[PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[Zhang Heng]

Multiple USB devices have the same ID;
add device descriptors to distinguish them.

Fixes: 1a8953f4f774 ("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY")
Tested-by: staffan.melin@oscillator.se
Signed-off-by: Zhang Heng <zhangheng@kylinos.cn>
---
 drivers/hid/hid-quirks.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index ffd034566e2e..d28b180abd72 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -913,7 +913,6 @@ static const struct hid_device_id hid_ignore_list[] = {
 #endif
 	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_HP_5MP_CAMERA_5473) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_SMARTLINKTECHNOLOGY, USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155) },
 	{ }
 };
 
@@ -1062,6 +1061,17 @@ bool hid_ignore(struct hid_device *hdev)
 					     strlen(elan_acpi_id[i].id)))
 					return true;
 		break;
+	case USB_VENDOR_ID_SMARTLINKTECHNOLOGY:
+		/* Multiple USB devices with identical IDs (mic & touchscreen).
+		 * The touch screen requires hid core processing, but the
+		 * microphone does not. They can be distinguished by manufacturer
+		 * and serial number.
+		 */
+		if (hdev->product == USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155 &&
+		    strncmp(hdev->name, "SmartlinkTechnology", 19) == 0 &&
+		    strncmp(hdev->uniq, "20201111000001", 14) == 0)
+			return true;
+		break;
 	}
 
 	if (hdev->type == HID_TYPE_USBMOUSE &&
-- 
2.47.1

Re: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[Linux Hid]

Hi Zhang,

The subject doesn't reflect what the patch is doing. You are not adding 
a device descriptor, you are fixing a regression.

On 9/22/2025 7:24 PM, Zhang Heng wrote:
> Multiple USB devices have the same ID;
> add device descriptors to distinguish them.
> 
> Fixes: 1a8953f4f774 ("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY")

Should have a Fixes: tag referencing the regression bug.
Also a CC: tag for 1114557@bugs.debian.org
Possibly a CC: tag for stable@vger.kernel.org as well?

> Tested-by: staffan.melin@oscillator.se
> Signed-off-by: Zhang Heng <zhangheng@kylinos.cn>
> ---
>   drivers/hid/hid-quirks.c | 12 +++++++++++-
>   1 file changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
> index ffd034566e2e..d28b180abd72 100644
> --- a/drivers/hid/hid-quirks.c
> +++ b/drivers/hid/hid-quirks.c
> @@ -913,7 +913,6 @@ static const struct hid_device_id hid_ignore_list[] = {
>   #endif
>   	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
>   	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_HP_5MP_CAMERA_5473) },
> -	{ HID_USB_DEVICE(USB_VENDOR_ID_SMARTLINKTECHNOLOGY, USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155) },
>   	{ }
>   };

Smartlink Technology does not own the 0x4c4a VID or the 0x4155 PID. They 
are an artifact of the Jieli SDK they used in development so the 
#defines should not imply ownership by Smartlink. VID 0x4c4a is 
currently unassigned by the USBIF and is therefore 'reserved'.

Maybe change
USB_VENDOR_ID_SMARTLINKTECHNOLOGY to USB_VENDOR_ID_JIELI_SDK_DEFAULT
and
USB_DEVICE_ID_SMARTLINKTRCHNOLOGY_4155 to USB_DEVICE_ID_JIELI_SDK_4155?

>   
> @@ -1062,6 +1061,17 @@ bool hid_ignore(struct hid_device *hdev)
>   					     strlen(elan_acpi_id[i].id)))
>   					return true;
>   		break;
> +	case USB_VENDOR_ID_SMARTLINKTECHNOLOGY:
> +		/* Multiple USB devices with identical IDs (mic & touchscreen).
> +		 * The touch screen requires hid core processing, but the
> +		 * microphone does not. They can be distinguished by manufacturer
> +		 * and serial number.
> +		 */
> +		if (hdev->product == USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155 &&
> +		    strncmp(hdev->name, "SmartlinkTechnology", 19) == 0 &&
> +		    strncmp(hdev->uniq, "20201111000001", 14) == 0)

Using the serial number as a device identifier is somewhat risky. The 
serial number is optional for a USB device but if it is used then it's 
supposed to be unique for each device. Given how horrible the 
configuration and HID descriptors are for this device it's unlikely that 
they went to the trouble to give each unit a unique serial number. But 
you should check a few of the devices (if you have more than one) to 
verify they all have the same 20201111000001 serial number.

It's too bad the bcdHID version test for 0x0201 didn't work. The 
hid->version field is filled by usbhid_probe with bcdDevice before both 
hid_lookup_quirk and hid_ignore are called and then updated with bcdHID 
by usbhid_parse after they have been called.

> +			return true;
> +		break;
>   	}
>   
>   	if (hdev->type == HID_TYPE_USBMOUSE &&

Thanks
Terry

Re: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[zhangheng]

It happened to be the holiday, so communication was a bit troublesome.

However, after a brief discussion with the microphone manufacturer,

it was found that the serial number was still 20201111000001 on another

microphone device. So, should we add it?

在 2025/9/29 8:42, Linux Hid 写道:
> Hi Zhang,
>
> The subject doesn't reflect what the patch is doing. You are not adding
> a device descriptor, you are fixing a regression.
>
> On 9/22/2025 7:24 PM, Zhang Heng wrote:
>> Multiple USB devices have the same ID;
>> add device descriptors to distinguish them.
>>
>> Fixes: 1a8953f4f774 ("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY")
> Should have a Fixes: tag referencing the regression bug.
> Also a CC: tag for 1114557@bugs.debian.org
> Possibly a CC: tag for stable@vger.kernel.org as well?
>
>> Tested-by: staffan.melin@oscillator.se
>> Signed-off-by: Zhang Heng <zhangheng@kylinos.cn>
>> ---
>>    drivers/hid/hid-quirks.c | 12 +++++++++++-
>>    1 file changed, 11 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
>> index ffd034566e2e..d28b180abd72 100644
>> --- a/drivers/hid/hid-quirks.c
>> +++ b/drivers/hid/hid-quirks.c
>> @@ -913,7 +913,6 @@ static const struct hid_device_id hid_ignore_list[] = {
>>    #endif
>>    	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
>>    	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_HP_5MP_CAMERA_5473) },
>> -	{ HID_USB_DEVICE(USB_VENDOR_ID_SMARTLINKTECHNOLOGY, USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155) },
>>    	{ }
>>    };
> Smartlink Technology does not own the 0x4c4a VID or the 0x4155 PID. They
> are an artifact of the Jieli SDK they used in development so the
> #defines should not imply ownership by Smartlink. VID 0x4c4a is
> currently unassigned by the USBIF and is therefore 'reserved'.
>
> Maybe change
> USB_VENDOR_ID_SMARTLINKTECHNOLOGY to USB_VENDOR_ID_JIELI_SDK_DEFAULT
> and
> USB_DEVICE_ID_SMARTLINKTRCHNOLOGY_4155 to USB_DEVICE_ID_JIELI_SDK_4155?
>
>>    
>> @@ -1062,6 +1061,17 @@ bool hid_ignore(struct hid_device *hdev)
>>    					     strlen(elan_acpi_id[i].id)))
>>    					return true;
>>    		break;
>> +	case USB_VENDOR_ID_SMARTLINKTECHNOLOGY:
>> +		/* Multiple USB devices with identical IDs (mic & touchscreen).
>> +		 * The touch screen requires hid core processing, but the
>> +		 * microphone does not. They can be distinguished by manufacturer
>> +		 * and serial number.
>> +		 */
>> +		if (hdev->product == USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155 &&
>> +		    strncmp(hdev->name, "SmartlinkTechnology", 19) == 0 &&
>> +		    strncmp(hdev->uniq, "20201111000001", 14) == 0)
> Using the serial number as a device identifier is somewhat risky. The
> serial number is optional for a USB device but if it is used then it's
> supposed to be unique for each device. Given how horrible the
> configuration and HID descriptors are for this device it's unlikely that
> they went to the trouble to give each unit a unique serial number. But
> you should check a few of the devices (if you have more than one) to
> verify they all have the same 20201111000001 serial number.
>
> It's too bad the bcdHID version test for 0x0201 didn't work. The
> hid->version field is filled by usbhid_probe with bcdDevice before both
> hid_lookup_quirk and hid_ignore are called and then updated with bcdHID
> by usbhid_parse after they have been called.
>
>> +			return true;
>> +		break;
>>    	}
>>    
>>    	if (hdev->type == HID_TYPE_USBMOUSE &&
> Thanks
> Terry

Re: Bug#1114557: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[Salvatore Bonaccorso]

Hi,

On Mon, Oct 13, 2025 at 04:32:39PM +0800, zhangheng wrote:
> It happened to be the holiday, so communication was a bit troublesome.
> 
> However, after a brief discussion with the microphone manufacturer,
> 
> it was found that the serial number was still 20201111000001 on another
> 
> microphone device. So, should we add it?

As this issue still affects one of our users in Debian, is there
anything which can be done to unblock the situation? Does that mean
that the proposed patch is not good for the microphone device?

My understanding is that it fixes at least Staffan's case which
regressed from 1a8953f4f774 ("HID: Add IGNORE quirk for
SMARTLINKTECHNOLOGY").

Regards,
Salvatore

Re: Bug#1114557: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[Staffan Melin]

Thank you Salvatore, for moving this forward.

I can add that the issue has been reported by several users on a GPD DUO 
channel on Discord -- all are on newer kernels but have different Linux 
distributions.

I can also confirm that the patch does solve my problem. Looking forward 
to some resolution of this, as it stops me from upgrading to Testing. :)

Best regards,

Staffan


On 2025-10-22 08:04, Salvatore Bonaccorso wrote:
> Hi,
> 
> On Mon, Oct 13, 2025 at 04:32:39PM +0800, zhangheng wrote:
>> It happened to be the holiday, so communication was a bit troublesome.
>> 
>> However, after a brief discussion with the microphone manufacturer,
>> 
>> it was found that the serial number was still 20201111000001 on 
>> another
>> 
>> microphone device. So, should we add it?
> 
> As this issue still affects one of our users in Debian, is there
> anything which can be done to unblock the situation? Does that mean
> that the proposed patch is not good for the microphone device?
> 
> My understanding is that it fixes at least Staffan's case which
> regressed from 1a8953f4f774 ("HID: Add IGNORE quirk for
> SMARTLINKTECHNOLOGY").
> 
> Regards,
> Salvatore

Re: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[Terry Junge]

Hi Zhang,

Sorry my earlier emails had my name mangled by Thunderbird. I am not 
Linux Hid. I am Terry Junge.

Anyway, are you planning on sending a V3 of this patch?

Also, would it be possible for you to get the report descriptor from the 
microphone.

Thanks,
Terry

On 10/13/2025 1:32 AM, zhangheng wrote:
> It happened to be the holiday, so communication was a bit troublesome.
> 
> However, after a brief discussion with the microphone manufacturer,
> 
> it was found that the serial number was still 20201111000001 on another
> 
> microphone device. So, should we add it?
> 
> 在 2025/9/29 8:42, Linux Hid 写道:
>> Hi Zhang,
>>
>> The subject doesn't reflect what the patch is doing. You are not adding
>> a device descriptor, you are fixing a regression.
>>
>> On 9/22/2025 7:24 PM, Zhang Heng wrote:
>>> Multiple USB devices have the same ID;
>>> add device descriptors to distinguish them.
>>>
>>> Fixes: 1a8953f4f774 ("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY")
>> Should have a Fixes: tag referencing the regression bug.
>> Also a CC: tag for 1114557@bugs.debian.org
>> Possibly a CC: tag for stable@vger.kernel.org as well?
>>
>>> Tested-by: staffan.melin@oscillator.se
>>> Signed-off-by: Zhang Heng <zhangheng@kylinos.cn>
>>> ---
>>>    drivers/hid/hid-quirks.c | 12 +++++++++++-
>>>    1 file changed, 11 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
>>> index ffd034566e2e..d28b180abd72 100644
>>> --- a/drivers/hid/hid-quirks.c
>>> +++ b/drivers/hid/hid-quirks.c
>>> @@ -913,7 +913,6 @@ static const struct hid_device_id 
>>> hid_ignore_list[] = {
>>>    #endif
>>>        { HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, 
>>> USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
>>>        { HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, 
>>> USB_DEVICE_ID_QUANTA_HP_5MP_CAMERA_5473) },
>>> -    { HID_USB_DEVICE(USB_VENDOR_ID_SMARTLINKTECHNOLOGY, 
>>> USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155) },
>>>        { }
>>>    };
>> Smartlink Technology does not own the 0x4c4a VID or the 0x4155 PID. They
>> are an artifact of the Jieli SDK they used in development so the
>> #defines should not imply ownership by Smartlink. VID 0x4c4a is
>> currently unassigned by the USBIF and is therefore 'reserved'.
>>
>> Maybe change
>> USB_VENDOR_ID_SMARTLINKTECHNOLOGY to USB_VENDOR_ID_JIELI_SDK_DEFAULT
>> and
>> USB_DEVICE_ID_SMARTLINKTRCHNOLOGY_4155 to USB_DEVICE_ID_JIELI_SDK_4155?
>>
>>> @@ -1062,6 +1061,17 @@ bool hid_ignore(struct hid_device *hdev)
>>>                             strlen(elan_acpi_id[i].id)))
>>>                        return true;
>>>            break;
>>> +    case USB_VENDOR_ID_SMARTLINKTECHNOLOGY:
>>> +        /* Multiple USB devices with identical IDs (mic & touchscreen).
>>> +         * The touch screen requires hid core processing, but the
>>> +         * microphone does not. They can be distinguished by 
>>> manufacturer
>>> +         * and serial number.
>>> +         */
>>> +        if (hdev->product == USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155 &&
>>> +            strncmp(hdev->name, "SmartlinkTechnology", 19) == 0 &&
>>> +            strncmp(hdev->uniq, "20201111000001", 14) == 0)
>> Using the serial number as a device identifier is somewhat risky. The
>> serial number is optional for a USB device but if it is used then it's
>> supposed to be unique for each device. Given how horrible the
>> configuration and HID descriptors are for this device it's unlikely that
>> they went to the trouble to give each unit a unique serial number. But
>> you should check a few of the devices (if you have more than one) to
>> verify they all have the same 20201111000001 serial number.
>>
>> It's too bad the bcdHID version test for 0x0201 didn't work. The
>> hid->version field is filled by usbhid_probe with bcdDevice before both
>> hid_lookup_quirk and hid_ignore are called and then updated with bcdHID
>> by usbhid_parse after they have been called.
>>
>>> +            return true;
>>> +        break;
>>>        }
>>>        if (hdev->type == HID_TYPE_USBMOUSE &&
>> Thanks
>> Terry

Re: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[zhangheng]

[-- Attachment #1: Type: text/plain, Size: 139 bytes --]

Hi Terry Junge，

I have made the changes as per your suggestion.
mic.txt is the microphone report descriptor and is working properly.




[-- Attachment #2: mic.txt --]
[-- Type: text/plain, Size: 293 bytes --]

klin@zhangheng:~/桌面$ sudo usbhid-dump 
001:008:002:DESCRIPTOR         1761275817.253121
 05 01 09 06 A1 01 05 07 19 E0 29 E7 15 00 25 01
 75 01 95 08 81 02 95 01 75 08 81 01 95 03 75 01
 05 08 19 01 29 03 91 02 95 01 75 05 91 01 95 06
 75 08 15 00 26 FF 00 05 07 19 00 2A FF 00 81 00
 C0


[-- Attachment #3: v3-0001-HID-quirks-Change-manufacturer-for-4c4a-4155.patch --]
[-- Type: text/plain, Size: 2479 bytes --]

From 4d670a785276a8fd1568c9e7e40179809b3dd5ec Mon Sep 17 00:00:00 2001
From: Zhang Heng <zhangheng@kylinos.cn>
Date: Fri, 12 Sep 2025 20:38:18 +0800
Subject: [PATCH v3] HID: quirks: Change manufacturer for 4c4a:4155

Based on available evidence, the USB ID 4c4a:4155 used by multiple
devices has been attributed to Jieli. The commit 1a8953f4f774
("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY") affected touchscreen
functionality. A manufacturer check was added to maintain microphone
compatibility, enabling both devices to function properly.

Fixes: 1a8953f4f774 ("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY")
Cc: stable@kernel.org
Tested-by: staffan.melin@oscillator.se
Signed-off-by: Zhang Heng <zhangheng@kylinos.cn>
---
 drivers/hid/hid-ids.h    |  4 ++--
 drivers/hid/hid-quirks.c | 11 ++++++++++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 5721b8414bbd..0b1ff1ec275e 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1539,7 +1539,7 @@
 #define USB_VENDOR_ID_SIGNOTEC			0x2133
 #define USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011	0x0018
 
-#define USB_VENDOR_ID_SMARTLINKTECHNOLOGY              0x4c4a
-#define USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155         0x4155
+#define USB_VENDOR_ID_JIELI_SDK_DEFAULT		0x4c4a
+#define USB_DEVICE_ID_JIELI_SDK_4155		0x4155
 
 #endif
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index ffd034566e2e..0058c01aa8b3 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -913,7 +913,6 @@ static const struct hid_device_id hid_ignore_list[] = {
 #endif
 	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_HP_5MP_CAMERA_5473) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_SMARTLINKTECHNOLOGY, USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155) },
 	{ }
 };
 
@@ -1062,6 +1061,16 @@ bool hid_ignore(struct hid_device *hdev)
 					     strlen(elan_acpi_id[i].id)))
 					return true;
 		break;
+	case USB_VENDOR_ID_JIELI_SDK_DEFAULT:
+		/*
+		 * Multiple USB devices with identical IDs (mic & touchscreen).
+		 * The touch screen requires hid core processing, but the
+		 * microphone does not. They can be distinguished by manufacturer.
+		 */
+		if (hdev->product == USB_DEVICE_ID_JIELI_SDK_4155 &&
+		    strncmp(hdev->name, "SmartlinkTechnology", 19) == 0)
+			return true;
+		break;
 	}
 
 	if (hdev->type == HID_TYPE_USBMOUSE &&
-- 
2.47.1

Re: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[Staffan Melin]

Thank you,

I can confirm that this latest patch fixes the issue on my GPD Duo.

Tested-by: staffan.melin@oscillator.se

Many thanks,

Staffan


On 2025-10-24 05:32, zhangheng wrote:
> Hi Terry Junge，
> 
> I have made the changes as per your suggestion.
> mic.txt is the microphone report descriptor and is working properly.

Re: [PATCH v2] HID: quirks: Add device descriptor for 4c4a:4155

[Terry Junge]

Hi Zhang,

Since the manufacturer has verified that all the microphones have the 
same serial number you could add the test for that as well if you want.

The report descriptor is clearly for a keyboard/keypad and should be 
ignored.

In any case, the current v3 attached patch does resolve the conflict.

Reviewed-by: Terry Junge <linuxhid@cosmicgizmosystems.com>

On 10/23/2025 8:32 PM, zhangheng wrote:
> Hi Terry Junge，
> 
> I have made the changes as per your suggestion.
> mic.txt is the microphone report descriptor and is working properly.
> 
> 
> 

[PATCH v4] HID: quirks: Change manufacturer for 4c4a:4155

[zhangheng]

[-- Attachment #2: v4-0001-HID-quirks-Change-manufacturer-for-4c4a-4155.patch --]
[-- Type: text/plain, Size: 2837 bytes --]

From 01be0e31b4fd991f955f77ec06d0c8b7a6d0fb13 Mon Sep 17 00:00:00 2001
From: Zhang Heng <zhangheng@kylinos.cn>
Date: Fri, 12 Sep 2025 20:38:18 +0800
Subject: [PATCH v4] HID: quirks: Change manufacturer for 4c4a:4155

Based on available evidence, the USB ID 4c4a:4155 used by multiple
devices has been attributed to Jieli. The commit 1a8953f4f774
("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY") affected touchscreen
functionality. Added checks for manufacturer and serial number to
maintain microphone compatibility, enabling both devices to function
properly.

Fixes: 1a8953f4f774 ("HID: Add IGNORE quirk for SMARTLINKTECHNOLOGY")
Cc: stable@vger.kernel.org
Tested-by: staffan.melin@oscillator.se
Signed-off-by: Zhang Heng <zhangheng@kylinos.cn>
---
Changes in v4:
-- add serial number. Since I saw JIELI using identical IDs for different
devices with distinct serial numbers, I worry SMARTLINKTECHNOLOGY might
reuse this ID for touchscreens. Adding serial number verification provides
extra insurance.
 drivers/hid/hid-ids.h    |  4 ++--
 drivers/hid/hid-quirks.c | 13 ++++++++++++-
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 66f05d02cfca..5e6e87487205 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1546,7 +1546,7 @@
 #define USB_VENDOR_ID_SIGNOTEC			0x2133
 #define USB_DEVICE_ID_SIGNOTEC_VIEWSONIC_PD1011	0x0018
 
-#define USB_VENDOR_ID_SMARTLINKTECHNOLOGY              0x4c4a
-#define USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155         0x4155
+#define USB_VENDOR_ID_JIELI_SDK_DEFAULT		0x4c4a
+#define USB_DEVICE_ID_JIELI_SDK_4155		0x4155
 
 #endif
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index bcd4bccf1a7c..22760ac50f2d 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -915,7 +915,6 @@ static const struct hid_device_id hid_ignore_list[] = {
 #endif
 	{ HID_USB_DEVICE(USB_VENDOR_ID_YEALINK, USB_DEVICE_ID_YEALINK_P1K_P4K_B2K) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, USB_DEVICE_ID_QUANTA_HP_5MP_CAMERA_5473) },
-	{ HID_USB_DEVICE(USB_VENDOR_ID_SMARTLINKTECHNOLOGY, USB_DEVICE_ID_SMARTLINKTECHNOLOGY_4155) },
 	{ }
 };
 
@@ -1064,6 +1063,18 @@ bool hid_ignore(struct hid_device *hdev)
 					     strlen(elan_acpi_id[i].id)))
 					return true;
 		break;
+	case USB_VENDOR_ID_JIELI_SDK_DEFAULT:
+		/*
+		 * Multiple USB devices with identical IDs (mic & touchscreen).
+		 * The touch screen requires hid core processing, but the
+		 * microphone does not. They can be distinguished by manufacturer
+		 * and serial number.
+		 */
+		if (hdev->product == USB_DEVICE_ID_JIELI_SDK_4155 &&
+		    strncmp(hdev->name, "SmartlinkTechnology", 19) == 0 &&
+		    strncmp(hdev->uniq, "20201111000001", 14) == 0)
+			return true;
+		break;
 	}
 
 	if (hdev->type == HID_TYPE_USBMOUSE &&
-- 
2.47.1

Re: [PATCH v4] HID: quirks: Change manufacturer for 4c4a:4155

[Staffan Melin]

Thank you,
 
this patch also works fine on my GPD DUO.
 
Tested-by: Staffan Melin, staffan.melin@oscillator.se
 
Best regards,
 
Staffan Melin
 
"zhangheng" zhangheng@kylinos.cn – 26 oktober 2025 kl. 04:35
> 
> 
>

Re: [PATCH v4] HID: quirks: Change manufacturer for 4c4a:4155

[Terry Junge]

for v4-0001-HID-quirks-Change-manufacturer-for-4c4a-4155.patch

Reviewed-by: Terry Junge <linuxhid@cosmicgizmosystems.com>

On 10/25/2025 8:34 PM, zhangheng wrote:

Re: [PATCH v4] HID: quirks: Change manufacturer for 4c4a:4155

[Jiri Kosina]

I have updated the shortlog to be a little bit more descriptive and 
applied, thanks.

-- 
Jiri Kosina
SUSE Labs