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drm/amd/pm: correct the reference clock for fan speed(rpm) calculation

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commit 6fea87637b upstream.

Correct the reference clock as 25Mhz for SMU13 fan speed calculation.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0.x, 6.1.x
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Evan Quan
2022-12-16 17:12:53 +08:00
committed by Greg Kroah-Hartman
parent 9196eb7c52
commit b435f68e41
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
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@@ -1258,7 +1258,8 @@ int smu_v13_0_set_fan_speed_rpm(struct smu_context *smu,
uint32_t speed)
{
struct amdgpu_device *adev = smu->adev;
uint32_t tach_period, crystal_clock_freq;
uint32_t crystal_clock_freq = 2500;
uint32_t tach_period;
int ret;
if (!speed)
@@ -1268,7 +1269,6 @@ int smu_v13_0_set_fan_speed_rpm(struct smu_context *smu,
if (ret)
return ret;
crystal_clock_freq = amdgpu_asic_get_xclk(adev);
tach_period = 60 * crystal_clock_freq * 10000 / (8 * speed);
WREG32_SOC15(THM, 0, regCG_TACH_CTRL,
REG_SET_FIELD(RREG32_SOC15(THM, 0, regCG_TACH_CTRL),