drm/radeon/dpm/rs780: don't enable sclk scaling if not required

[~andy/linux] / drivers / gpu / drm / radeon / rs780_dpm.c

diff --git a/drivers/gpu/drm/radeon/rs780_dpm.c b/drivers/gpu/drm/radeon/rs780_dpm.c
index 31487ce294cfafc069065da559d01546033494cf..eb336bf5a54e91e79ad45b290632e495e6a2bb0a 100644 (file)
--- a/drivers/gpu/drm/radeon/rs780_dpm.c
+++ b/drivers/gpu/drm/radeon/rs780_dpm.c
@@ -499,6 +499,9 @@ static void rs780_activate_engine_clk_scaling(struct radeon_device *rdev,
            (new_state->sclk_low == old_state->sclk_low))
                return;
 
+       if (new_state->sclk_high == new_state->sclk_low)
+               return;
+
        rs780_clk_scaling_enable(rdev, true);
 }