[PATCH v2 0/1] Bluetooth: hci_ll: Enable BROKEN_ENHANCED_SETUP_SYNC_CONN for WL183x

[Stefano Radaelli]

While validating SCO audio on a platform using TI WL183x Bluetooth
modules with the hci_ll driver, we observed failures when the
HCI Enhanced Setup Synchronous Connection command was used.

Although the controller advertises support for the command, SCO setup
fails in certain configurations (e.g. BT_VOICE_TRANSPARENT/mSBC).
This matches the scenario described in commit 05abad857277
("Bluetooth: HCI: Add HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN quirk").

Initially, we considered setting the
HCI_QUIRK_BROKEN_ENHANCED_SETUP_SYNC_CONN quirk unconditionally in
hci_ll. However, this would affect all TI controllers handled by the
driver, including configurations where the enhanced setup command
works correctly.

To avoid hardcoding the quirk globally, we first proposed a DT-based
solution. Based on review feedback, the quirk is now enabled
automatically for the affected devices by deducing it from the
compatible string instead.

The issue has been observed on WL1831, WL1835 and WL1837 modules,
therefore the quirk is enabled for:
- "ti,wl1831-st"
- "ti,wl1835-st"
- "ti,wl1837-st"

This keeps the change limited to the affected WL183x family and avoids
impacting other TI controllers handled by hci_ll.

v1->v2:
 - Remove DT property, used compatible instead

v1:
Link: https://patchwork.kernel.org/project/bluetooth/patch/db4c7eab9d0c2f71eb61baff240957596f099401.1771847350.git.stefano.r@xxxxxxxxxxxxx/

Stefano Radaelli (1):
  Bluetooth: hci_ll: Enable BROKEN_ENHANCED_SETUP_SYNC_CONN for WL183x

 drivers/bluetooth/hci_ll.c | 10 ++++++++++
 1 file changed, 10 insertions(+)


base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
-- 
2.47.3