ACPI_EV_DISPLAY_SWITCH  229 drivers/gpu/drm/gma500/opregion.c #define ACPI_EV_DISPLAY_SWITCH (1<<0)
ACPI_EV_DISPLAY_SWITCH  614 drivers/gpu/drm/i915/display/intel_opregion.c #define ACPI_EV_DISPLAY_SWITCH (1<<0)