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    SubjectRe: [PATCH v7 1/3] media: cec: expose HDMI connector to CEC dev mapping
    Hi Hans.

    I would like to come back to this thread.

    On Fri, May 24, 2019 at 11:21 AM Hans Verkuil <hverkuil@xs4all.nl> wrote:
    >
    > Hi Dariusz,
    >
    > I did some more testing with the Khadas VIM2 and found another problem,
    > something that will, unfortunately, require some redesign.
    >
    > See my comments below...
    >
    ...
    >
    > Another issue here is that when the HDMI driver removes the notifier,
    > then it should also zero the connector info. Remember that both the
    > HDMI and the CEC drivers can be loaded and unloaded independently from
    > one another.
    >

    I took a peek at the changes in
    https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=cec-conn. Do I
    understand it correctly, that the above problem is addressed there by
    unregistering an adapter in cec_notifier_conn_unregister (which will
    result in /dev/cecX node going away)? I wonder to what degree this
    solves the problem of HDMI and CEC drivers being loaded and unloaded
    independently. It seems that in cases where HDMI driver is unloaded
    and then loaded again, counterintuitively, the /dev/cecX might not
    come back again, is this right, or am I missing something? Also, is it
    guaranteed that adapter drivers won't try to access an adapter once it
    gets removed by cec_notifier_conn_unregister?

    Thank you.

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