enum dc_status status = DC_ERROR_UNEXPECTED;
for (i = 0; i < dc->link_count; i++) {
- if (dc->links[i]->connector_signal != SIGNAL_TYPE_DISPLAY_PORT) {
+ if (dc->links[i]->connector_signal != SIGNAL_TYPE_DISPLAY_PORT)
continue;
- }
- /* if any of the displays are lit up turn them off */
- status = core_link_read_dpcd(dc->links[i], DP_SET_POWER,
- &dpcd_power_state, sizeof(dpcd_power_state));
- if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0) {
- dp_receiver_power_ctrl(dc->links[i], false);
+
+ /*
+ * core_link_read_dpcd() will invoke dm_helpers_dp_read_dpcd(),
+ * which needs to read dpcd info with the help of aconnector.
+ * If aconnector (dc->links[i]->prev) is NULL, then dpcd status
+ * cannot be read.
+ */
+ if (dc->links[i]->priv) {
+ /* if any of the displays are lit up turn them off */
+ status = core_link_read_dpcd(dc->links[i], DP_SET_POWER,
+ &dpcd_power_state, sizeof(dpcd_power_state));
+ if (status == DC_OK && dpcd_power_state == DP_POWER_STATE_D0)
+ dp_receiver_power_ctrl(dc->links[i], false);
}
}
}