Per email discussion, the following can be used
1)autotest display test extention - like the external display test - https://cs.corp.google.com/chromeos_public/src/third_party/autotest/files/client/cros/multimedia/display_facade_native.py?l=220
OR
2)input playback keys combo -https://cs.corp.google.com/chromeos_public/src/third_party/autotest/files/client/cros/input_playback/
OR
any other method to trigger the display change.

Verification procedure is needed that can verify proper display parameters.

The test can be added to bvt-perbuild and after stabilized - to bvt-cq suite.