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Bluetooth: qca: Fix poor RF performance for WCN6855

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[ Upstream commit a2fad24894 ]

For WCN6855, board ID specific NVM needs to be downloaded once board ID
is available, but the default NVM is always downloaded currently.

The wrong NVM causes poor RF performance, and effects user experience
for several types of laptop with WCN6855 on the market.

Fix by downloading board ID specific NVM if board ID is available.

Fixes: 095327fede ("Bluetooth: hci_qca: Add support for QTI Bluetooth chip wcn6855")
Cc: stable@vger.kernel.org # 6.4
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Steev Klimaszewski <steev@kali.org> #Thinkpad X13s
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zijun Hu
2025-01-13 22:43:23 +08:00
committed by Greg Kroah-Hartman
parent ae2d111c09
commit ab8b6bf2bf
1 changed files with 3 additions and 2 deletions
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drivers/bluetooth/btqca.c
+3 -2
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@@ -927,8 +927,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
"qca/msnv%02x.bin", rom_ver);
break;
case QCA_WCN6855:
snprintf(config.fwname, sizeof(config.fwname),
"qca/hpnv%02x.bin", rom_ver);
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);
break;
case QCA_WCN7850:
qca_get_nvm_name_by_board(config.fwname, sizeof(config.fwname),