[Intel-gfx] [PATCH] drm/i915: Eliminate lots of WARNs when there's no backlight present

[Ville Syrjälä]

On Thu, Jan 16, 2014 at 05:55:48PM +0100, Daniel Vetter wrote:
> On Thu, Jan 16, 2014 at 5:27 PM,  <ville.syrjala at linux.intel.com> wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >
> > My 855gm doesn't register the intel backlight but it still ends up
> > calling the backlight code to enable/disable the backlight via the
> > LVDS code. This leads to some WARNs due to backlight.max being 0.
> >
> > Let's have intel_panel_enable_backlight() and intel_panel_disable_backlight()
> > check whether there's a backlight present or not.
> >
> > Also move the backlight.present check from asle_set_backlight() into
> > intel_panel_set_backlight() for some extra symmetry.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Wouldn't that be a perfect machine to test Jani's
> init-backlight-from-vbt patch? Iirc all the infrastructure is now
> there ...

My assumption has ben that the intel backlight stuff isn't hooked up
to anything. But I guess I could give it a go.

-- 
Ville Syrjälä
Intel OTC