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      1 # Copyright 2014 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 """This is a server side test to check no EDID on external display."""
      6 
      7 import logging
      8 
      9 from autotest_lib.client.bin import utils
     10 from autotest_lib.client.common_lib import error
     11 from autotest_lib.client.cros.chameleon import chameleon_port_finder
     12 from autotest_lib.client.cros.chameleon import chameleon_screen_test
     13 from autotest_lib.client.cros.chameleon import edid
     14 from autotest_lib.server import test
     15 from autotest_lib.server.cros.multimedia import remote_facade_factory
     16 
     17 
     18 class display_NoEdid(test.test):
     19     """Server side test to check no EDID on external display.
     20 
     21     This test talks to a Chameleon board and a DUT to set up, run, and verify
     22     the case that no EDID on the external display.
     23     """
     24     version = 1
     25 
     26     STANDARD_MODE_RESOLUTIONS = [(1024, 768), (1024, 720), (800, 600)]
     27 
     28     def run_once(self, host, test_mirrored=False):
     29         factory = remote_facade_factory.RemoteFacadeFactory(host)
     30         display_facade = factory.create_display_facade()
     31         chameleon_board = host.chameleon
     32 
     33         chameleon_board.reset()
     34         finder = chameleon_port_finder.ChameleonVideoInputFinder(
     35                 chameleon_board, display_facade)
     36 
     37         errors = []
     38         for chameleon_port in finder.iterate_all_ports():
     39             screen_test = chameleon_screen_test.ChameleonScreenTest(
     40                     chameleon_port, display_facade, self.outputdir)
     41 
     42             with chameleon_port.use_edid(edid.NO_EDID):
     43                 connector_name = utils.wait_for_value_changed(
     44                             display_facade.get_external_connector_name,
     45                             old_value=False)
     46                 if not connector_name:
     47                     error_message = 'Failed to detect display without an EDID'
     48                     logging.error(error_message)
     49                     errors.append(error_message)
     50                     continue
     51 
     52                 logging.info('Set mirrored: %s', test_mirrored)
     53                 display_facade.set_mirrored(test_mirrored)
     54 
     55                 resolution = display_facade.get_external_resolution()
     56                 if resolution not in self.STANDARD_MODE_RESOLUTIONS:
     57                     error_message = ('Switched to a non-standard mode: %r' %
     58                                      resolution)
     59                     logging.error(error_message)
     60                     errors.append(error_message)
     61                     continue
     62 
     63                 screen_test.test_screen_with_image(
     64                         resolution, test_mirrored, errors)
     65 
     66         if errors:
     67             raise error.TestFail('; '.join(set(errors)))
     68