drm/radeon/kms/pm: don't enable pm if there is only on power state
authorAlex Deucher <alexdeucher@gmail.com>
Wed, 24 Mar 2010 15:32:29 +0000 (11:32 -0400)
committerDave Airlie <airlied@redhat.com>
Tue, 18 May 2010 08:21:05 +0000 (18:21 +1000)
Just adds overhead when the power state will never change.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
drivers/gpu/drm/radeon/radeon_pm.c

index a137ee2f722cf640aa94616ea7e72faaabded297..811126464a7ba625a532538450a7e64080743426 100644 (file)
@@ -113,7 +113,7 @@ int radeon_pm_init(struct radeon_device *rdev)
 
        INIT_DELAYED_WORK(&rdev->pm.idle_work, radeon_pm_idle_work_handler);
 
-       if (radeon_dynpm != -1 && radeon_dynpm) {
+       if ((radeon_dynpm != -1 && radeon_dynpm) && (rdev->pm.num_power_states > 1)) {
                rdev->pm.state = PM_STATE_PAUSED;
                DRM_INFO("radeon: dynamic power management enabled\n");
        }