Re: [PATCH] HID: multitouch: Apply MT_QUIRK_CONFIDENCE quirk for multi-input devices

[Benjamin Tissoires]

On Mon, Jan 18, 2021 at 2:45 PM Kai-Heng Feng
<kai.heng.feng@xxxxxxxxxxxxx> wrote:
>
> Palm ejection stops working on some Elan and Synaptics touchpad after
> commit 40d5bb87377a ("HID: multitouch: enable multi-input as a quirk for
> some devices").
>
> The commit changes the mt_class from MT_CLS_WIN_8 to
> MT_CLS_WIN_8_FORCE_MULTI_INPUT, so MT_QUIRK_CONFIDENCE isn't applied
> anymore.
>
> So also apply the quirk since MT_CLS_WIN_8_FORCE_MULTI_INPUT is
> essentially MT_CLS_WIN_8.
>
> Fixes: 40d5bb87377a ("HID: multitouch: enable multi-input as a quirk for some devices")
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
> ---

Thanks for the patch, and for the hid-tools MR.

I have now added the "Cc: stable@xxxxxxxxxxxxxxx" tag and pushed to
for-5.11/upstream-fixes.

Cheers,
Benjamin

>  drivers/hid/hid-multitouch.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> index 0743ef51d3b2..8429ebe7097e 100644
> --- a/drivers/hid/hid-multitouch.c
> +++ b/drivers/hid/hid-multitouch.c
> @@ -758,7 +758,8 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
>                         MT_STORE_FIELD(inrange_state);
>                         return 1;
>                 case HID_DG_CONFIDENCE:
> -                       if (cls->name == MT_CLS_WIN_8 &&
> +                       if ((cls->name == MT_CLS_WIN_8 ||
> +                            cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT) &&
>                                 (field->application == HID_DG_TOUCHPAD ||
>                                  field->application == HID_DG_TOUCHSCREEN))
>                                 app->quirks |= MT_QUIRK_CONFIDENCE;
> --
> 2.29.2
>