drm/amdgpu: Disable sysfs pwm1 if not in manual fan control

Following lm-sensors 3.0.0,
Only enable pwm1 sysfs when fan control mode(pwm1_enable)
in manual

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index a9f68753ec7f..68548fbdee09 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -1120,12 +1120,19 @@ static ssize_t amdgpu_hwmon_set_pwm1(struct device *dev,
         struct amdgpu_device *adev = dev_get_drvdata(dev);
         int err;
         u32 value;
+        u32 pwm_mode;
 
         /* Can't adjust fan when the card is off */
         if  ((adev->flags & AMD_IS_PX) &&
              (adev->ddev->switch_power_state != DRM_SWITCH_POWER_ON))
                 return -EINVAL;
 
+        pwm_mode = amdgpu_dpm_get_fan_control_mode(adev);
+        if (pwm_mode != AMD_FAN_CTRL_MANUAL) {
+                pr_info("manual fan speed control should be enabled first\n");
+                return -EINVAL;
+        }
+
         err = kstrtou32(buf, 10, &value);
         if (err)
                 return err;