libhwc2.1: wait for peak refresh rate before enabling LHBM am: b9f0ab6126

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/graphics/common/+/18655759

Change-Id: Ied0bda8f0f8969878e30036e83043b60cc726fcc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp b/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp
index 3ccfaf4..cda2321 100644
--- a/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp
+++ b/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp
@@ -879,6 +879,7 @@ int32_t ExynosDisplayDrmInterface::getDisplayConfigs(
         /* key: (width<<32 | height) */
         std::map<uint64_t, uint32_t> groupIds;
         uint32_t groupId = 0;
+        uint32_t min_vsync_period = UINT_MAX;
 
         for (const DrmMode &mode : mDrmConnector->modes()) {
             displayConfigs_t configs;
@@ -899,11 +900,14 @@ int32_t ExynosDisplayDrmInterface::getDisplayConfigs(
             configs.Xdpi = mm_width ? (mode.h_display() * kUmPerInch) / mm_width : -1;
             // Dots per 1000 inches
             configs.Ydpi = mm_height ? (mode.v_display() * kUmPerInch) / mm_height : -1;
+            // find min vsync period
+            if (configs.vsyncPeriod <= min_vsync_period) min_vsync_period = configs.vsyncPeriod;
             mExynosDisplay->mDisplayConfigs.insert(std::make_pair(mode.id(), configs));
             ALOGD("config group(%d), w(%d), h(%d), vsync(%d), xdpi(%d), ydpi(%d)",
                     configs.groupId, configs.width, configs.height,
                     configs.vsyncPeriod, configs.Xdpi, configs.Ydpi);
         }
+        mExynosDisplay->setMinDisplayVsyncPeriod(min_vsync_period);
     }
 
     uint32_t num_modes = static_cast<uint32_t>(mDrmConnector->modes().size());