[Intel-gfx] BACKLIGHT property for KMS case

[Matthew Garrett]

On Tue, Aug 18, 2009 at 10:00:43AM +0800, ykzhao wrote:

> Another issue is that the brightness level is so big when the
> native/combo mode is used. For example: 0-65535 for the native control
> method. The user will be confused by so many brightness levels.

There's no problem with this for userspace. We don't show every single 
value to the user, but it's helpful if the driver exposes everything it 
can do.

> How about using the legacy control method?

If the firmware touches the BLC registers and we just touch the legacy 
registers then things will become very confused.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org