tree 976cf170b3cb8caa811091eea63e208b54fa0045
parent f6cd7daecff558fab2c45d15283d3e52f688342d
author Lyude <cpaul@redhat.com> 1460580618 -0400
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1460725276 +0200

drm/dp/mst: Restore primary hub guid on resume

Some hubs are forgetful, and end up forgetting whatever GUID we set
previously after we do a suspend/resume cycle. This can lead to
hotplugging breaking (along with probably other things) since the hub
will start sending connection notifications with the wrong GUID. As
such, we need to check on resume whether or not the GUID the hub is
giving us is valid.

Signed-off-by: Lyude <cpaul@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1460580618-7421-1-git-send-email-cpaul@redhat.com