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Date: Tue, 14 May 2024 00:14:11 +0700
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From: =?UTF-8?B?0JTQsNC90LjQuw==?= <danstiv404@gmail.com>
Subject: abandoned patches for ATS2851
Cc: raul.cheleguini@gmail.com
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Hello!
I encountered a problem with a USB bluetooth adapter which probably uses 
an ATS2851.
I'm not 100% sure about this, but the symptoms match the problem 
described in the patch.

Here are the patches I found.
1. It seems to have been applied.
https://lore.kernel.org/linux-bluetooth/168150781825.20001.4973139468540739153.git-patchwork-notify@kernel.org/T/#t

2. It seems it was not applied.
https://lore.kernel.org/linux-bluetooth/20230323135804.3962783-1-raul.cheleguini@gmail.com/T/#t

3. It seems it was not applied.
https://patchwork.kernel.org/project/bluetooth/patch/20230426184017.2051211-1-raul.cheleguini@gmail.com/#25314789

Patches 2 and 3 were not applied, as I understand, due to some minor 
problems with code formatting, is it possible to complete the process of 
applying them?

Here is some information about the device:

dmesg
[    0.000000] Linux version 6.6.13+bpo-rt-amd64 
(debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-14) 12.2.0, GNU 
ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT_RT Debian 
6.6.13-1~bpo12+1 (2024-02-15)
[    0.000000] Command line: 
BOOT_IMAGE=/boot/vmlinuz-6.6.13+bpo-rt-amd64 
root=UUID=b9338182-ab4b-48cb-b492-60e7ed340018 ro 
systemd.unified_cgroup_hierarchy=false quiet reboot=pci
...
[  110.420763] usb 1-2: new full-speed USB device number 2 using uhci_hcd
[  110.609798] usb 1-2: New USB device found, idVendor=10d7, 
idProduct=b012, bcdDevice=88.91
[  110.609814] usb 1-2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[  110.609820] usb 1-2: Product: general adapter
[  110.609824] usb 1-2: Manufacturer: Actions
[  110.609829] usb 1-2: SerialNumber: ACTIONS1234
[  110.614223] Bluetooth: hci1: HCI Read Default Erroneous Data 
Reporting command is advertised, but not supported.
[  110.614245] Bluetooth: hci1: HCI Read Transmit Power Level command is 
advertised, but not supported.
[  110.614252] Bluetooth: hci1: HCI LE Set Random Private Address 
Timeout command is advertised, but not supported.
[  110.666673] Bluetooth: MGMT ver 1.22

lsusb -v
...
Bus 001 Device 002: ID 10d7:b012 Actions general adapter
Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass          224 Wireless
   bDeviceSubClass         1 Radio Frequency
   bDeviceProtocol         1 Bluetooth
   bMaxPacketSize0        64
   idVendor           0x10d7
   idProduct          0xb012
   bcdDevice           88.91
   iManufacturer           1 Actions
   iProduct                2 general adapter
   iSerial                 3 ACTIONS1234
   bNumConfigurations      1
...

btmon
...
< HCI Command: LE Extended Create Connection (0x08|0x0043) plen 58 #48 
[hci0] 2.000505
         Filter policy: Accept list is not used (0x00)
         Own address type: Public (0x00)
         Peer address type: Random (0x01)
         Peer address: E8:42:26:5C:0F:07 (Static)
         Initiating PHYs: 0x07
         Entry 0: LE 1M
           Scan interval: 60.000 msec (0x0060)
           Scan window: 60.000 msec (0x0060)
           Min connection interval: 30.00 msec (0x0018)
           Max connection interval: 50.00 msec (0x0028)
           Connection latency: 0 (0x0000)
           Supervision timeout: 420 msec (0x002a)
           Min connection length: 0.000 msec (0x0000)
           Max connection length: 0.000 msec (0x0000)
         Entry 1: LE 2M
           Scan interval: 60.000 msec (0x0060)
           Scan window: 60.000 msec (0x0060)
           Min connection interval: 30.00 msec (0x0018)
           Max connection interval: 50.00 msec (0x0028)
           Connection latency: 0 (0x0000)
           Supervision timeout: 420 msec (0x002a)
           Min connection length: 0.000 msec (0x0000)
           Max connection length: 0.000 msec (0x0000)
         Entry 2: LE Coded
           Scan interval: 60.000 msec (0x0060)
           Scan window: 60.000 msec (0x0060)
           Min connection interval: 30.00 msec (0x0018)
           Max connection interval: 50.00 msec (0x0028)
           Connection latency: 0 (0x0000)
           Supervision timeout: 420 msec (0x002a)
           Min connection length: 0.000 msec (0x0000)
           Max connection length: 0.000 msec (0x0000)
 > HCI Event: Command Status (0x0f) plen 4 #49 [hci0] 2.001242
       LE Extended Create Connection (0x08|0x0043) ncmd 1
         Status: Unknown HCI Command (0x01)
...
The adapter supports le, I was able to connect to a le device from 
windows 11.