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@@ -1043,8 +1043,10 @@ int rs780_dpm_force_performance_level(struct radeon_device *rdev,
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if (pi->voltage_control)
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rs780_force_voltage(rdev, pi->max_voltage);
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- WREG32_P(FVTHROT_FBDIV_REG1, 0, ~FORCE_FEEDBACK_DIV);
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- rs780_clk_scaling_enable(rdev, true);
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+ if (ps->sclk_high != ps->sclk_low) {
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+ WREG32_P(FVTHROT_FBDIV_REG1, 0, ~FORCE_FEEDBACK_DIV);
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+ rs780_clk_scaling_enable(rdev, true);
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+ }
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if (pi->voltage_control) {
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rs780_voltage_scaling_enable(rdev, true);
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