Improve the internal CEC documentation. In particular add a section
that specifies that transmit-related interrupts should be processed
before receive interrupts.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

There are some things there that aren't ok for ReST format.

Fix them.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The CEC kAPI documentation should also be part of the media book.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Document the new HDMI CEC framework.

[k.debski@samsung.com: add DocBook documentation by Hans Verkuil, with
Signed-off-by: NKamil Debski <kamil@wypas.org>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>