C_028800_Z_ENABLE 1887 drivers/gpu/drm/radeon/evergreend.h #define   C_028800_Z_ENABLE                            0xFFFFFFFD
C_028800_Z_ENABLE 2335 drivers/gpu/drm/radeon/r600d.h #define   C_028800_Z_ENABLE                            0xFFFFFFFD