Re: [PATCH] drm/amdgpu: Revert "drm/amdgpu: getting fan speed pwm for vega10 properly"

[Yury Zhuravlev <stalkerg@xxxxxxxxx>]

It's working 100% time correctly on my Vega 56 it was a reason why I did it because without it returns mostly random data.

On Fri, Oct 14, 2022 at 1:15 PM Asher Song <Asher.Song@xxxxxxx> wrote:

This reverts commit fe01cb24b81c0091d7e5668874d51ce913e44a97.

Unfortunately, that commit causes fan monitors can't be read and written
properly.

Signed-off-by: Asher Song <Asher.Song@xxxxxxx>
---
 .../amd/pm/powerplay/hwmgr/vega10_thermal.c   | 25 ++++++++++---------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_thermal.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_thermal.c
index 190af79f3236..dad3e3741a4e 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_thermal.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_thermal.c
@@ -67,21 +67,22 @@ int vega10_fan_ctrl_get_fan_speed_info(struct pp_hwmgr *hwmgr,
 int vega10_fan_ctrl_get_fan_speed_pwm(struct pp_hwmgr *hwmgr,
                uint32_t *speed)
 {
-       struct amdgpu_device *adev = hwmgr->adev;
-       uint32_t duty100, duty;
-       uint64_t tmp64;
+       uint32_t current_rpm;
+       uint32_t percent = 0;

-       duty100 = REG_GET_FIELD(RREG32_SOC15(THM, 0, mmCG_FDO_CTRL1),
-                               CG_FDO_CTRL1, FMAX_DUTY100);
-       duty = REG_GET_FIELD(RREG32_SOC15(THM, 0, mmCG_THERMAL_STATUS),
-                               CG_THERMAL_STATUS, FDO_PWM_DUTY);
+       if (hwmgr->thermal_controller.fanInfo.bNoFan)
+               return 0;

-       if (!duty100)
-               return -EINVAL;
+       if (vega10_get_current_rpm(hwmgr, &current_rpm))
+               return -1;
+
+       if (hwmgr->thermal_controller.
+                       advanceFanControlParameters.usMaxFanRPM != 0)
+               percent = current_rpm * 255 /
+                       hwmgr->thermal_controller.
+                       advanceFanControlParameters.usMaxFanRPM;

-       tmp64 = (uint64_t)duty * 255;
-       do_div(tmp64, duty100);
-       *speed = MIN((uint32_t)tmp64, 255);
+       *speed = MIN(percent, 255);

        return 0;
 }
--
2.25.1