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

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Date: Mon, 25 Dec 2023 15:21:04 -0500
From: Felix Zhang <mrman@...an314.tech>
To: linux-bluetooth@...r.kernel.org
Cc: stable@...r.kernel.org, marcan@...can.st, bagasdotme@...il.com, 
	sven@...npeter.dev, 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: [PATCH v4] Bluetooth: Fix Bluetooth for BCM4377 on T2 Intel MacBooks

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>
---
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