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         return 0;
  75 }
  76
  77 static int tonga_dpm_hw_init(void *handle)
  78 {
  79         int ret;
  80         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
  81
  82         mutex_lock(&adev->pm.mutex);
  83
  84         /* smu init only needs to be called at startup, not resume.
  85          * It should be in sw_init, but requires the fw info gathered
  86          * in sw_init from other IP modules.
  87          */
  88         ret = tonga_smu_init(adev);
  89         if (ret) {
  90                 DRM_ERROR("SMU initialization failed\n");
  91                 goto fail;
  92         }
  93
  94         ret = tonga_smu_start(adev);
  95         if (ret) {
  96                 DRM_ERROR("SMU start failed\n");
  97                 goto fail;
  98         }
  99
 100         mutex_unlock(&adev->pm.mutex);
 101         return 0;
 102
 103 fail:
 104         adev->firmware.smu_load = false;
 105         mutex_unlock(&adev->pm.mutex);
 106         return -EINVAL;
 107 }
 108
 109 static int tonga_dpm_hw_fini(void *handle)
 110 {
 111         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 112
 113         mutex_lock(&adev->pm.mutex);
 114         /* smu fini only needs to be called at teardown, not suspend.
 115          * It should be in sw_fini, but we put it here for symmetry
 116          * with smu init.
 117          */
 118         tonga_smu_fini(adev);
 119         mutex_unlock(&adev->pm.mutex);
 120         return 0;
 121 }
 122
 123 static int tonga_dpm_suspend(void *handle)
 124 {
 125         return tonga_dpm_hw_fini(handle);
 126 }
 127
 128 static int tonga_dpm_resume(void *handle)
 129 {
 130         return tonga_dpm_hw_init(handle);
 131 }
 132
 133 static int tonga_dpm_set_clockgating_state(void *handle,
 134                         enum amd_clockgating_state state)
 135 {
 136         return 0;
 137 }
 138
 139 static int tonga_dpm_set_powergating_state(void *handle,
 140                         enum amd_powergating_state state)
 141 {
 142         return 0;
 143 }
 144
 145 const struct amd_ip_funcs tonga_dpm_ip_funcs = {
 146         .name = "tonga_dpm",
 147         .early_init = tonga_dpm_early_init,
 148         .late_init = NULL,
 149         .sw_init = tonga_dpm_sw_init,
 150         .sw_fini = tonga_dpm_sw_fini,
 151         .hw_init = tonga_dpm_hw_init,
 152         .hw_fini = tonga_dpm_hw_fini,
 153         .suspend = tonga_dpm_suspend,
 154         .resume = tonga_dpm_resume,
 155         .is_idle = NULL,
 156         .wait_for_idle = NULL,
 157         .soft_reset = NULL,
 158         .set_clockgating_state = tonga_dpm_set_clockgating_state,
 159         .set_powergating_state = tonga_dpm_set_powergating_state,
 160 };
 161
 162 static const struct amdgpu_dpm_funcs tonga_dpm_funcs = {
 163         .get_temperature = NULL,
 164         .pre_set_power_state = NULL,
 165         .set_power_state = NULL,
 166         .post_set_power_state = NULL,
 167         .display_configuration_changed = NULL,
 168         .get_sclk = NULL,
 169         .get_mclk = NULL,
 170         .print_power_state = NULL,
 171         .debugfs_print_current_performance_level = NULL,
 172         .force_performance_level = NULL,
 173         .vblank_too_short = NULL,
 174         .powergate_uvd = NULL,
 175 };
 176
 177 static void tonga_dpm_set_funcs(struct amdgpu_device *adev)
 178 {
 179         if (NULL == adev->pm.funcs)
 180                 adev->pm.funcs = &tonga_dpm_funcs;
 181 }