FW_BLC_SELF_EN
was_enabled = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;
I915_WRITE(FW_BLC_SELF, enable ? FW_BLC_SELF_EN : 0);
was_enabled = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;
val = enable ? _MASKED_BIT_ENABLE(FW_BLC_SELF_EN) :
_MASKED_BIT_DISABLE(FW_BLC_SELF_EN);
wm->cxsr = I915_READ(FW_BLC_SELF) & FW_BLC_SELF_EN;