From: Matthew Garrett <matthew.garrett@nebula.com>
To: "marcheu@chromium.org" <marcheu@chromium.org>
Cc: "jani.nikula@intel.com" <jani.nikula@intel.com>,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
"ben@bwidawsk.net" <ben@bwidawsk.net>
Subject: Re: [RFC PATCH 2/2] drm/i915: respect the VBT minimum backlight brightness
Date: Thu, 5 Jun 2014 16:34:40 +0000 [thread overview]
Message-ID: <1401986079.18056.5.camel@x230> (raw)
In-Reply-To: <CADMs+9bYYMvYoadRG-e_1mdvXp2W=mZes8LYYiSL=j5KuFv76Q@mail.gmail.com>
On Wed, 2014-06-04 at 08:04 -0700, Stéphane Marchesin wrote:
> Well, for example ACPI backlight isn't the default on intel, instead
> i915 implements its own backlight. ACPI backlight doesn't support as
> many backlight levels as the native backlight for example. So I do
> think that ACPI backlight is inferior.
ACPI backlight is the default on most pre-Windows 8 i915 systems.
Userspace which assumes that backlight value 0 has any specific meaning
is broken userspace. Adding an additional interface that allows
disabling the backlight without powering down the panel seems like a
completely reasonable thing to do, though.
--
Matthew Garrett <matthew.garrett@nebula.com>
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next prev parent reply other threads:[~2014-06-05 16:49 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-29 20:30 [RFC PATCH 1/2] drm/i915: shuffle panel code Jani Nikula
2014-04-29 20:30 ` [RFC PATCH 2/2] drm/i915: respect the VBT minimum backlight brightness Jani Nikula
2014-04-29 20:37 ` Jani Nikula
2014-05-20 19:08 ` Jesse Barnes
2014-06-06 13:40 ` Jani Nikula
2014-06-03 16:40 ` Stéphane Marchesin
2014-06-03 20:26 ` Daniel Vetter
2014-06-04 8:25 ` Stéphane Marchesin
2014-06-04 9:11 ` Jani Nikula
2014-06-04 15:04 ` Stéphane Marchesin
2014-06-05 16:30 ` Jesse Barnes
2014-06-05 16:34 ` Matthew Garrett [this message]
2014-05-20 19:00 ` [RFC PATCH 1/2] drm/i915: shuffle panel code Jesse Barnes
2014-05-20 19:08 ` Daniel Vetter
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