VGT_GS_PER_ES     538 drivers/gpu/drm/radeon/r600d.h #define	VGT_GS_PER_ES					0x88C8
VGT_GS_PER_ES     624 drivers/gpu/drm/radeon/rv770d.h #define	VGT_GS_PER_ES					0x88C8