Since bumping from 5.3.x to 5.4-rcX I have seen a bluetooth failure on all Amlogic SoC boards that I test with, using a range of different Ampak (Broadcom) SDIO modules. The following is from a board with BCM4359 wireless/BT (SDIO): VIM3:~ # dmesg | grep -i Blue [ 5.594409] Bluetooth: Core ver 2.22 [ 5.594500] Bluetooth: HCI device and connection manager initialized [ 5.594515] Bluetooth: HCI socket layer initialized [ 5.594520] Bluetooth: L2CAP socket layer initialized [ 5.594537] Bluetooth: SCO socket layer initialized [ 5.625023] Bluetooth: HCI UART driver ver 2.3 [ 5.625031] Bluetooth: HCI UART protocol H4 registered [ 5.626880] Bluetooth: HCI UART protocol Broadcom registered [ 5.627042] Bluetooth: HCI UART protocol QCA registered [ 5.869597] Bluetooth: hci1: Frame reassembly failed (-84) [ 5.869671] Bluetooth: hci1: Frame reassembly failed (-84) [ 7.944140] Bluetooth: hci1: command 0xfc18 tx timeout [ 16.050803] Bluetooth: hci1: BCM: failed to write update baudrate (-110) [ 16.050808] Bluetooth: hci1: Failed to set baudrate [ 18.184134] Bluetooth: hci1: command 0x0c03 tx timeout [ 26.077475] Bluetooth: hci1: BCM: Reset failed (-110) Kernel defconfig: https://github.com/chewitt/LibreELEC.tv/blob/amlogic-master/projects/Amlogic/linux/linux.aarch64.conf Kernelci Amlogic images (https://kernelci.org/soc/amlogic/job/amlogic/) are showing the same "Frame reassembly failed (-84)” error. This sounds similar: https://www.spinics.net/lists/linux-bluetooth/msg81600.html but modules will use hci_bcm not hci_qca. Any ideas? Christian
