GMBUS_SLAVE_TIMEOUT_EN   72 drivers/gpu/drm/gma500/psb_intel_reg.h #define   GMBUS_SLAVE_TIMEOUT_EN (1<<4)
GMBUS_SLAVE_TIMEOUT_EN 3243 drivers/gpu/drm/i915/i915_reg.h #define   GMBUS_SLAVE_TIMEOUT_EN (1 << 4)