linux-kernel - Re: [PATCH] Input: goodix - fix inverted Y coordinate on SUPI S10

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Message-ID: <0840e4ec-0b61-4e0d-9d67-d0eb2ab2d6a1@kernel.org>
Date: Thu, 29 Jan 2026 19:40:39 +0100
From: Hans de Goede <hansg@...nel.org>
To: Yajat Kumar <yajatapps3@...il.com>,
 Dmitry Torokhov <dmitry.torokhov@...il.com>,
 "open list:GOODIX TOUCHSCREEN" <linux-input@...r.kernel.org>,
 open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Input: goodix - fix inverted Y coordinate on SUPI S10

Hi Yajat,

On 11-Jan-26 22:30, Hans de Goede wrote:
> Hi Yajat,
> 
> On 30-Dec-25 23:16, Yajat Kumar wrote:
>> The touchscreen on the SUPI S10 reports inverted Y coordinates, causing
>> touch input to be mirrored vertically relative to the display.
>>
>> Add a DMI-based quirk to invert the Y coordinate on this device so that
>> touch input matches the display orientation.
>>
>> Tested on SUPI S10 tablet with Goodix touchscreen controller.
>>
>> Signed-off-by: Yajat Kumar <yajatapps3@...il.com>
> 
> Thank you for your patch. This kind of quirks really belong
> in drivers/platform/x86/touchscreen_dmi.c instead of in individual
> touchscreen drivers.
> 
> The inverted_x_screen[] DMI quirk is a left-over from before we
> moved these quirks to touchscreen_dmi.c and unfortunately we cannot
> move this because we've not been able to find someone to test this.
> 
> I've attached a patch which should fix the issue using
> touchscreen_dmi.c . Note you may need to change the GDIX1001 in
> the patch to GDIX1002, see "ls /sys/bus/i2c/devices" to see which
> ACPI HID your touchscreen is using.
> 
> Can you please test the attached patch ?

Can you please confirm if the attached patch works, or at
a minimum check if the touchscreen is listed as i2c-GDIX1001:*
or i2c-GDIX1002:* under /sys/bus/i2c/devices ?

Regards,

Hans




>> ---
>>  drivers/input/touchscreen/goodix.c | 22 ++++++++++++++++++++++
>>  1 file changed, 22 insertions(+)
>>
>> diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
>> index f8798d11ec03..d675a85a9312 100644
>> --- a/drivers/input/touchscreen/goodix.c
>> +++ b/drivers/input/touchscreen/goodix.c
>> @@ -160,6 +160,22 @@ static const struct dmi_system_id inverted_x_screen[] = {
>>  	{}
>>  };
>>  
>> +/*
>> + * Those tablets have their y coordinate inverted
>> + */
>> +static const struct dmi_system_id inverted_y_screen[] = {
>> +#if defined(CONFIG_DMI) && defined(CONFIG_X86)
>> +	{
>> +		.ident = "SUPI S10",
>> +		.matches = {
>> +			DMI_MATCH(DMI_SYS_VENDOR, "SUPI"),
>> +			DMI_MATCH(DMI_PRODUCT_NAME, "S10")
>> +		},
>> +	},
>> +#endif
>> +	{}
>> +};
>> +
>>  /**
>>   * goodix_i2c_read - read data from a register of the i2c slave device.
>>   *
>> @@ -1212,6 +1228,12 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
>>  			"Applying 'inverted x screen' quirk\n");
>>  	}
>>  
>> +	if (dmi_check_system(inverted_y_screen)) {
>> +		ts->prop.invert_y = true;
>> +		dev_dbg(&ts->client->dev,
>> +			"Applying 'inverted y screen' quirk\n");
>> +	}
>> +
>>  	error = input_mt_init_slots(ts->input_dev, ts->max_touch_num,
>>  				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
>>  	if (error) {

View attachment "0001-platform-x86-touchscreen_dmi-Add-quirk-for-y-inverte.patch" of type "text/x-patch" (2074 bytes)