diff options
Diffstat (limited to 'drivers/gpu/drm/amd/pm/amdgpu_pm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/pm/amdgpu_pm.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c index 060a38e30878..84e1af6a6ce7 100644 --- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c @@ -3745,6 +3745,62 @@ static umode_t fan_target_temperature_visible(struct amdgpu_device *adev) return umode; } +/** + * DOC: fan_minimum_pwm + * + * The amdgpu driver provides a sysfs API for checking and adjusting the + * minimum fan speed in PWM. + * + * Reading back the file shows you the current setting and the permitted + * ranges if changable. + * + * Writing an integer to the file, change the setting accordingly. + * + * When you have finished the editing, write "c" (commit) to the file to commit + * your changes. + * + * This setting works under auto fan control mode only. It can co-exist with + * other settings which can work also under auto mode. It adjusts the PMFW's + * behavior about the minimum fan speed in PWM the fan should spin. Setting + * via this interface will switch the fan control to auto mode implicitly. + */ +static ssize_t fan_minimum_pwm_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + struct od_kobj *container = container_of(kobj, struct od_kobj, kobj); + struct amdgpu_device *adev = (struct amdgpu_device *)container->priv; + + return (ssize_t)amdgpu_retrieve_od_settings(adev, OD_FAN_MINIMUM_PWM, buf); +} + +static ssize_t fan_minimum_pwm_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, + size_t count) +{ + struct od_kobj *container = container_of(kobj, struct od_kobj, kobj); + struct amdgpu_device *adev = (struct amdgpu_device *)container->priv; + + return (ssize_t)amdgpu_distribute_custom_od_settings(adev, + PP_OD_EDIT_FAN_MINIMUM_PWM, + buf, + count); +} + +static umode_t fan_minimum_pwm_visible(struct amdgpu_device *adev) +{ + umode_t umode = 0000; + + if (adev->pm.od_feature_mask & OD_OPS_SUPPORT_FAN_MINIMUM_PWM_RETRIEVE) + umode |= S_IRUSR | S_IRGRP | S_IROTH; + + if (adev->pm.od_feature_mask & OD_OPS_SUPPORT_FAN_MINIMUM_PWM_SET) + umode |= S_IWUSR; + + return umode; +} + static struct od_feature_set amdgpu_od_set = { .containers = { [0] = { @@ -3782,6 +3838,14 @@ static struct od_feature_set amdgpu_od_set = { .store = fan_target_temperature_store, }, }, + [4] = { + .name = "fan_minimum_pwm", + .ops = { + .is_visible = fan_minimum_pwm_visible, + .show = fan_minimum_pwm_show, + .store = fan_minimum_pwm_store, + }, + }, }, }, }, |