LXR linux/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
  25int 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
  45int 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
  65int 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
  85int 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
 114int psm_adjust_power_state_static(struct pp_eventmgr *eventmgr, bool skip)
 115{
 116        return 0;
 117}
 118