Tune RefreshRateConfigs for fractional refresh rates am: e09237fbc1
Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1953898
Change-Id: Ib63ee14b3a3cdcfae7a3b82f58f0c6f82abf3025
diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
index 73b7b63..ddc05a7 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.cpp
@@ -140,6 +140,8 @@
return 0;
}
+ constexpr float kScoreForFractionalPairs = .8f;
+
// Slightly prefer seamless switches.
constexpr float kSeamedSwitchPenalty = 0.95f;
const float seamlessness = isSeamlessSwitch ? 1.0f : kSeamedSwitchPenalty;
@@ -156,19 +158,29 @@
const auto layerPeriod = layer.desiredRefreshRate.getPeriodNsecs();
if (layer.vote == LayerVoteType::ExplicitDefault) {
// Find the actual rate the layer will render, assuming
- // that layerPeriod is the minimal time to render a frame
+ // that layerPeriod is the minimal period to render a frame.
+ // For example if layerPeriod is 20ms and displayPeriod is 16ms,
+ // then the actualLayerPeriod will be 32ms, because it is the
+ // smallest multiple of the display period which is >= layerPeriod.
auto actualLayerPeriod = displayPeriod;
int multiplier = 1;
while (layerPeriod > actualLayerPeriod + MARGIN_FOR_PERIOD_CALCULATION) {
multiplier++;
actualLayerPeriod = displayPeriod * multiplier;
}
+
+ // Because of the threshold we used above it's possible that score is slightly
+ // above 1.
return std::min(1.0f,
static_cast<float>(layerPeriod) / static_cast<float>(actualLayerPeriod));
}
if (layer.vote == LayerVoteType::ExplicitExactOrMultiple ||
layer.vote == LayerVoteType::Heuristic) {
+ if (isFractionalPairOrMultiple(refreshRate.getFps(), layer.desiredRefreshRate)) {
+ return kScoreForFractionalPairs * seamlessness;
+ }
+
// Calculate how many display vsyncs we need to present a single frame for this
// layer
const auto [displayFramesQuotient, displayFramesRemainder] =
@@ -421,7 +433,7 @@
const auto layerScore =
calculateLayerScoreLocked(layer, *scores[i].refreshRate, isSeamlessSwitch);
- ALOGV("%s gives %s score of %.2f", formatLayerInfo(layer, weight).c_str(),
+ ALOGV("%s gives %s score of %.4f", formatLayerInfo(layer, weight).c_str(),
scores[i].refreshRate->getName().c_str(), layerScore);
scores[i].score += weight * layerScore;
}
@@ -582,7 +594,7 @@
template <typename Iter>
const RefreshRate* RefreshRateConfigs::getBestRefreshRate(Iter begin, Iter end) const {
- constexpr auto EPSILON = 0.001f;
+ constexpr auto kEpsilon = 0.0001f;
const RefreshRate* bestRefreshRate = begin->refreshRate;
float max = begin->score;
for (auto i = begin; i != end; ++i) {
@@ -591,7 +603,7 @@
ATRACE_INT(refreshRate->getName().c_str(), round<int>(score * 100));
- if (score > max * (1 + EPSILON)) {
+ if (score > max * (1 + kEpsilon)) {
max = score;
bestRefreshRate = refreshRate;
}
@@ -924,6 +936,17 @@
return static_cast<int>(numPeriodsRounded);
}
+bool RefreshRateConfigs::isFractionalPairOrMultiple(Fps smaller, Fps bigger) {
+ if (smaller.getValue() > bigger.getValue()) {
+ return isFractionalPairOrMultiple(bigger, smaller);
+ }
+
+ const auto multiplier = std::round(bigger.getValue() / smaller.getValue());
+ constexpr float kCoef = 1000.f / 1001.f;
+ return bigger.equalsWithMargin(Fps(smaller.getValue() * multiplier / kCoef)) ||
+ bigger.equalsWithMargin(Fps(smaller.getValue() * multiplier * kCoef));
+}
+
void RefreshRateConfigs::dump(std::string& result) const {
std::lock_guard lock(mLock);
base::StringAppendF(&result, "DesiredDisplayModeSpecs (DisplayManager): %s\n\n",
diff --git a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
index dfd1395..2157675 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
+++ b/services/surfaceflinger/Scheduler/RefreshRateConfigs.h
@@ -342,6 +342,10 @@
// layer refresh rate.
static int getFrameRateDivider(Fps displayFrameRate, Fps layerFrameRate);
+ // Returns if the provided frame rates have a ratio t*1000/1001 or t*1001/1000
+ // for an integer t.
+ static bool isFractionalPairOrMultiple(Fps, Fps);
+
using UidToFrameRateOverride = std::map<uid_t, Fps>;
// Returns the frame rate override for each uid.
//
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
index 3b2bd81..407f690 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateConfigsTest.cpp
@@ -99,9 +99,15 @@
static inline const DisplayModeId HWC_CONFIG_ID_30 = DisplayModeId(4);
static inline const DisplayModeId HWC_CONFIG_ID_25 = DisplayModeId(5);
static inline const DisplayModeId HWC_CONFIG_ID_50 = DisplayModeId(6);
+ static inline const DisplayModeId HWC_CONFIG_ID_24 = DisplayModeId(7);
+ static inline const DisplayModeId HWC_CONFIG_ID_24_FRAC = DisplayModeId(8);
+ static inline const DisplayModeId HWC_CONFIG_ID_30_FRAC = DisplayModeId(9);
+ static inline const DisplayModeId HWC_CONFIG_ID_60_FRAC = DisplayModeId(10);
// Test configs
DisplayModePtr mConfig60 = createDisplayMode(HWC_CONFIG_ID_60, 0, Fps(60.0f).getPeriodNsecs());
+ DisplayModePtr mConfig60Frac =
+ createDisplayMode(HWC_CONFIG_ID_60_FRAC, 0, Fps(59.94f).getPeriodNsecs());
DisplayModePtr mConfig90 = createDisplayMode(HWC_CONFIG_ID_90, 0, Fps(90.0f).getPeriodNsecs());
DisplayModePtr mConfig90DifferentGroup =
createDisplayMode(HWC_CONFIG_ID_90, 1, Fps(90.0f).getPeriodNsecs());
@@ -117,9 +123,15 @@
DisplayModePtr mConfig30 = createDisplayMode(HWC_CONFIG_ID_30, 0, Fps(30.0f).getPeriodNsecs());
DisplayModePtr mConfig30DifferentGroup =
createDisplayMode(HWC_CONFIG_ID_30, 1, Fps(30.0f).getPeriodNsecs());
+ DisplayModePtr mConfig30Frac =
+ createDisplayMode(HWC_CONFIG_ID_30_FRAC, 0, Fps(29.97f).getPeriodNsecs());
+ DisplayModePtr mConfig25 = createDisplayMode(HWC_CONFIG_ID_25, 0, Fps(25.0f).getPeriodNsecs());
DisplayModePtr mConfig25DifferentGroup =
createDisplayMode(HWC_CONFIG_ID_25, 1, Fps(25.0f).getPeriodNsecs());
DisplayModePtr mConfig50 = createDisplayMode(HWC_CONFIG_ID_50, 0, Fps(50.0f).getPeriodNsecs());
+ DisplayModePtr mConfig24 = createDisplayMode(HWC_CONFIG_ID_24, 0, Fps(24.0f).getPeriodNsecs());
+ DisplayModePtr mConfig24Frac =
+ createDisplayMode(HWC_CONFIG_ID_24_FRAC, 0, Fps(23.976f).getPeriodNsecs());
// Test device configurations
// The positions of the configs in the arrays below MUST match their IDs. For example,
@@ -146,6 +158,11 @@
mConfig50};
DisplayModes m60_120Device = {mConfig60, mConfig120};
+ // This is a typical TV configuration.
+ DisplayModes m24_25_30_50_60WithFracDevice = {mConfig24, mConfig24Frac, mConfig25,
+ mConfig30, mConfig30Frac, mConfig50,
+ mConfig60, mConfig60Frac};
+
// Expected RefreshRate objects
RefreshRate mExpected60Config = {HWC_CONFIG_ID_60, mConfig60, Fps(60),
RefreshRate::ConstructorTag(0)};
@@ -1237,7 +1254,109 @@
const auto& refreshRate =
refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false});
EXPECT_TRUE(refreshRate.getFps().equalsWithMargin(Fps(test.second)))
- << "Expecting " << test.first << "fps => " << test.second << "Hz";
+ << "Expecting " << test.first << "fps => " << test.second << "Hz"
+ << " but it was " << refreshRate.getFps();
+ }
+}
+
+TEST_F(RefreshRateConfigsTest,
+ getBestRefreshRate_ExplicitExactOrMultiple_WithFractionalRefreshRates) {
+ auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 1.0f}};
+ auto& lr = layers[0];
+
+ // Test that 23.976 will choose 24 if 23.976 is not supported
+ {
+ android::DisplayModes modes = {mConfig24, mConfig25, mConfig30,
+ mConfig30Frac, mConfig60, mConfig60Frac};
+ auto refreshRateConfigs =
+ std::make_unique<RefreshRateConfigs>(modes, /*currentConfigId=*/HWC_CONFIG_ID_60);
+
+ lr.vote = LayerVoteType::ExplicitExactOrMultiple;
+ lr.desiredRefreshRate = Fps(23.976f);
+ lr.name = "ExplicitExactOrMultiple 23.976 fps";
+ EXPECT_EQ(HWC_CONFIG_ID_24,
+ refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false})
+ .getModeId());
+ }
+
+ // Test that 24 will choose 23.976 if 24 is not supported
+ {
+ android::DisplayModes modes = {mConfig24Frac, mConfig25, mConfig30,
+ mConfig30Frac, mConfig60, mConfig60Frac};
+ auto refreshRateConfigs =
+ std::make_unique<RefreshRateConfigs>(modes, /*currentConfigId=*/HWC_CONFIG_ID_60);
+ lr.desiredRefreshRate = Fps(24.f);
+ lr.name = "ExplicitExactOrMultiple 24 fps";
+ EXPECT_EQ(HWC_CONFIG_ID_24_FRAC,
+ refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false})
+ .getModeId());
+ }
+
+ // Test that 29.97 will prefer 59.94 over 60 and 30
+ {
+ android::DisplayModes modes = {mConfig24, mConfig24Frac, mConfig25,
+ mConfig30, mConfig60, mConfig60Frac};
+ auto refreshRateConfigs =
+ std::make_unique<RefreshRateConfigs>(modes, /*currentConfigId=*/HWC_CONFIG_ID_60);
+ lr.desiredRefreshRate = Fps(29.97f);
+ lr.name = "ExplicitExactOrMultiple 29.97f fps";
+ EXPECT_EQ(HWC_CONFIG_ID_60_FRAC,
+ refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false})
+ .getModeId());
+ }
+}
+
+TEST_F(RefreshRateConfigsTest, getBestRefreshRate_ExplicitExact_WithFractionalRefreshRates) {
+ auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 1.0f}};
+ auto& lr = layers[0];
+
+ // Test that voting for supported refresh rate will select this refresh rate
+ {
+ auto refreshRateConfigs =
+ std::make_unique<RefreshRateConfigs>(m24_25_30_50_60WithFracDevice,
+ /*currentConfigId=*/HWC_CONFIG_ID_60);
+
+ for (auto desiredRefreshRate : {23.976f, 24.f, 25.f, 29.97f, 30.f, 50.f, 59.94f, 60.f}) {
+ lr.vote = LayerVoteType::ExplicitExact;
+ lr.desiredRefreshRate = Fps(desiredRefreshRate);
+ std::stringstream ss;
+ ss << "ExplicitExact " << desiredRefreshRate << " fps";
+ lr.name = ss.str();
+
+ auto selecteRefreshRate =
+ refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false});
+
+ EXPECT_TRUE(selecteRefreshRate.getFps().equalsWithMargin(lr.desiredRefreshRate))
+ << "Expecting " << lr.desiredRefreshRate << " but it was "
+ << selecteRefreshRate.getFps();
+ }
+ }
+
+ // Test that 23.976 will choose 24 if 23.976 is not supported
+ {
+ android::DisplayModes modes = {mConfig24, mConfig25, mConfig30,
+ mConfig30Frac, mConfig60, mConfig60Frac};
+ auto refreshRateConfigs =
+ std::make_unique<RefreshRateConfigs>(modes, /*currentConfigId=*/HWC_CONFIG_ID_60);
+ lr.vote = LayerVoteType::ExplicitExact;
+ lr.desiredRefreshRate = Fps(23.976f);
+ lr.name = "ExplicitExact 23.976 fps";
+ EXPECT_EQ(HWC_CONFIG_ID_24,
+ refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false})
+ .getModeId());
+ }
+
+ // Test that 24 will choose 23.976 if 24 is not supported
+ {
+ android::DisplayModes modes = {mConfig24Frac, mConfig25, mConfig30,
+ mConfig30Frac, mConfig60, mConfig60Frac};
+ auto refreshRateConfigs =
+ std::make_unique<RefreshRateConfigs>(modes, /*currentConfigId=*/HWC_CONFIG_ID_60);
+ lr.desiredRefreshRate = Fps(24.f);
+ lr.name = "ExplicitExact 24 fps";
+ EXPECT_EQ(HWC_CONFIG_ID_24_FRAC,
+ refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false})
+ .getModeId());
}
}
@@ -2035,6 +2154,29 @@
refreshRateConfigs->getBestRefreshRate(layers, {.touch = true, .idle = false}));
}
+TEST_F(RefreshRateConfigsTest, getBestRefreshRate_FractionalRefreshRates_ExactAndDefault) {
+ RefreshRateConfigs::Config config = {.enableFrameRateOverride = true};
+ auto refreshRateConfigs =
+ std::make_unique<RefreshRateConfigs>(m24_25_30_50_60WithFracDevice,
+ /*currentConfigId=*/HWC_CONFIG_ID_60, config);
+
+ auto layers = std::vector<LayerRequirement>{LayerRequirement{.weight = 0.5f},
+ LayerRequirement{.weight = 0.5f}};
+ auto& explicitDefaultLayer = layers[0];
+ auto& explicitExactOrMultipleLayer = layers[1];
+
+ explicitExactOrMultipleLayer.vote = LayerVoteType::ExplicitExactOrMultiple;
+ explicitExactOrMultipleLayer.name = "ExplicitExactOrMultiple";
+ explicitExactOrMultipleLayer.desiredRefreshRate = Fps(60);
+
+ explicitDefaultLayer.vote = LayerVoteType::ExplicitDefault;
+ explicitDefaultLayer.name = "ExplicitDefault";
+ explicitDefaultLayer.desiredRefreshRate = Fps(59.94f);
+
+ EXPECT_EQ(mExpected60Config,
+ refreshRateConfigs->getBestRefreshRate(layers, {.touch = false, .idle = false}));
+}
+
TEST_F(RefreshRateConfigsTest, testComparisonOperator) {
EXPECT_TRUE(mExpected60Config < mExpected90Config);
EXPECT_FALSE(mExpected60Config < mExpected60Config);
@@ -2130,6 +2272,33 @@
EXPECT_EQ(0, RefreshRateConfigs::getFrameRateDivider(Fps(60.f), Fps(59.94f)));
}
+TEST_F(RefreshRateConfigsTest, isFractionalPairOrMultiple) {
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(23.976f), Fps(24.f)));
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(24.f), Fps(23.976f)));
+
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(29.97f), Fps(30.f)));
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(30.f), Fps(29.97f)));
+
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(59.94f), Fps(60.f)));
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(60.f), Fps(59.94f)));
+
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(29.97f), Fps(60.f)));
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(60.f), Fps(29.97f)));
+
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(59.94f), Fps(30.f)));
+ EXPECT_TRUE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(30.f), Fps(59.94f)));
+
+ const std::vector<float> refreshRates = {23.976f, 24.f, 25.f, 29.97f, 30.f, 50.f, 59.94f, 60.f};
+ for (auto refreshRate : refreshRates) {
+ EXPECT_FALSE(
+ RefreshRateConfigs::isFractionalPairOrMultiple(Fps(refreshRate), Fps(refreshRate)));
+ }
+
+ EXPECT_FALSE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(24.f), Fps(25.f)));
+ EXPECT_FALSE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(23.978f), Fps(25.f)));
+ EXPECT_FALSE(RefreshRateConfigs::isFractionalPairOrMultiple(Fps(29.97f), Fps(59.94f)));
+}
+
TEST_F(RefreshRateConfigsTest, getFrameRateOverrides_noLayers) {
auto refreshRateConfigs =
std::make_unique<RefreshRateConfigs>(m30_60_72_90_120Device, /*currentConfigId=*/