Bug 197121

Summary:	Bluetooth regression "no bluetooth adapters found" Baytrail T100CHI (SDIO) BCM4324B3
Product:	Drivers	Reporter:	jbMacAZ (jbMacBrodie)
Component:	Bluetooth	Assignee:	linux-bluetooth (linux-bluetooth)
Status:	RESOLVED DOCUMENTED
Severity:	blocking	CC:	loic.poulain
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	4.14-{rc1,rc2,rc3}	Subsystem:
Regression:	No	Bisected commit-id:

Description jbMacAZ 2017-10-03 19:08:48 UTC

Bluetooth no longer works in 4.14.  Starting Blueman device manager with kernel 4.14-rc1 produces the error "No bluetooth adapters found".  Bluetooth has been working on the T100CHI since 4.3.5 [patched with bt deviceID until 4.7].  The CHI uses bluetooth to connect to its keyboard/touchpad.

Reverting first bad commit 33cd149e767be9afbab9fcd3d5165a2de62313c8 does not fix bluetooth.  (See report below)

Excerpt from dmesg 4.13 vs. 4.14 shows that the bluetooth binary blob is not being loaded in 4.14.  The Asus T100CHI uses the brcmfmac43241b4-sdio chip.

4.13$ dmesg | grep -i blue
[    6.158598] Bluetooth: Core ver 2.22
[    6.158639] Bluetooth: HCI device and connection manager initialized
[    6.158646] Bluetooth: HCI socket layer initialized
[    6.158650] Bluetooth: L2CAP socket layer initialized
[    6.158662] Bluetooth: SCO socket layer initialized
[    6.176397] Bluetooth: HCI UART driver ver 2.3
[    6.176401] Bluetooth: HCI UART protocol H4 registered
[    6.176402] Bluetooth: HCI UART protocol BCSP registered
[    6.176403] Bluetooth: HCI UART protocol ATH3K registered
[    6.176405] Bluetooth: HCI UART protocol Three-wire (H5) registered
[    6.176501] Bluetooth: HCI UART protocol Intel registered
[    6.196331] Bluetooth: BCM2E71:00: Asus T100CHI: Overwriting IRQ polarity to active low
[    6.196415] Bluetooth: HCI UART protocol Broadcom registered
[    6.196417] Bluetooth: HCI UART protocol QCA registered
[    7.321304] Bluetooth: hci0: BCM: chip id 84
[    7.321309] Bluetooth: hci0: BCM4324B3 (002.004.006) build 0000
[    7.857971] Bluetooth: hci0: BCM (002.004.006) build 0112
[    7.935107] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    7.935110] Bluetooth: BNEP filters: protocol multicast
[    7.935119] Bluetooth: BNEP socket layer initialized
[   10.429274] Bluetooth: RFCOMM TTY layer initialized
[   10.429285] Bluetooth: RFCOMM socket layer initialized
[   10.429297] Bluetooth: RFCOMM ver 1.11

4.14
[    7.135356] Bluetooth: Core ver 2.22
[    7.135394] Bluetooth: HCI device and connection manager initialized
[    7.136202] Bluetooth: HCI socket layer initialized
[    7.136206] Bluetooth: L2CAP socket layer initialized
[    7.136220] Bluetooth: SCO socket layer initialized
[    7.197479] Bluetooth: HCI UART driver ver 2.3
[    7.197483] Bluetooth: HCI UART protocol H4 registered
[    7.197484] Bluetooth: HCI UART protocol BCSP registered
[    7.197485] Bluetooth: HCI UART protocol ATH3K registered
[    7.197486] Bluetooth: HCI UART protocol Three-wire (H5) registered
[    7.197610] Bluetooth: HCI UART protocol Intel registered
[    7.197611] Bluetooth: HCI UART protocol QCA registered
[   10.658881] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   10.658884] Bluetooth: BNEP filters: protocol multicast
[   10.658891] Bluetooth: BNEP socket layer initialized

33cd149e767be9afbab9fcd3d5165a2de62313c8 is the first bad commit
commit 33cd149e767be9afbab9fcd3d5165a2de62313c8
Author: Loic Poulain <loic.poulain@gmail.com>
Date:   Thu Aug 17 19:59:51 2017 +0200

    Bluetooth: hci_bcm: Add serdev support
    
    Add basic support for Broadcom serial slave devices.
    Probe the serial device, retrieve its maximum speed and
    register a new hci uart device.
    
    Tested/compatible with bcm43438 (RPi3).
    
    Signed-off-by: Loic Poulain <loic.poulain@gmail.com>
    Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

:040000 040000 3af031525c70a2aeece054513df42905b5735e38 355ed6de455f3063c1ce3ad132fd115705f55b08 M	drivers

Comment 1 Loic Poulain 2017-10-03 19:39:22 UTC

Seems that you did not included BCM HCI UART protocol:
CONFIG_BT_HCIUART_BCM

This now depends on CONFIG_BT_HCIUART_SERDEV which depends on CONFIG_SERIAL_DEV_BUS.

Comment 2 jbMacAZ 2017-10-03 21:41:52 UTC

Thank you.  The new dependencies had turned off CONFIG_BT_HCIUART_BCM.