linux-kernel - Re: [PATCH 7/7 v3] HID: magicmouse: Adjust major / minor axes to scale

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Date:	Thu, 2 Sep 2010 16:55:34 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Chase Douglas <chase.douglas@...onical.com>
Cc:	Michael Poole <mdpoole@...ilus.org>,
	Henrik Rydberg <rydberg@...omail.se>,
	Tejun Heo <tj@...nel.org>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/7 v3] HID: magicmouse: Adjust major / minor axes to
 scale

On Tue, 31 Aug 2010, Chase Douglas wrote:

> From: Henrik Rydberg <rydberg@...omail.se>
> 
> By visual inspection, the reported touch_major and touch_minor axes
> are roughly a factor of four too small. The factor is approximate,
> since the protocol is not known and the HID report encodes touch size
> with fewer bits than positions. This patch scales the reported values
> by a factor of four.
> 
> Signed-off-by: Henrik Rydberg <rydberg@...omail.se>
> Signed-off-by: Chase Douglas <chase.douglas@...onical.com>
> Acked-by: Michael Poole <mdpoole@...ilus.org>
> ---
>  drivers/hid/hid-magicmouse.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
> index 6f13e56..0792b16 100644
> --- a/drivers/hid/hid-magicmouse.c
> +++ b/drivers/hid/hid-magicmouse.c
> @@ -254,8 +254,8 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda
>  	/* Generate the input events for this touch. */
>  	if (report_touches && down) {
>  		input_report_abs(input, ABS_MT_TRACKING_ID, id);
> -		input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major);
> -		input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor);
> +		input_report_abs(input, ABS_MT_TOUCH_MAJOR, touch_major << 2);
> +		input_report_abs(input, ABS_MT_TOUCH_MINOR, touch_minor << 2);
>  		input_report_abs(input, ABS_MT_ORIENTATION, orientation);
>  		input_report_abs(input, ABS_MT_POSITION_X, x);
>  		input_report_abs(input, ABS_MT_POSITION_Y, y);

Care to fold this into "[PATCH 3/7 v3] HID: magicmouse: simplify touch 
data bit manipulation", which is actually adding this?

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
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