media: cec: rework the cec event handling
Event handling was always fairly simplistic since there were only two events. With the addition of pin events this needed to be redesigned. The state_change and lost_msgs events are now core events with the guarantee that the last state is always available. The new pin events are a queue of events (up to 64 for each event) and the oldest event will be dropped if the application cannot keep up. Lost events are marked with a new event flag. Signed-off-by:Hans Verkuil <hans.verkuil@cisco.com> Reviewed-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab@s-opensource.com>
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