media: ca.h: document ca_msg and the corresponding ioctls
authorMauro Carvalho Chehab <mchehab@s-opensource.com>
Mon, 4 Sep 2017 12:03:40 +0000 (08:03 -0400)
committerMauro Carvalho Chehab <mchehab@s-opensource.com>
Tue, 5 Sep 2017 10:23:28 +0000 (06:23 -0400)
commit7e6854a9bfea9ed6553acd0204da5101c9a2e6a0
treea9a2a48741c54079d939aba0ba4f0b4e61b5667b
parentbd9049edc66e13e868f819c39844f60443e70817
media: ca.h: document ca_msg and the corresponding ioctls

Usually, CA messages are sent/received via reading/writing at
the CA device node. However, two drivers (dst_ca and firedtv-ci)
also implement it via ioctls.

Apparently, on both cases, the net result is the same.

Anyway, let's document it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Documentation/media/uapi/dvb/ca-get-msg.rst
Documentation/media/uapi/dvb/ca-send-msg.rst
include/uapi/linux/dvb/ca.h