/* * Copyright 2015 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: AMD * */ #include <linux/string.h>#include <linux/acpi.h> #include <drm/drm_probe_helper.h>#include <drm/amdgpu_drm.h>#include "dm_services.h"#include "amdgpu.h"#include "amdgpu_dm.h"#include "amdgpu_dm_irq.h"#include "amdgpu_pm.h"   unsigned long long dm_get_elapse_time_in_ns(struct dc_context *ctx,		unsigned long long current_time_stamp,		unsigned long long last_time_stamp){	return current_time_stamp - last_time_stamp;} void dm_perf_trace_timestamp(const char *func_name, unsigned int line){} bool dm_write_persistent_data(struct dc_context *ctx,		const struct dc_sink *sink,		const char *module_name,		const char *key_name,		void *params,		unsigned int size,		struct persistent_data_flag *flag){	/*TODO implement*/	return false;} bool dm_read_persistent_data(struct dc_context *ctx,				const struct dc_sink *sink,				const char *module_name,				const char *key_name,				void *params,				unsigned int size,				struct persistent_data_flag *flag){	/*TODO implement*/	return false;} /**** power component interfaces ****/