drivers/gpu/drm/amd/amdgpu/iceland_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 "iceland_smum.h"
  28
  29 MODULE_FIRMWARE("amdgpu/topaz_smc.bin");
  30
  31 static void iceland_dpm_set_funcs(struct amdgpu_device *adev);
  32
  33 static int iceland_dpm_early_init(void *handle)
  34 {
  35         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  36
  37         iceland_dpm_set_funcs(adev);
  38
  39         return 0;
  40 }
  41
  42 static int iceland_dpm_init_microcode(struct amdgpu_device *adev)
  43 {
  44         char fw_name[30] = "amdgpu/topaz_smc.bin";
  45         int err;
  46
  47         err = request_firmware(&adev->pm.fw, fw_name, adev->dev);
  48         if (err)
  49                 goto out;
  50         err = amdgpu_ucode_validate(adev->pm.fw);
  51
  52 out:
  53         if (err) {
  54                 DRM_ERROR("Failed to load firmware \"%s\"", fw_name);
  55                 release_firmware(adev->pm.fw);
  56                 adev->pm.fw = NULL;
  57         }
  58         return err;
  59 }
  60
  61 static int iceland_dpm_sw_init(void *handle)
  62 {
  63         int ret;
  64         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  65
  66         ret = iceland_dpm_init_microcode(adev);
  67         if (ret)
  68                 return ret;
  69
  70         return 0;
  71 }
  72
  73 static int iceland_dpm_sw_fini(void *handle)
  74 {
  75         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  76
  77         release_firmware(adev->pm.fw);
  78         adev->pm.fw = NULL;
  79
  80         return 0;
  81 }
  82
  83 static int iceland_dpm_hw_init(void *handle)
  84 {
  85         int ret;
  86         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  87
  88         mutex_lock(&adev->pm.mutex);
  89
  90         /* smu init only needs to be called at startup, not resume.
  91          * It should be in sw_init, but requires the fw info gathered
  92          * in sw_init from other IP modules.
  93          */
  94         ret = iceland_smu_init(adev);
  95         if (ret) {
  96                 DRM_ERROR("SMU initialization failed\n");
  97                 goto fail;
  98         }
  99
 100         ret = iceland_smu_start(adev);
 101         if (ret) {
 102                 DRM_ERROR("SMU start failed\n");
 103                 goto fail;
 104         }
 105
 106         mutex_unlock(&adev->pm.mutex);
 107         return 0;
 108
 109 fail:
 110         adev->firmware.smu_load = false;
 111         mutex_unlock(&adev->pm.mutex);
 112         return -EINVAL;
 113 }
 114
 115 static int iceland_dpm_hw_fini(void *handle)
 116 {
 117         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 118
 119         mutex_lock(&adev->pm.mutex);
 120         /* smu fini only needs to be called at teardown, not suspend.
 121          * It should be in sw_fini, but we put it here for symmetry
 122          * with smu init.
 123          */
 124         iceland_smu_fini(adev);
 125         mutex_unlock(&adev->pm.mutex);
 126         return 0;
 127 }
 128
 129 static int iceland_dpm_suspend(void *handle)
 130 {
 131         return 0;
 132 }
 133
 134 static int iceland_dpm_resume(void *handle)
 135 {
 136         int ret;
 137         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 138
 139         mutex_lock(&adev->pm.mutex);
 140
 141         ret = iceland_smu_start(adev);
 142         if (ret) {
 143                 DRM_ERROR("SMU start failed\n");
 144                 goto fail;
 145         }
 146
 147 fail:
 148         mutex_unlock(&adev->pm.mutex);
 149         return ret;
 150 }
 151
 152 static int iceland_dpm_set_clockgating_state(void *handle,
 153                         enum amd_clockgating_state state)
 154 {
 155         return 0;
 156 }
 157
 158 static int iceland_dpm_set_powergating_state(void *handle,
 159                         enum amd_powergating_state state)
 160 {
 161         return 0;
 162 }
 163
 164 const struct amd_ip_funcs iceland_dpm_ip_funcs = {
 165         .name = "iceland_dpm",
 166         .early_init = iceland_dpm_early_init,
 167         .late_init = NULL,
 168         .sw_init = iceland_dpm_sw_init,
 169         .sw_fini = iceland_dpm_sw_fini,
 170         .hw_init = iceland_dpm_hw_init,
 171         .hw_fini = iceland_dpm_hw_fini,
 172         .suspend = iceland_dpm_suspend,
 173         .resume = iceland_dpm_resume,
 174         .is_idle = NULL,
 175         .wait_for_idle = NULL,
 176         .soft_reset = NULL,
 177         .set_clockgating_state = iceland_dpm_set_clockgating_state,
 178         .set_powergating_state = iceland_dpm_set_powergating_state,
 179 };
 180
 181 static const struct amdgpu_dpm_funcs iceland_dpm_funcs = {
 182         .get_temperature = NULL,
 183         .pre_set_power_state = NULL,
 184         .set_power_state = NULL,
 185         .post_set_power_state = NULL,
 186         .display_configuration_changed = NULL,
 187         .get_sclk = NULL,
 188         .get_mclk = NULL,
 189         .print_power_state = NULL,
 190         .debugfs_print_current_performance_level = NULL,
 191         .force_performance_level = NULL,
 192         .vblank_too_short = NULL,
 193         .powergate_uvd = NULL,
 194 };
 195
 196 static void iceland_dpm_set_funcs(struct amdgpu_device *adev)
 197 {
 198         if (NULL == adev->pm.funcs)
 199                 adev->pm.funcs = &iceland_dpm_funcs;
 200 }