commit 6693fcb22f483e172140ae27062de48136ca0092
author Padmanabhan Komanduru <pkomandu@codeaurora.org> Fri Nov 22 21:06:52 2019 +0530
committer Gerrit - the friendly Code Review server <code-review@localhost> Mon Dec 16 01:03:14 2019 -0800
tree cb244f5fe0dfac97492469f470fd750203b307bc
parent a6475d2d667471c01283282287e9eb0266e5e8b5

composer: Implement QsyncCallback API

Add change to implement qsync callback API to report change in
qsync enable/disable status and the current refresh rate/qsync
refresh rate to the client.

Change-Id: Iecc2bf9ec7af399a2556e067c92f79b8eab134af
CRs-Fixed: 2572378

composer/hwc_display_builtin.cpp

diff --git a/composer/hwc_display_builtin.cpp b/composer/hwc_display_builtin.cpp
index 439170a..f40bbf4 100644
--- a/composer/hwc_display_builtin.cpp
+++ b/composer/hwc_display_builtin.cpp
@@ -296,6 +296,44 @@
   return HWC2::Error::None;
 }
 
+void HWCDisplayBuiltIn::CacheAvrStatus() {
+  QSyncMode qsync_mode = kQSyncModeNone;
+
+  DisplayError error = display_intf_->GetQSyncMode(&qsync_mode);
+  if (error != kErrorNone) {
+    return;
+  }
+
+  bool qsync_enabled = (qsync_mode != kQSyncModeNone);
+  if (qsync_enabled_ != qsync_enabled) {
+    qsync_reconfigured_ = true;
+    qsync_enabled_ = qsync_enabled;
+  } else {
+    qsync_reconfigured_ = false;
+  }
+}
+
+bool HWCDisplayBuiltIn::IsQsyncCallbackNeeded(bool *qsync_enabled, int32_t *refresh_rate,
+                           int32_t *qsync_refresh_rate) {
+  if (!qsync_reconfigured_) {
+    return false;
+  }
+
+  bool vsync_source = (callbacks_->GetVsyncSource() == id_);
+  // Qsync callback not needed if this display is not the source of vsync
+  if (!vsync_source) {
+    return false;
+  }
+
+  *qsync_enabled = qsync_enabled_;
+  uint32_t current_rate = 0;
+  display_intf_->GetRefreshRate(&current_rate);
+  *refresh_rate = INT32(current_rate);
+  *qsync_refresh_rate = min_refresh_rate_;
+
+  return true;
+}
+
 HWC2::Error HWCDisplayBuiltIn::Present(int32_t *out_retire_fence) {
   auto status = HWC2::Error::None;
 
@@ -310,6 +348,8 @@
       DLOGE("Flush failed. Error = %d", error);
     }
   } else {
+    CacheAvrStatus();
+
     status = CommitStitchLayers();
     if (status != HWC2::Error::None) {
       DLOGE("Stitch failed: %d", status);