MBUS_ABOX_CTL    4215 drivers/gpu/drm/i915/display/intel_display_power.c 	val = I915_READ(MBUS_ABOX_CTL);
MBUS_ABOX_CTL    4221 drivers/gpu/drm/i915/display/intel_display_power.c 	I915_WRITE(MBUS_ABOX_CTL, val);