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drm/amdgpu/swsmu: add smu11 helper to get manual fan speed (v2)

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Will be used to fetch the fan speeds when manual fan mode is
set.

v2: squash in a Coverity fix from Colin Ian King

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2020-08-25 14:35:50 -04:00
parent 8d6e65adc2
commit 9a7fd01384
2 changed files with 24 additions and 0 deletions
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3
drivers/gpu/drm/amd/pm/inc/smu_v11_0.h
View File

@ -203,6 +203,9 @@ smu_v11_0_set_fan_control_mode(struct smu_context *smu,
int smu_v11_0_set_fan_speed_rpm(struct smu_context *smu,
uint32_t speed);
int smu_v11_0_get_fan_speed_rpm(struct smu_context *smu,
uint32_t *speed);
int smu_v11_0_set_xgmi_pstate(struct smu_context *smu,
uint32_t pstate);

21
drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
View File

@ -1153,6 +1153,27 @@ int smu_v11_0_set_fan_speed_rpm(struct smu_context *smu,
return ret;
}
int smu_v11_0_get_fan_speed_rpm(struct smu_context *smu,
uint32_t *speed)
{
struct amdgpu_device *adev = smu->adev;
uint32_t tach_period, crystal_clock_freq;
uint64_t tmp64;
tach_period = REG_GET_FIELD(RREG32_SOC15(THM, 0, mmCG_TACH_CTRL),
CG_TACH_CTRL, TARGET_PERIOD);
if (!tach_period)
return -EINVAL;
crystal_clock_freq = amdgpu_asic_get_xclk(adev);
tmp64 = (uint64_t)crystal_clock_freq * 60 * 10000;
do_div(tmp64, (tach_period * 8));
*speed = (uint32_t)tmp64;
return 0;
}
int smu_v11_0_set_xgmi_pstate(struct smu_context *smu,
uint32_t pstate)
{