[Intel-gfx] [PATCH v3 2/2] drivers: i915: Default max backlight brightness value

[Matthew Garrett]

On Tue, Nov 08, 2011 at 02:05:14PM -0800, Simon Que wrote:
> On Tue, Nov 8, 2011 at 1:42 PM, Matthew Garrett <mjg59 at srcf.ucam.org> wrote:
> 
> > I feel like I'm missing something here. Where's the firmware getting its
> > initial value from?
> 
> 
> My understanding is that normally, the firmware's VBIOS can program the
> value of the PWM register.  But if the firmware doesn't have the VBIOS
> initialization code, it can still provide an initial value using this new
> param, as part of the kernel command line.  Either way, it's up to the
> person writing or selecting the firmware to decide what initial value to
> provide.

So the firmware doesn't set up graphics itself, it's entirely up to the 
kernel? What hardware is this for?

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