linux-kernel - [PATCH v2 3/6] btbcm: disable read tx power for MacBook Pro 16,2 (13 inch

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Message-ID: <8FE730BD-C120-494E-8B3C-B16B48D280BE@live.com>
Date:   Mon, 29 Nov 2021 07:45:38 +0000
From:   Aditya Garg <gargaditya08@...e.com>
To:     Thorsten Leemhuis <regressions@...mhuis.info>
CC:     Marcel Holtmann <marcel@...tmann.org>,
        Orlando Chamberlain <redecorating@...tonmail.com>,
        Daniel Winkler <danielwinkler@...gle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Johan Hedberg <johan.hedberg@...el.com>,
        "linux-bluetooth@...r.kernel.org" <linux-bluetooth@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        "sonnysasaka@...omium.org" <sonnysasaka@...omium.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: [PATCH v2 3/6] btbcm: disable read tx power for MacBook Pro 16,2 (13
 inch - 4 Thunderbolt Ports, 2020)

From: Aditya Garg <gargaditya08@...e.com>

Bluetooth on Apple MacBook Pro 16,2 is unable to start due to LE Min/Max Tx Power being queried on 
startup. Add a DMI based quirk so that it is disabled.

v2: Wrap changelog in 72 columns

Signed-off-by: Aditya Garg <gargaditya08@...e.com>
---
 drivers/bluetooth/btbcm.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
index c1b0ca63880a6..ab7b754855d8a 100644
--- a/drivers/bluetooth/btbcm.c
+++ b/drivers/bluetooth/btbcm.c
@@ -354,6 +354,15 @@ static const struct dmi_system_id disable_broken_read_transmit_power[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,1"),
 		},
 	},
+	{
+		/* Match for Apple MacBook Pro 16,2 which needs
+		 * Read LE Min/Max Tx Power to be disabled.
+		 */
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,2"),
+		},
+	},
 	{ }
 };