From: Jiande Lu jiande.lu@mediatek.com
[ Upstream commit 5bd5c716f7ec3e25d8d3b8a7566e192a26f9c7ce ]
Add VID 13d3 & PID 3630 for MediaTek MT7925 USB Bluetooth chip.
The information in /sys/kernel/debug/usb/devices about the Bluetooth device is listed as the below.
T: Bus=07 Lev=01 Prnt=01 Port=10 Cnt=02 Dev#= 2 Spd=480 MxCh= 0 D: Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=13d3 ProdID=3630 Rev= 1.00 S: Manufacturer=MediaTek Inc. S: Product=Wireless_Device S: SerialNumber=000000000 C:* #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr=100mA A: FirstIf#= 0 IfCount= 3 Cls=e0(wlcon) Sub=01 Prot=01 I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=125us E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms I: If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb E: Ad=83(I) Atr=01(Isoc) MxPS= 63 Ivl=1ms E: Ad=03(O) Atr=01(Isoc) MxPS= 63 Ivl=1ms I:* If#= 2 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none) E: Ad=8a(I) Atr=03(Int.) MxPS= 64 Ivl=125us E: Ad=0a(O) Atr=03(Int.) MxPS= 64 Ivl=125us I: If#= 2 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none) E: Ad=8a(I) Atr=03(Int.) MxPS= 512 Ivl=125us E: Ad=0a(O) Atr=03(Int.) MxPS= 512 Ivl=125us
Signed-off-by: Jiande Lu jiande.lu@mediatek.com Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Sasha Levin sashal@kernel.org ---
**YES** This commit should be backported to stable kernel trees based on the following analysis: ## Commit Analysis **Nature of the Change:** This commit adds hardware support for a new MediaTek MT7925 Bluetooth USB device with VID 13d3 and PID 3630. The change is a simple addition of a single line to the USB device ID table in `drivers/bluetooth/btusb.c`. **Code Changes:** The modification adds one entry to the `quirks_table`: ```c { USB_DEVICE(0x13d3, 0x3630), .driver_info = BTUSB_MEDIATEK | BTUSB_WIDEBAND_SPEECH }, ``` **Backport Suitability Assessment:** 1. **Fixes User-Affecting Issue:** YES - This enables Bluetooth functionality for users with this specific hardware variant, which would otherwise be non-functional. 2. **Small and Contained:** YES - The change is minimal (2 lines) and only adds a device ID entry without modifying any existing logic or behavior. 3. **No Side Effects:** YES - Adding a device ID entry has no impact on existing devices or functionality. It only extends support to new hardware. 4. **No Architectural Changes:** YES - This is purely a device identification addition with no changes to the driver's architecture or core functionality. 5. **Non-Critical Subsystem Impact:** YES - While Bluetooth is important, this change only affects one specific device variant and cannot break existing functionality. 6. **Minimal Regression Risk:** YES - Device ID additions have virtually no risk of causing regressions since they only affect the newly supported device. **Pattern Consistency:** This commit follows the exact same pattern as the provided reference commits (all marked "Backport Status: YES"): - Similar commit #1: Added VID 13d3/PID 3628 for MT7925 - Similar commit #2: Added VID 13d3/PID 3602 for MT7925 - Similar commit #3: Added VID 0489/PID e124 for MT7925 - Similar commit #4: Added VID 0489/PID e111 for MT7925 All these similar commits were deemed suitable for backporting, and this commit is functionally identical in scope and risk profile. **Stable Tree Compliance:** This change perfectly aligns with stable tree criteria: - Fixes important hardware compatibility issue - Introduces no new features beyond device recognition - Contains no architectural modifications - Has minimal regression risk - Is confined to a single driver file - Enables existing, well-tested code paths for new hardware The commit enables users with this specific MT7925 Bluetooth adapter to have functional Bluetooth support in stable kernels, which is an important user-facing improvement with essentially zero risk.
drivers/bluetooth/btusb.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index df3380a8de85e..c7c3cd0dcd49e 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -720,6 +720,8 @@ static const struct usb_device_id quirks_table[] = { BTUSB_WIDEBAND_SPEECH }, { USB_DEVICE(0x13d3, 0x3628), .driver_info = BTUSB_MEDIATEK | BTUSB_WIDEBAND_SPEECH }, + { USB_DEVICE(0x13d3, 0x3630), .driver_info = BTUSB_MEDIATEK | + BTUSB_WIDEBAND_SPEECH },
/* Additional Realtek 8723AE Bluetooth devices */ { USB_DEVICE(0x0930, 0x021d), .driver_info = BTUSB_REALTEK },