Commit 2c6306d0 authored by Vinayak Kariappa Chettimada's avatar Vinayak Kariappa Chettimada Committed by Carles Cufi
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Bluetooth: Controller: BT_CTLR_ISO_TX_BUFFER_SIZE from BT_ISO_TX_MTU 



Derive BT_CTLR_ISO_TX_BUFFER_SIZE from BT_ISO_TX_MTU to have
optimal Controller memory allocations.
BT_CTLR_ISO_TX_BUFFER_SIZE can be set lower than
BT_ISO_TX_MTU in which case upper layer can send fragmented
SDU to the Controller.

Signed-off-by: default avatarVinayak Kariappa Chettimada <vich@nordicsemi.no>
parent 3997479b

samples/bluetooth/broadcast_audio_source/overlay-bt_ll_sw_split.conf

+3 −7
Original line number Diff line number Diff line
@@ -14,11 +14,7 @@ CONFIG_BT_CTLR_ADV_ISO_PDU_LEN_MAX=155 
CONFIG_BT_CTLR_ADV_ISO_STREAM_MAX=2

CONFIG_BT_CTLR_ISOAL_SOURCES=2



# FIXME: Host needs CONFIG_BT_ISO_TX_MTU + 4 bytes for sequence number, and  optionally

# additional + 4 bytes for timestamp when not using BT_ISO_TIMESTAMP_NONE in bt_iso_chan_send(),

# otherwise Host tries to fragment ISO data.

# When Host is fixed, CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE can inherit the

# CONFIG_BT_ISO_TX_MTU value.

#

# Supports the highest SDU size required by any BAP LC3 presets (155)

# Support the highest SDU size required by any BAP LC3 presets (155) + 8 bytes of HCI ISO Data

# packet overhead (the Packet_Sequence_Number, ISO_SDU_Length, Packet_Status_Flag fields; and

# the optional Time_Stamp field, if supplied)

CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE=163

samples/bluetooth/central_iso/overlay-bt_ll_sw_split.conf

0 → 100644
+33 −0
Original line number Diff line number Diff line 
# Zephyr Bluetooth Controller

CONFIG_BT_LL_SW_SPLIT=y



# Zephyr Bluetooth LE Controller needs 16 event buffers to generate Extended

# Advertising Report for receiving the complete 1650 bytes of data

CONFIG_BT_BUF_EVT_RX_COUNT=16



# Set maximum scan data length for Extended Scanning in Bluetooth LE Controller

CONFIG_BT_CTLR_SCAN_DATA_LEN_MAX=1650



# Increase Zephyr Bluetooth LE Controller Rx buffer to receive complete chain

# of PDUs

CONFIG_BT_CTLR_RX_BUFFERS=9



# Sufficient ISO SDU and PDU length for this sample with ISO_TX_MTU of 247

CONFIG_BT_CTLR_CONN_ISO_SDU_LEN_MAX=247

CONFIG_BT_CTLR_CONN_ISO_PDU_LEN_MAX=251



# Number of supported streami sources and sinks

CONFIG_BT_CTLR_ISOAL_SOURCES=2

CONFIG_BT_CTLR_ISOAL_SINKS=1



# Support the highest SDU size required by this sample 247 + 8 bytes of HCI ISO Data

# packet overhead (timestamp and HCI ISO Data packet header)

CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE=255

CONFIG_BT_CTLR_ISO_TX_BUFFERS=4



# Use Low Latency Connected ISO policy

CONFIG_BT_CTLR_ADVANCED_FEATURES=y

CONFIG_BT_CTLR_CONN_ISO_LOW_LATENCY_POLICY=y



# Use the below if the sample is sending stale packet sequence number

# CONFIG_BT_CTLR_ISOAL_SN_STRICT=n

samples/bluetooth/central_iso/sample.yaml

+11 −0
Original line number Diff line number Diff line
@@ -8,3 +8,14 @@ tests: 
    integration_platforms:

      - qemu_x86

    tags: bluetooth

  sample.bluetooth.central_iso.bt_ll_sw_split:

    harness: bluetooth

    platform_allow:

      - qemu_cortex_m3

      - qemu_x86

      - nrf52_bsim

      - nrf52833dk/nrf52833

    integration_platforms:

      - nrf52833dk/nrf52833

    extra_args: OVERLAY_CONFIG=overlay-bt_ll_sw_split.conf

    tags: bluetooth

samples/bluetooth/hci_ipc/nrf5340_cpunet_bis-bt_ll_sw_split.conf

+2 −2
Original line number Diff line number Diff line
@@ -77,7 +77,7 @@ CONFIG_BT_CTLR_LLCP_LOCAL_PROC_CTX_BUF_NUM=6 
CONFIG_BT_CTLR_ADV_EXT=y

CONFIG_BT_CTLR_ADV_PERIODIC=y

CONFIG_BT_CTLR_ADV_ISO=y

CONFIG_BT_CTLR_ADV_ISO_PDU_LEN_MAX=251

CONFIG_BT_CTLR_ADV_ISO_PDU_LEN_MAX=247

CONFIG_BT_CTLR_ADV_ISO_STREAM_MAX=2



# ISO Receive Controller
@@ -89,7 +89,7 @@ CONFIG_BT_CTLR_SYNC_ISO_STREAM_MAX=2 


# ISO Transmissions

CONFIG_BT_CTLR_ISO_TX_BUFFERS=8

CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE=251

CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE=255

CONFIG_BT_CTLR_ISOAL_SOURCES=2



# ISO Receptions

samples/bluetooth/hci_ipc/nrf5340_cpunet_cis-bt_ll_sw_split.conf

+2 −2
Original line number Diff line number Diff line
@@ -77,12 +77,12 @@ CONFIG_BT_CTLR_LLCP_LOCAL_PROC_CTX_BUF_NUM=6 
# ISO Connection Oriented

CONFIG_BT_CTLR_CENTRAL_ISO=y

CONFIG_BT_CTLR_PERIPHERAL_ISO=y

CONFIG_BT_CTLR_CONN_ISO_SDU_LEN_MAX=251

CONFIG_BT_CTLR_CONN_ISO_SDU_LEN_MAX=247

CONFIG_BT_CTLR_CONN_ISO_PDU_LEN_MAX=251



# ISO Transmissions

CONFIG_BT_CTLR_ISO_TX_BUFFERS=8

CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE=251

CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE=255

CONFIG_BT_CTLR_ISOAL_SOURCES=2



# ISO Receptions

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