From 98fc399c2660727a6bde66e1a51e8460aaf3c7e7 Mon Sep 17 00:00:00 2001
From: nkk71 <nkk71x@gmail.com>
Date: Sat, 16 Dec 2017 16:26:42 +0200
Subject: Use /persist as Qualcomm time fix source during early boot

* /persist can be mounted early while TWRP is parsing the fstab so
  as soon as the partition is parsed, mount and adjust the time
  accordingly.

* Store a backup settings file on /persist. Having a 2nd copy of
  the settings file in the /persist partition allows for early
  reading of the file and adjust timezone and brightness to user
  preference while still on TWRP splash.

* Add the qcom ats time offset in TWRP settings file and use it
  if no better ats file is found. This will also allow devices
  with a persist partition, but no ats files in it, to adjust
  the time offset during early boot.

* Use /persist/time/ as Qualcomm time fix source, based on
  Xuefer <xuefer@gmail.com> patch:
  https://gerrit.omnirom.org/c/27265/
  https://gerrit.omnirom.org/c/24384/

Change-Id: I6c21538eec58d87edfb639d9ce3871f33b886c1d
---
 data.cpp | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 50 insertions(+), 3 deletions(-)

(limited to 'data.cpp')

diff --git a/data.cpp b/data.cpp
index 599b5c0d8..4dfbde2d0 100644
--- a/data.cpp
+++ b/data.cpp
@@ -230,7 +230,7 @@ int DataManager::ResetDefaults()
 
 int DataManager::LoadValues(const string& filename)
 {
-	string str, dev_id;
+	string dev_id;
 
 	if (!mInitialized)
 		SetDefaultValues();
@@ -263,6 +263,44 @@ int DataManager::LoadValues(const string& filename)
 	return 0;
 }
 
+int DataManager::LoadPersistValues(void)
+{
+	static bool loaded = false;
+	string dev_id;
+
+	// Only run this function once, and make sure normal settings file has not yet been read
+	if (loaded || !mBackingFile.empty() || !TWFunc::Path_Exists(PERSIST_SETTINGS_FILE))
+		return -1;
+
+	LOGINFO("Attempt to load settings from /persist settings file...\n");
+
+	if (!mInitialized)
+		SetDefaultValues();
+
+	GetValue("device_id", dev_id);
+	mPersist.SetFile(PERSIST_SETTINGS_FILE);
+	mPersist.SetFileVersion(FILE_VERSION);
+
+	// Read in the file, if possible
+	pthread_mutex_lock(&m_valuesLock);
+	mPersist.LoadValues();
+
+#ifndef TW_NO_SCREEN_TIMEOUT
+	blankTimer.setTime(mPersist.GetIntValue("tw_screen_timeout_secs"));
+#endif
+
+	update_tz_environment_variables();
+	TWFunc::Set_Brightness(GetStrValue("tw_brightness"));
+
+	pthread_mutex_unlock(&m_valuesLock);
+
+	/* Don't set storage nor backup paths this early */
+
+	loaded = true;
+
+	return 0;
+}
+
 int DataManager::Flush()
 {
 	return SaveValues();
@@ -271,6 +309,15 @@ int DataManager::Flush()
 int DataManager::SaveValues()
 {
 #ifndef TW_OEM_BUILD
+	if (PartitionManager.Mount_By_Path("/persist", false)) {
+		mPersist.SetFile(PERSIST_SETTINGS_FILE);
+		mPersist.SetFileVersion(FILE_VERSION);
+		pthread_mutex_lock(&m_valuesLock);
+		mPersist.SaveValues();
+		pthread_mutex_unlock(&m_valuesLock);
+		LOGINFO("Saved settings file values to %s\n", PERSIST_SETTINGS_FILE);
+	}
+
 	if (mBackingFile.empty())
 		return -1;
 
@@ -284,7 +331,7 @@ int DataManager::SaveValues()
 	pthread_mutex_unlock(&m_valuesLock);
 
 	tw_set_default_metadata(mBackingFile.c_str());
-	LOGINFO("Saved settings file values\n");
+	LOGINFO("Saved settings file values to '%s'\n", mBackingFile.c_str());
 #endif // ifdef TW_OEM_BUILD
 	return 0;
 }
@@ -353,7 +400,7 @@ int DataManager::GetValue(const string& varName, float& value)
 	return 0;
 }
 
-unsigned long long DataManager::GetValue(const string& varName, unsigned long long& value)
+int DataManager::GetValue(const string& varName, unsigned long long& value)
 {
 	string data;
 
-- 
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