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Bluetooth: controller: Fix ULL_HIGH priority to be lower than LLL

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Fix the default ULL_HIGH execution priority to be lower than
LLL execution priority to reduce Radio ISR service latency.

Also, default to Zero Latency IRQ for Radio ISR if enabled
in the kernel.

Fixes #29994.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2021-01-28 20:35:31 +05:30 • committed by Anas Nashif
commit 30634334a8
1 changed files with 4 additions and 2 deletions
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6
subsys/bluetooth/controller/Kconfig.ll_sw_split
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@ -211,6 +211,7 @@ config BT_CTLR_SCAN_ENABLE_STRICT
config BT_CTLR_ZLI
bool "Use Zero Latency IRQs"
depends on ZERO_LATENCY_IRQS
default y
help
Enable support for use of Zero Latency IRQ feature. Note, applications
shall not use Zero Latency IRQ themselves when this option is selected,
@ -273,7 +274,7 @@ config BT_CTLR_SCHED_ADVANCED
leading to skipped events amongst active roles.
config BT_CTLR_LLL_PRIO
int "Lower Link Layer (Radio) IRQ priority"
int "Lower Link Layer (Radio) IRQ priority" if !BT_CTLR_ZLI
range 0 3 if SOC_SERIES_NRF51X
range 0 6 if (SOC_SERIES_NRF52X || SOC_SERIES_NRF53X)
default 0
@ -284,7 +285,8 @@ config BT_CTLR_ULL_HIGH_PRIO
int "Upper Link Layer High IRQ priority"
range BT_CTLR_LLL_PRIO 3 if SOC_SERIES_NRF51X
range BT_CTLR_LLL_PRIO 6 if (SOC_SERIES_NRF52X || SOC_SERIES_NRF53X)
default BT_CTLR_LLL_PRIO
default BT_CTLR_LLL_PRIO if (BT_CTLR_ZLI || BT_CTLR_LOW_LAT_ULL)
default 1
help
The interrupt priority for Ticker's Worker IRQ and Upper Link Layer
higher priority functions.