[PATCH 2/3 V4] Bluetooth: hci_h5: btrtl: Add support for RTL8821CS

[Chris Morgan]

I shudder to bring this up now, but I'm encountering a new bug and
might have to withdraw this.

I'm receiving errors in dmesg of the following, and I can't seem to
figure out the root cause:
Bluetooth: hci0: Out-of-order packet arrived

Any thoughts on what might cause it?
Thank you.

On Tue, Feb 28, 2023 at 9:22 AM Chris Morgan <macroalpha82 at gmail.com> wrote:
>
> From: Chris Morgan <macromorgan at hotmail.com>
>
> RTL8821CS is a WiFi + Bluetooth combo chip from Realtek that provides
> WiFi A/B/G/N/AC over an SDIO interface and Bluetooth 4.2 over a UART
> interface.
>
> Note that the firmware this was tested with was firmware version
> 0x75b8f098.
>
> Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
> ---
>  drivers/bluetooth/btrtl.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
> index 69c3fe649ca7..72947d319fa6 100644
> --- a/drivers/bluetooth/btrtl.c
> +++ b/drivers/bluetooth/btrtl.c
> @@ -128,6 +128,14 @@ static const struct id_table ic_id_table[] = {
>           .fw_name  = "rtl_bt/rtl8821c_fw.bin",
>           .cfg_name = "rtl_bt/rtl8821c_config" },
>
> +       /* 8821CS */
> +       { IC_INFO(RTL_ROM_LMP_8821A, 0xc, 0x8, HCI_UART),
> +         .config_needed = true,
> +         .has_rom_version = true,
> +         .has_msft_ext = true,
> +         .fw_name  = "rtl_bt/rtl8821cs_fw.bin",
> +         .cfg_name = "rtl_bt/rtl8821cs_config" },
> +
>         /* 8761A */
>         { IC_INFO(RTL_ROM_LMP_8761A, 0xa, 0x6, HCI_USB),
>           .config_needed = false,
> --
> 2.34.1
>