From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Hans de Goede <hdegoede@redhat.com>
Cc: Sebastian Wick <sebastian.wick@redhat.com>,
Martin Roukala <martin.roukala@mupuf.org>,
Christoph Grenz <christophg+lkml@grenz-bonn.de>,
wayland <wayland-devel@lists.freedesktop.org>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
Yusuf Khan <yusisamerican@gmail.com>
Subject: Re: [RFC] drm/kms: control display brightness through drm_connector properties
Date: Wed, 18 May 2022 17:40:58 +0300 [thread overview]
Message-ID: <YoUFeoMMiTRSADrY@intel.com> (raw)
In-Reply-To: <5423103a-3707-ba99-f45e-8608bc594bbd@redhat.com>
On Wed, May 18, 2022 at 02:59:58PM +0200, Hans de Goede wrote:
> Hi,
>
> On 4/14/22 15:10, Jani Nikula wrote:
> > There are some cases where we can actually get a rough PWM/luminance
> > curve from i915 opregion. I think maybe 16 data points. We've never
> > exposed that. My idea was that you'd have a property where you could add
> > data points for the curve, it could get pre-populated by the kernel if
> > the kernel knows how to do it, defaulting to linear, but it could also
> > be set or adjusted by userspace. The point would be that the userspace
> > adjusts brightness linearly, and the kernel would use the curve data
> > points to adjust it non-linearly. The userspace could have completely
> > separated brightness adjustment and curve adjustment, and the brightness
> > adjustment would be dead simple.
>
> Interesting, I guess this could be a future feature addition on top
> of my work.
Here's an outdated branch:
https://github.com/vsyrjala/linux/commits/blcm_backlight
Wrote that some years ago after getting fed up with the useless
non-linear respose of the brightness up/down buttons on my laptop.
Been running it ever since.
--
Ville Syrjälä
Intel
next prev parent reply other threads:[~2022-05-18 14:41 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 15:38 [RFC] drm/kms: control display brightness through drm_connector properties Hans de Goede
2022-04-07 16:51 ` Simon Ser
2022-04-07 17:43 ` Hans de Goede
2022-04-07 21:05 ` Alex Deucher
2022-04-08 8:07 ` Daniel Vetter
2022-04-08 9:58 ` Hans de Goede
2022-04-08 10:09 ` Hans de Goede
2022-04-08 10:16 ` Simon Ser
2022-04-08 10:26 ` Hans de Goede
2022-04-13 8:32 ` Daniel Vetter
2022-04-13 8:38 ` Simon Ser
2022-04-13 9:44 ` Hans de Goede
2022-04-08 10:23 ` Hans de Goede
2022-04-08 14:08 ` Alex Deucher
2022-04-08 14:55 ` Hans de Goede
2022-04-08 15:11 ` Alex Deucher
2022-04-11 10:18 ` Hans de Goede
2022-04-11 11:34 ` Pekka Paalanen
2022-04-11 11:50 ` Hans de Goede
2022-04-11 13:11 ` Mikhail Gusarov
2022-04-11 14:11 ` Alex Deucher
2022-04-14 10:24 ` Jani Nikula
2022-04-27 14:03 ` Daniel Vetter
2022-04-27 14:23 ` Jani Nikula
2022-04-27 14:26 ` Daniel Vetter
2022-04-29 8:55 ` Hans de Goede
2022-04-29 8:59 ` Simon Ser
2022-04-29 9:06 ` Pekka Paalanen
2022-04-29 9:49 ` Lattannavar, Sameer
2022-04-08 8:22 ` Simon Ser
2022-04-08 15:00 ` Hans de Goede
2022-04-11 10:35 ` Hans de Goede
2022-04-07 18:58 ` Carsten Haitzler
2022-04-11 10:27 ` Hans de Goede
2022-04-11 11:14 ` Carsten Haitzler
2022-04-14 13:10 ` Jani Nikula
2022-05-18 12:59 ` Hans de Goede
2022-05-18 14:23 ` Jani Nikula
2022-05-31 10:40 ` Hans de Goede
2022-05-18 14:40 ` Ville Syrjälä [this message]
2022-08-24 2:18 ` Yusuf Khan
2022-08-25 8:27 ` Hans de Goede
2022-08-25 21:40 ` Yusuf Khan
2022-08-28 8:08 ` Hans de Goede
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