hwc3: add support for refresh rate indicator callback

This will add support in HWC to expose the refresh rate in panel to SF
using HWC3 callback API so that SF can update the refresh rate overlay
indicator to the actual refresh rate in the panel. HWC will monitor the
panel refresh rate based on some sysfs nodes.

Bug: 267825022
Test: enable refresh rate indicator, wait for idle, AOD
Change-Id: Ibc80d66eae6b21c3cf84d35fa819e97ccc509ede

1 files changed, 25 insertions, 4 deletions

diff --git a/hwc3/impl/HalImpl.cpp b/hwc3/impl/HalImpl.cpp
index fb41a77..e48d390 100644
--- a/hwc3/impl/HalImpl.cpp
+++ b/hwc3/impl/HalImpl.cpp
@@ -99,6 +99,20 @@ void seamlessPossible(hwc2_callback_data_t callbackData, hwc2_display_t hwcDispl
     hal->getEventCallback()->onSeamlessPossible(display);
 }
 
+void refreshRateChangedDebug(hwc2_callback_data_t callbackData, hwc2_display_t hwcDisplay,
+                             hwc2_vsync_period_t hwcVsyncPeriodNanos) {
+    auto hal = static_cast<HalImpl*>(callbackData);
+    int64_t display;
+    int32_t vsyncPeriodNanos;
+
+    h2a::translate(hwcDisplay, display);
+    h2a::translate(hwcVsyncPeriodNanos, vsyncPeriodNanos);
+    hal->getEventCallback()->onRefreshRateChangedDebug(RefreshRateChangedDebugData{
+            .display = display,
+            .vsyncPeriodNanos = vsyncPeriodNanos,
+    });
+}
+
 } // nampesapce hook
 
 HalImpl::HalImpl(std::unique_ptr<ExynosDevice> device) : mDevice(std::move(device)) {
@@ -130,6 +144,7 @@ void HalImpl::initCaps() {
     }
 
     mCaps.insert(Capability::BOOT_DISPLAY_CONFIG);
+    mCaps.insert(Capability::REFRESH_RATE_CHANGED_CALLBACK_DEBUG);
 }
 
 int32_t HalImpl::getHalDisplay(int64_t display, ExynosDisplay*& halDisplay) {
@@ -193,6 +208,9 @@ void HalImpl::registerEventCallback(EventCallback* callback) {
     // register HWC3 Callback
     mDevice->registerHwc3Callback(IComposerCallback::TRANSACTION_onVsyncIdle, this,
                                   reinterpret_cast<hwc2_function_pointer_t>(hook::vsyncIdle));
+    mDevice->registerHwc3Callback(IComposerCallback::TRANSACTION_onRefreshRateChangedDebug, this,
+                                  reinterpret_cast<hwc2_function_pointer_t>(
+                                          hook::refreshRateChangedDebug));
 }
 
 void HalImpl::unregisterEventCallback() {
@@ -204,6 +222,8 @@ void HalImpl::unregisterEventCallback() {
 
     // unregister HWC3 Callback
     mDevice->registerHwc3Callback(IComposerCallback::TRANSACTION_onVsyncIdle, this, nullptr);
+    mDevice->registerHwc3Callback(IComposerCallback::TRANSACTION_onRefreshRateChangedDebug, this,
+                                  nullptr);
 
     mEventCallback = nullptr;
 }
@@ -1064,10 +1084,11 @@ int32_t HalImpl::getDisplayMultiThreadedPresentSupport(const int64_t& display, b
     return halDisplay->getDisplayMultiThreadedPresentSupport(outSupport);
 }
 
-int32_t HalImpl::setRefreshRateChangedCallbackDebugEnabled(int64_t /* display*/,
-                                                           bool /* enabled */) {
-    // TODO(b/267825022) Add implementation for the HAL
-    return EX_UNSUPPORTED_OPERATION;
+int32_t HalImpl::setRefreshRateChangedCallbackDebugEnabled(int64_t display, bool enabled) {
+    ExynosDisplay* halDisplay;
+    RET_IF_ERR(getHalDisplay(display, halDisplay));
+
+    return halDisplay->setRefreshRateChangedCallbackDebugEnabled(enabled);
 }
 
 } // namespace aidl::android::hardware::graphics::composer3::impl