| Mauro Carvalho Chehab | cbbc70a | 2020-03-02 09:15:53 +0100 | [diff] [blame] | 1 | .. SPDX-License-Identifier: GPL-2.0 |
| 2 | |
| 3 | ========================== |
| 4 | Link Power Managent Policy |
| 5 | ========================== |
| 6 | |
| Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 7 | This parameter allows the user to set the link (interface) power management. |
| 8 | There are 3 possible options: |
| 9 | |
| Mauro Carvalho Chehab | cbbc70a | 2020-03-02 09:15:53 +0100 | [diff] [blame] | 10 | ===================== ===================================================== |
| Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 11 | Value Effect |
| Mauro Carvalho Chehab | cbbc70a | 2020-03-02 09:15:53 +0100 | [diff] [blame] | 12 | ===================== ===================================================== |
| Kristen Carlson Accardi | ca77329 | 2007-10-25 00:58:59 -0400 | [diff] [blame] | 13 | min_power Tell the controller to try to make the link use the |
| 14 | least possible power when possible. This may |
| 15 | sacrifice some performance due to increased latency |
| 16 | when coming out of lower power states. |
| 17 | |
| 18 | max_performance Generally, this means no power management. Tell |
| 19 | the controller to have performance be a priority |
| 20 | over power management. |
| 21 | |
| 22 | medium_power Tell the controller to enter a lower power state |
| 23 | when possible, but do not enter the lowest power |
| 24 | state, thus improving latency over min_power setting. |
| Mauro Carvalho Chehab | cbbc70a | 2020-03-02 09:15:53 +0100 | [diff] [blame] | 25 | ===================== ===================================================== |