drm/radeon/kms/pm: track current voltage (v2)

[mv-sheeva.git] / drivers / gpu / drm / radeon / evergreen.c

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 49c94aef0dda9b2459d845ad24da6e091365fa11..b86d6ac9c5bafa1b796f2dd7a9152a1d44134aeb 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -45,8 +45,12 @@ void evergreen_pm_misc(struct radeon_device *rdev)
        struct radeon_power_state *ps = &rdev->pm.power_state[requested_index];
        struct radeon_voltage *voltage = &ps->clock_info[0].voltage;
 
-       if ((voltage->type == VOLTAGE_SW) && voltage->voltage)
-               radeon_atom_set_voltage(rdev, voltage->voltage);
+       if ((voltage->type == VOLTAGE_SW) && voltage->voltage) {
+               if (voltage->voltage != rdev->pm.current_vddc) {
+                       radeon_atom_set_voltage(rdev, voltage->voltage);
+                       rdev->pm.current_vddc = voltage->voltage;
+               }
+       }
 }
 
 void evergreen_pm_prepare(struct radeon_device *rdev)