Revert "libhwc2.1: wait for peak refresh rate via sysfs node"

Revert submission 21117545-rr_sysfs

Reason for revert: b/267569180

Reverted changes: /q/submissionid:21117545-rr_sysfs

Change-Id: Ifaaee60913ffc32e8ae9ab7acec327a968468ac7
(cherry picked from commit 334e1fee2f8204c8b30714291d60c19077e6df9f)
Merged-In: Ifaaee60913ffc32e8ae9ab7acec327a968468ac7

1 files changed, 5 insertions, 7 deletions

diff --git a/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp b/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp
index e436663..dbb11bd 100644
--- a/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp
+++ b/libhwc2.1/libdisplayinterface/ExynosDisplayDrmInterface.cpp
@@ -920,12 +920,11 @@ int32_t ExynosDisplayDrmInterface::getDisplayConfigs(
         /* key: (width<<32 | height) */
         std::map<uint64_t, uint32_t> groupIds;
         uint32_t groupId = 0;
-        float peakRr = -1;
+        uint32_t min_vsync_period = UINT_MAX;
 
         for (const DrmMode &mode : mDrmConnector->modes()) {
             displayConfigs_t configs;
-            float rr = mode.v_refresh();
-            configs.vsyncPeriod = nsecsPerSec / rr;
+            configs.vsyncPeriod = nsecsPerSec/ mode.v_refresh();
             configs.width = mode.h_display();
             configs.height = mode.v_display();
             uint64_t key = ((uint64_t)configs.width<<32) | configs.height;
@@ -942,15 +941,14 @@ 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 peak rr
-            if (rr > peakRr)
-                  peakRr = rr;
+            // 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->setPeakRefreshRate(peakRr);
+        mExynosDisplay->setMinDisplayVsyncPeriod(min_vsync_period);
     }
 
     uint32_t num_modes = static_cast<uint32_t>(mDrmConnector->modes().size());