commit 5d1cdad5ca56a64fe4fbb5ad05b187d1a4239628
author Ramkumar Radhakrishnan <ramkumar@codeaurora.org> Tue May 28 13:31:02 2019 -0700
committer Gerrit - the friendly Code Review server <code-review@localhost> Wed Jun 17 11:43:58 2020 -0700
tree 270cb4b2e7ab6af8a07494ffd9aaf540d1eaea46
parent 037e03ad632638c810c3e0998232256b96ea3947

sdm: Disable vsync when display state is poweroff/dozesuspend

Disable vsync when display state is poweroff/dozesuspend and restore
vsync state to its previous state when the display is powered on.

Change-Id: I83569873aa0d082a9ec6d33b7ce5dc8815bd4953

sdm/libs/core/display_base.cpp

diff --git a/sdm/libs/core/display_base.cpp b/sdm/libs/core/display_base.cpp
index 72751e5..ae88e42 100755
--- a/sdm/libs/core/display_base.cpp
+++ b/sdm/libs/core/display_base.cpp
@@ -551,6 +551,15 @@
     return kErrorNone;
   }
 
+  // If vsync is enabled, disable vsync before power off/Doze suspend
+  if (vsync_enable_ && (state == kStateOff || state == kStateDozeSuspend)) {
+    error = SetVSyncState(false);
+    if (error == kErrorNone) {
+      vsync_state_change_pending_ = true;
+      requested_vsync_state_ = true;
+    }
+  }
+
   switch (state) {
   case kStateOff:
     hw_layers_.info.hw_layers.clear();
@@ -605,7 +614,7 @@
     comp_manager_->SetDisplayState(display_comp_ctx_, state, release_fence ? *release_fence : -1);
   }
 
-  if (vsync_state_change_pending_ && (state_ != kStateOff || state_ != kStateStandby)) {
+  if (vsync_state_change_pending_ && (state_ == kStateOn || state_ == kStateDoze)) {
     error = SetVSyncState(requested_vsync_state_);
     if (error != kErrorNone) {
       return error;

sdm/libs/core/display_base.h

diff --git a/sdm/libs/core/display_base.h b/sdm/libs/core/display_base.h
index 4ca6254..eb1c045 100644
--- a/sdm/libs/core/display_base.h
+++ b/sdm/libs/core/display_base.h
@@ -234,6 +234,7 @@
   bool custom_mixer_resolution_ = false;
   DisplayState power_state_pending_ = kStateOff;
   bool vsync_state_change_pending_ = false;
+  // requested_vsync_state: true -> enable vsync, false -> disable vsync
   bool requested_vsync_state_ = false;
   bool defer_power_state_ = false;
   QSyncMode qsync_mode_ = kQSyncModeNone;