sdm: Print Warning Log for Failed Backlight Node Read only for TUI Usecase

Change-Id: Ia381a8ea74d8b5314ea13d149dbe662e35c9d07c
diff --git a/sdm/libs/dal/hw_peripheral_drm.cpp b/sdm/libs/dal/hw_peripheral_drm.cpp
index 4723f9a..c534f3b 100644
--- a/sdm/libs/dal/hw_peripheral_drm.cpp
+++ b/sdm/libs/dal/hw_peripheral_drm.cpp
@@ -738,16 +738,17 @@
 
   std::string brightness_node(brightness_base_path_ + "brightness");
   int fd = Sys::open_(brightness_node.c_str(), O_RDWR);
-  if (fd < 0) {
-    if (connector_info_.backlight_type != "dcs") {
-      DLOGW("Failed to open node = %s, error = %s ", brightness_node.c_str(),
+#ifdef TRUSTED_VM
+  if (connector_info_.backlight_type != "dcs") {
+    DLOGW("Failed to open node = %s, error = %s ", brightness_node.c_str(),
           strerror(errno));
-      return kErrorFileDescriptor;
-    } else {
+    return kErrorFileDescriptor;
+  }
+#endif
+  if (fd < 0) {
     DLOGE("Failed to open node = %s, error = %s ", brightness_node.c_str(),
           strerror(errno));
     return kErrorFileDescriptor;
-    }
   }
 
   int32_t bytes = snprintf(buffer, kMaxSysfsCommandLength, "%d\n", level);
@@ -779,16 +780,17 @@
 
   std::string brightness_node(brightness_base_path_ + "brightness");
   int fd = Sys::open_(brightness_node.c_str(), O_RDWR);
+#ifdef TRUSTED_VM
+  if (connector_info_.backlight_type != "dcs") {
+    DLOGW("Failed to open brightness node = %s, error = %s", brightness_node.c_str(),
+           strerror(errno));
+    return kErrorFileDescriptor;
+  }
+#endif
   if (fd < 0) {
-    if (connector_info_.backlight_type != "dcs") {
-      DLOGW("Failed to open brightness node = %s, error = %s", brightness_node.c_str(),
-             strerror(errno));
-      return kErrorFileDescriptor;
-    } else {
     DLOGE("Failed to open brightness node = %s, error = %s", brightness_node.c_str(),
            strerror(errno));
     return kErrorFileDescriptor;
-    }
   }
 
   if (Sys::pread_(fd, value, sizeof(value), 0) > 0) {
@@ -818,16 +820,17 @@
 
   std::string brightness_node(brightness_base_path_ + "max_brightness");
   int fd = Sys::open_(brightness_node.c_str(), O_RDONLY);
-  if (fd < 0) {
-    if (connector_info_.backlight_type != "dcs") {
+#ifdef TRUSTED_VM
+  if (connector_info_.backlight_type != "dcs") {
     DLOGW("Failed to open max brightness node = %s, error = %s", brightness_node.c_str(),
           strerror(errno));
     return;
-  } else {
+  }
+#endif
+  if (fd < 0) {
     DLOGE("Failed to open max brightness node = %s, error = %s", brightness_node.c_str(),
           strerror(errno));
     return;
-    }
   }
 
   if (Sys::pread_(fd, value, sizeof(value), 0) > 0) {