HID: i2c-hid: Add i2c-hid-quirk-bad-input-size quirk for 0911:5288 device

[PATCH] HID: i2c-hid: Add i2c-hid-quirk-bad-input-size quirk for 0911:5288 device

Posted by Youth Cao 3 weeks, 1 day ago

I have recently acquired a cheap Apollo Lake-based laptop that uses a
Hynitron CST128-A touchpad controller. While booting from a Debian LiveCD,
the kernel log is flooded with the following error (though the touchpad
works well):

  i2c_hid_acpi i2c-ALPS0001:00: i2c_hid_get_input: incomplete report (27/42405)

The CST128-A was identified via ACPI as ALPS0001:00, and the I2C HID
device ID (0911:5288) was shared with the Hantick 5288.

Add the I2C_HID_QUIRK_BAD_INPUT_SIZE quirk option to the existing Hantick
5288 quirk entry to suppress the kernel log flood.

Signed-off-by: Youth Cao <cocoh2os08@gmail.com>
---
 drivers/hid/i2c-hid/i2c-hid-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 0e725a0f0abe..776dd14feba7 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -123,7 +123,7 @@ static const struct i2c_hid_quirks {
 	__u32 quirks;
 } i2c_hid_quirks[] = {
 	{ I2C_VENDOR_ID_HANTICK, I2C_PRODUCT_ID_HANTICK_5288,
-		I2C_HID_QUIRK_NO_IRQ_AFTER_RESET },
+		I2C_HID_QUIRK_NO_IRQ_AFTER_RESET | I2C_HID_QUIRK_BAD_INPUT_SIZE },
 	{ I2C_VENDOR_ID_ITE, I2C_DEVICE_ID_ITE_VOYO_WINPAD_A15,
 		I2C_HID_QUIRK_NO_IRQ_AFTER_RESET },
 	{ I2C_VENDOR_ID_RAYDIUM, I2C_PRODUCT_ID_RAYDIUM_3118,
-- 
2.47.3

Re: [PATCH] HID: i2c-hid: Add i2c-hid-quirk-bad-input-size quirk for 0911:5288 device

Posted by Jiri Kosina 2 weeks ago

On Fri, 4 Sep 2026, Youth Cao wrote:

> I have recently acquired a cheap Apollo Lake-based laptop that uses a
> Hynitron CST128-A touchpad controller. While booting from a Debian LiveCD,
> the kernel log is flooded with the following error (though the touchpad
> works well):
> 
>   i2c_hid_acpi i2c-ALPS0001:00: i2c_hid_get_input: incomplete report (27/42405)
> 
> The CST128-A was identified via ACPI as ALPS0001:00, and the I2C HID
> device ID (0911:5288) was shared with the Hantick 5288.
> 
> Add the I2C_HID_QUIRK_BAD_INPUT_SIZE quirk option to the existing Hantick
> 5288 quirk entry to suppress the kernel log flood.
> 
> Signed-off-by: Youth Cao <cocoh2os08@gmail.com>
> ---
>  drivers/hid/i2c-hid/i2c-hid-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
> index 0e725a0f0abe..776dd14feba7 100644
> --- a/drivers/hid/i2c-hid/i2c-hid-core.c
> +++ b/drivers/hid/i2c-hid/i2c-hid-core.c
> @@ -123,7 +123,7 @@ static const struct i2c_hid_quirks {
>  	__u32 quirks;
>  } i2c_hid_quirks[] = {
>  	{ I2C_VENDOR_ID_HANTICK, I2C_PRODUCT_ID_HANTICK_5288,
> -		I2C_HID_QUIRK_NO_IRQ_AFTER_RESET },
> +		I2C_HID_QUIRK_NO_IRQ_AFTER_RESET | I2C_HID_QUIRK_BAD_INPUT_SIZE },
>  	{ I2C_VENDOR_ID_ITE, I2C_DEVICE_ID_ITE_VOYO_WINPAD_A15,
>  		I2C_HID_QUIRK_NO_IRQ_AFTER_RESET },
>  	{ I2C_VENDOR_ID_RAYDIUM, I2C_PRODUCT_ID_RAYDIUM_3118,

Applied, thanks.

-- 
Jiri Kosina
SUSE Labs