AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2025-03-08 20:05:10 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/amd/powerplay: wrong control mode cause the fan spins faster unnecessarily

Browse Source 
The fan control mode can either be FDO_PWM_MODE_STATIC or FDO_PWM_MODE_STATIC_RPM.
Setting it as AMD_FAN_CTRL_AUTO will cause the fan spin faster wrongly.

This can be reproduced by:
'# cat /sys/class/hwmon/hwmon0/pwm1
   38
'# cat /sys/class/hwmon/hwmon0/pwm1_enable
   2
'# echo "2" > /sys/class/hwmon/hwmon0/pwm1_enable
'# cat /sys/class/hwmon/hwmon0/pwm1
   122
The fan speed get faster wrongly even with its original mode echo back.

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
This commit is contained in:
Evan Quan 2017-11-01 16:52:08 +08:00 committed by Alex Deucher
parent 7b38a49d75
commit 710931c2be
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
View File

@ -4234,7 +4234,7 @@ static void vega10_set_fan_control_mode(struct pp_hwmgr *hwmgr, uint32_t mode)
vega10_fan_ctrl_stop_smc_fan_control(hwmgr);
break;
case AMD_FAN_CTRL_AUTO:
if (!vega10_fan_ctrl_set_static_mode(hwmgr, mode))
if (PP_CAP(PHM_PlatformCaps_MicrocodeFanControl))
vega10_fan_ctrl_start_smc_fan_control(hwmgr);
break;
default: