drivers/gpu/drm/amd/amdgpu/tonga_dpm.c

   1 /*
   2  * Copyright 2014 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
  24 #include <linux/firmware.h>
  25 #include "drmP.h"
  26 #include "amdgpu.h"
  27 #include "tonga_smum.h"
  28
  29 MODULE_FIRMWARE("amdgpu/tonga_smc.bin");
  30
  31 static void tonga_dpm_set_funcs(struct amdgpu_device *adev);
  32
  33 static int tonga_dpm_early_init(void *handle)
  34 {
  35         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  36
  37         tonga_dpm_set_funcs(adev);
  38
  39         return 0;
  40 }
  41
  42 static int tonga_dpm_init_microcode(struct amdgpu_device *adev)
  43 {
  44         char fw_name[30] = "amdgpu/tonga_smc.bin";
  45         int err;
  46         err = request_firmware(&adev->pm.fw, fw_name, adev->dev);
  47         if (err)
  48                 goto out;
  49         err = amdgpu_ucode_validate(adev->pm.fw);
  50
  51 out:
  52         if (err) {
  53                 DRM_ERROR("Failed to load firmware \"%s\"", fw_name);
  54                 release_firmware(adev->pm.fw);
  55                 adev->pm.fw = NULL;
  56         }
  57         return err;
  58 }
  59
  60 static int tonga_dpm_sw_init(void *handle)
  61 {
  62         int ret;
  63         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  64
  65         ret = tonga_dpm_init_microcode(adev);
  66         if (ret)
  67                 return ret;
  68
  69         return 0;
  70 }
  71
  72 static int tonga_dpm_sw_fini(void *handle)
  73 {
  74         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  75
  76         release_firmware(adev->pm.fw);
  77         adev->pm.fw = NULL;
  78
  79         return 0;
  80 }
  81
  82 static int tonga_dpm_hw_init(void *handle)
  83 {
  84         int ret;
  85         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  86
  87         mutex_lock(&adev->pm.mutex);
  88
  89         /* smu init only needs to be called at startup, not resume.
  90          * It should be in sw_init, but requires the fw info gathered
  91          * in sw_init from other IP modules.
  92          */
  93         ret = tonga_smu_init(adev);
  94         if (ret) {
  95                 DRM_ERROR("SMU initialization failed\n");
  96                 goto fail;
  97         }
  98
  99         ret = tonga_smu_start(adev);
 100         if (ret) {
 101                 DRM_ERROR("SMU start failed\n");
 102                 goto fail;
 103         }
 104
 105         mutex_unlock(&adev->pm.mutex);
 106         return 0;
 107
 108 fail:
 109         adev->firmware.smu_load = false;
 110         mutex_unlock(&adev->pm.mutex);
 111         return -EINVAL;
 112 }
 113
 114 static int tonga_dpm_hw_fini(void *handle)
 115 {
 116         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 117
 118         mutex_lock(&adev->pm.mutex);
 119         /* smu fini only needs to be called at teardown, not suspend.
 120          * It should be in sw_fini, but we put it here for symmetry
 121          * with smu init.
 122          */
 123         tonga_smu_fini(adev);
 124         mutex_unlock(&adev->pm.mutex);
 125         return 0;
 126 }
 127
 128 static int tonga_dpm_suspend(void *handle)
 129 {
 130         return tonga_dpm_hw_fini(handle);
 131 }
 132
 133 static int tonga_dpm_resume(void *handle)
 134 {
 135         return tonga_dpm_hw_init(handle);
 136 }
 137
 138 static int tonga_dpm_set_clockgating_state(void *handle,
 139                         enum amd_clockgating_state state)
 140 {
 141         return 0;
 142 }
 143
 144 static int tonga_dpm_set_powergating_state(void *handle,
 145                         enum amd_powergating_state state)
 146 {
 147         return 0;
 148 }
 149
 150 const struct amd_ip_funcs tonga_dpm_ip_funcs = {
 151         .name = "tonga_dpm",
 152         .early_init = tonga_dpm_early_init,
 153         .late_init = NULL,
 154         .sw_init = tonga_dpm_sw_init,
 155         .sw_fini = tonga_dpm_sw_fini,
 156         .hw_init = tonga_dpm_hw_init,
 157         .hw_fini = tonga_dpm_hw_fini,
 158         .suspend = tonga_dpm_suspend,
 159         .resume = tonga_dpm_resume,
 160         .is_idle = NULL,
 161         .wait_for_idle = NULL,
 162         .soft_reset = NULL,
 163         .set_clockgating_state = tonga_dpm_set_clockgating_state,
 164         .set_powergating_state = tonga_dpm_set_powergating_state,
 165 };
 166
 167 static const struct amdgpu_dpm_funcs tonga_dpm_funcs = {
 168         .get_temperature = NULL,
 169         .pre_set_power_state = NULL,
 170         .set_power_state = NULL,
 171         .post_set_power_state = NULL,
 172         .display_configuration_changed = NULL,
 173         .get_sclk = NULL,
 174         .get_mclk = NULL,
 175         .print_power_state = NULL,
 176         .debugfs_print_current_performance_level = NULL,
 177         .force_performance_level = NULL,
 178         .vblank_too_short = NULL,
 179         .powergate_uvd = NULL,
 180 };
 181
 182 static void tonga_dpm_set_funcs(struct amdgpu_device *adev)
 183 {
 184         if (NULL == adev->pm.funcs)
 185                 adev->pm.funcs = &tonga_dpm_funcs;
 186 }