1 files changed, 108 insertions, 0 deletions
diff --git a/msm8909/sdm/libs/hwc/cpuhint.cpp b/msm8909/sdm/libs/hwc/cpuhint.cpp
new file mode 100644
index 00000000..2675c9bf
--- /dev/null
+++ b/msm8909/sdm/libs/hwc/cpuhint.cpp
@@ -0,0 +1,108 @@
+/* Copyright (c) 2015,2018 The Linux Foundataion. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+*     * Redistributions of source code must retain the above copyright
+*       notice, this list of conditions and the following disclaimer.
+*     * Redistributions in binary form must reproduce the above
+*       copyright notice, this list of conditions and the following
+*       disclaimer in the documentation and/or other materials provided
+*       with the distribution.
+*     * Neither the name of The Linux Foundation nor the names of its
+*       contributors may be used to endorse or promote products derived
+*       from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+*/
+
+#include <cutils/properties.h>
+#include <dlfcn.h>
+#include <utils/debug.h>
+
+#include "cpuhint.h"
+#include "hwc_debugger.h"
+
+#define __CLASS__ "CPUHint"
+
+namespace sdm {
+
+DisplayError CPUHint::Init(HWCDebugHandler *debug_handler) {
+  char path[PROPERTY_VALUE_MAX];
+  if (debug_handler->GetProperty("ro.vendor.extension_library", path) != kErrorNone) {
+    DLOGI("Vendor Extension Library not enabled");
+    return kErrorNotSupported;
+  }
+
+  int pre_enable_window = -1;
+  debug_handler->GetProperty(PERF_HINT_WINDOW_PROP, &pre_enable_window);
+  if (pre_enable_window <= 0) {
+    DLOGI("Invalid CPU Hint Pre-enable Window %d", pre_enable_window);
+    return kErrorNotSupported;
+  }
+
+  DLOGI("CPU Hint Pre-enable Window %d", pre_enable_window);
+  pre_enable_window_ = pre_enable_window;
+
+  if (vendor_ext_lib_.Open(path)) {
+    if (!vendor_ext_lib_.Sym("perf_lock_acq", reinterpret_cast<void **>(&fn_lock_acquire_)) ||
+        !vendor_ext_lib_.Sym("perf_lock_rel", reinterpret_cast<void **>(&fn_lock_release_))) {
+      DLOGW("Failed to load symbols for Vendor Extension Library");
+      return kErrorNotSupported;
+    }
+    DLOGI("Successfully Loaded Vendor Extension Library symbols");
+    enabled_ = true;
+  } else {
+    DLOGW("Failed to open %s : %s", path, vendor_ext_lib_.Error());
+  }
+
+  return kErrorNone;
+}
+
+void CPUHint::Set() {
+  if (!enabled_) {
+    return;
+  }
+  if (lock_acquired_) {
+    return;
+  }
+  if (frame_countdown_) {
+    --frame_countdown_;
+    return;
+  }
+
+  int hint = HINT;
+  lock_handle_ = fn_lock_acquire_(0 /*handle*/, 0/*duration*/,
+                                  &hint, sizeof(hint) / sizeof(int));
+  if (lock_handle_ >= 0) {
+    lock_acquired_ = true;
+  }
+}
+
+void CPUHint::Reset() {
+  if (!enabled_) {
+    return;
+  }
+
+  frame_countdown_ = pre_enable_window_;
+
+  if (!lock_acquired_) {
+    return;
+  }
+
+  fn_lock_release_(lock_handle_);
+  lock_acquired_ = false;
+}
+
+}  // namespace sdm