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Bluetooth: qca: Fix the WCN3950 NVM baud rate offset

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WCN3950 uses the HCI transport tag layout that stores the UART baud rate
at byte 1, like WCN3991. However, QCA_WCN3950 precedes QCA_WCN3991 in
qca_btsoc_type, so qca_tlv_check_data() writes the baud rate to byte 2
instead.

On a Motorola Moto G10 with WCN3950 and cmnv12.bin, configuring a 3 Mbps
UART therefore leaves the NVM baud rate at its default 3.2 Mbps and
overwrites the following byte. Firmware download completes, but the
subsequent HCI_RESET times out and Bluetooth initialization fails.

Include WCN3950 in the byte-1 case so the NVM baud rate matches the host
UART without altering the following transport parameter.

Fixes: d5712c511c ("Bluetooth: qca: add WCN3950 support")
Cc: stable@vger.kernel.org
Assisted-by: LLM
Signed-off-by: Michael McAllister <me@michaelmcallister.org>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Michael McAllister 2026-10-21 20:51:12 +01:00 committed by Luiz Augusto von Dentz
parent 7eac806143
commit 5b7d0386a4
1 changed files with 2 additions and 1 deletions
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3
drivers/bluetooth/btqca.c
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@ -426,7 +426,8 @@ static int qca_tlv_check_data(struct hci_dev *hdev,
tlv_nvm->data[0] |= 0x80;
/* UART Baud Rate */
if (soc_type >= QCA_WCN3991)
if (soc_type == QCA_WCN3950 ||
soc_type >= QCA_WCN3991)
tlv_nvm->data[1] = nvm_baud_rate;
else
tlv_nvm->data[2] = nvm_baud_rate;