Date: Fri, 27 Mar 2015 16:53:48 +0100 From: Hans Petter Selasky <hps@selasky.org> To: "Ranjan1018 ." <214748mv@gmail.com>, FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: [PATCH] Adding backlight support for the i915 driver. Message-ID: <55157D0C.2040808@selasky.org> In-Reply-To: <CACyC=qZAhL3RPqErQh1BjjrhkbvmLXnrVT4i0LEtT10vbjVT2w@mail.gmail.com> References: <CACyC=qZAhL3RPqErQh1BjjrhkbvmLXnrVT4i0LEtT10vbjVT2w@mail.gmail.com>
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On 03/27/15 16:01, Ranjan1018 . wrote: > This patch exposes the backlight support via a sysctl: > > set the backlight to 10%: > > # sysctl hw.dri.0.i915_backlight=10 > > hw.dri.0.i915_backlight: 25 -> 10 > > set the backlight to 50%: > > # sysctl hw.dri.0.i915_backlight=50 > > hw.dri.0.i915_backlight: 10 -> 50 > > decrease the current backlight value: > > # sysctl hw.dri.0.i915_backlight=-1000 > > hw.dri.0.i915_backlight: 50 -> 43 > > increment the current backlight value: > > # sysctl hw.dri.0.i915_backlight=1000 > > hw.dri.0.i915_backlight: 43 -> 51 > > # sysctl hw.dri.0.i915_backlight=1000 > > hw.dri.0.i915_backlight: 51 -> 60 > > I am running this path on for about a week without issue. > > This path can be found at: > https://github.com/maurizio-emmex/i915_backlight_freebsd > > I thank Elizabeth Myers, elizabeth at interlinked dot me, for the idea of > adding the backlight support for the i915 driver and for the original patch. > > Regards, > Maurizio Maybe you want to use "CTLFLAG_RWTUN" so that it also can be set from /boot/loader.conf ? --HPS
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