chromeos: Turn off displays on suspend

ui/display/chromeos/display_configurator_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/display/chromeos/display_configurator.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 833 matching lines @@
   EXPECT_EQ(
       JoinActions(
           kGrab,
           GetFramebufferAction(small_mode_.size(), &outputs_[0], NULL).c_str(),
           GetCrtcAction(outputs_[0], NULL, gfx::Point(0, 0)).c_str(),
           kUngrab,
           kSync,
           NULL),
       log_->GetActionsAndClear());
   configurator_.ResumeDisplays();
+
+  // Expect the GetFramebuffer and GetCrtc actions to happen twice since we
+  // configure the cached displays on resume to speed things up.
   EXPECT_EQ(
       JoinActions(
           kGrab,
           GetFramebufferAction(small_mode_.size(), &outputs_[0], NULL).c_str(),
           GetCrtcAction(outputs_[0], &small_mode_, gfx::Point(0, 0)).c_str(),
+          GetFramebufferAction(small_mode_.size(), &outputs_[0], NULL).c_str(),
+          GetCrtcAction(outputs_[0], &small_mode_, gfx::Point(0, 0)).c_str(),
           kForceDPMS,
           kUngrab,
           NULL),
       log_->GetActionsAndClear());
 
   // Now turn the display off before suspending and check that the
   // configurator turns it back on and syncs with the server.
   configurator_.SetDisplayPower(
       chromeos::DISPLAY_POWER_ALL_OFF,
       DisplayConfigurator::kSetDisplayPowerNoFlags,
@@ skipping 419 matching lines @@
           GetCrtcAction(outputs_[0], NULL, gfx::Point(0, 0)).c_str(),
           kUngrab,
           kSync,
           NULL),
       log_->GetActionsAndClear());
 
   EXPECT_FALSE(test_api_.TriggerConfigureTimeout());
   EXPECT_EQ(kNoActions, log_->GetActionsAndClear());
 
   configurator_.ResumeDisplays();
+
+  // Expect the GetFramebuffer and GetCrtc actions to happen twice since we
+  // configure the cached displays on resume to speed things up.
   EXPECT_EQ(
       JoinActions(
           kGrab,
           GetFramebufferAction(small_mode_.size(), &outputs_[0], NULL).c_str(),
           GetCrtcAction(outputs_[0], &small_mode_, gfx::Point(0, 0)).c_str(),
+          GetFramebufferAction(small_mode_.size(), &outputs_[0], NULL).c_str(),
+          GetCrtcAction(outputs_[0], &small_mode_, gfx::Point(0, 0)).c_str(),
           kForceDPMS,
           kUngrab,
           NULL),
       log_->GetActionsAndClear());
 }
 
 TEST_F(DisplayConfiguratorTest, ContentProtectionTwoClients) {
   DisplayConfigurator::ContentProtectionClientId client1 =
       configurator_.RegisterContentProtectionClient();
   DisplayConfigurator::ContentProtectionClientId client2 =
@@ skipping 326 matching lines @@
                         GetFramebufferAction(small_mode_.size(), &outputs_[0],
                                              nullptr).c_str(),
                         GetCrtcAction(outputs_[0], &small_mode_,
                                       gfx::Point(0, 0)).c_str(),
                         kUngrab, NULL),
             log_->GetActionsAndClear());
 }
 
 }  // namespace test
 }  // namespace ui