RADEON_SCLK_MORE_FORCEON
tmp |= RADEON_SCLK_MORE_FORCEON;
tmp |= RADEON_SCLK_MORE_FORCEON;
tmp &= ~RADEON_SCLK_MORE_FORCEON;
tmp &= ~RADEON_SCLK_MORE_FORCEON;
tmp |= RADEON_SCLK_MORE_FORCEON;