drivers/gpu/drm/nouveau/nvkm/subdev/volt/gm20b.c

   1 /*
   2  * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
   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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include "priv.h"
  24 #include "gk20a.h"
  25
  26 #include <core/tegra.h>
  27
  28 static const struct cvb_coef gm20b_cvb_coef[] = {
  29         /* KHz,             c0,      c1,   c2 */
  30         /*  76800 */ { 1786666,  -85625, 1632 },
  31         /* 153600 */ { 1846729,  -87525, 1632 },
  32         /* 230400 */ { 1910480,  -89425, 1632 },
  33         /* 307200 */ { 1977920,  -91325, 1632 },
  34         /* 384000 */ { 2049049,  -93215, 1632 },
  35         /* 460800 */ { 2122872,  -95095, 1632 },
  36         /* 537600 */ { 2201331,  -96985, 1632 },
  37         /* 614400 */ { 2283479,  -98885, 1632 },
  38         /* 691200 */ { 2369315, -100785, 1632 },
  39         /* 768000 */ { 2458841, -102685, 1632 },
  40         /* 844800 */ { 2550821, -104555, 1632 },
  41         /* 921600 */ { 2647676, -106455, 1632 },
  42 };
  43
  44 static const struct cvb_coef gm20b_na_cvb_coef[] = {
  45         /* KHz,         c0,     c1,   c2,    c3,     c4,   c5 */
  46         /*  76800 */ {  814294, 8144, -940, 808, -21583, 226 },
  47         /* 153600 */ {  856185, 8144, -940, 808, -21583, 226 },
  48         /* 230400 */ {  898077, 8144, -940, 808, -21583, 226 },
  49         /* 307200 */ {  939968, 8144, -940, 808, -21583, 226 },
  50         /* 384000 */ {  981860, 8144, -940, 808, -21583, 226 },
  51         /* 460800 */ { 1023751, 8144, -940, 808, -21583, 226 },
  52         /* 537600 */ { 1065642, 8144, -940, 808, -21583, 226 },
  53         /* 614400 */ { 1107534, 8144, -940, 808, -21583, 226 },
  54         /* 691200 */ { 1149425, 8144, -940, 808, -21583, 226 },
  55         /* 768000 */ { 1191317, 8144, -940, 808, -21583, 226 },
  56         /* 844800 */ { 1233208, 8144, -940, 808, -21583, 226 },
  57         /* 921600 */ { 1275100, 8144, -940, 808, -21583, 226 },
  58         /* 998400 */ { 1316991, 8144, -940, 808, -21583, 226 },
  59 };
  60
  61 static const u32 speedo_to_vmin[] = {
  62         /*   0,      1,      2,      3,      4, */
  63         950000, 840000, 818750, 840000, 810000,
  64 };
  65
  66 int
  67 gm20b_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
  68 {
  69         struct nvkm_device_tegra *tdev = device->func->tegra(device);
  70         struct gk20a_volt *volt;
  71         u32 vmin;
  72
  73         if (tdev->gpu_speedo_id >= ARRAY_SIZE(speedo_to_vmin)) {
  74                 nvdev_error(device, "unsupported speedo %d\n",
  75                             tdev->gpu_speedo_id);
  76                 return -EINVAL;
  77         }
  78
  79         volt = kzalloc(sizeof(*volt), GFP_KERNEL);
  80         if (!volt)
  81                 return -ENOMEM;
  82         *pvolt = &volt->base;
  83
  84         vmin = speedo_to_vmin[tdev->gpu_speedo_id];
  85
  86         if (tdev->gpu_speedo_id >= 1)
  87                 return gk20a_volt_ctor(device, index, gm20b_na_cvb_coef,
  88                                      ARRAY_SIZE(gm20b_na_cvb_coef), vmin, volt);
  89         else
  90                 return gk20a_volt_ctor(device, index, gm20b_cvb_coef,
  91                                         ARRAY_SIZE(gm20b_cvb_coef), vmin, volt);
  92 }