaranteed that the state did change in between the two events.
- ``phys_addr``
- The current physical address.
- The current physical address. This is ``CEC_PHYS_ADDR_INVALID`` if no
valid physical address is set.
- .. row 2
@ -72,7 +73,10 @@ it is guaranteed that the state did change in between the two events.
- ``log_addr_mask``
- The current set of claimed logical addresses.
- 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.