If the BT SoC BT_EN is controlled by hardware, disable the AUTO_OFF
feature. Otherwise, BT will close the HCI layer except for the UART
after firmware download. However, the SoC remains active. If the SoC
sends a packet to the Host after firmware download, the Host cannot
respond since the HCI layer is closed, which will cause the firmware
to enter an incorrect state.
Signed-off-by: Shuai Zhang <quic_shuaz@xxxxxxxxxxx>
---
drivers/bluetooth/hci_qca.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index a2dc39c00..0cb70a3cf 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2483,6 +2483,15 @@ static int qca_serdev_probe(struct serdev_device *serdev)
set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
hdev->shutdown = qca_power_off;
}
+ /* If the BT SoC BT_EN is controlled by hardware, disable the AUTO_OFF
+ * feature. Otherwise, BT will close the HCI layer except for
+ * the UART after firmware download. However, the SoC remains active.
+ * If the SoC sends a packet to the Host after firmware download,
+ * the Host cannot respond since the HCI layer is closed, which will
+ * cause the firmware to enter an incorrect state.
+ */
+ else
+ hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
if (data) {
/* Wideband speech support must be set per driver since it can't
--
2.34.1
