1 /*
2  * Copyright 2015 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: AMD
23  *
24  */
25 
26 #include <linux/string.h>
27 #include <linux/acpi.h>
28 
29 #include <drm/drmP.h>
30 #include <drm/drm_crtc_helper.h>
31 #include <drm/amdgpu_drm.h>
32 #include "dm_services.h"
33 #include "amdgpu.h"
34 #include "amdgpu_dm.h"
35 #include "amdgpu_dm_irq.h"
36 #include "amdgpu_pm.h"
37 
38 
39 
40 unsigned long long dm_get_elapse_time_in_ns(struct dc_context *ctx,
41 		unsigned long long current_time_stamp,
42 		unsigned long long last_time_stamp)
43 {
44 	return current_time_stamp - last_time_stamp;
45 }
46 
47 void dm_perf_trace_timestamp(const char *func_name, unsigned int line)
48 {
49 }
50 
51 bool dm_write_persistent_data(struct dc_context *ctx,
52 		const struct dc_sink *sink,
53 		const char *module_name,
54 		const char *key_name,
55 		void *params,
56 		unsigned int size,
57 		struct persistent_data_flag *flag)
58 {
59 	/*TODO implement*/
60 	return false;
61 }
62 
63 bool dm_read_persistent_data(struct dc_context *ctx,
64 				const struct dc_sink *sink,
65 				const char *module_name,
66 				const char *key_name,
67 				void *params,
68 				unsigned int size,
69 				struct persistent_data_flag *flag)
70 {
71 	/*TODO implement*/
72 	return false;
73 }
74 
75 /**** power component interfaces ****/
76 
77