Merge tag 'wireless-drivers-next-for-davem-2016-02-12' of git://git.kernel.org/pub...
[cascardo/linux.git] / drivers / gpu / drm / amd / powerplay / eventmgr / psm.c
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  */
23 #include "psm.h"
24
25 int psm_get_ui_state(struct pp_eventmgr *eventmgr, enum PP_StateUILabel ui_label, unsigned long *state_id)
26 {
27         struct pp_power_state *state;
28         int table_entries;
29         struct pp_hwmgr *hwmgr = eventmgr->hwmgr;
30         int i;
31
32         table_entries = hwmgr->num_ps;
33         state = hwmgr->ps;
34
35         for (i = 0; i < table_entries; i++) {
36                 if (state->classification.ui_label & ui_label) {
37                         *state_id = state->id;
38                         return 0;
39                 }
40                 state = (struct pp_power_state *)((unsigned long)state + hwmgr->ps_size);
41         }
42         return -1;
43 }
44
45 int psm_get_state_by_classification(struct pp_eventmgr *eventmgr, enum PP_StateClassificationFlag flag, unsigned long *state_id)
46 {
47         struct pp_power_state *state;
48         int table_entries;
49         struct pp_hwmgr *hwmgr = eventmgr->hwmgr;
50         int i;
51
52         table_entries = hwmgr->num_ps;
53         state = hwmgr->ps;
54
55         for (i = 0; i < table_entries; i++) {
56                 if (state->classification.flags & flag) {
57                         *state_id = state->id;
58                         return 0;
59                 }
60                 state = (struct pp_power_state *)((unsigned long)state + hwmgr->ps_size);
61         }
62         return -1;
63 }
64
65 int psm_set_states(struct pp_eventmgr *eventmgr, unsigned long *state_id)
66 {
67         struct pp_power_state *state;
68         int table_entries;
69         struct pp_hwmgr *hwmgr = eventmgr->hwmgr;
70         int i;
71
72         table_entries = hwmgr->num_ps;
73         state = hwmgr->ps;
74
75         for (i = 0; i < table_entries; i++) {
76                 if (state->id == *state_id) {
77                         hwmgr->request_ps = state;
78                         return 0;
79                 }
80                 state = (struct pp_power_state *)((unsigned long)state + hwmgr->ps_size);
81         }
82         return -1;
83 }
84
85 int psm_adjust_power_state_dynamic(struct pp_eventmgr *eventmgr, bool skip)
86 {
87
88         struct pp_power_state *pcurrent;
89         struct pp_power_state *requested;
90         struct pp_hwmgr *hwmgr;
91         bool equal;
92
93         if (skip)
94                 return 0;
95
96         hwmgr = eventmgr->hwmgr;
97         pcurrent = hwmgr->current_ps;
98         requested = hwmgr->request_ps;
99
100         if (requested == NULL)
101                 return 0;
102
103         if (pcurrent == NULL || (0 != phm_check_states_equal(hwmgr, &pcurrent->hardware, &requested->hardware, &equal)))
104                 equal = false;
105
106         if (!equal || phm_check_smc_update_required_for_display_configuration(hwmgr)) {
107                 phm_apply_state_adjust_rules(hwmgr, requested, pcurrent);
108                 phm_set_power_state(hwmgr, &pcurrent->hardware, &requested->hardware);
109                 hwmgr->current_ps = requested;
110         }
111         return 0;
112 }
113
114 int psm_adjust_power_state_static(struct pp_eventmgr *eventmgr, bool skip)
115 {
116         return 0;
117 }