drivers/gpu/drm/radeon/trinity_smc.c

   1 /*
   2  * Copyright 2012 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 "drmP.h"
  25 #include "radeon.h"
  26 #include "trinityd.h"
  27 #include "trinity_dpm.h"
  28 #include "ppsmc.h"
  29
  30 static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
  31 {
  32         int i;
  33         u32 v = 0;
  34
  35         WREG32(SMC_MESSAGE_0, id);
  36         for (i = 0; i < rdev->usec_timeout; i++) {
  37                 if (RREG32(SMC_RESP_0) != 0)
  38                         break;
  39                 udelay(1);
  40         }
  41         v = RREG32(SMC_RESP_0);
  42
  43         if (v != 1) {
  44                 if (v == 0xFF) {
  45                         DRM_ERROR("SMC failed to handle the message!\n");
  46                         return -EINVAL;
  47                 } else if (v == 0xFE) {
  48                         DRM_ERROR("Unknown SMC message!\n");
  49                         return -EINVAL;
  50                 }
  51         }
  52
  53         return 0;
  54 }
  55
  56 int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
  57 {
  58         if (enable)
  59                 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
  60         else
  61                 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
  62 }
  63
  64 int trinity_dpm_config(struct radeon_device *rdev, bool enable)
  65 {
  66         if (enable)
  67                 WREG32_SMC(SMU_SCRATCH0, 1);
  68         else
  69                 WREG32_SMC(SMU_SCRATCH0, 0);
  70
  71         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
  72 }
  73
  74 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
  75 {
  76         WREG32_SMC(SMU_SCRATCH0, n);
  77
  78         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
  79 }
  80
  81 int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
  82 {
  83         WREG32_SMC(SMU_SCRATCH0, n);
  84
  85         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
  86 }
  87
  88 int trinity_uvd_dpm_config(struct radeon_device *rdev)
  89 {
  90         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
  91 }
  92
  93 int trinity_dpm_no_forced_level(struct radeon_device *rdev)
  94 {
  95         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
  96 }
  97
  98 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
  99                                           bool enable)
 100 {
 101         if (enable)
 102                 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
 103         else
 104                 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
 105 }
 106
 107 int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
 108 {
 109         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
 110 }
 111
 112 void trinity_acquire_mutex(struct radeon_device *rdev)
 113 {
 114         int i;
 115
 116         WREG32(SMC_INT_REQ, 1);
 117         for (i = 0; i < rdev->usec_timeout; i++) {
 118                 if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
 119                         break;
 120                 udelay(1);
 121         }
 122 }
 123
 124 void trinity_release_mutex(struct radeon_device *rdev)
 125 {
 126         WREG32(SMC_INT_REQ, 0);
 127 }