linux-kernel - Re: [PATCH v2 1/1] Bluetooth: btqca: Add WCN6855 firmware priority selection feature

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Message-ID: <967d99e5-7cc1-4f8c-8a1b-21b1bd096cb9@molgen.mpg.de>
Date: Fri, 14 Nov 2025 11:04:25 +0100
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Shuai Zhang <shuai.zhang@....qualcomm.com>
Cc: Bartosz Golaszewski <brgl@...ev.pl>, Marcel Holtmann
 <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>,
 linux-arm-msm@...r.kernel.org, linux-bluetooth@...r.kernel.org,
 linux-kernel@...r.kernel.org, cheng.jiang@....qualcomm.com,
 quic_chezhou@...cinc.com, wei.deng@....qualcomm.com, stable@...r.kernel.org
Subject: Re: [PATCH v2 1/1] Bluetooth: btqca: Add WCN6855 firmware priority
 selection feature

Dear Shuai,


Thank you for your patch.

Am 14.11.25 um 09:17 schrieb Shuai Zhang:
> The prefix "wcn" corresponds to the WCN685x chip, while entries without
> the "wcn" prefix correspond to the QCA2066 chip. There are some feature
> differences between the two.
> 
> However, due to historical reasons, WCN685x chip has been using firmware
> without the "wcn" prefix. The mapping between the chip and its
> corresponding firmware has now been corrected.

Present tense: … is now corrected.

Maybe give one example of the firmware file.

How did you test this? Maybe paste some log lines before and after?

> Cc: stable@...r.kernel.org
> Fixes: 30209aeff75f ("Bluetooth: qca: Expand firmware-name to load specific rampatch")
> Signed-off-by: Shuai Zhang <shuai.zhang@....qualcomm.com>
> ---
>   drivers/bluetooth/btqca.c | 22 ++++++++++++++++++++--
>   1 file changed, 20 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
> index 7c958d606..8e0004ef7 100644
> --- a/drivers/bluetooth/btqca.c
> +++ b/drivers/bluetooth/btqca.c
> @@ -847,8 +847,12 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   				 "qca/msbtfw%02x.mbn", rom_ver);
>   			break;
>   		case QCA_WCN6855:
> +			/* Due to historical reasons, WCN685x chip has been using firmware
> +			 * without the "wcn" prefix. The mapping between the chip and its
> +			 * corresponding firmware has now been corrected.
> +			 */
>   			snprintf(config.fwname, sizeof(config.fwname),
> -				 "qca/hpbtfw%02x.tlv", rom_ver);
> +				 "qca/wcnhpbtfw%02x.tlv", rom_ver);
>   			break;
>   		case QCA_WCN7850:
>   			snprintf(config.fwname, sizeof(config.fwname),
> @@ -861,6 +865,13 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   	}
>   
>   	err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
> +
> +	if (!rampatch_name && err < 0 && soc_type == QCA_WCN6855) {
> +		snprintf(config.fwname, sizeof(config.fwname),
> +			 "qca/hpbtfw%02x.tlv", rom_ver);
> +		err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
> +	}
> +
>   	if (err < 0) {
>   		bt_dev_err(hdev, "QCA Failed to download patch (%d)", err);
>   		return err;
> @@ -923,7 +934,7 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   		case QCA_WCN6855:
>   			qca_read_fw_board_id(hdev, &boardid);
>   			qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),
> -						  "hpnv", soc_type, ver, rom_ver, boardid);
> +						  "wcnhpnv", soc_type, ver, rom_ver, boardid);
>   			break;
>   		case QCA_WCN7850:
>   			qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),
> @@ -936,6 +947,13 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>   	}
>   
>   	err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
> +
> +	if (!firmware_name && err < 0 && soc_type == QCA_WCN6855) {
> +		qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),
> +					  "hpnv", soc_type, ver, rom_ver, boardid);
> +		err = qca_download_firmware(hdev, &config, soc_type, rom_ver);
> +	}
> +
>   	if (err < 0) {
>   		bt_dev_err(hdev, "QCA Failed to download NVM (%d)", err);
>   		return err;

The diff logs good.

Reviewed-by: Paul Menzel <pmenzel@...gen.mpg.de>


Kind regards,

Paul