UTIL_PIN_CTL
I915_STATE_WARN(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,
val = I915_READ(UTIL_PIN_CTL);
I915_WRITE(UTIL_PIN_CTL, val);
I915_WRITE(UTIL_PIN_CTL, val | UTIL_PIN_PIPE(pipe) |
val = I915_READ(UTIL_PIN_CTL);
val = I915_READ(UTIL_PIN_CTL);
I915_WRITE(UTIL_PIN_CTL, val);
WARN_ONCE(I915_READ(UTIL_PIN_CTL) & UTIL_PIN_ENABLE,