linux-kernel - Re: [PATCH v4] Bluetooth: Fix Bluetooth for BCM4377 on T2 Intel MacBooks

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Date: Wed, 27 Dec 2023 11:11:41 +0100
From: Sven Peter <sven@...npeter.dev>
To: Felix Zhang <mrman@...an314.tech>
Cc: linux-bluetooth@...r.kernel.org, stable@...r.kernel.org,
 marcan@...can.st, bagasdotme@...il.com, alyssa@...enzweig.io,
 marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
 orlandoch.dev@...il.com, kekrby@...il.com, admin@...eit.net, j@...nau.net,
 gargaditya08@...e.com, asahi@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] Bluetooth: Fix Bluetooth for BCM4377 on T2 Intel MacBooks

Hi,


> On 25. Dec 2023, at 21:21, Felix Zhang <mrman@...an314.tech> wrote:
> Starting v6.5, Bluetooth does not work at all on my T2
> MacBookAir9,1 with the BCM4377 chip.  When I boot up the computer,
> go into bluetoothctl, and then try to run commands like scan on,
> show, list, it returns "No default controller available."  I have
> tried reloading the kernel module, in which the log outputs
> "{Added,Removed} hci0 (unconfigured)."  With this patch, I
> am able to use Bluetooth as normal without any errors regarding
> hci0 being unconfigured.  However, an issue is still present
> where sometimes hci_bcm4377 will have to be reloaded in order to
> get bluetooth to work.  I believe this was still present before
> the previously mentioned commit.
> I would also like to thank Kerem Karabay <kekrby@...il.com> for
> assisting me with this patch.
> 
> Fixes: 6945795bc81a ("Bluetooth: fix use-bdaddr-property quirk")
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Felix Zhang <mrman@...an314.tech>
> ---

Thanks a lot for debugging and fixing this! The diff looks good to me.

Reviewed-by: Sven Peter <sven@...npeter.dev>


Best,

Sven

> v4:
> * Adjust the format to pass the CI (again).
> * Shorten description
> ---
>  drivers/bluetooth/hci_bcm4377.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bluetooth/hci_bcm4377.c
> b/drivers/bluetooth/hci_bcm4377.c
> index a61757835695..5c6fef1aa0f6 100644
> --- a/drivers/bluetooth/hci_bcm4377.c
> +++ b/drivers/bluetooth/hci_bcm4377.c
> @@ -513,6 +513,7 @@ struct bcm4377_hw {
>      unsigned long broken_ext_scan : 1;
>      unsigned long broken_mws_transport_config : 1;
>      unsigned long broken_le_coded : 1;
> +    unsigned long use_bdaddr_property : 1;
>  
>      int (*send_calibration)(struct bcm4377_data *bcm4377);
>      int (*send_ptb)(struct bcm4377_data *bcm4377,
> @@ -2368,5 +2369,6 @@ static int bcm4377_probe(struct pci_dev *pdev,
> const struct pci_device_id *id)
>      hdev->set_bdaddr = bcm4377_hci_set_bdaddr;
>      hdev->setup = bcm4377_hci_setup;
>  
> -    set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
> +    if (bcm4377->hw->use_bdaddr_property)
> +        set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
>      if (bcm4377->hw->broken_mws_transport_config)
> @@ -2465,6 +2467,7 @@ static const struct bcm4377_hw
> bcm4377_hw_variants[] = {
>          .has_bar0_core2_window2 = true,
>          .broken_mws_transport_config = true,
>          .broken_le_coded = true,
> +        .use_bdaddr_property = true,
>          .send_calibration = bcm4378_send_calibration,
>          .send_ptb = bcm4378_send_ptb,
>      },
> @@ -2479,6 +2482,7 @@ static const struct bcm4377_hw
> bcm4377_hw_variants[] = {
>          .clear_pciecfg_subsystem_ctrl_bit19 = true,
>          .broken_mws_transport_config = true,
>          .broken_le_coded = true,
> +        .use_bdaddr_property = true,
>          .send_calibration = bcm4387_send_calibration,
>          .send_ptb = bcm4378_send_ptb,
>      },
> -- 
> 2.43.0