hwc3: implement VsyncIdle callback for HWC3

The patch creates the new method to register the HWC3 callback function.
The corresponding VsyncIdle callback function will be called when idle
TE vrefresh is changed in the idle.

Bug: 194068871
Test: switch refresh rates, enable panel idle at 60hz
Change-Id: I4876fdfd341366ca2012a3ce6704a2c8de5866d2

1 files changed, 11 insertions, 7 deletions

diff --git a/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp b/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp
index c3746ef..1836c11 100644
--- a/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp
+++ b/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp
@@ -272,7 +272,7 @@ void ExynosDeviceDrmInterface::ExynosDrmEventHandler::handleTUIEvent() {
 
 constexpr size_t IDLE_ENTER_EVENT_DATA_SIZE = 3;
 void ExynosDeviceDrmInterface::ExynosDrmEventHandler::handleIdleEnterEvent(char const *event) {
-    /* PANEL_IDLE_ENTER=<display id>,<vrefresh>,<idle te vrefresh> */
+    /* PANEL_IDLE_ENTER=<display index>,<vrefresh>,<idle te vrefresh> */
     std::string_view idle_event_str(event);
     auto prefix_shift_pos = idle_event_str.find("=");
     if (prefix_shift_pos == std::string::npos) {
@@ -280,7 +280,9 @@ void ExynosDeviceDrmInterface::ExynosDrmEventHandler::handleIdleEnterEvent(char
     }
 
     int count = 0;
-    int value[IDLE_ENTER_EVENT_DATA_SIZE] = {0}; /* display id, vrefresh, idle_te_vrefresh */
+    int value[IDLE_ENTER_EVENT_DATA_SIZE] = {0};
+    const auto &[displayIndex, vrefresh, idleTeVrefresh] = value;
+
     auto start_pos = prefix_shift_pos + 1;
     auto end_pos = idle_event_str.find(",", start_pos);
     while (end_pos != std::string::npos && count < IDLE_ENTER_EVENT_DATA_SIZE) {
@@ -300,12 +302,14 @@ void ExynosDeviceDrmInterface::ExynosDrmEventHandler::handleIdleEnterEvent(char
         return;
     }
 
-    /* TODO: b/194068871 sending vsyncIdle callback */
-    // if (value[1] != value[2])
-
     ExynosDisplay *primaryDisplay =
-            mExynosDevice->getDisplay(getDisplayId(HWC_DISPLAY_PRIMARY, value[0]));
+            mExynosDevice->getDisplay(getDisplayId(HWC_DISPLAY_PRIMARY, displayIndex));
     if (primaryDisplay) {
-        primaryDisplay->handleDisplayIdleEnter(value[2]);
+        /* sending vsyncIdle callback */
+        if (vrefresh != idleTeVrefresh) {
+            mExynosDevice->onVsyncIdle(primaryDisplay->getId());
+        }
+
+        primaryDisplay->handleDisplayIdleEnter(idleTeVrefresh);
     }
 }