Ubuntu
xserver-xorg-video-intel package

  1. Bug #397617
  2. Comment #7

Comment 7 for bug 397617

Revision history for this message
In , Jesse Barnes (jbarnes-virtuousgeek) wrote :

(In reply to comment #4)
> (In reply to comment #3)
> > On the driver side, we just need to hook up support for sysfs backlight in the
> > KMS code.
> > The i915 driver probably needs to get new code here to support i2c based
> > backlight control on pre-opregion platforms.
>
> do you mean that register a sysfs backlight class device in KMS code, and
> control the backlight via i2c when poking this I/F?

Yes, in addition to adding backlight resource code to drmmode_display.c in the 2D driver.

> If yes, this may be a regression.
> Because we are trying to provide a unique backlight sysfs I/F for users. i.e.
> hiding platform specific functions if the generic ACPI video interface is
> available.

In many cases it isn't, and we need to use platform specific i2c commands.