linux-kernel - Re: [PATCH] xen/input: do not advertise multi-touch pressure support

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Message-ID: <20180102173953.tje4tz2ng3fnfijw@dtor-ws>
Date:   Tue, 2 Jan 2018 09:39:53 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Oleksandr Andrushchenko <andr2000@...il.com>
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        linux-input@...r.kernel.org,
        Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>,
        Andrii Chepurnyi <andrii_chepurnyi@...m.com>
Subject: Re: [PATCH] xen/input: do not advertise multi-touch pressure support

On Tue, Jan 02, 2018 at 10:12:55AM +0200, Oleksandr Andrushchenko wrote:
> From: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
> 
> Some user-space applications expect multi-touch pressure
> on contact to be reported if it is advertised in device
> properties. Otherwise, such applications may treat reports
> not as actual touches, but hovering. Currently this is
> only advertised, but not reported.
> Fix this by not advertising that ABS_MT_PRESSURE is supported.
> 
> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>
> Signed-off-by: Andrii Chepurnyi <andrii_chepurnyi@...m.com>

Applied, thank you.

> ---
>  drivers/input/misc/xen-kbdfront.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/input/misc/xen-kbdfront.c b/drivers/input/misc/xen-kbdfront.c
> index 6bf56bb5f8d9..d91f3b1c5375 100644
> --- a/drivers/input/misc/xen-kbdfront.c
> +++ b/drivers/input/misc/xen-kbdfront.c
> @@ -326,8 +326,6 @@ static int xenkbd_probe(struct xenbus_device *dev,
>  				     0, width, 0, 0);
>  		input_set_abs_params(mtouch, ABS_MT_POSITION_Y,
>  				     0, height, 0, 0);
> -		input_set_abs_params(mtouch, ABS_MT_PRESSURE,
> -				     0, 255, 0, 0);
>  
>  		ret = input_mt_init_slots(mtouch, num_cont, INPUT_MT_DIRECT);
>  		if (ret) {
> -- 
> 2.7.4
> 

-- 
Dmitry