This page documents temporary workarounds and known issues for Bluetooth
on Qualcomm Linux. Each entry is expected to be removed once the proper fix
lands in a release. Don’t rely on the contents of this page for production
deployments.
Workarounds Change the Bluetooth chipset to QCC2072 on the Qualcomm Dragonwing IQ-9075 EVK By default, the Dragonwing IQ-9075 EVK has the WCN6855 chipset software. To use the QCC2072, apply the following changes.
Steps:
Save the following patch with the filename 0001-dts-change-bt-from-wcn6855-to-qcc2072.patch.
Subject: [PATCH] linux-qcom-6.18: Replace wcn6855 with qcc2072 Update the Bluetooth chip from wcn6855 to qcc2072 --- ...emans-evk-Change-bluetooth-from-wcn6.patch | 28 +++++++++++++++++++ recipes-kernel/linux/linux-qcom_6.18.bb | 1 + 2 files changed, 29 insertions(+) create mode 100644 recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch diff --git a/recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch b/recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch new file mode 100644 index 00000000..8e5ac1b2 --- /dev/null +++ b/recipes-kernel/linux/linux-qcom-6.18/0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch @@ -0,0 +1,28 @@ +Subject: [PATCH] arm64: dts: qcom: lemans-evk: Replace wcn6855 with qcc2072 + +Update the Bluetooth chip from wcn6855 to qcc2072. + +Upstream-Status: Pending +--- + arch/arm64/boot/dts/qcom/lemans-evk.dts | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/arch/arm64/boot/dts/qcom/lemans-evk.dts b/arch/arm64/boot/dts/qcom/lemans-evk.dts +index eec8b8a1d9ae..fc0b053f5c4b 100644 +--- a/arch/arm64/boot/dts/qcom/lemans-evk.dts ++++ b/arch/arm64/boot/dts/qcom/lemans-evk.dts +@@ -1099,7 +1099,7 @@ &uart17 { + status = "okay"; + + bluetooth: bluetooth { +- compatible = "qcom,wcn6855-bt"; ++ compatible = "qcom,qcc2072-bt"; + max-speed = <3200000>; + + vddrfacmn-supply = <&vreg_wcn_3p3>; +-- +2.34.1 + diff --git a/recipes-kernel/linux/linux-qcom_6.18.bb b/recipes-kernel/linux/linux-qcom_6.18.bb index a1762ea5..82068146 100644 --- a/recipes-kernel/linux/linux-qcom_6.18.bb +++ b/recipes-kernel/linux/linux-qcom_6.18.bb @@ -25,6 +25,7 @@ SRCBRANCH:class-devupstream ?= "branch=qcom-6.18.y" SRC_URI = " \ git://github.com/qualcomm-linux/kernel.git;${SRCBRANCH};protocol=https \ file://0001-tools-use-basename-to-identify-file-in-gen-mach-type.patch \ + file://0001-arm64-dts-qcom-lemans-evk-Change-bluetooth-from-wcn6.patch \ " # Additional kernel configs. -- 2.34.1
Apply the patch to the meta-qcom tree.
Build and flash the image.
Push the following firmware files to the device. The files can be obtained from the linux-firmware repository .
ornbcscal11.bin → /lib/firmware/qca/ornbcscal11.binornbtfw11.tlv → /lib/firmware/qca/ornbtfw11.tlvornnv11.bin → /lib/firmware/qca/ornnv11.bin
Reboot the device.
After the device boots, QCC2072 Bluetooth comes up and operates as expected.
Known issues No entries yet. 
