Merge pull request #1 from intel-retail/add_code

Initial commit

LICENSE

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+// Copyright (C) 2023 Intel Corporation
+// SPDX-License-Identifier: MIT

Makefile

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+# Copyright (C) 2023 Intel Corporation
+# SPDX-License-Identifier: MIT
+
+#DIRS = $(shell find . -maxdepth 1 -type d -not -path "./.git" \
+#	   -not -path "." -not -path "./release" -not -path "./cmn" | sort)
+DIRS = lib synctest
+.PHONY: $(DIRS)
+
+MAKE += --no-print-directory
+CFLAGS =-g
+all:
+	@for dir in $(DIRS); do \
+		$(MAKE) -C $$dir; \
+	done
+
+debug:
+	@for dir in $(DIRS); do \
+		$(MAKE) -C $$dir debug; \
+	done
+
+clean:
+	@for dir in $(DIRS); do \
+		$(MAKE) -C $$dir clean; \
+	done
+
+distclean:
+	@rm -rf release
+
+release: distclean
+	@$(MAKE) clean
+	@$(MAKE)
+	@mkdir release
+	@cp lib/*.so synctest/synctest release

README.md

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+ Copyright (C) 2023 Intel Corporation
+ SPDX-License-Identifier: MIT
+
+This program allows a system to alter their vertical sync firing times.
+This is sample code only and is only supported on 11th Gen Core. 
+
+Building steps:
+1) sudo apt install libdrm-dev libpciaccess-dev
+1) Type 'make release' from the main directory. It compiles everything and creates a 
+   release folder which can then be copied to the target systems.
+
+Building of this program has been succesfully tested on both Ubuntu 20 and Fedora 30.
+
+Installing and running the programs:
+1) On the system, go to the directory where these files exist and set environment variable:
+export LD_LIBRARY_PATH=.
+2) On the primary system, run it as follows:
+	./synctest 
+(Note by default this is set to move vsync by 1.0 ms.)

cmn/debug.h

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+// Copyright (C) 2023 Intel Corporation
+// SPDX-License-Identifier: MIT
+
+#ifndef _DEBUG_H
+#define _DEBUG_H
+
+#include <stdio.h>
+
+enum {
+	ERR,
+	INFO,
+	DBG,
+	TRACE,
+};
+
+/*
+ * Set it to 0 or higher with 0 being lowest number of messages
+ * 0 = Only errors show up
+ * 1 = Errors + Info messages
+ * 2 = Errors + Info messages + Debug messages
+ * 3 = Errors + Info messages + Debug messages + Trace calls
+ */
+static int dbg_lvl = INFO;
+
+#define _PRINT(prefix, fmt, ...)  \
+	if(1) {\
+		printf("%s", prefix); \
+		printf(fmt, ##__VA_ARGS__); \
+		fflush(stdout); \
+	}
+
+#define PRINT(fmt, ...)    _PRINT("", fmt, ##__VA_ARGS__)
+#define ERR(fmt, ...)    _PRINT("[Error] ", fmt, ##__VA_ARGS__)
+#define WARNING(fmt, ...)  _PRINT("[Warning] ", fmt, ##__VA_ARGS__)
+#define DBG(fmt, ...)      if(dbg_lvl >= DBG) _PRINT("[DBG] ", fmt, ##__VA_ARGS__)
+#define INFO(fmt, ...)     if(dbg_lvl >= INFO) _PRINT("[Info] ", fmt, ##__VA_ARGS__)
+#define TRACE(fmt, ...)    if(dbg_lvl >= TRACE) PRINT(fmt, ##__VA_ARGS__)
+
+#ifdef __cplusplus
+#define TRACING()  tracer trace(__FUNCTION__);
+#else
+#define TRACING()
+#endif
+
+#ifdef __cplusplus
+class tracer {
+private:
+	char *m_func_name;
+public:
+	tracer(const char *func_name)
+	{
+		TRACE(">>> %s\n", func_name);
+		m_func_name = (char *) func_name;
+	}
+	~tracer() { TRACE("<<< %s\n", m_func_name); }
+};
+#endif
+
+inline int set_dbg_lvl(int lvl)
+{
+	int ret = 1;
+	if(lvl >= ERR && lvl <= TRACE) {
+		dbg_lvl = lvl;
+		ret = 0;
+	}
+	return ret;
+}
+
+#endif

cmn/vsyncalter.h

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+// Copyright (C) 2023 Intel Corporation
+// SPDX-License-Identifier: MIT
+
+#ifndef _VSYNCALTER_H
+#define _VSYNCALTER_H
+
+#define ONE_VSYNC_PERIOD_IN_MS        16.666
+#define MAX_TIMESTAMPS                100
+
+int vsync_lib_init();
+void vsync_lib_uninit();
+void synchronize_vsync(double time_diff);
+int get_vsync(long *vsync_array, int size);
+int find_enabled_combo_phys();
+
+#endif

lib/Makefile

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+# Copyright (C) 2023 Intel Corporation
+# SPDX-License-Identifier: MIT
+
+export PWD=$(shell pwd)
+BINNAME=libvsyncalter.so
+MAKE += --no-print-directory
+export CC=g++
+export DBG_FLAGS?=-Ofast
+export LIBS=-lrt -ldrm -lpciaccess
+export INCLUDES=-I../cmn -I/usr/include/drm
+export CFLAGS=-c -fPIC
+export LFLAGS=-Wall
+export HEADERS=$(wildcard *.h)
+export SOURCES=$(wildcard *.cpp)
+OBJECTS=$(SOURCES:.cpp=.o)
+
+all::
+	@echo "Compiling..."
+
+all::$(SOURCES) $(BINNAME)
+
+all::
+	@echo "Done"
+
+$(BINNAME): $(OBJECTS)
+	@$(CC) $(DBG_FLAGS) $(LFLAGS) -shared -o $@ $(OBJECTS) $(LIBS) 
+	@if [ "$(DBG_FLAGS)" = "" ]; then \
+		echo "Stripping $@"; \
+		strip -x $@; \
+	fi
+
+.cpp.o: $(HEADERS)
+	@echo $<
+	@$(CC) $(DBG_FLAGS) $(CFLAGS) $(LFLAGS) $(INCLUDES) $< 
+
+debug:
+	@export DBG_FLAGS='-g'; \
+	$(MAKE)
+
+clean:
+	@echo "Cleaning..."
+	@rm -f $(BINNAME) *.o
+