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

[Chris Morgan]

I found the fix, simply put changing the compatible from
realtek,rtl8822cs-bt to realtek,rtl8732bs-bt fixes it (because it sets
the "H5_INFO_WAKEUP_DISABLE" flag). Is it too late for a V5, or should
I submit this as a fix to the devicetree and devicetree documentation?

Thank you.

On Fri, Mar 10, 2023 at 10:25 AM Chris Morgan <macroalpha82 at gmail.com> wrote:
>
> 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
> >