Bluetooth: controller: Included transport latency in LE_Big_Established (1a640e47) · Commits · Wenxi XU / zephyr

subsys/bluetooth/controller/hci/hci.c

+28 −2

Changes for subsys/bluetooth/controller/hci/hci.c: 28 added lines, 2 removed lines.
Original line number	Diff line number	Diff line
		@@ -7847,8 +7847,11 @@ static void le_big_sync_established(struct pdu_data *pdu,
		{
		struct bt_hci_evt_le_big_sync_established *sep;
		struct ll_sync_iso_set *sync_iso;
		uint32_t transport_latency_big;
		struct node_rx_sync_iso *se;
		struct lll_sync_iso *lll;
		uint32_t iso_interval_us;
		uint32_t big_sync_delay;
		size_t evt_size;
		void *node;

		@@ -7877,9 +7880,32 @@ static void le_big_sync_established(struct pdu_data *pdu,
		return;
		}

		/* FIXME: Fill latency */
		sys_put_le24(0, sep->latency);
		/* BT Core v5.4 - Vol 6, Part B, Section 4.4.6.4:
		* BIG_Sync_Delay = (Num_BIS – 1) × BIS_Spacing + (NSE – 1) × Sub_Interval + MPT.
		*
		* BT Core v5.4 - Vol 6, Part G, Section 3.2.1: (Framed)
		* Transport_Latenct_BIG = BIG_Sync_Delay + PTO × (NSE / BN – IRC) * ISO_Interval +
		* ISO_Interval + SDU_Interval
		*
		* BT Core v5.4 - Vol 6, Part G, Section 3.2.2: (Unframed)
		* Transport_Latenct_BIG = BIG_Sync_Delay + (PTO × (NSE / BN – IRC) + 1) * ISO_Interval -
		* SDU_Interval
		*/
		iso_interval_us = lll->iso_interval * ISO_INT_UNIT_US;
		big_sync_delay = ull_big_sync_delay(lll);
		if (lll->framing) {
		/* Framed */
		transport_latency_big = big_sync_delay +
		lll->pto * (lll->nse / lll->bn - lll->irc) *
		iso_interval_us + iso_interval_us + lll->sdu_interval;
		} else {
		/* Unframed */
		transport_latency_big = big_sync_delay +
		(lll->pto * (lll->nse / lll->bn - lll->irc) + 1) *
		iso_interval_us - lll->sdu_interval;
		}

		sys_put_le24(transport_latency_big, sep->latency);
		sep->nse = lll->nse;
		sep->bn = lll->bn;
		sep->pto = lll->pto;

Admin message