MG_PLL_TDC_COLDST_BIAS
I915_READ(MG_PLL_TDC_COLDST_BIAS(port));
val = I915_READ(MG_PLL_TDC_COLDST_BIAS(port));
I915_WRITE(MG_PLL_TDC_COLDST_BIAS(port), val);
POSTING_READ(MG_PLL_TDC_COLDST_BIAS(port));