[Nouveau] [Bug 67628] [NVC1] [BISECTED] Monitor on Display port shows distortions

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=67628

--- Comment #25 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #24)
> It looks like that function is in
> drivers/gpu/drm/nouveau/core/engine/disp/dport.c, but I can't figure out how
> it should be modified to set the lane count.

Change

        dp->link_nr = dp->dpcd[2] & DPCD_RC02_MAX_LANE_COUNT;
        while ((dp->link_nr >> 1) * link_bw[0] > datarate)
            dp->link_nr >>= 1;

To

dp->link_nr = 4;

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