linux-kernel - Re: [PATCH] Bluetooth: qca: Support downloading board id specific NVM for WCN6855

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Message-ID: <CAKXuJqg0SSLYW_XaY+vRGko33nR+Tt9BUcGaAvQt0QMAJjYzrw@mail.gmail.com>
Date: Fri, 15 Nov 2024 01:17:43 -0600
From: Steev Klimaszewski <steev@...i.org>
To: Zijun Hu <quic_zijuhu@...cinc.com>
Cc: Marcel Holtmann <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
	Zijun Hu <zijun_hu@...oud.com>, linux-bluetooth@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Bjorn Andersson <bjorande@...cinc.com>, 
	"Aiqun Yu (Maria)" <quic_aiquny@...cinc.com>, Cheng Jiang <quic_chejiang@...cinc.com>, 
	Johan Hovold <johan@...nel.org>, Jens Glathe <jens.glathe@...schoolsolutions.biz>
Subject: Re: [PATCH] Bluetooth: qca: Support downloading board id specific NVM
 for WCN6855

Hi Zijun,

On Thu, Nov 14, 2024 at 12:27 AM Zijun Hu <quic_zijuhu@...cinc.com> wrote:
>
> Download board id specific NVM instead of default for WCN6855 if board
> id is available, and that is required by Lenovo ThinkPad X13s.
>
> Cc: Bjorn Andersson <bjorande@...cinc.com>
> Cc: Aiqun Yu (Maria) <quic_aiquny@...cinc.com>
> Cc: Cheng Jiang <quic_chejiang@...cinc.com>
> Cc: Johan Hovold <johan@...nel.org>
> Cc: Jens Glathe <jens.glathe@...schoolsolutions.biz>
> Cc: Steev Klimaszewski <steev@...i.org>
> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
> ---
>  drivers/bluetooth/btqca.c | 35 ++++++++++++++++++++++++++++++++---
>  1 file changed, 32 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
> index dfbbac92242a..4f8576cbbab9 100644
> --- a/drivers/bluetooth/btqca.c
> +++ b/drivers/bluetooth/btqca.c
> @@ -717,6 +717,29 @@ static void qca_generate_hsp_nvm_name(char *fwname, size_t max_size,
>                 snprintf(fwname, max_size, "qca/hpnv%02x%s.%x", rom_ver, variant, bid);
>  }
>
> +static void qca_get_hsp_nvm_name_generic(struct qca_fw_config *cfg,
> +                                        struct qca_btsoc_version ver,
> +                                        u8 rom_ver, u16 bid)
> +{
> +       const char *variant;
> +
> +       /* hsp gf chip */
> +       if ((le32_to_cpu(ver.soc_id) & QCA_HSP_GF_SOC_MASK) == QCA_HSP_GF_SOC_ID)
> +               variant = "g";
> +       else
> +               variant = "";
> +
> +       if (bid == 0x0)
> +               snprintf(cfg->fwname, sizeof(cfg->fwname), "qca/hpnv%02x%s.bin",
> +                        rom_ver, variant);
> +       else if (bid & 0xff00)
> +               snprintf(cfg->fwname, sizeof(cfg->fwname), "qca/hpnv%02x%s.b%x",
> +                        rom_ver, variant, bid);
> +       else
> +               snprintf(cfg->fwname, sizeof(cfg->fwname), "qca/hpnv%02x%s.b%02x",
> +                        rom_ver, variant, bid);
> +}
> +
>  static inline void qca_get_nvm_name_generic(struct qca_fw_config *cfg,
>                                             const char *stem, u8 rom_ver, u16 bid)
>  {
> @@ -810,8 +833,15 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
>         /* Give the controller some time to get ready to receive the NVM */
>         msleep(10);
>
> -       if (soc_type == QCA_QCA2066 || soc_type == QCA_WCN7850)
> +       switch (soc_type) {
> +       case QCA_QCA2066:
> +       case QCA_WCN6855:
> +       case QCA_WCN7850:
>                 qca_read_fw_board_id(hdev, &boardid);
> +               break;
> +       default:
> +               break;
> +       }
>
>         /* Download NVM configuration */
>         config.type = TLV_TYPE_NVM;
> @@ -848,8 +878,7 @@ 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_get_hsp_nvm_name_generic(&config, ver, rom_ver, boardid);
>                         break;
>                 case QCA_WCN7850:
>                         qca_get_nvm_name_generic(&config, "hmt", rom_ver, boardid);
>
> ---
> base-commit: e88b020190bf5bc3e7ce5bd8003fc39b23cc95fe
> change-id: 20241113-x13s_wcn6855_fix-53c573ff7878
>
> Best regards,
> --
> Zijun Hu <quic_zijuhu@...cinc.com>
>

Thank you for this, I'd had something similar written, so it's nice to
see I was kind of on the right track!  I tested this on my Thinkpad
X13s with an H2GO bluetooth Speaker and the range I can get is far
greater when it properly loads the b8c file (with this patch), than
with the .bin (without this patch).  Thanks again!

Tested-by: Steev Klimaszewski <steev@...i.org>