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 struct trinity_ps *trinity_get_ps(struct radeon_ps *rps);
  31 struct trinity_power_info *trinity_get_pi(struct radeon_device *rdev);
  32
  33 static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
  34 {
  35         int i;
  36         u32 v = 0;
  37
  38         WREG32(SMC_MESSAGE_0, id);
  39         for (i = 0; i < rdev->usec_timeout; i++) {
  40                 if (RREG32(SMC_RESP_0) != 0)
  41                         break;
  42                 udelay(1);
  43         }
  44         v = RREG32(SMC_RESP_0);
  45
  46         if (v != 1) {
  47                 if (v == 0xFF) {
  48                         DRM_ERROR("SMC failed to handle the message!\n");
  49                         return -EINVAL;
  50                 } else if (v == 0xFE) {
  51                         DRM_ERROR("Unknown SMC message!\n");
  52                         return -EINVAL;
  53                 }
  54         }
  55
  56         return 0;
  57 }
  58
  59 int trinity_dpm_config(struct radeon_device *rdev, bool enable)
  60 {
  61         if (enable)
  62                 WREG32_SMC(SMU_SCRATCH0, 1);
  63         else
  64                 WREG32_SMC(SMU_SCRATCH0, 0);
  65
  66         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
  67 }
  68
  69 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
  70 {
  71         WREG32_SMC(SMU_SCRATCH0, n);
  72
  73         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
  74 }
  75
  76 int trinity_dpm_no_forced_level(struct radeon_device *rdev)
  77 {
  78         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
  79 }
  80
  81 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
  82                                           bool enable)
  83 {
  84         if (enable)
  85                 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
  86         else
  87                 return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
  88 }
  89
  90 int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
  91 {
  92         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
  93 }
  94
  95 void trinity_acquire_mutex(struct radeon_device *rdev)
  96 {
  97         int i;
  98
  99         WREG32(SMC_INT_REQ, 1);
 100         for (i = 0; i < rdev->usec_timeout; i++) {
 101                 if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
 102                         break;
 103                 udelay(1);
 104         }
 105 }
 106
 107 void trinity_release_mutex(struct radeon_device *rdev)
 108 {
 109         WREG32(SMC_INT_REQ, 0);
 110 }