Commit c595637f authored by Evan Quan's avatar Evan Quan Committed by Alex Deucher
Browse files

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



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

Signed-off-by: default avatarEvan Quan <evan.quan@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 94a86ba2

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c

+2 −2
Original line number Diff line number Diff line
@@ -1261,7 +1261,8 @@ 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)
@@ -1271,7 +1272,6 @@ 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),