LXR linux/drivers/gpu/drm/radeon/trinity

   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
  30struct trinity_ps *trinity_get_ps(struct radeon_ps *rps);
  31struct trinity_power_info *trinity_get_pi(struct radeon_device *rdev);
  32
  33static 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
  59int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
  60{
  61        if (enable)
  62                return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
  63        else
  64                return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
  65}
  66
  67int trinity_dpm_config(struct radeon_device *rdev, bool enable)
  68{
  69        if (enable)
  70                WREG32_SMC(SMU_SCRATCH0, 1);
  71        else
  72                WREG32_SMC(SMU_SCRATCH0, 0);
  73
  74        return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
  75}
  76
  77int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
  78{
  79        WREG32_SMC(SMU_SCRATCH0, n);
  80
  81        return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
  82}
  83
  84int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
  85{
  86        WREG32_SMC(SMU_SCRATCH0, n);
  87
  88        return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
  89}
  90
  91int trinity_uvd_dpm_config(struct radeon_device *rdev)
  92{
  93        return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
  94}
  95
  96int trinity_dpm_no_forced_level(struct radeon_device *rdev)
  97{
  98        return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
  99}
 100
 101int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
 102                                          bool enable)
 103{
 104        if (enable)
 105                return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
 106        else
 107                return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
 108}
 109
 110int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
 111{
 112        return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
 113}
 114
 115void trinity_acquire_mutex(struct radeon_device *rdev)
 116{
 117        int i;
 118
 119        WREG32(SMC_INT_REQ, 1);
 120        for (i = 0; i < rdev->usec_timeout; i++) {
 121                if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
 122                        break;
 123                udelay(1);
 124        }
 125}
 126
 127void trinity_release_mutex(struct radeon_device *rdev)
 128{
 129        WREG32(SMC_INT_REQ, 0);
 130}
 131