Will be used to fetch the fan speeds when manual fan mode is
set.
v2: squash in a Coverity fix from Colin Ian King
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
drivers/gpu/drm/amd/pm/inc/smu_v11_0.h | 3 +++
.../gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c | 21 +++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/inc/smu_v11_0.h b/drivers/gpu/drm/amd/pm/inc/smu_v11_0.h
index 8307e2b790da..1f9575a4dfe7 100644
--- a/drivers/gpu/drm/amd/pm/inc/smu_v11_0.h
+++ b/drivers/gpu/drm/amd/pm/inc/smu_v11_0.h
@@ -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);
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
index 5abc06f7c9f3..f5aeb0b5cf97 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
@@ -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)
{
--
2.25.4
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