linux-kernel - Re: [PATCH] Bluetooth: btrtl: btmrvl: Fix firmware filename for rtl chipset

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Message-Id: <6FCDA0C9-59CD-44F1-B31A-27DDB7FB8D25@holtmann.org>
Date:   Mon, 14 Mar 2022 16:21:23 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Meng Tang <tangmeng@...ontech.com>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        BlueZ <linux-bluetooth@...r.kernel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Bluetooth: btrtl: btmrvl: Fix firmware filename for rtl
 chipset

Hi Meng,

> Firmware for rtl chipset is as part of the linux-firmware repository
> in dir linux-firmware/rtl_bt. Today, the rtl8761a_config,
> rtl8821a_config, rtl8723b_config and rtl8723bs_config files are used
> in btrtl, but it doesn't actually exist, which causes errors like:
> 
> bluetooth: Direct firmware load for rtl_bt/rtl8821a_config.bin
>           failed with error -2
> 
> According to the files in the rtl_bt directory in the Linux firmware,
> fixes the driver to load correct firmware file for rtl.
> 
> Signed-off-by: Meng Tang <tangmeng@...ontech.com>
> ---
> drivers/bluetooth/btrtl.c | 13 +++++--------
> 1 file changed, 5 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
> index c2030f7e25b4..e3cfe0dff07d 100644
> --- a/drivers/bluetooth/btrtl.c
> +++ b/drivers/bluetooth/btrtl.c
> @@ -88,14 +88,14 @@ static const struct id_table ic_id_table[] = {
> 	  .config_needed = true,
> 	  .has_rom_version = true,
> 	  .fw_name  = "rtl_bt/rtl8723bs_fw.bin",
> -	  .cfg_name = "rtl_bt/rtl8723bs_config" },
> +	  .cfg_name = "rtl_bt/rtl8723bs_config-OBDA8723" },

this change is not explained.

> 
> 	/* 8723B */
> 	{ IC_INFO(RTL_ROM_LMP_8723B, 0xb, 0x6, HCI_USB),
> 	  .config_needed = false,
> 	  .has_rom_version = true,
> 	  .fw_name  = "rtl_bt/rtl8723b_fw.bin",
> -	  .cfg_name = "rtl_bt/rtl8723b_config" },
> +	  .cfg_name = NULL },

.config_needed is set to false. Then we better use a request_firmware version where the existence of the file is optional.

And even if we wanted to remove it (which would make the .config_needed obsolute), we are not doing a NULL assignment, we just remove the line.

> 
> 	/* 8723D */
> 	{ IC_INFO(RTL_ROM_LMP_8723B, 0xd, 0x8, HCI_USB),
> @@ -116,7 +116,7 @@ static const struct id_table ic_id_table[] = {
> 	  .config_needed = false,
> 	  .has_rom_version = true,
> 	  .fw_name  = "rtl_bt/rtl8821a_fw.bin",
> -	  .cfg_name = "rtl_bt/rtl8821a_config" },
> +	  .cfg_name = NULL },
> 
> 	/* 8821C */
> 	{ IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_USB),
> @@ -131,7 +131,7 @@ static const struct id_table ic_id_table[] = {
> 	  .config_needed = false,
> 	  .has_rom_version = true,
> 	  .fw_name  = "rtl_bt/rtl8761a_fw.bin",
> -	  .cfg_name = "rtl_bt/rtl8761a_config" },
> +	  .cfg_name = NULL },
> 
> 	/* 8761B */
> 	{ IC_INFO(RTL_ROM_LMP_8761A, 0xb, 0xa, HCI_UART),
> @@ -921,15 +921,12 @@ MODULE_VERSION(VERSION);
> MODULE_LICENSE("GPL");
> MODULE_FIRMWARE("rtl_bt/rtl8723a_fw.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8723b_fw.bin");
> -MODULE_FIRMWARE("rtl_bt/rtl8723b_config.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8723bs_fw.bin");
> -MODULE_FIRMWARE("rtl_bt/rtl8723bs_config.bin");
> +MODULE_FIRMWARE("rtl_bt/rtl8723bs_config-OBDA8723.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8723ds_fw.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8723ds_config.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8761a_fw.bin");
> -MODULE_FIRMWARE("rtl_bt/rtl8761a_config.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8821a_fw.bin");
> -MODULE_FIRMWARE("rtl_bt/rtl8821a_config.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8822b_fw.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8822b_config.bin");
> MODULE_FIRMWARE("rtl_bt/rtl8852au_fw.bin");

Regards

Marcel