PROP_ID_TRISTATE
{"nvidia,tristate", PROP_ID_TRISTATE},
if (cfg->params[PROP_ID_TRISTATE] != -1) {
reg |= (cfg->params[PROP_ID_TRISTATE] & 1) <<
{"nvidia,tristate", PROP_ID_TRISTATE},
if (cfg->params[PROP_ID_TRISTATE] != -1) {
reg |= (cfg->params[PROP_ID_TRISTATE] & 1) <<