linux-kernel - Re: [PATCH] Revert "HID: magicmouse: Set multi-touch keybits for Magic Mouse"

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Date:   Wed, 21 Jun 2017 08:59:44 +1000
From:   Peter Hutterer <peter.hutterer@...-t.net>
To:     Daniel Stone <daniels@...labora.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Che-Liang Chiou <clchiou@...omium.org>,
        Thierry Escande <thierry.escande@...labora.com>,
        Jiri Kosina <jkosina@...e.cz>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: Re: [PATCH] Revert "HID: magicmouse: Set multi-touch keybits for
 Magic Mouse"

On Thu, Jun 15, 2017 at 01:35:50PM +0100, Daniel Stone wrote:
> Setting these bits causes libinput to fail to initialize the device;
> setting BTN_TOUCH and BTN_TOOL_FINGER causes it to treat the mouse as a
> touchpad, and it then refuses to continue when it discovers ABS_X is not
> set.

What happens if you set ID_INPUT_MOUSE and unset ID_INPUT_TOUCHPAD with a
udev rule/hwdb entry? I think it should work then although we'll ignore the
touch bits - that mouse would require some special handling in libinput to
expose all its features.

Cheers,
   Peter
> 
> This breaks all known Wayland compositors, as well as Xorg when the
> libinput driver is being used.
> 
> This reverts commit f4b65b9563216b3e01a5cc844c3ba68901d9b195.
> 
> Signed-off-by: Daniel Stone <daniels@...labora.com>
> Cc: Che-Liang Chiou <clchiou@...omium.org>
> Cc: Thierry Escande <thierry.escande@...labora.com>
> Cc: Jiri Kosina <jkosina@...e.cz>
> Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> ---
>  drivers/hid/hid-magicmouse.c | 15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)
> 
> Jiri, can you please get this into 4.12 final?
> 
> diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
> index 1d6c997b3001..20b40ad26325 100644
> --- a/drivers/hid/hid-magicmouse.c
> +++ b/drivers/hid/hid-magicmouse.c
> @@ -349,7 +349,6 @@ static int magicmouse_raw_event(struct hid_device *hdev,
>  
>  	if (input->id.product == USB_DEVICE_ID_APPLE_MAGICMOUSE) {
>  		magicmouse_emit_buttons(msc, clicks & 3);
> -		input_mt_report_pointer_emulation(input, true);
>  		input_report_rel(input, REL_X, x);
>  		input_report_rel(input, REL_Y, y);
>  	} else { /* USB_DEVICE_ID_APPLE_MAGICTRACKPAD */
> @@ -389,16 +388,16 @@ static int magicmouse_setup_input(struct input_dev *input, struct hid_device *hd
>  		__clear_bit(BTN_RIGHT, input->keybit);
>  		__clear_bit(BTN_MIDDLE, input->keybit);
>  		__set_bit(BTN_MOUSE, input->keybit);
> +		__set_bit(BTN_TOOL_FINGER, input->keybit);
> +		__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
> +		__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
> +		__set_bit(BTN_TOOL_QUADTAP, input->keybit);
> +		__set_bit(BTN_TOOL_QUINTTAP, input->keybit);
> +		__set_bit(BTN_TOUCH, input->keybit);
> +		__set_bit(INPUT_PROP_POINTER, input->propbit);
>  		__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
>  	}
>  
> -	__set_bit(BTN_TOOL_FINGER, input->keybit);
> -	__set_bit(BTN_TOOL_DOUBLETAP, input->keybit);
> -	__set_bit(BTN_TOOL_TRIPLETAP, input->keybit);
> -	__set_bit(BTN_TOOL_QUADTAP, input->keybit);
> -	__set_bit(BTN_TOOL_QUINTTAP, input->keybit);
> -	__set_bit(BTN_TOUCH, input->keybit);
> -	__set_bit(INPUT_PROP_POINTER, input->propbit);
>  
>  	__set_bit(EV_ABS, input->evbit);
>  
> -- 
> 2.11.0
> 
> --
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