[PATCH] drm/udl: Ensure channel is selected before using the device.

on Linux 4.7.0 Signed-off-by: Jamie Lentin --- This ended up in udl_connector_init() since the name suggests it has something to do with configuring which output to use, although a quick search through other displaylink drivers didn't shed any light on what the bytes in set_def_chn actually

[PATCH v2] drm/udl: Ensure channel is selected before using the device.

Lift configuration command from udlfb. This appears to be essential for at least a Rextron VCUD-60, without which no URB communication occurs. Signed-off-by: Jamie Lentin --- udl_encoder_commit() is too late to do this set up in it seems. This setup doesn't need to be performed again af