CLKGATE_DIS_PSL
I915_WRITE(CLKGATE_DIS_PSL(pipe),
I915_WRITE(CLKGATE_DIS_PSL(pipe),
I915_READ(CLKGATE_DIS_PSL(pipe)) &
u32 val = I915_READ(CLKGATE_DIS_PSL(pipe));
I915_WRITE(CLKGATE_DIS_PSL(pipe), val);