TRANS_CHICKEN2
reg = TRANS_CHICKEN2(pipe);
intel_de_rmw(display, TRANS_CHICKEN2(pipe),
val = intel_de_read(display, TRANS_CHICKEN2(PIPE_A));
intel_de_write(display, TRANS_CHICKEN2(PIPE_A), val);
intel_de_rmw(display, TRANS_CHICKEN2(PIPE_A), TRANS_CHICKEN2_TIMING_OVERRIDE, 0);
val = intel_uncore_read(&i915->uncore, TRANS_CHICKEN2(pipe));
intel_uncore_write(&i915->uncore, TRANS_CHICKEN2(pipe), val);