drivers/gpu/drm/nouveau/core/subdev/therm/temp.c

   1 /*
   2  * Copyright 2012 The Nouveau community
   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: Martin Peres
  23  */
  24
  25 #include "priv.h"
  26
  27 #include <core/object.h>
  28 #include <core/device.h>
  29
  30 #include <subdev/bios.h>
  31
  32 static void
  33 nouveau_therm_temp_set_defaults(struct nouveau_therm *therm)
  34 {
  35         struct nouveau_therm_priv *priv = (void *)therm;
  36
  37         priv->bios_sensor.slope_mult = 1;
  38         priv->bios_sensor.slope_div = 1;
  39         priv->bios_sensor.offset_num = 0;
  40         priv->bios_sensor.offset_den = 1;
  41         priv->bios_sensor.offset_constant = 0;
  42
  43         priv->bios_sensor.thrs_fan_boost.temp = 90;
  44         priv->bios_sensor.thrs_fan_boost.hysteresis = 3;
  45
  46         priv->bios_sensor.thrs_down_clock.temp = 95;
  47         priv->bios_sensor.thrs_down_clock.hysteresis = 3;
  48
  49         priv->bios_sensor.thrs_critical.temp = 105;
  50         priv->bios_sensor.thrs_critical.hysteresis = 5;
  51
  52         priv->bios_sensor.thrs_shutdown.temp = 135;
  53         priv->bios_sensor.thrs_shutdown.hysteresis = 5; /*not that it matters */
  54 }
  55
  56
  57 static void
  58 nouveau_therm_temp_safety_checks(struct nouveau_therm *therm)
  59 {
  60         struct nouveau_therm_priv *priv = (void *)therm;
  61
  62         if (!priv->bios_sensor.slope_div)
  63                 priv->bios_sensor.slope_div = 1;
  64         if (!priv->bios_sensor.offset_den)
  65                 priv->bios_sensor.offset_den = 1;
  66 }
  67
  68 int
  69 nouveau_therm_sensor_ctor(struct nouveau_therm *therm)
  70 {
  71         struct nouveau_therm_priv *priv = (void *)therm;
  72         struct nouveau_bios *bios = nouveau_bios(therm);
  73
  74         nouveau_therm_temp_set_defaults(therm);
  75         if (nvbios_therm_sensor_parse(bios, NVBIOS_THERM_DOMAIN_CORE,
  76                                       &priv->bios_sensor))
  77                 nv_error(therm, "nvbios_therm_sensor_parse failed\n");
  78         nouveau_therm_temp_safety_checks(therm);
  79
  80         return 0;
  81 }