RE: [Linux-fbdev-devel] Re: Framebuffer API with backlit displays

[Christian, A. <And...@co...>]

Russ Dill has been working on a generic backlight interface - see his
patch at http://russ.dhs.org/files/tuxpatches/backlight-2.4.16-rmk1.
The interface ioctl's include current and maximum backlight values. =20

I'd also add to the blanking and back/frontlight control a "screen
dimming" option.  The new OLED display panels burn power proportional to
screen brightness.

	- Andrew

> -----Original Message-----
> From: James Simmons [mailto:jsi...@tr...]
> Sent: Monday, December 17, 2001 5:27 PM
> To: Gettys, James
> Cc: Geert Uytterhoeven; Christian, Andrew; Packard, Keith; Linux Frame
> Buffer Device Development
> Subject: Re: [Linux-fbdev-devel] Re: Framebuffer API with backlit
displays
>=20
>=20
> On Mon, 17 Dec 2001, Jim Gettys wrote:
>=20
> > The issue is that we really may need a new interface to control the
> > backlight/frontlight, rather than relying on the VESA levels for
> > control.
>=20
> > So trying to cram this into the exisiting interface is causing real
> problems,
> > and I think it is time for a new additional interface to control
> frontlight
> > backlight, rather than try to bandaid things as we have to date.
>=20
> I agree. We still need to keep the old blank ioctl but I really like
to
> see the creation of a real power management API. Screen blanking and
> back/fton lights control fulls under that category in my mind. Any
ideas
> for a API?
>=20
>   .-.                               .-.
>   oo|  Give Microsoft The Bird!!!!  oo|
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> -----------------------------------------------------
>=20