linux-kernel - Re: [PATCH 4/8] HID: input: use the Resolution Multiplier for high-resolution scrolling

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Message-ID: <CA+jURcv+1xWUR=xabVr+70LthoQqNbLZ_a8zTXxEeLrG4=wohw@mail.gmail.com>
Date:   Mon, 26 Nov 2018 18:17:15 -0800
From:   Harry Cutts <hcutts@...omium.org>
To:     Peter Hutterer <peter.hutterer@...-t.net>
Cc:     linux-input@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>, jikos@...nel.org,
        torvalds@...ux-foundation.org,
        Nestor Lopez Casado <nlopezcasad@...itech.com>,
        linux-kernel@...r.kernel.org, benjamin.tissoires@...hat.com
Subject: Re: [PATCH 4/8] HID: input: use the Resolution Multiplier for
 high-resolution scrolling

On Thu, 22 Nov 2018 at 15:28, Peter Hutterer <peter.hutterer@...-t.net> wrote:
> The choices we have now are:
> - use 1200 or 12000 internally and divide by 10 before sending the
>   final value
> - just make the evdev API use 1200 or 12000 and let userspace deal with it.
>   much simpler.
>
> Any suggestions/comments?

The second option seems cleaner to me, as then we don't have multiple
representations of the scroll amount to get mixed up.

Harry Cutts
Chrome OS Touch/Input team