• Hans Verkuil's avatar
    [media] cec: add CEC_CAP_NEEDS_HPD · f902c1e9
    Hans Verkuil authored
    Add a new capability CEC_CAP_NEEDS_HPD. If this capability is set
    then the hardware can only use CEC if the HDMI Hotplug Detect pin
    is high. Such hardware cannot handle the corner case in the CEC specification
    where it is possible to transmit messages even if no hotplug signal is
    present (needed for some displays that turn off the HPD when in standby,
    but still have CEC enabled).
    
    Typically hardware that needs this capability have the HPD wired to the CEC
    block, often to a 'power' or 'active' pin.
    Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
    f902c1e9
cec-adap.c 56.3 KB