Physical State Control

Physical State Control#

AMD SMI: Physical State Control

Functions
amdsmi_status_t	amdsmi_dev_reset_fan (amdsmi_device_handle device_handle, uint32_t sensor_ind)
	Reset the fan to automatic driver control. More...

amdsmi_status_t	amdsmi_dev_set_fan_speed (amdsmi_device_handle device_handle, uint32_t sensor_ind, uint64_t speed)
	Set the fan speed for the specified device with the provided speed, in RPMs. More...

Detailed Description

These functions provide control over the physical state of a device.

Function Documentation

◆ amdsmi_dev_reset_fan()

amdsmi_status_t amdsmi_dev_reset_fan	(	amdsmi_device_handle	device_handle,
		uint32_t	sensor_ind
	)

Reset the fan to automatic driver control.

This function returns control of the fan to the system

Parameters

[in]	device_handle	a device handle
[in]	sensor_ind	a 0-based sensor index. Normally, this will be 0. If a device has more than one sensor, it could be greater than 0.

Returns: amdsmi_status_t | AMDSMI_STATUS_SUCCESS on success, non-zero on fail

◆ amdsmi_dev_set_fan_speed()

amdsmi_status_t amdsmi_dev_set_fan_speed	(	amdsmi_device_handle	device_handle,
		uint32_t	sensor_ind,
		uint64_t	speed
	)

Set the fan speed for the specified device with the provided speed, in RPMs.

Given a device handle device_handle and a integer value indicating speed speed, this function will attempt to set the fan speed to speed. An error will be returned if the specified speed is outside the allowable range for the device. The maximum value is 255 and the minimum is 0.

Note: This function requires root access