libhwc2.1: handling histogram events from different display

use crtc_id to tell which display histogram event handling should be
called

Bug: 238830432

Test: local verified with an aidl_hist_client on an F10 proto1.0,
sampling histogram concurrently, and check the readback histogram data

Change-Id: Ic67f25bbf557f024e8e89b5ad43a0d510071c7e2

1 files changed, 13 insertions, 6 deletions

diff --git a/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp b/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp
index 1df6fe9..0437bbb 100644
--- a/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp
+++ b/libhwc2.1/libdisplayinterface/ExynosDeviceDrmInterface.cpp
@@ -236,12 +236,19 @@ void ExynosDeviceDrmInterface::ExynosDrmEventHandler::handleEvent(uint64_t times
         display->handleHotplugEvent();
 }
 
-void ExynosDeviceDrmInterface::ExynosDrmEventHandler::handleHistogramEvent(void *bin) {
-    ExynosDisplay *primaryDisplay = mExynosDevice->getDisplay(HWC_DISPLAY_PRIMARY);
-    if (primaryDisplay != NULL) {
-        ExynosDisplayDrmInterface *displayInterface =
-                static_cast<ExynosDisplayDrmInterface *>(primaryDisplay->mDisplayInterface.get());
-        displayInterface->setHistogramData(bin);
+void ExynosDeviceDrmInterface::ExynosDrmEventHandler::handleHistogramEvent(uint32_t crtc_id,
+                                                                           void *bin) {
+    ExynosDisplayDrmInterface *displayInterface;
+    DrmProperty crtc;
+    uint32_t id;
+
+    for (auto display : mExynosDevice->mDisplays) {
+        displayInterface =
+                static_cast<ExynosDisplayDrmInterface *>(display->mDisplayInterface.get());
+        id = displayInterface->getCrtcId();
+        if (id == crtc_id) {
+            displayInterface->setHistogramData(bin);
+        }
     }
 }