drm/radeon/trinity_smc.c

0001 /*
0002  * Copyright 2012 Advanced Micro Devices, Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  */
0023
0024 #include "radeon.h"
0025 #include "trinityd.h"
0026 #include "trinity_dpm.h"
0027 #include "ppsmc.h"
0028
0029 static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
0030 {
0031     int i;
0032     u32 v = 0;
0033
0034     WREG32(SMC_MESSAGE_0, id);
0035     for (i = 0; i < rdev->usec_timeout; i++) {
0036         if (RREG32(SMC_RESP_0) != 0)
0037             break;
0038         udelay(1);
0039     }
0040     v = RREG32(SMC_RESP_0);
0041
0042     if (v != 1) {
0043         if (v == 0xFF) {
0044             DRM_ERROR("SMC failed to handle the message!\n");
0045             return -EINVAL;
0046         } else if (v == 0xFE) {
0047             DRM_ERROR("Unknown SMC message!\n");
0048             return -EINVAL;
0049         }
0050     }
0051
0052     return 0;
0053 }
0054
0055 int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
0056 {
0057     if (enable)
0058         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
0059     else
0060         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
0061 }
0062
0063 int trinity_dpm_config(struct radeon_device *rdev, bool enable)
0064 {
0065     if (enable)
0066         WREG32_SMC(SMU_SCRATCH0, 1);
0067     else
0068         WREG32_SMC(SMU_SCRATCH0, 0);
0069
0070     return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
0071 }
0072
0073 int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
0074 {
0075     WREG32_SMC(SMU_SCRATCH0, n);
0076
0077     return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
0078 }
0079
0080 int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
0081 {
0082     WREG32_SMC(SMU_SCRATCH0, n);
0083
0084     return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
0085 }
0086
0087 int trinity_uvd_dpm_config(struct radeon_device *rdev)
0088 {
0089     return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
0090 }
0091
0092 int trinity_dpm_no_forced_level(struct radeon_device *rdev)
0093 {
0094     return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
0095 }
0096
0097 int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
0098                       bool enable)
0099 {
0100     if (enable)
0101         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
0102     else
0103         return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
0104 }
0105
0106 int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
0107 {
0108     return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
0109 }
0110
0111 void trinity_acquire_mutex(struct radeon_device *rdev)
0112 {
0113     int i;
0114
0115     WREG32(SMC_INT_REQ, 1);
0116     for (i = 0; i < rdev->usec_timeout; i++) {
0117         if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
0118             break;
0119         udelay(1);
0120     }
0121 }
0122
0123 void trinity_release_mutex(struct radeon_device *rdev)
0124 {
0125     WREG32(SMC_INT_REQ, 0);
0126 }