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_smumgr.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         return 0;
  76 }
  77
  78 static int iceland_dpm_hw_init(void *handle)
  79 {
  80         int ret;
  81         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  82
  83         mutex_lock(&adev->pm.mutex);
  84
  85         /* smu init only needs to be called at startup, not resume.
  86          * It should be in sw_init, but requires the fw info gathered
  87          * in sw_init from other IP modules.
  88          */
  89         ret = iceland_smu_init(adev);
  90         if (ret) {
  91                 DRM_ERROR("SMU initialization failed\n");
  92                 goto fail;
  93         }
  94
  95         ret = iceland_smu_start(adev);
  96         if (ret) {
  97                 DRM_ERROR("SMU start failed\n");
  98                 goto fail;
  99         }
 100
 101         mutex_unlock(&adev->pm.mutex);
 102         return 0;
 103
 104 fail:
 105         adev->firmware.smu_load = false;
 106         mutex_unlock(&adev->pm.mutex);
 107         return -EINVAL;
 108 }
 109
 110 static int iceland_dpm_hw_fini(void *handle)
 111 {
 112         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 113
 114         mutex_lock(&adev->pm.mutex);
 115         /* smu fini only needs to be called at teardown, not suspend.
 116          * It should be in sw_fini, but we put it here for symmetry
 117          * with smu init.
 118          */
 119         iceland_smu_fini(adev);
 120         mutex_unlock(&adev->pm.mutex);
 121         return 0;
 122 }
 123
 124 static int iceland_dpm_suspend(void *handle)
 125 {
 126         return 0;
 127 }
 128
 129 static int iceland_dpm_resume(void *handle)
 130 {
 131         int ret;
 132         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 133
 134         mutex_lock(&adev->pm.mutex);
 135
 136         ret = iceland_smu_start(adev);
 137         if (ret) {
 138                 DRM_ERROR("SMU start failed\n");
 139                 goto fail;
 140         }
 141
 142 fail:
 143         mutex_unlock(&adev->pm.mutex);
 144         return ret;
 145 }
 146
 147 static int iceland_dpm_set_clockgating_state(void *handle,
 148                         enum amd_clockgating_state state)
 149 {
 150         return 0;
 151 }
 152
 153 static int iceland_dpm_set_powergating_state(void *handle,
 154                         enum amd_powergating_state state)
 155 {
 156         return 0;
 157 }
 158
 159 const struct amd_ip_funcs iceland_dpm_ip_funcs = {
 160         .early_init = iceland_dpm_early_init,
 161         .late_init = NULL,
 162         .sw_init = iceland_dpm_sw_init,
 163         .sw_fini = iceland_dpm_sw_fini,
 164         .hw_init = iceland_dpm_hw_init,
 165         .hw_fini = iceland_dpm_hw_fini,
 166         .suspend = iceland_dpm_suspend,
 167         .resume = iceland_dpm_resume,
 168         .is_idle = NULL,
 169         .wait_for_idle = NULL,
 170         .soft_reset = NULL,
 171         .print_status = NULL,
 172         .set_clockgating_state = iceland_dpm_set_clockgating_state,
 173         .set_powergating_state = iceland_dpm_set_powergating_state,
 174 };
 175
 176 static const struct amdgpu_dpm_funcs iceland_dpm_funcs = {
 177         .get_temperature = NULL,
 178         .pre_set_power_state = NULL,
 179         .set_power_state = NULL,
 180         .post_set_power_state = NULL,
 181         .display_configuration_changed = NULL,
 182         .get_sclk = NULL,
 183         .get_mclk = NULL,
 184         .print_power_state = NULL,
 185         .debugfs_print_current_performance_level = NULL,
 186         .force_performance_level = NULL,
 187         .vblank_too_short = NULL,
 188         .powergate_uvd = NULL,
 189 };
 190
 191 static void iceland_dpm_set_funcs(struct amdgpu_device *adev)
 192 {
 193         if (NULL == adev->pm.funcs)
 194                 adev->pm.funcs = &iceland_dpm_funcs;
 195 }