PIPE_LEGACY_BLC_EVENT_ENABLE  220 drivers/gpu/drm/gma500/opregion.c 		psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
PIPE_LEGACY_BLC_EVENT_ENABLE  221 drivers/gpu/drm/gma500/opregion.c 		psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);