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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ef4e036584
bapm is a power management feature for handling the power budget between the CPU and GPU on APUs. This patch adds support for enabling or disabling it. For now disable it by default. Enabling it properly requires quite a bit more work and will be addressed in a separate patch. This patch fixes hangs on boot on certain trinity laptops when the system is on battery power. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
/*
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* Copyright 2012 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "drmP.h"
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#include "radeon.h"
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#include "trinityd.h"
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#include "trinity_dpm.h"
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#include "ppsmc.h"
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struct trinity_ps *trinity_get_ps(struct radeon_ps *rps);
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struct trinity_power_info *trinity_get_pi(struct radeon_device *rdev);
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static int trinity_notify_message_to_smu(struct radeon_device *rdev, u32 id)
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{
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int i;
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u32 v = 0;
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WREG32(SMC_MESSAGE_0, id);
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for (i = 0; i < rdev->usec_timeout; i++) {
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if (RREG32(SMC_RESP_0) != 0)
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break;
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udelay(1);
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}
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v = RREG32(SMC_RESP_0);
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if (v != 1) {
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if (v == 0xFF) {
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DRM_ERROR("SMC failed to handle the message!\n");
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return -EINVAL;
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} else if (v == 0xFE) {
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DRM_ERROR("Unknown SMC message!\n");
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return -EINVAL;
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}
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}
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return 0;
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}
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int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
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{
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if (enable)
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
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else
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
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}
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int trinity_dpm_config(struct radeon_device *rdev, bool enable)
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{
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if (enable)
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WREG32_SMC(SMU_SCRATCH0, 1);
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else
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WREG32_SMC(SMU_SCRATCH0, 0);
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
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}
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int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
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{
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WREG32_SMC(SMU_SCRATCH0, n);
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
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}
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int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
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{
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WREG32_SMC(SMU_SCRATCH0, n);
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
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}
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int trinity_uvd_dpm_config(struct radeon_device *rdev)
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{
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
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}
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int trinity_dpm_no_forced_level(struct radeon_device *rdev)
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{
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
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}
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int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
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bool enable)
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{
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if (enable)
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
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else
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
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}
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int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
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{
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return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
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}
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void trinity_acquire_mutex(struct radeon_device *rdev)
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{
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int i;
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WREG32(SMC_INT_REQ, 1);
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for (i = 0; i < rdev->usec_timeout; i++) {
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if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
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break;
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udelay(1);
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}
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}
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void trinity_release_mutex(struct radeon_device *rdev)
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{
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WREG32(SMC_INT_REQ, 0);
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}
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