trxcon: handle_tbf_cfg_req(): properly set TSC for lchans

Before this patch all Uplink PDCH bursts were using TSC=0.

Change-Id: I58b2da0d285b9a3e444374a30276fbaab3b784ac
Related: OS#5500
---
M src/host/trxcon/include/osmocom/bb/trxcon/trxcon.h
M src/host/trxcon/src/trxcon_fsm.c
2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/src/host/trxcon/include/osmocom/bb/trxcon/trxcon.h b/src/host/trxcon/include/osmocom/bb/trxcon/trxcon.h
index 3d85d59..ff54e78 100644
--- a/src/host/trxcon/include/osmocom/bb/trxcon/trxcon.h
+++ b/src/host/trxcon/include/osmocom/bb/trxcon/trxcon.h
@@ -34,6 +34,7 @@
 	struct {
 		uint16_t band_arfcn;
 		uint8_t tx_power;
+		uint8_t tsc; /* only valid for DCCH/PDCH */
 		int8_t ta;
 	} l1p;
 
diff --git a/src/host/trxcon/src/trxcon_fsm.c b/src/host/trxcon/src/trxcon_fsm.c
index 29caeef..f6c9a05 100644
--- a/src/host/trxcon/src/trxcon_fsm.c
+++ b/src/host/trxcon/src/trxcon_fsm.c
@@ -369,6 +369,9 @@
 		return;
 	}
 
+	/* Store TSC for subsequent PDCH timeslot activation(s) */
+	trxcon->l1p.tsc = req->tsc;
+
 	if (config == GSM_PCHAN_PDCH)
 		osmo_fsm_inst_state_chg(fi, TRXCON_ST_PACKET_DATA, 0, 0);
 	else
@@ -522,15 +525,20 @@
 	struct l1sched_state *sched = trxcon->sched;
 
 	if (active) {
+		struct l1sched_lchan_state *lchan;
+		struct l1sched_ts *ts;
+
 		if (sched->ts[tn] != NULL) /* already enabled */
 			return;
 		if (l1sched_configure_ts(sched, tn, GSM_PCHAN_PDCH) != 0)
 			return;
 		OSMO_ASSERT(sched->ts[tn] != NULL);
+		ts = sched->ts[tn];
 
-		l1sched_activate_lchan(sched->ts[tn], L1SCHED_PDTCH);
-		l1sched_activate_lchan(sched->ts[tn], L1SCHED_PTCCH);
-		/* FIXME: set TSC for both lchans */
+		l1sched_activate_lchan(ts, L1SCHED_PDTCH);
+		l1sched_activate_lchan(ts, L1SCHED_PTCCH);
+		llist_for_each_entry(lchan, &ts->lchans, list)
+			lchan->tsc = trxcon->l1p.tsc;
 	} else {
 		l1sched_del_ts(sched, tn);
 	}

