linux-kernel - Re: [PATCH] Bluetooth: btrtl: Enable WBS for the specific Realtek devices

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Date:   Mon, 18 Jan 2021 20:41:00 -0800
From:   Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
To:     max.chou@...ltek.com
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Bluez mailing list <linux-bluetooth@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Alex Lu <alex_lu@...lsil.com.cn>, hildawu@...ltek.com,
        kidman@...ltek.com, Shyh-In Hwang <josephsih@...omium.org>
Subject: Re: [PATCH] Bluetooth: btrtl: Enable WBS for the specific Realtek devices

Hi Max,

On Mon, Jan 18, 2021 at 3:28 AM <max.chou@...ltek.com> wrote:
>
> From: Max Chou <max.chou@...ltek.com>
>
> By this change, it will enable WBS supported on the specific Realtek BT
> devices, such as RTL8822C and RTL8852A.
> In the future, it's able to maintain what the Realtek devices support WBS
> here.
>
> Tested-by: Hilda Wu <hildawu@...ltek.com>
> Signed-off-by: Max Chou <max.chou@...ltek.com>
> ---
>  drivers/bluetooth/btrtl.c | 26 +++++++++++++++++++++++---
>  1 file changed, 23 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
> index 24f03a1f8d57..835819c47ae6 100644
> --- a/drivers/bluetooth/btrtl.c
> +++ b/drivers/bluetooth/btrtl.c
> @@ -38,6 +38,19 @@
>         .hci_ver = (hciv), \
>         .hci_bus = (bus)
>
> +enum  btrtl_chip_id {
> +       CHIP_ID_8723A,          /* index  0 for RTL8723A*/
> +       CHIP_ID_8723B,          /* index  1 for RTL8723B*/
> +       CHIP_ID_8821A,          /* index  2 for RTL8821A*/
> +       CHIP_ID_8761A,          /* index  3 for RTL8761A*/
> +       CHIP_ID_8822B = 8,      /* index  8 for RTL8822B */
> +       CHIP_ID_8723D,          /* index  9 for RTL8723D */
> +       CHIP_ID_8821C,          /* index 10 for RTL8821C */
> +       CHIP_ID_8822C = 13,     /* index 13 for RTL8822C */
> +       CHIP_ID_8761B,          /* index 14 for RTL8761B */
> +       CHIP_ID_8852A = 18,     /* index 18 for RTL8852A */
> +};
> +
>  struct id_table {
>         __u16 match_flags;
>         __u16 lmp_subver;
> @@ -58,6 +71,7 @@ struct btrtl_device_info {
>         u8 *cfg_data;
>         int cfg_len;
>         bool drop_fw;
> +       int project_id;
>  };
>
>  static const struct id_table ic_id_table[] = {
> @@ -307,8 +321,10 @@ static int rtlbt_parse_firmware(struct hci_dev *hdev,
>
>         /* Find project_id in table */
>         for (i = 0; i < ARRAY_SIZE(project_id_to_lmp_subver); i++) {
> -               if (project_id == project_id_to_lmp_subver[i].id)
> +               if (project_id == project_id_to_lmp_subver[i].id) {
> +                       btrtl_dev->project_id = project_id;
>                         break;
> +               }
>         }
>
>         if (i >= ARRAY_SIZE(project_id_to_lmp_subver)) {
> @@ -725,12 +741,16 @@ int btrtl_setup_realtek(struct hci_dev *hdev)
>         /* Enable central-peripheral role (able to create new connections with
>          * an existing connection in slave role).
>          */
> -       switch (btrtl_dev->ic_info->lmp_subver) {
> -       case RTL_ROM_LMP_8822B:
> +       /* Enable WBS supported for the specific Realtek devices. */
> +       switch (btrtl_dev->project_id) {
> +       case CHIP_ID_8822C:
> +       case CHIP_ID_8852A:
>                 set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
> +               set_bit(HCI_QUIRK_WIDEBAND_SPEECH_SUPPORTED, &hdev->quirks);
>                 break;
>         default:
>                 rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
> +               rtl_dev_dbg(hdev, "WBS supported not enabled.");
>                 break;
>         }

There is a null-check on btrtl_dev->ic_info right above this switch
statement (https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=b649813eadbc062d8682f7a20aa025275707dd1f).
Is this still necessary with this change? (Sorry, I missed this during
our previous review).

>
> --
> 2.17.1
>

Abhishek