[Intel-gfx] [PATCH 2/3] drm/i915: Check timings against hardware maximums

[Ville Syrjälä]

On Fri, Jun 15, 2018 at 07:44:08PM +0100, Chris Wilson wrote:
> Quoting Ville Syrjala (2018-06-15 18:44:05)
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > Validate that all display timings fit within the number of bits
> > we have in the transcoder timing registers.
> > 
> > The limits are:
> > hsw+:
> >  4k: vdisplay, vblank_start
> >  8k: everything else
> > gen3+:
> >  4k: h/vdisplay, h/vblank_start
> >  8k: everything else
> > gen2:
> >  2k: h/vdisplay, h/vblank_start
> >  4k: everything else
> > 
> > Also document the fact that the mode_config.max_width/height limits
> > refer to just the max framebuffer dimensions we support. Which may
> > be larger than the max hdisplay/vdisplay.
> 
> In the ddx, I used them to filter max hdisplay/vdisplay... And
> completely ignored them wrt to framebuffer.

Whatever works :)

-- 
Ville Syrjälä
Intel