[PATCH v3 0/1] Bluetooth: btqca: Add WCN6855 firmware priority selection feature

[PATCH v3 0/1] Bluetooth: btqca: Add WCN6855 firmware priority selection feature

[Shuai Zhang]

Update WCN6855 firmware to use the new FW file and added a fallback mechanism.

changed v2:
- Remove CC satble
- Update commit
- add test steps and log
- Link to v2
  https://lore.kernel.org/all/20251114081751.3940541-2-shuai.zhang@oss.qualcomm.com/

Changes v2:
- Add Fixes tag.
- Add comments in the commit and code to explain the reason for the changes.
- Link to v1
  https://lore.kernel.org/all/20251112074638.1592864-1-quic_shuaz@quicinc.com/

Shuai Zhang (1):
  Bluetooth: btqca: Add WCN6855 firmware priority selection feature

 drivers/bluetooth/btqca.c | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

-- 
2.34.1

[PATCH v3 1/1] Bluetooth: btqca: Add WCN6855 firmware priority selection feature

[Shuai Zhang]

Historically, WCN685x and QCA2066 shared the same firmware files.
Now, changes are planned for the firmware that will make it incompatible
with QCA2066, so a new firmware name is required for WCN685x.

Test Steps:
 - Boot device
 - Check the BTFW loading status via dmesg

Sanity pass and Test Log:
QCA Downloading qca/wcnhpbftfw21.tlv
Direct firmware load for qca/wcnhpbftfw21.tlv failed with error -2
QCA Downloading qca/hpbftfw21.tlv

Signed-off-by: Shuai Zhang <shuai.zhang@oss.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;
-- 
2.34.1

Re: [PATCH v3 1/1] Bluetooth: btqca: Add WCN6855 firmware priority selection feature

[kernel test robot]

Hi,

Thanks for your patch.

FYI: kernel test robot notices the stable kernel rule is not satisfied.

The check is based on https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html#option-1

Rule: add the tag "Cc: stable@vger.kernel.org" in the sign-off area to have the patch automatically included in the stable tree.
Subject: [PATCH v3 1/1] Bluetooth: btqca: Add WCN6855 firmware priority selection feature
Link: https://lore.kernel.org/stable/20251117021429.711611-2-shuai.zhang%40oss.qualcomm.com

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki