• Alex Deucher's avatar
    drm/radeon/kms/pm: rework power management · ce8f5370
    Alex Deucher authored
    - Separate dynpm and profile based power management methods.  You can select the pm method
      by echoing the selected method ("dynpm" or "profile") to power_method in sysfs.
    - Expose basic 4 profile in profile method
      "default" - default clocks
      "auto" - select between low and high based on ac/dc state
      "low" - DC, low power mode
      "high" - AC, performance mode
      The current base profile is "default", but it should switched to "auto" once we've tested
      on more systems.  Switching the state is a matter of echoing the requested profile to
      power_profile in sysfs.  The lowest power states are selected automatically when dpms turns
      the monitors off in all states but default.
    - Remove dynamic fence-based reclocking for the moment.  We can revisit this later once we
      have basic pm in.
    - Move pm init/fini to modesetting path.  pm is tightly coupled with display state.  Make sure
      display side is initialized before pm.
    - Add pm suspend/resume functions to make sure pm state is properly reinitialized on resume.
    - Remove dynpm module option.  It's now selectable via sysfs.
    Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
    Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
    ce8f5370
radeon_pm.c 22 KB