E6510: Black screen on resume with 3.2-rc

[hettevisser at gmail.com (Hette Visser)]

Hi,

with kernel 3.2-rc the DP of my Dell E6510 stays black on resume,
while the attached monitor doesn't.

I've bisected this and the following change in commit
cd9dde44f47501394b9f0715b6a36a92aa74c0d0 introduced this problem:

intel_dp.c:
@@ -195,7 +211,7 @@ intel_dp_link_required(struct drm_device *dev,
struct intel_dp *intel_dp, int pi
       if (intel_crtc)
               bpp = intel_crtc->bpp;

-       return (pixel_clock * bpp + 7) / 8;
+       return (pixel_clock * bpp + 9) / 10;
 }


Regards,

Hette Visser