[Intel-gfx] [PATCH] drm/i915: Add i915.dp_limit_max_lane_count driver option.

[Michal Srb]

On Tuesday 26 of March 2013 16:49:30 Daniel Vetter wrote:
> On Tue, Mar 26, 2013 at 4:40 PM, Michal Srb <msrb at suse.com> wrote:
> > I have IBM POS machine (4852-570 Truman) that has internal monitor
> > connected over display port. It reports to have 2 lanes, but only 1
> > lane works reliably. With 2 lanes used, the monitor sometimes doesn't
> > turn on. It seems that this is hardware issue specific for this model.
> > 
> > From discussion that was around the
> > 2514bc510d0c3aadcc5204056bb440fa36845147 commit I understand there are
> > more machines that have similar problems. This option can be used to
> > solve them.
> 
> It sounds like we need to start with a DPCD quirk database ... Ajax?
> -Daniel

Any update?
DPCD of this monitor is 10 0a 82 40 00 00 01 00 02 00 00 00 10 01 00 by the 
way.

Is the i915.dp_limit_max_lane_count unacceptable even as temporary workaround?

Michal Srb