IO: Cleanup DSM input routine

src/modules/px4iofirmware/controls.c

@@ -73,16 +73,15 @@ static unsigned _rssi_adc_counts = 0;
 
 bool dsm_port_input(uint16_t *rssi, bool *dsm_updated, bool *st24_updated, bool *sumd_updated)
 {
-	perf_begin(c_gather_dsm);
-	uint16_t temp_count = r_raw_rc_count;
+    perf_begin(c_gather_dsm);
 	uint8_t n_bytes = 0;
 	uint8_t *bytes;
-	*dsm_updated = dsm_input(r_raw_rc_values, &temp_count, &n_bytes, &bytes, PX4IO_RC_INPUT_CHANNELS);
+    bool dsm_11_bit;
+    *dsm_updated = dsm_input(_dsm_fd, r_raw_rc_values, &r_raw_rc_count, &dsm_11_bit, &n_bytes, &bytes, PX4IO_RC_INPUT_CHANNELS);
 
-	if (*dsm_updated) {
-		r_raw_rc_count = temp_count & 0x7fff;
+    if (*dsm_updated) {
 
-		if (temp_count & 0x8000) {
+        if (dsm_11_bit) {
 			r_raw_rc_flags |= PX4IO_P_RAW_RC_FLAGS_RC_DSM11;
 
 		} else {