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HID: multitouch: Add support for GT7868Q

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GT7868Q has incorrect data in the report and needs a fixup.
The change enables haptic touchpad on Lenovo ThinkBook 13x Gen 4
and has been tested on the device.

Signed-off-by: Dmitry Savin <envelsavinds@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Dmitry Savin 2024-07-16 23:27:57 +01:00 committed by Jiri Kosina
parent 97155021ae
commit c8000deb68
2 changed files with 35 additions and 0 deletions
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2
drivers/hid/hid-ids.h
View File

@ -521,6 +521,8 @@
#define USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100 0xe100
#define I2C_VENDOR_ID_GOODIX 0x27c6
#define I2C_DEVICE_ID_GOODIX_01E8 0x01e8
#define I2C_DEVICE_ID_GOODIX_01E9 0x01e9
#define I2C_DEVICE_ID_GOODIX_01F0 0x01f0
#define USB_VENDOR_ID_GOODTOUCH 0x1aad

33
drivers/hid/hid-multitouch.c
View File

@ -1441,6 +1441,30 @@ static int mt_event(struct hid_device *hid, struct hid_field *field,
return 0;
}
static __u8 *mt_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *size)
{
if (hdev->vendor == I2C_VENDOR_ID_GOODIX &&
(hdev->product == I2C_DEVICE_ID_GOODIX_01E8 ||
hdev->product == I2C_DEVICE_ID_GOODIX_01E9)) {
if (rdesc[607] == 0x15) {
rdesc[607] = 0x25;
dev_info(
&hdev->dev,
"GT7868Q report descriptor fixup is applied.\n");
} else {
dev_info(
&hdev->dev,
"The byte is not expected for fixing the report descriptor. \
It's possible that the touchpad firmware is not suitable for applying the fix. \
got: %x\n",
rdesc[607]);
}
}
return rdesc;
}
static void mt_report(struct hid_device *hid, struct hid_report *report)
{
struct mt_device *td = hid_get_drvdata(hid);
@ -2035,6 +2059,14 @@ static const struct hid_device_id mt_devices[] = {
MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
USB_DEVICE_ID_GAMETEL_MT_MODE) },
/* Goodix GT7868Q devices */
{ .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
I2C_DEVICE_ID_GOODIX_01E8) },
{ .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
I2C_DEVICE_ID_GOODIX_01E8) },
/* GoodTouch panels */
{ .driver_data = MT_CLS_NSMU,
MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
@ -2270,6 +2302,7 @@ static struct hid_driver mt_driver = {
.feature_mapping = mt_feature_mapping,
.usage_table = mt_grabbed_usages,
.event = mt_event,
.report_fixup = mt_report_fixup,
.report = mt_report,
.suspend = pm_ptr(mt_suspend),
.reset_resume = pm_ptr(mt_reset_resume),