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Attempt to fix bluetooth communication problem on rpi3b (#614)

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This problem is referenced in many different issues, some of them:
Bluetooth: hci0: Frame reassembly failed (-84)
https://github.com/raspberrypi/firmware/issues/1150

Error communicating with local bluetooth adapter (RPi3)
https://github.com/home-assistant/core/issues/30147

Xiaomi BLE Temperature and Humidity sensor no longer working after update from 0.95.4 to .096.5
https://github.com/home-assistant/core/issues/25704

Xiaomi BLE Temperature and Humidity sensor
https://github.com/home-assistant/core/issues/24313#issuecomment-578554315

Solution seemed to reeduce the boud rate of the serial connection to BT
on rpi3b where flow control is missing.

The patch to the original btuart file is to reduce the baudrate only for
rpi3b models where flow control is missing:

-		$HCIATTACH /dev/serial1 bcm43xx 921600 noflow - $BDADDR
+		$HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR

I'm not a buildroot expert but the best way seemed to move the
upstream btuart download in a PRE_PATCH_HOOK so that standard
buildroot way of patching can be applied.
This commit is contained in:
lucagiove 2020-03-31 11:03:14 +02:00 committed by GitHub
parent 2e7e039899
commit c371e45144
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 20 additions and 2 deletions
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16
buildroot-external/package/bluetooth-bcm43xx/0001-btuart-reduced-baud-rate-rpi3b.patch Normal file
View File

@ -0,0 +1,16 @@
Bluetooth: hci0: Frame reassembly failed (-84)
https://github.com/raspberrypi/firmware/issues/1150
Signed-off-by: Luca Giovenzana <luca@giovenzana.org>
--- btuart.orig 2020-03-25 03:05:24.491176583 +0100
+++ btuart 2020-03-25 03:05:43.603107833 +0100
@@ -19,7 +19,7 @@ if [ "$uart0" = "$serial1" ] ; then
if [ "$uart0_pins" = "16" ] ; then
$HCIATTACH /dev/serial1 bcm43xx 3000000 flow - $BDADDR
else
- $HCIATTACH /dev/serial1 bcm43xx 921600 noflow - $BDADDR
+ $HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR
fi
else
$HCIATTACH /dev/serial1 bcm43xx 460800 noflow - $BDADDR

2
buildroot-external/package/bluetooth-bcm43xx/Config.in
View File

@ -3,4 +3,4 @@ config BR2_PACKAGE_BLUETOOTH_BCM43XX
depends on BR2_PACKAGE_BLUEZ5_UTILS_CLIENT
select BR2_PACKAGE_BLUEZ5_UTILS_DEPRECATED
help
Install bluetooth for bcm43xx.
Install bluetooth for bcm43xx.

4
buildroot-external/package/bluetooth-bcm43xx/bluetooth-bcm43xx.mk
View File

@ -10,7 +10,7 @@ BLUETOOTH_BCM43XX_LICENSE_FILES = $(BR2_EXTERNAL_HASSOS_PATH)/../LICENSE
BLUETOOTH_BCM43XX_SITE = $(BR2_EXTERNAL_HASSOS_PATH)/package/bluetooth-bcm43xx
BLUETOOTH_BCM43XX_SITE_METHOD = local
define BLUETOOTH_BCM43XX_BUILD_CMDS
define BLUETOOTH_BCM43XX_FIRMWARE_AND_HELPERS_DOWNLOAD
curl -L -o $(@D)/BCM43430A1.hcd https://raw.githubusercontent.com/RPi-Distro/bluez-firmware/fff76cb15527c435ce99a9787848eacd6288282c/broadcom/BCM43430A1.hcd
curl -L -o $(@D)/BCM4345C0.hcd https://raw.githubusercontent.com/RPi-Distro/bluez-firmware/fff76cb15527c435ce99a9787848eacd6288282c/broadcom/BCM4345C0.hcd
curl -L -o $(@D)/btuart https://raw.githubusercontent.com/RPi-Distro/pi-bluetooth/cbdbcb66bcc5b9af05f1a9fffe2254c872bb0ace/usr/bin/btuart
@ -18,6 +18,8 @@ define BLUETOOTH_BCM43XX_BUILD_CMDS
curl -L -o $(@D)/90-pi-bluetooth.rules https://raw.githubusercontent.com/RPi-Distro/pi-bluetooth/cbdbcb66bcc5b9af05f1a9fffe2254c872bb0ace/lib/udev/rules.d/90-pi-bluetooth.rules
endef
BLUETOOTH_BCM43XX_PRE_PATCH_HOOKS += BLUETOOTH_BCM43XX_FIRMWARE_AND_HELPERS_DOWNLOAD
define BLUETOOTH_BCM43XX_INSTALL_TARGET_CMDS
$(INSTALL) -d $(TARGET_DIR)/etc/systemd/system/hassos-hardware.target.wants
$(INSTALL) -m 0644 $(@D)/bluetooth-bcm43xx.service $(TARGET_DIR)/usr/lib/systemd/system/