1*4882a593Smuzhiyun.. SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun 3*4882a593Smuzhiyun========================== 4*4882a593SmuzhiyunLink Power Managent Policy 5*4882a593Smuzhiyun========================== 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunThis parameter allows the user to set the link (interface) power management. 8*4882a593SmuzhiyunThere are 3 possible options: 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun===================== ===================================================== 11*4882a593SmuzhiyunValue Effect 12*4882a593Smuzhiyun===================== ===================================================== 13*4882a593Smuzhiyunmin_power Tell the controller to try to make the link use the 14*4882a593Smuzhiyun least possible power when possible. This may 15*4882a593Smuzhiyun sacrifice some performance due to increased latency 16*4882a593Smuzhiyun when coming out of lower power states. 17*4882a593Smuzhiyun 18*4882a593Smuzhiyunmax_performance Generally, this means no power management. Tell 19*4882a593Smuzhiyun the controller to have performance be a priority 20*4882a593Smuzhiyun over power management. 21*4882a593Smuzhiyun 22*4882a593Smuzhiyunmedium_power Tell the controller to enter a lower power state 23*4882a593Smuzhiyun when possible, but do not enter the lowest power 24*4882a593Smuzhiyun state, thus improving latency over min_power setting. 25*4882a593Smuzhiyun===================== ===================================================== 26