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Bluetooth: controller: Included transport latency in LE_Big_Established

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Included missing transport_latency_BIG information in HCI
LE_Big_established message.

Signed-off-by: Nirosharn Amarasinghe <niag@demant.com>
This commit is contained in:
Nirosharn Amarasinghe 2024-02-21 14:15:53 +01:00 • committed by Anas Nashif
commit 1a640e4711
1 changed files with 28 additions and 2 deletions
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30
subsys/bluetooth/controller/hci/hci.c
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@ -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;