sdm: hwc2: Add support for TWM entry and exit.

- Implement SET_STAND_BY_MODE binder support. SKGHAL
  use this api to inform HWC about TWM entry/exit.
- Move to null display to drop all incoming calls
  from surfaceflinger on TWM entry.
- Move to normal display on TWM exit.
- Add scope_lock for SET_STAND_BY_MODE API.

Bug: 79541227
CRs-Fixed: 2200577
Change-Id: I26ef3b1af53856f68f76b116988cc2a28c06b6ac

msm8909w_3100/libqdutils/display_config.cpp

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2013-2014, 2016, The Linux Foundation. All rights reserved.
+* Copyright (c) 2013-2014, 2016, 2018 The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
@@ -316,6 +316,22 @@ int getPanelBrightness() {
     return panel_brightness;
 }
 
+int setStandByMode(int mode) {
+    status_t err = (status_t) FAILED_TRANSACTION;
+    sp<IQService> binder = getBinder();
+    Parcel inParcel, outParcel;
+
+    if(binder != NULL) {
+        inParcel.writeInt32(mode);
+        err = binder->dispatch(IQService::SET_STAND_BY_MODE,
+              &inParcel, &outParcel);
+        if(err) {
+            ALOGE("%s() failed with err %d", __FUNCTION__, err);
+        }
+    }
+    return err;
+}
+
 }// namespace
 
 // ----------------------------------------------------------------------------

msm8909w_3100/libqdutils/display_config.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013 - 2016 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013 - 2016, 2018 The Linux Foundation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -158,6 +158,7 @@ int setPanelBrightness(int level);
 // Retrieves the current panel brightness value
 int getPanelBrightness();
 
+int setStandByMode(int mode);
 }; //namespace
 
 #endif

msm8909w_3100/libqservice/IQService.h

@@ -1,6 +1,6 @@
 /*
  * Copyright (C) 2010 The Android Open Source Project
- * Copyright (C) 2012-2014, 2016 The Linux Foundation. All rights reserved.
+ * Copyright (C) 2012-2014, 2016, 2018 The Linux Foundation. All rights reserved.
  *
  * Not a Contribution, Apache license notifications and license are
  * retained for attribution purposes only.
@@ -75,6 +75,7 @@ public:
         SET_LAYER_MIXER_RESOLUTION = 33, // Enables client to set layer mixer resolution.
         SET_COLOR_MODE = 34, // Overrides the QDCM mode on the display
         GET_HDR_CAPABILITIES = 35, // Get HDR capabilities for legacy HWC interface
+        SET_STAND_BY_MODE = 36, //Set stand by mode for MDP3 hardware.
         COMMAND_LIST_END = 400,
     };
 

msm8909w_3100/sdm/libs/hwc2/hwc_display.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
  * Not a Contribution.
  *
  * Copyright 2015 The Android Open Source Project
@@ -148,6 +148,9 @@ class HWCDisplay : public DisplayEventHandler {
   virtual int SetState(bool connected) {
     return kErrorNotSupported;
   }
+  virtual DisplayError SetStandByMode(bool enable) {
+    return kErrorNotSupported;
+  }
   int SetPanelBrightness(int level);
   int GetPanelBrightness(int *level);
   int ToggleScreenUpdates(bool enable);

msm8909w_3100/sdm/libs/hwc2/hwc_display_primary.cpp

@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2014 - 2017, The Linux Foundation. All rights reserved.
+* Copyright (c) 2014 - 2018, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
@@ -594,4 +594,28 @@ DisplayError HWCDisplayPrimary::GetMixerResolution(uint32_t *width, uint32_t *he
   return display_intf_->GetMixerResolution(width, height);
 }
 
+DisplayError HWCDisplayPrimary::SetStandByMode(bool enable) {
+  if (enable) {
+    if (!display_null_.IsActive()) {
+      stored_display_intf_ = display_intf_;
+      display_intf_ = &display_null_;
+      display_null_.SetActive(true);
+      DLOGD("Null display is connected successfully");
+    } else {
+      DLOGD("Null display is already connected.");
+    }
+  } else {
+    if (display_null_.IsActive()) {
+      display_intf_ = stored_display_intf_;
+      validated_.reset();
+      display_null_.SetActive(false);
+      DLOGD("Display is connected successfully");
+    } else {
+      DLOGD("Display is already connected.");
+    }
+  }
+
+  return kErrorNone;
+}
+
 }  // namespace sdm

msm8909w_3100/sdm/libs/hwc2/hwc_display_primary.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2016, 2018 The Linux Foundation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -34,6 +34,7 @@
 
 #include "cpuhint.h"
 #include "hwc_display.h"
+#include "display_null.h"
 
 namespace sdm {
 
@@ -67,6 +68,7 @@ class HWCDisplayPrimary : public HWCDisplay {
   virtual int GetFrameCaptureStatus() { return frame_capture_status_; }
   virtual DisplayError SetDetailEnhancerConfig(const DisplayDetailEnhancerData &de_data);
   virtual DisplayError ControlPartialUpdate(bool enable, uint32_t *pending);
+  virtual DisplayError SetStandByMode(bool enable);
 
  private:
   HWCDisplayPrimary(CoreInterface *core_intf, BufferAllocator *buffer_allocator,
@@ -102,6 +104,11 @@ class HWCDisplayPrimary : public HWCDisplay {
   BufferInfo output_buffer_info_ = {};
   void *output_buffer_base_ = nullptr;
   int default_mode_status_ = 0;
+
+  //Null display
+  DisplayNull display_null_;
+  DisplayInterface *stored_display_intf_ = NULL;
+
 };
 
 }  // namespace sdm

msm8909w_3100/sdm/libs/hwc2/hwc_session.cpp

@@ -1015,6 +1015,10 @@ android::status_t HWCSession::notifyCallback(uint32_t command, const android::Pa
       status = SetColorModeOverride(input_parcel);
       break;
 
+    case qService::IQService::SET_STAND_BY_MODE:
+      status = SetStandByMode(input_parcel);
+      break;
+
     default:
       DLOGW("QService command = %d is not supported", command);
       return -EINVAL;
@@ -1501,6 +1505,21 @@ android::status_t HWCSession::GetVisibleDisplayRect(const android::Parcel *input
   return android::NO_ERROR;
 }
 
+android::status_t HWCSession::SetStandByMode(const android::Parcel *input_parcel) {
+  SCOPE_LOCK(locker_);
+
+  bool enable = (input_parcel->readInt32() > 0);
+
+  if (!hwc_display_[HWC_DISPLAY_PRIMARY]) {
+    DLOGI("Primary display is not initialized");
+    return -EINVAL;
+  }
+
+  hwc_display_[HWC_DISPLAY_PRIMARY]->SetStandByMode(enable);
+
+  return android::NO_ERROR;
+}
+
 void HWCSession::Refresh(hwc2_display_t display) {
   SCOPE_LOCK(callbacks_lock_);
   HWC2::Error err = callbacks_.Refresh(display);

msm8909w_3100/sdm/libs/hwc2/hwc_session.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
  * Not a Contribution.
  *
  * Copyright 2015 The Android Open Source Project
@@ -218,6 +218,7 @@ class HWCSession : hwc2_device_t, HWCUEventListener, IDisplayConfig, public qCli
                                           android::Parcel *output_parcel);
   android::status_t SetMixerResolution(const android::Parcel *input_parcel);
   android::status_t SetColorModeOverride(const android::Parcel *input_parcel);
+  android::status_t SetStandByMode(const android::Parcel *input_parcel);
 
   void Refresh(hwc2_display_t display);
   void HotPlug(hwc2_display_t display, HWC2::Connection state);