From 62f51d97bf888b5039a8adc22950b950cf6698ed Mon Sep 17 00:00:00 2001
From: Ady Abraham <adyabr@google.com>
Date: Wed, 24 Aug 2022 22:20:22 +0000
Subject: SF: layers above the frameRateMultipleThreshold should always be
 counted

An additional fix on top of ae2e3c741f0d15d0ed64afd2df93e8c4b2d76cfb
which also include layers that have a desired refresh
rate that was calculated hueristically and matches the max refresh rate.

Change-Id: I85534a3e004f372349dbf923ee6013855a54e4fa
Bug: 242283390
Test: newly added unit tests scenarios
---
 .../Scheduler/RefreshRateConfigs.cpp               | 29 +++++++++++-----------
 .../tests/unittests/RefreshRateConfigsTest.cpp     | 22 +++++++++++++++-
 2 files changed, 36 insertions(+), 15 deletions(-)

diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
index 803eb4f91f..6426478a06 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
@@ -42,9 +42,9 @@ struct RefreshRateScore {
     DisplayModeIterator modeIt;
     float overallScore;
     struct {
-        float belowThreshold;
-        float aboveThreshold;
-    } fixedRateLayersScore;
+        float modeBelowThreshold;
+        float modeAboveThreshold;
+    } fixedRateBelowThresholdLayersScore;
 };
 
 template <typename Iterator>
@@ -385,7 +385,7 @@ auto RefreshRateConfigs::getBestRefreshRateLocked(const std::vector<LayerRequire
 
         const auto weight = layer.weight;
 
-        for (auto& [modeIt, overallScore, fixedRateScore] : scores) {
+        for (auto& [modeIt, overallScore, fixedRateBelowThresholdLayersScore] : scores) {
             const auto& [id, mode] = *modeIt;
             const bool isSeamlessSwitch = mode->getGroup() == mActiveModeIt->second->getGroup();
 
@@ -451,21 +451,22 @@ auto RefreshRateConfigs::getBestRefreshRateLocked(const std::vector<LayerRequire
                         return false;
                 }
             }(layer.vote);
-            const bool layerAboveThreshold = mConfig.frameRateMultipleThreshold != 0 &&
-                    mode->getFps() >= Fps::fromValue(mConfig.frameRateMultipleThreshold) &&
+            const bool layerBelowThreshold = mConfig.frameRateMultipleThreshold != 0 &&
                     layer.desiredRefreshRate <
                             Fps::fromValue(mConfig.frameRateMultipleThreshold / 2);
-            if (fixedSourceLayer) {
-                if (layerAboveThreshold) {
+            const bool modeAboveThreshold = layerBelowThreshold &&
+                    mode->getFps() >= Fps::fromValue(mConfig.frameRateMultipleThreshold);
+            if (fixedSourceLayer && layerBelowThreshold) {
+                if (modeAboveThreshold) {
                     ALOGV("%s gives %s fixed source (above threshold) score of %.4f",
                           formatLayerInfo(layer, weight).c_str(), to_string(mode->getFps()).c_str(),
                           layerScore);
-                    fixedRateScore.aboveThreshold += weightedLayerScore;
+                    fixedRateBelowThresholdLayersScore.modeAboveThreshold += weightedLayerScore;
                 } else {
                     ALOGV("%s gives %s fixed source (below threshold) score of %.4f",
                           formatLayerInfo(layer, weight).c_str(), to_string(mode->getFps()).c_str(),
                           layerScore);
-                    fixedRateScore.belowThreshold += weightedLayerScore;
+                    fixedRateBelowThresholdLayersScore.modeBelowThreshold += weightedLayerScore;
                 }
             } else {
                 ALOGV("%s gives %s score of %.4f", formatLayerInfo(layer, weight).c_str(),
@@ -476,7 +477,7 @@ auto RefreshRateConfigs::getBestRefreshRateLocked(const std::vector<LayerRequire
     }
 
     // We want to find the best refresh rate without the fixed source layers,
-    // so we could know whether we should add the aboveThreshold scores or not.
+    // so we could know whether we should add the modeAboveThreshold scores or not.
     // If the best refresh rate is already above the threshold, it means that
     // some non-fixed source layers already scored it, so we can just add the score
     // for all fixed source layers, even the ones that are above the threshold.
@@ -500,10 +501,10 @@ auto RefreshRateConfigs::getBestRefreshRateLocked(const std::vector<LayerRequire
     }();
 
     // Now we can add the fixed rate layers score
-    for (auto& [modeIt, overallScore, fixedRateScore] : scores) {
-        overallScore += fixedRateScore.belowThreshold;
+    for (auto& [modeIt, overallScore, fixedRateBelowThresholdLayersScore] : scores) {
+        overallScore += fixedRateBelowThresholdLayersScore.modeBelowThreshold;
         if (maxScoreAboveThreshold) {
-            overallScore += fixedRateScore.aboveThreshold;
+            overallScore += fixedRateBelowThresholdLayersScore.modeAboveThreshold;
         }
         ALOGV("%s adjusted overallScore is %.4f", to_string(modeIt->second->getFps()).c_str(),
               overallScore);
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
index 1484bcd12b..188fd58dea 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
@@ -564,9 +564,10 @@ TEST_F(RefreshRateConfigsTest, getBestRefreshRate_30_60_90_120_DifferentTypes_mu
     TestableRefreshRateConfigs configs(kModes_30_60_72_90_120, kModeId60,
                                        {.frameRateMultipleThreshold = 120});
 
-    std::vector<LayerRequirement> layers = {{.weight = 1.f}, {.weight = 1.f}};
+    std::vector<LayerRequirement> layers = {{.weight = 1.f}, {.weight = 1.f}, {.weight = 1.f}};
     auto& lr1 = layers[0];
     auto& lr2 = layers[1];
+    auto& lr3 = layers[2];
 
     lr1.desiredRefreshRate = 24_Hz;
     lr1.vote = LayerVoteType::ExplicitDefault;
@@ -662,6 +663,25 @@ TEST_F(RefreshRateConfigsTest, getBestRefreshRate_30_60_90_120_DifferentTypes_mu
     lr2.vote = LayerVoteType::ExplicitExact;
     lr2.name = "120Hz ExplicitExact";
     EXPECT_EQ(kMode120, configs.getBestRefreshRate(layers));
+
+    lr1.desiredRefreshRate = 10_Hz;
+    lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
+    lr1.name = "30Hz ExplicitExactOrMultiple";
+    lr2.desiredRefreshRate = 120_Hz;
+    lr2.vote = LayerVoteType::Heuristic;
+    lr2.name = "120Hz ExplicitExact";
+    EXPECT_EQ(kMode120, configs.getBestRefreshRate(layers));
+
+    lr1.desiredRefreshRate = 30_Hz;
+    lr1.vote = LayerVoteType::ExplicitExactOrMultiple;
+    lr1.name = "30Hz ExplicitExactOrMultiple";
+    lr2.desiredRefreshRate = 30_Hz;
+    lr2.vote = LayerVoteType::ExplicitExactOrMultiple;
+    lr2.name = "30Hz ExplicitExactOrMultiple";
+    lr3.vote = LayerVoteType::Heuristic;
+    lr3.desiredRefreshRate = 120_Hz;
+    lr3.name = "120Hz Heuristic";
+    EXPECT_EQ(kMode120, configs.getBestRefreshRate(layers));
 }
 
 TEST_F(RefreshRateConfigsTest, getBestRefreshRate_30_60) {
-- 
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