DBUF_CTL_S
i915_reg_t reg = DBUF_CTL_S(slice);
intel_de_rmw(display, DBUF_CTL_S(slice),
intel_de_rmw(display, DBUF_CTL_S(slice),
if (intel_de_read(display, DBUF_CTL_S(slice)) & DBUF_POWER_STATE)
MMIO_DH(DBUF_CTL_S(0), D_SKL_PLUS, NULL, gen9_dbuf_ctl_mmio_write);
MMIO_D(DBUF_CTL_S(0));