linux-kernel - Re: [PATCH v2 1/2] drm/input_helper: Add new input-handling helper

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Message-ID: <98236dpcx39iOz8xAYrwGLfiLdwgUlljrbBgHL3wd8A0Wz4KzRk3PR8s_tb5Rxu4eScKI4483kB6Vhv-T64CJYOeQqwXlqo2c-64HvoS5cg=@emersion.fr>
Date:   Fri, 19 Nov 2021 16:04:28 +0000
From:   Simon Ser <contact@...rsion.fr>
To:     Daniel Vetter <daniel@...ll.ch>
Cc:     Pekka Paalanen <ppaalanen@...il.com>,
        Rob Clark <robdclark@...omium.org>,
        Brian Norris <briannorris@...omium.org>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Doug Anderson <dianders@...omium.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        "Kristian H . Kristensen" <hoegsberg@...gle.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        linux-input@...r.kernel.org
Subject: Re: [PATCH v2 1/2] drm/input_helper: Add new input-handling helper

On Friday, November 19th, 2021 at 16:53, Daniel Vetter <daniel@...ll.ch> wrote:

> Random idea ... should we perhaps let userspace connect the boosting? I.e.
> we do a bunch of standardized boost targets (render clocks, display sr
> exit), and userspace can then connect it to whichever input device it
> wants to?

On IRC we discussed having user-space hand over a FD to the kernel. When the FD
becomes readable, the kernel triggers the boost.

This would let user-space use e.g. an input device, an eventfd, or an epoll FD
with any combination of these as the boost signal.