linux-kernel - Re: [PATCH] hid-multitouch: Filter collections by application usage.

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Date:	Tue, 16 Aug 2011 09:29:31 +0200
From:	Benjamin Tissoires <benjamin.tissoires@...il.com>
To:	jeffbrown@...roid.com
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	jkosina@...e.cz, rydberg@...omail.se, chatty@...c.fr
Subject: Re: [PATCH] hid-multitouch: Filter collections by application usage.

Hi Jeff,

thank you for resubmitting this patch set.

Acked-By: Benjamin Tissoires <Benjamin_Tissoires@...itech.com>

Cheers,
Benjamin

On Tue, Aug 16, 2011 at 01:44,  <jeffbrown@...roid.com> wrote:
> From: Jeff Brown <jeffbrown@...roid.com>
>
> This change fixes two problems.
>
> First, it ensures that the hid-multitouch driver does not incorrectly
> map GenericDesktop usages that are intended for other applications,
> such as a Mouse.
>
> Second, it sets the appropriate input properties so that user-space
> can distinguish TouchScreen devices (INPUT_PROP_DIRECT) from
> TouchPad devices (INPUT_PROP_POINTER) and configure them accordingly.
>
> Signed-off-by: jeffbrown@...roid.com
> ---
>  drivers/hid/hid-multitouch.c |   10 ++++++++++
>  1 files changed, 10 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
> index 58d0e7a..4ee21ac 100644
> --- a/drivers/hid/hid-multitouch.c
> +++ b/drivers/hid/hid-multitouch.c
> @@ -213,6 +213,16 @@ static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
>        struct mt_class *cls = td->mtclass;
>        __s32 quirks = cls->quirks;
>
> +       /* Only map fields from TouchScreen or TouchPad collections.
> +         * We need to ignore fields that belong to other collections
> +         * such as Mouse that might have the same GenericDesktop usages. */
> +       if (field->application == HID_DG_TOUCHSCREEN)
> +               set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
> +       else if (field->application == HID_DG_TOUCHPAD)
> +               set_bit(INPUT_PROP_POINTER, hi->input->propbit);
> +       else
> +               return 0;
> +
>        switch (usage->hid & HID_USAGE_PAGE) {
>
>        case HID_UP_GENDESK:
> --
> 1.7.0.4
>
> --
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