linux-kernel - Re: [PATCH v7 0/2] Bluetooth: hci_h5: btrtl: Add support for RTL8822CS hci

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Date:   Wed, 26 Jan 2022 17:14:14 +0300
From:   Vyacheslav <adeep@...ina.in>
To:     Marcel Holtmann <marcel@...tmann.org>,
        LKML <linux-kernel@...r.kernel.org>,
        BlueZ <linux-bluetooth@...r.kernel.org>
Subject: Re: [PATCH v7 0/2] Bluetooth: hci_h5: btrtl: Add support for
 RTL8822CS hci_ver 0x08


26.01.2022 16:40, Marcel Holtmann wrote:
> Hi Vyacheslav,
> 
>> Add a variation of RTL8822CS with hci_ver = 0x08. This is fully similar
>> to RTL8822CS with hci_ver = 0x0a observed on the Tanix TX6 Android set-top
>> box and JetHome JetHub H1.
>>
>> While testing the RTL8822CS SDIO WiFi/BT adapter, I found that in some
>> cases the kernel could not initialize it. However, manually resetting the
>> adapter via gpio allows it to start correctly.
>> Apparently at system start the adapter is in an undefined state (including
>> the unknown state of gpio after starting uboot). A forced reset helps to
>> initialize the adapter in most cases. Experimentally it was found that
>> 100ms is enough to reset.
>> So, add power reset via enable-gpios in h5_btrtl_open function.
>>
>> Changes from v6..v4:
>> - fix patch description
>> Changes from v3:
>> - add has_msft_ext option
>> Changes from v2:
>> - align the patches for bluetooth-next
>> Changes from v1:
>> - remove Signed-off-by chbgdn <chbgdn@...il.com> as not reachable
>>
>> Vyacheslav Bocharov (2):
>>   Bluetooth: btrtl: Add support for RTL8822C hci_ver 0x08
>>   Bluetooth: hci_h5: Add power reset via gpio in h5_btrtl_open
>>
>> drivers/bluetooth/btrtl.c  | 8 ++++++++
>> drivers/bluetooth/hci_h5.c | 5 +++++
>> 2 files changed, 13 insertions(+)
> 
> both patches have been applied to bluetooth-next tree.

Thanks!

> 
> Regards
> 
> Marcel
>